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tc - 320 446mhz service manual 1 contents contents ................................ ................................ ................................ ............................. 1 introduction ................................ ................................ ................................ ........................ 2 safety information ................................ ................................ ................................ ............. 2 radio overview ................................ ................................ ................................ .................. 3 software specifications ................................ ................................ ................................ ..... 6 circuit description ................................ ................................ ................................ ........... 10 cpu pins ................................ ................................ ................................ ........................... 1 6 tc - 320 446mhz parts list 1 ................................ ................................ ............................ 20 adjustment description ................................ ................................ ................................ .. 28 troubleshooting flow chart ................................ ................................ ........................... 36 disassembly and assembly for repair ................................ ................................ .......... 39 exploded view ................................ ................................ ................................ .................. 43 tc - 320 446mhz parts list 2 ................................ ................................ ............................ 44 packing diagram ................................ ................................ ................................ .............. 46 tc - 320 446mhz pcb view top layer ................................ ................................ ............. 47 tc - 320 446mhz pcb view bottom layer ................................ ................................ ....... 48 tc - 320 446mhz level diagram ................................ ................................ ....................... 49 tc - 320 446mhz block diagram ................................ ................................ ...................... 50 tc - 320 446mhz schematic diagram (rf) ................................ ................................ ...... 51 tc - 320 44 6mhz schematic diagram (cpu) ................................ ................................ ... 52 tc - 320 446mhz schematic diagram(pll) ................................ ................................ ..... 53 specifications ................................ ................................ ................................ ................... 54
tc - 320 44 6mhz service manual 2 introduction manual scope this manual is intended for use by experienced technicians familiar with similar types of communication equipment. it contains all service information required for the equipment and is current as of the publication date. safety information the following safety precautions shall always be observed during operation, service and repair of this equipment. this radio shall be serviced by qualifie d technicians only. only use hyt supplied or approved batteries and chargers. to avoid electromagnetic interference and/or compatibility conflicts, turn off your radio in any area where posted notices instruct you to do so. turn off your radio before boa rding an aircraft. any use of the radio must be in accordance with airline regulations or crew instructions. for vehicles with an air bag, do not place a radio in the area over an air bag or in the air bag deployment area. turn off your radio prior to en tering any area with explosive and flammable materials. do not charge or replace your battery in a location with explosive and flammable materials. turn off your radio before entering a blasting area. do not use any portable radio that has a damaged ant enna. if a damaged antenna comes into contact with your skin, a minor burn may result. do not expose the radio to direct sunlight for a long time, nor place it close to a heating source. when transmitting with a portable radio, hold the radio in a vertic al position with the microphone 2.5 to 5.0 centimeters (one to two inches) away from your lips. keep antenna at least 2.5 centimeters (one inch) away from your body when transmitting. if you wear a portable radio on your body, ensure that the antenna is at least 2.5 centimeters (one inch) away from your body when transmitting. radio overview
tc - 320 44 6mhz service manual 3 (1) ptt (push - to - talk) key (2) sk (programmable key) (3) speaker (4) volume control keys [+] / [ - ] (5) microphone (6) nameplate (7) charging terminal (8) antenna (9) power on/off key (10) channel/status indicator (11) channel selector knob (12) charge indicator (13) accessory jack cover (14) audio accessory jack (15) mini usb jack (16) strap hole (17) screw of belt clip (18) belt clip (19) rear cover (20) b attery latch ptt (push - to - talk) key
tc - 320 44 6mhz service manual 4 press and hold down the ptt key to transmit, and release it to receive. sk (side key) side key can be programmed with long/short press functions by your dealer. note: short press means key press no longer than 1 sec ond, and long press means key press longer than 1 second. channel/status indicator status indications and alert tones are shown in the table below: operations/functions led indications and alert tones wired clone to enter wired clone mode hold down bot h sk and power on/off key , and then the source radio is turned on with red led flashing once. turn on the target radio directly. status of the source radio (after target radio is turned on and cloning cable is connected, press ptt of source radio to b egin cloning.) red led glows during cloning process. error occurs during cloning: a. user clone: once cloning begins, frequency band and model id will be checked. led glows orange for 2 seconds and then goes out to indicate a failed check. if the check i s successfully carried out but error occurs during cloning, led will keep flashing orange until you press any key other than the power on/off key to cancel it. b. factory clone. if error occurs during cloning, led will keep flashing orange until you pres s any key other than the power on/off key to cancel it. once cloning is completed, green led solidly glows. red led will flash if battery runs low when the radio is in clone mode, while the radio will make no response if battery runs low during cloning pr ocess. status of the target radio led solidly glows green when cloning is in progress. green led goes out when cloning is completed. power on (to enter user mode) when the radio is turned on, an alert tone sounds and orange led flashes once. when the radio is currently on a blank channel, it sounds beep
tc - 320 44 6mhz service manual 5 tone continuously. power off when the radio is turned off, the power off alert tone is heard. low battery alert led flashes red, and a low - pitched tone sounds at intervals of 10 seconds. transmi tting red led solidly glows. when tot timer expires, the radio sounds beep tone continuously. a tot pre - alert tone sounds before tot timer expires. receiving led glows green when carrier is present. scan green led flashes once every 1 second, while s canning is in process. scan start alert (programmable by the dealer): a beep is heard. scan end alert (programmable by the dealer): a beep is heard. writing/reading data red led glows when reading data. green led glows when writing data. vox one bee p is heard when the vox feature is activated. two beeps are heard when the vox feature is disabled. channel selector knob rotate the knob to select your desired channel. power on/off key long press the power on/off key until an alert tone is heard to t urn the radio on/off. volume control keys [+] / [ - ] you may adjust the volume level through keys [+] / [ - ] . press [+] to increase or [ - ] to decrease the volume level. battery latch used to secure or remove the battery. audio accessory jack used to connec t audio accessories such as earpiece and microphone. mini usb jack to connect accessories such as programming cable, cloning cable and switching power.
tc - 320 44 6mhz service manual 6 software specifications description of features 1. channel capacity: 16 2. channel spacing: 12.5khz 3. channel scan 4. rx/tx status indication (red/green led) 5. ctcss/cdcss encode&decode (38 groups of ctcss, 83 groups of cdcss, and ctcss tail revert of 180 degrees.) 6. low battery alert 7. battery save 8. unlock detection and emergency alarm 9. two selectable squelch levels 10. moni tor 11. time - out timer (tot) 12. squelch tail elimination 13. pc programming (manual/ automatic adjustment) 14. busy channel lockout (transmission prohibited in busy status) 15. wired clone 16. battery strength indicator 17. manual adjustment 18. vox and three selectable sensitivi ty levels description of modes user mode it is a conventional communication mode. after the radio is turned on, it enters the user mode. pc programming mode the radio will enter pc programming mode through communication with pc programming software. in this mode, radio functions and adjustment parameters can be set through programming software (including user version and factory version). the operation procedures are as follows: 1. install pc programming software and its driver dedicated for tc - 320 bef ore your initial use.
tc - 320 44 6mhz service manual 7 2. connect the usb port of pc with the mini usb jack of the radio using a programming cable. 3. turn on the radio. 4. launch the programming software to perform reading or writing operation. note: 1. when reading/writing data is in progress, red/green led glows; when reading/writing data is completed, led goes out. 2. during the operation, if any abnormal situation occurs or no reply is given within a period, the reading/writing operation will fail and an error message window will pop up. wired clone mode 1. description wired clone mode is an independent mode. to access other modes, you must restart the radio. wired clone mode covers user clone mode and factory clone mode. 1.1 user clone mode: connect two radios using a clone ca ble. hold down both sk and power on/off key of the source radio, it will be turned on and will enter user clone mode after 2 seconds. the target radio can be directly turned on to enter the mode. in this mode, parameter data stored in eeprom of the source radio will be cloned to eeprom of the target radio. the data transferred only covers channel data and common parameters, excluding adjustment data, version and serial no. of the model. 1.2 factory clone mode: connect two radios using a clone cable. hold do wn both sk and power on/off key of the source radio, it will be turned on and will enter user clone mode by default after 2 seconds. press sk afterwards to switch to factory clone mode. the target radio can be directly turned on to enter the mode. the data transferred covers all data in eeprom other than serial no, with flag of manual adjustment switch included. 2. process process of wired clone: 2.1 red led flashes once after the source radio enters wired clone mode. press ptt to clone data to the targe t radio. 2.2 during communication, the source radio glows red led, and the target radio glows green led. when communication ends, the source radio glows green led and led of the target radio
tc - 320 44 6mhz service manual 8 goes out, which indicates both radios are ready for another clo ning. 2.3 if any abnormal situation occurs during communication, the source radio will flash orange led and will stop communication for another cloning. 2.4 when the communication ends, the source radio goes back to standby status. press ptt again to be gin another cloning. manual adjust mode hold down ptt, sk and power on/off key to turn the radio on and to enter manual adjust mode. (note: this operation is subject to the option panel test mode in the programming software. when this option is unchecked , the radio will be unable to enter the adjustment mode. it helps avoid change of parameters and degradation of radio performance caused by user?s misoperations. ) keep this option unchecked after values are well adjusted from factory, to avoid any unexpec ted change of values . the adjustment values can be reset and changed in factory mode only. description of adjustment: 1. to enter manual adjust mode hold down ptt, sk and power on/off key until the radio is turned on and orange led glows, the radio will enter adjust mode. when the keys are released, the radio will enter item n of tx group (n depends on the position where the channel selector knob locates). red led glows for adjustment of tx group items and green led glows for adjustment of rx group ite ms. 2. to switch between tx group and rx group this operation is done through the channel selector knob. red led solidly glows when adjusting items in tx group. green led solidly glows when adjusting items in rx group. 3. to switch between items of tx g roup/rx group this operation is done through the channel selector knob. tx group: ch1 stands for tx low power, and ch3 - ch9 stand for tx high power, cdcss balance, cdcss deviation, ctcss deviation (low), ctcss deviation (medium), ctcss deviation (high), tx low voltage threshold and max. and deviation of tx audio respectivel y. red led solidly glows when adjusting items ch1 to ch9. rx group: ch10 to ch12 stand for sql on 5, sql off 5, and rx low voltage threshold respectively. green led solidly glows when adjusting items ch10 to ch12. ch13 to ch16 are invalid and carry no a djustment item.
tc - 320 44 6mhz service manual 9 4. to switch between wide and narrow bandwidth when adjusting a certain item, short press sk (orange led flashes indicating valid press) to switch between wide/narrow bandwidth. after this operation, the first frequency of current bandwidth is the frequency for adjustment by default. 5. to switch frequency short press (no longer than 1 second) ptt (green led flashes indicating valid press) to switch frequency one by one, under certain bandwidth and certain adjustment item. 6. to add/subtra ct adjustment value short press [+] under certain bandwidth and certain tuning item, and the adjustment value will increase in steps of 1; hold down [+] , and the adjustment value will keep increasing in steps of1. the adjustment value will remain unchanged once it reaches the allowed maximum value. short press [ - ] under certain bandwidth and certain tuning item, and the adjustment value will decrease in steps of 1; hold down [ - ] , and the adjustment value will keep decreasing in steps of1. the adjustment va lue will remain unchanged once it reaches the allowed minimum value. 7. measures on special items: tx group: ch8 is the tx low voltage threshold. these adjustment items are related to ad sampling. press [+] or [ - ] after entering the above item, to activat e ad sampling (including calculation) once. rotate the channel selector knob to save the current ad sampling value. if [+] and [ - ] are not pressed, neither the adjustment value will be updated, nor will ad sampling be activated. rx group: ch10 to ch12 sta nd for sql on 5, sql off 5, and rx low voltage threshold respectively. these adjustment items are related to ad sampling. press [+] or [ - ] after entering the above items, to activate ad sampling (including calculation) once. rotate the channel selector kno b to save the current ad sampling value. if [+] and [ - ] are not pressed, neither the adjustment value will be updated, nor will ad sampling be activated. 8. description of key - press: short press: key press no longer than 1 second; long press: key press t ime longer than 1 second.
tc - 320 44 6mhz service manual 10 circuit description 1. general diagram tx section: audio signal from mic is sent to the rf chip (u501) directly. in u501, the signal is amplitude limited and amplified, and then sent to the mcu chip (u601). the baseband signal pr ocessing circuit in u601 will convert the amplified audio signal to digital signal via a/d conversion, and then convert the digital signal to modulation signal via d/a conversion after processing such as filtering, signal compression, encryption, pre - empha sis, tx gain control and amplitude limiting is are completed. the modulation signal from mcu will pass through the low - pass filter circuit and then will go to vco for direct frequency modulation. the modulated carrier signal is converted to rf signal by the buffer amplifier (u501), and then enters front - stage power amplifier (q401) for amplification. the amplified rf signal will be further amplified by the pre - driver (q402) and final - stage power amplifier (q403), and then will enter low - pass filter circuit t hrough the switching diode (d401), and will be finally transmitted via antenna after ultroharmonics are removed. d402 and d501 compose the rx - tx switch circuit. rx section: desired and undesired rf signals received via the antenna are fed to the bandpass filter (sawf502) to filter out undesired out - of - band interference signal, and then amplified by the rf amplifier (u501). the amplified signal is then fed to the bandpass filter (sawf503) to filter out undesired out - of - band interference signal. the desired rf signal is mixed with the first local oscillator signal (output
tc - 320 44 6mhz service manual 11 from vco) by q505. the newly generated signal is processed by the crystal filter (xf501) to get the first if signal (desired signal). after being amplified by q504, this if signal enters the rf chip (u501), and is mixed with the second local oscillator signal to generate the second if signal. the second if signal is demodulated by u501 to output audio signal, which is sent to mcu for a/d conversion and filtering. afterwards, the audio signal is divided into two flows. one flow is processed by ctcss/cdcss decoder; the other is restored to audio signal through filtering, de - emphasis, decoding, signal expansion and d/a conversion. then the restored audio signal is amplified by the audio power amp lifier (u301) to drive the speaker directly. power supply section: the 3.7v battery voltage is converted to two flows of 3.0v dc voltage by the ldo module (u602). one flow supplies 3.0v vcc for the cpu; the other outputs 3.0v v - save voltage, which goes th rough q604 and q601 respectively to supply, under the control tx - ctrl, 3.0v vt for tx circuit. the v - save voltage also goes through q602 to supply 3.0v vr for rx circuit. signaling encode: signaling encode signal output from the port mcu qt_out is divided into two flows. one flow goes through rc network to modulate the pll reference frequency oscillator; the other goes through qt - mod to modulate the vco. 2. realization methods of basic functional modules 2.1 hf section 2.1.1 block diagram of pll circuit qt_out q103 d105 v_save q101 q102 r103 ld c132 u501 v_save d102 r/t d103 d101 vco in cp xt101 loop filter sw vco mod ripple filter
tc - 320 44 6mhz service manual 12 pll circuit generates rf carrier signal for tx and the first local oscillator signal for rx. step frequency of the pll circuit is 6.25 khz, 10.0 khz or 12.5 khz. in u501, the 21.25mhz reference oscillator signal is divided into 6.25 khz, 10.0 khz or 12.5 k hz reference frequencies via a fixed counter in pll. the signal output from the vco (tx/rxvco) enters pll and is processed by the buffer amplifier. the amplified signal is further processed in pll by the variable frequency - divider. then the signal is compa red with the reference frequency in the phase detector (pd) of pll. signal generated from pd passes through a low - pass filter, and then is sent to the varactors (d101 and d102) of vco so as to control output frequency. the signal buffer amplified by pll al so serves as the first local oscillator signal for both tx and rx. the q103 switch controls connection status of d105 so as to switch between rx vco and tx vco. when r/t is at high level, tx vco is valid; when r/t is at low level, rx vco is valid. in case pin ld of u501 is at low level, unlock status is valid. when this status is detected by the microprocessor, transmit/receive operations are prohibited. 2.1.2 block diagram of rf power amplifier w402 antenna 1 v_bat r421 r420 r419 vt q405 lpf rf amp apc rf amp pre amp apc sw sw q404 tx out u401 q401 q402 q403 the modulated carrier signal output from vco is pre - ampl ified by u501, and then is further amplified by the front - stage amplifier q401. driver - stage amplifier q402 and final - stage amplifier q403 respectively. afterwards, the amplified rf signal enters the low - pass filter (lpf) circuit through diode d401, and th en is transmitted via the antenna after ultroharmonics are removed. d402 and d501 compose the rx - tx switch circuit. apc circuit is composed of q404, q405 and u401. u401 controls the bias voltage at the gates of q402 and q403, to control tx current and to further regulate power.
tc - 320 44 6mhz service manual 13 2.1.3 block diagram of rx circuit desired and undesired rf signals received via the antenna are fed to the saw filter to filter out undesired out - of - band interference signal. then the desired rf signal is amplified by q506 and e nters u501, where it is amplified by the high - frequency low - noise amplifier. afterwards, the amplified signal goes through the bandpass filter again to filter out undesired out - of - band interference signal. desired rf signal is mixed with the first local os cillator signal (output from vco) by q505, to output the first if signal (21.7mhz), which is processed by the if filter and if amplifier q504. afterwards, it is sent to the if processing circuit of u501. in u501, this first if sig nal is mixed with the second local oscillator signal to generate the second if signal. then the second if signal is demodulated by u501 to output audio signal, which is sent to mcu for a/d conversion and filtering. afterwards, the audio signal is divided i nto two flows. one flow is processed by ctcss/cdcss decoder; the other is restored to audio signal through filtering, de - emphasis, decoding, signal expansion and d/a conversion. then the restored audio signal is amplified by the audio power amplifier ic (u 301) to drive the speaker directly. 2.2 mcu control, signal processing and audio power amplification circuit diagram of this section is shown as below:
tc - 320 44 6mhz service manual 14 r602 amp r603 s a v e r e s e t b302 speaker + 1 - 2 b303 mic + 1 - 2 on/off key sw up dow af_outp rfc apc qt_out x601 t x _ c t l q602 u601 d601 led 1 2 d602 led 1 2 q201 q202 u301 ld v_bat busy(sql) b a t data g601 battery 1 2 ck stb demod reset apa en mic in mod out r/t ch sw vcc v_save q601 vt u605 vr j202 ext ptt ext mic q604 j201 u603 s d a s c l sw t_led r_led ec0 ec1 sw ec2 ec3 ptt dc-dc mon txd rxd eeprom u602 2.2.1 mcu control circuit mcu control circuit is composed of mcu, eeprom, lcd (exclusive for tc - 320 ), keys, etc. this section has the following functions: to initialize data of the radio and save data to eeprom; to drive lcd to display some user set information and status; to detect battery voltage and signals from external keys, ld and vox - det, and to make response; to transmit required data to pll based on the channel encoding status; to switch and control rx/tx based on the input ptt signal; to switch the squelch circuit on/off based on the input signaling decode signal and squelch level signal; to co ntrol circuits of high/low power switch, audio power amplifier, vco power supply, rx power supply and tx power supply; (for programming) to communicate with pc via rxd/txd based on the rs232 protocol, and transmit/receive data to/from pc. 2.2.2 signal proc essing section 2.2.2.1 tx baseband processing the audio signal input from mic enters u601, and is then converted into digital signal by analog - to - digital conversion. afterwards, the signal is divided by the digital low - pass filter into 2 flows. one flow se rves as the signal of vox detection; the other is processed by agc, compandor, high - pass filter, encryption and pre - emphasis, mixed with dtmf signal from mcu, converted to baseband signal via digital - to - analog conversion to output. then the signal is proce ssed by the active low - pass filter, and sent to the vco for modulation.
tc - 320 44 6mhz service manual 15 2.2.2.2 rx baseband processing after entering u601, the demod signal derived from if demodulation is converted to digital signal via analog - to - digital conversion (adc), and then is se nt to the digital low - pass filter. the signal is divided into 2 flows. one flow is processed by ctcss/cdcss decoder; the other is processed by high - pass filter, and then is subject to de - emphasis, decryption, signal expansion and dtmf demodulation and etc, and finally digital - to - analog conversion to output audio signal. 2.2.3 audio power amplifier the audio signal output from u601 is amplified by the audio power amplifier (u301) to drive the speaker directly. 2.3 power supply processing block diagram of power supply circuit is shown as below: s a v e q604 t x _ c t l q601 g601 battery 1 2 vcc v_save q602 vr vt sw sw dc-dc u602 power supply section: the 3.7v battery voltage is converted to two flows of 3.0v dc voltage by u602. one flow supplies 3.0v vcc for the cpu; the other outputs 3.0v v - save, which goes through q601, q602 and q604 re spectively to supply, under the control tx - ctrl, vt for tx circuit and vr for rx circuit. u602 also supplies the pll circuit with voltage v - save.
tc - 320 44 6mhz service manual 16 cpu pins pin no. port pin name i/o function 1 nc / / / 2 nc / / / 3 nc / / / 4 nc / / / 5 nc / / / 6 txd txd o uart txd 7 rxd rxd i uart rxd 8 p60 apa_en o control speaker; h: unmute, l: mute 9 p61 save_ctl o control power save; in non - power - save status, it is at high level. 10 p62 ext mic i check mic connection (valid for high level) 11 p63 ext ptt i ptt key on the earpiece (valid for high level) 12 p64 red led o red led 13 p65 green led o greed led 14 p66 reserve o reserved 15 p67 reserve o reserved 16 vssd gnd s ground power supply for digital circuit 17 vddd vcc 3.0v s power supply for digital circuit 18 p50/int0 vol+ i to increase the volume 19 p51/int1 vol - i to decrease the volume 20 p52/int2 reserve o reserved 21 p53/int3 /power on/off i radio on/off 22 p54/int4 sk i programmable function key (side key) (valid for low level), external pull - up resistor connected 23 p55/int5 ptt i ptt key (valid for low level), external pull - up resistor connected 24 p56/int6 reserve o reserved 25 p57/int7 reserve o reserved 26 vdd_cld vcc 3.0v s power supply for digit al pa 27 cld_outp cld_outp o lineout output; positive output of digital pa 28 vss_cld gnd s ground power supply for digital pa
tc - 320 44 6mhz service manual 17 29 cld_outm reserve o negative output of digital pa 30 vdd_cld vcc 3.0v s power supply for digital pa 31 p77 rf_ctrl o cont rol rx frequency band; valid for high level (high frequency band); low level (low frequency band) 32 p76/dac1 apc da control transmit power 33 p75/vref vcc(3.0v) i input of reference voltage of adc and dac pin 34 p74/dac0 qt_out da ctcss/cdcss outp ut 35 p73/ad3 reserve ad reserved 36 vssa gnd s ground power supply for analog circuit 37 vdda vcc 3.0v s power supply for analog circuit 38 p72/ad2 reserve ad reserved 39 p71/ad1 sql ad detect noise 40 p70/ad0 bat_det ad detect battery strength 41 xtal0 osc0 for 32.678khz main crystal oscillator 42 xtal1 osc1 43 pll_cap pll_cap for pll exte rnal capacitor (10nf) 44 nc / / / 45 nc / / / 46 nc / / / 47 nc / / / 48 nc / / / 49 p03/com3 reserve o reserved 50 p02/com2 reserve o reserved 51 p01/com1 reserve o reserved 52 p00/com0 reserve o reserved 53 p10/seg0 reserve o reserved 54 p11/s eg1 reserve o reserved 55 p12/seg2 reserve o reserved 56 p13/seg3 reserve o reserved 57 p14/seg4 reserve o reserved 58 p15/seg5 reserve o reserved 59 p16/seg6 reserve o reserved 60 p17/seg7 reserve o reserved
tc - 320 44 6mhz service manual 18 61 p20/seg8 en0 i to detect input from encoder switch 62 p21/seg9 en1 i 63 p22/seg10 en2 i 64 p23/seg11 en3 i 65 p24/seg12 reserve o reserved 66 p25seg13 reserve o reserved 67 p26/seg14 reserve o reserved 68 p27/seg15 reserve o reserved 69 p30/seg16 reserve o reserved 70 p31/seg17 r eserve o reserved 71 nc / / / 72 nc / / / 73 nc / / / 74 nc / / / 75 nc / / / 76 p32/seg18 reserve o reserved 77 p33/seg19 reserve o reserved 78 p34/seg20 reserve o reserved 79 p35/seg21 reserve o reserved 80 p36/seg22 reserve o reserved 81 p37/ seg23 reserve o reserved 82 p40/seg24 reserve o reserved 83 p41/seg25 scl o eeprom clock, external pull - up resistor connected 84 p42/seg26 sda o eeprom data, external pull - up resistor connected 85 p43/seg27 ld i to detect pll circuit unlock (h: lock; l : unlock), external pull - up resistor connected 86 p44/seg28 data o pll data 87 p45/seg29 ck o pll clock 88 p46/seg30 stb o pll enable 89 vssd gnd s ground power supply for digital circuit 90 vddd vcc 3.0v s power supply for digital circuit 91 sw_p0 r/t o rx/tx control, h: rx; l: tx (switch to vco) 92 sw_p1 tx_ctrl o control power supply for tx (transmit at high level)
tc - 320 44 6mhz service manual 19 93 reset reset i reset input 94 vssa gnd s ground power supply for analog circu it 95 vdda vcc 3.0v s power supply for analog circuit 96 bg_ref o to output reference voltage 97 mic_in mic_in i microphone input 98 demode demode i to input baseband signal (audio and ctcss/cdcss ) 99 modout modout o to output baseband signal (au dio and ctcss/cdcss ) 100 nc / / / tc - 320 446mhz parts list 1
tc - 320 44 6mhz service manual 20 no. part no. description qty. ref no. print no. 1 3001050000000 chip resistor 0402 0 j 1/16w (rohs) 1 r222 t3g 2 3001050000000 chip resistor 0402 0 j 1/16w (rohs) 1 r223 t3g 3 3001050000000 chip resistor 0402 0 j 1/16w (rohs) 1 l510 b2h 4 3001050000000 chip resistor 0402 0 j 1/16w (rohs) 1 r314 t3b 5 3001050000000 chip resistor 0402 0 j 1/16w (rohs) 1 r527 b2h 6 3001051000020 chip resistor 0402 10 f 1/16w (rohs) 1 r101 b4h 7 3001051000020 chip resistor 0402 10 f 1/16w (rohs) 1 r111 b4e 8 3001051000020 chip resistor 0402 10 f 1/16w (rohs) 1 r119 b3f 9 3001051000020 chip resistor 0402 10 f 1/16w (rohs) 1 r311 t3a 10 3001051000020 chip resistor 0402 10 f 1/16w (rohs) 1 r516 b3i 11 3001051000020 chip resistor 0402 10 f 1/16w (rohs) 1 r530 b2g 12 3001051010040 chip resistor 0402 100 f 1/16w (rohs) 1 r604 t2e 13 3001051010040 chip resistor 0402 100 f 1/16w (rohs) 1 r614 t4e 14 3001051010040 chip resistor 0402 100 f 1/16w (rohs) 1 r621 t4e 15 3001051010040 chip resistor 0402 100 f 1/16w (rohs) 1 r623 t4e 16 3001051010040 chip resistor 0402 100 f 1/16w (rohs) 1 r518 b3h 17 3001051020000 chip resistor 0402 1k f 1/16w (rohs) 1 r109 b4e 18 3001051020000 chip resistor 0402 1k f 1/16w (rohs) 1 r114 b3e 19 3001051020000 chip resistor 0402 1k f 1/16w (rohs) 1 r207 t2g 20 3001051020000 chip resistor 0402 1k f 1/16w (rohs) 1 r214 t3d 21 3001051020000 chip resistor 0402 1k f 1/16w (rohs) 1 r309 t4d 22 3001051020000 chip resistor 0402 1k f 1/16w (rohs) 1 r613 t2g 23 3001051020000 chip resistor 0402 1k f 1/16w (rohs) 1 r507 b3h 24 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r107 b4e 25 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r116 b3e 26 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r120 b3f 27 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r210 t5e 28 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r219 t2d 29 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r409 t2b 30 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r428 t2b 31 3001051030000 chip resistor 0402 10k j 1/16w (rohs) 1 r301 t3a 32 3001051040000 chip resistor 0402 100k f 1/16w (rohs) 1 r113 b3e 33 3001051040000 chip resistor 0402 100k f 1/16w (rohs) 1 r213 t3d 34 3001051050000 chip resistor 0402 1m f 1/16w (rohs) 1 r218 t2d 35 3001051050000 chip resistor 0402 1m f 1/16w (rohs) 1 r405 t2b 36 3001051050000 chip resistor 0402 1m f 1/16w (rohs) 1 r501 b3h 37 3001051220000 chip resistor 0402 1.2k j 1/16w (rohs) 1 r220 t4e 38 3001051230000 chip resistor 0402 12k j 1/16w (rohs) 1 r224 t3g 39 3001051230000 chip resistor 0402 12k j 1/16w (rohs) 1 r528 b2g 40 3001051230000 chip resistor 0402 12k j 1/16w (rohs) 1 r208 t4d 41 3001051530000 chip resistor 0402 15k j 1/16w (rohs) 1 r406 t2a 42 3001051540000 chip resistor 0402 150k f 1/16w (rohs) 1 r422 t3a 43 3001051540000 chip resistor 0402 150k f 1/16w (rohs) 1 r423 t3b 44 3001051540000 chip resistor 0402 150k f 1/16w (rohs) 1 r424 t3b 45 3001051540000 chip resistor 0402 150k f 1/16w (rohs) 1 r425 t3b 46 3001051540000 chip resistor 0402 150k f 1/16w (rohs) 1 r426 t3a 47 3001051540000 chip resistor 0402 150k f 1/16w (rohs) 1 r427 t2a 48 3001052200000 chip resistor 0402 22 j 1/16w (rohs) 1 r429 b2f 49 3001052220000 chip resistor 0402 2.2k j 1/16w (rohs) 1 r110 b4e TC-320 446mhz parts list 1
tc - 320 44 6mhz service manual 21 50 3001052220000 chip resistor 0402 2.2k j 1/16w (rohs) 1 r202 t2d 51 3001052220000 chip resistor 0402 2.2k j 1/16w (rohs) 1 r216 t3d 52 3001052220000 chip resistor 0402 2.2k j 1/16w (rohs) 1 r306 b3h 53 3001052220000 chip resistor 0402 2.2k j 1/16w (rohs) 1 r407 t2b 54 3001052220000 chip resistor 0402 2.2k j 1/16w (rohs) 1 r615 t3h 55 3001052230010 chip resistor 0402 22k j 1/16w (rohs) 1 r215 t3d 56 3001052230010 chip resistor 0402 22k j 1/16w (rohs) 1 r312 b4h 57 3001052240010 chip resistor 0402 220k f 1/16w (rohs) 1 r602 t2e 58 3001052240010 chip resistor 0402 220k f 1/16w (rohs) 1 r603 t2e 59 3001052710010 chip resistor 0402 270 j 1/16w (rohs) 1 r115 b3e 60 3001052710010 chip resistor 0402 270 j 1/16w (rohs) 1 r505 b2i 61 3001052710010 chip resistor 0402 270 j 1/16w (rohs) 1 r506 b3h 62 3001052720010 chip resistor 0402 2.7k f 1/16w (rohs) 1 r502 t3h 63 3001052730010 chip resistor 0402 27k f 1/16w (rohs) 1 r408 t2a 64 3001052740000 chip resistor 0402 270k j 1/16w (rohs) 1 r303 b3h 65 3001053310010 chip resistor 0402 330 j 1/16w (rohs) 1 r404 b2e 66 3001053320000 chip resistor 0402 3.3k j 1/16w (rohs) 1 r203 t4e 67 3001053320000 chip resistor 0402 3.3k j 1/16w (rohs) 1 r204 t4e 68 3001053320000 chip resistor 0402 3.3k j 1/16w (rohs) 1 r305 b4h 69 3001053320000 chip resistor 0402 3.3k j 1/16w (rohs) 1 r307 b4h 70 3001053320000 chip resistor 0402 3.3k j 1/16w (rohs) 1 r401 b2f 71 3001053320000 chip resistor 0402 3.3k j 1/16w (rohs) 1 r402 b2e 72 3001053330000 chip resistor 0402 33k f 1/16w (rohs) 1 r125 b4h 73 3001053920010 chip resistor 0402 3.9k j 1/16w (rohs) 1 r606 t4d 74 3001053920010 chip resistor 0402 3.9k j 1/16w (rohs) 1 r633 t3g 75 3001053930000 chip resistor 0402 39k j 1/16w (rohs) 1 r302 t3a 76 3001054790000 chip resistor 0402 4.7 j 1/16w (rohs) 1 r308 t3a 77 3001054790000 chip resistor 0402 4.7 j 1/16w (rohs) 1 r310 t3a 78 3001054790000 chip resistor 0402 4.7 j 1/16w (rohs) 1 r403 b2e 79 3001054790000 chip resistor 0402 4.7 j 1/16w (rohs) 1 r525 b2g 80 3001054700000 chip resistor 0402 47 j 1/16w (rohs) 1 r123 b3f 81 3001054700000 chip resistor 0402 47 j 1/16w (rohs) 1 r618 t4g 82 3001054700000 chip resistor 0402 47 j 1/16w (rohs) 1 r619 t3g 83 3001054710000 chip resistor 0402 470 j 1/16w (rohs) 1 r201 t2d 84 3001054720000 chip resistor 0402 4.7k j 1/16w (rohs) 1 r112 b3e 85 3001054720000 chip resistor 0402 4.7k j 1/16w (rohs) 1 r206 t3g 86 3001054720000 chip resistor 0402 4.7k j 1/16w (rohs) 1 r608 t4b 87 3001054720000 chip resistor 0402 4.7k j 1/16w (rohs) 1 r622 t3d 88 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r103 b4g 89 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r106 b3e 90 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r121 t4f 91 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r205 t4d 92 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r217 t3d 93 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r313 b4h 94 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r607 t3g 95 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r610 t4b 96 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r611 t4b 97 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r612 t4b 98 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r616 t4g 99 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r617 t4g 100 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r620 t4b 101 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r624 t4e 102 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r630 t2g 103 3001054730000 chip resistor 0402 47k j 1/1w (rohs) 1 r631 t3h 104 3001054740000 chip resistor 0402 470k j 1/16w (rohs) 1 r212 t5e
tc - 320 44 6mhz service manual 22 105 3001054740000 chip resistor 0402 470k j 1/16w (rohs) 1 r517 b3h 106 3001055620000 chip resistor 0402 5.6k j 1/16w (rohs) 1 r211 t4e 107 3001055620000 chip resistor 0402 5.6k j 1/16w (rohs) 1 r117 b3f 108 3001056820000 chip resistor 0402 6.8k j 1/16w (rohs) 1 r529 b2g 109 3001056830000 chip resistor 0402 68k j 1/16w (rohs) 1 r102 b4h 110 3001056830000 chip resistor 0402 68k j 1/16w (rohs) 1 r124 b4f 111 3001056830000 chip resistor 0402 68k j 1/16w (rohs) 1 r304 b4h 112 3001057520000 chip resistor 0402 7.5k j 1/16w (rohs) 1 r118 b3e 113 3001058200000 chip resistor 0402 82 f 1/16w (rohs) 1 r526 b3g 114 3001058220000 chip resistor 0402 8.2k j 1/16w (rohs) 1 r209 b3f 115 3001058220000 chip resistor 0402 8.2k j 1/16w (rohs) 1 r606 t4c 116 3001058230000 chip resistor 0402 82k j 1/16w (rohs) 1 r632 t3g 117 3001060000000 chip resistor 0603 0 j 1/10w (rohs) 1 l105 b3f 118 3001060000000 chip resistor 0603 0 j 1/10w (rohs) 1 d503 b1f 119 3001060000000 chip resistor 0603 0 j 1/10w (rohs) 1 d505 b1h 120 3001061010000 chip resistor 0603 100 j 1/10w (rohs) 1 r418 t2b 121 3001061010000 chip resistor 0603 100 j 1/10w (rohs) 1 r605 t3a 122 3001061230000 chip resistor 0603 12k j 1/10w (rohs) 1 r417 b2c 123 3001061530000 chip resistor 0603 15k d 1/10w (rohs) 1 r416 b2d 124 3001062230000 chip resistor 0603 22k j 1/10w (rohs) 1 r411 b2d 125 3001062230000 chip resistor 0603 22k j 1/10w (rohs) 1 r412 b2d 126 3001063310010 chip resistor 0603 330 j 1/10w rct03331 (rohs) 1 r609 t5d 127 3001064700000 chip resistor 0603 47 j 1/10w (rohs) 1 r410 b2d 128 3001064700000 chip resistor 0603 47 j 1/10w (rohs) 1 r415 b3c 129 3001064710000 chip resistor 0603 470 j 1/10w (rohs) 1 r634 b5a 130 3001064710000 chip resistor 0603 470 j 1/10w (rohs) 1 r609 b5a 131 3001066810010 chip resistor 0603 680 j 1/10w (rohs) 1 r625 t4a 132 3099080398000 chip resistor 1206 0.39 j 1/4w (rohs) 1 r419 t3b 133 3099080398000 chip resistor 1206 0.39 j 1/4w (rohs) 1 r420 t3b 134 3099080398000 chip resistor 1206 0.39 j 1/4w (rohs) 1 r421 t3b 135 3005051020010 resistor array 0402 1k*4 j 1/16w (rohs) 1 rn101 t4f 136 3002991030150 trimmer resistor (2.7*2.0*0.9) 10k 30% (rohs) 1 vr101 b4h 137 3002991030150 trimmer resistor (2.7*2.0*0.9) 10k 30% (rohs) 1 vr601 t3g 138 3101050390000 chip capacitor 0402 0.3pf b 50v hi-q (rohs) 1 c534 b3h 139 3101050590010 chip capacitor 0402 0.5pf b 50v (rohs) 1 c109 b3e 140 3101050590010 chip capacitor 0402 0.5pf b 50v (rohs) 1 c144 b3f 141 3101050100010 chip capacitor 0402 1pf b 50v hi-q (rohs) 1 c527 t2h 142 3199051590000 chip capacitor 0402 1.5pf b 50v hi-q (rohs) 1 c431 b3a 143 3101050200010 chip capacitor 0402 2pf b 50v (rohs) 1 c110 b3e 144 3101050200010 chip capacitor 0402 2pf b 50v (rohs) 1 c401 b2f 145 3101050200010 chip capacitor 0402 2pf b 50v (rohs) 1 c531 t2i 146 3101050200010 chip capacitor 0402 2pf b 50v (rohs) 1 c532 t3i 147 3101050200010 chip capacitor 0402 2pf b 50v (rohs) 1 c433 b3a 148 3101050200010 chip capacitor 0402 2pf b 50v (rohs) 1 c428 b3a 149 3199052290000 chip capacitor 0402 2.2pf b 50v hi-q (rohs) 1 c502 b2b 150 3101052490010 chip capacitor 0402 2.4pf b 50v (rohs) 1 c130 b3e 151 3101052490010 chip capacitor 0402 2.4pf b 50v (rohs) 1 c432 b3a 152 3101050300000 chip capacitor 0402 3pf b 50v (rohs) 1 c434 b3a 153 3101053690000 chip capacitor 0402 3.6pf b 50v (rohs) 1 c421 b3b 154 3101053690000 chip capacitor 0402 3.6pf b 50v (rohs) 1 c501 b2b 155 3101050400010 chip capacitor 0402 4pf b 50v (rohs) 1 c148 b3e 156 3101050400010 chip capacitor 0402 4pf b 50v (rohs) 1 c545 b3h 157 3199054790000 chip capacitor 0402 4.7pf c 50v (rohs) 1 c430 b3a 158 3101050600010 chip capacitor 0402 6pf b 50v (rohs) 1 c439 b2f 159 3101050700010 chip capacitor 0402 7pf b 50v (rohs) 1 c149 b4f
tc - 320 44 6mhz service manual 23 160 3101050700010 chip capacitor 0402 7pf b 50v (rohs) 1 c406 b2f 161 3101050900000 chip capacitor 0402 9pf b 50v (rohs) 1 c112 b3f 162 3101051000020 chip capacitor 0402 10pf j 50v (rohs) 1 c103 b5g 163 3101051000020 chip capacitor 0402 10pf j 50v (rohs) 1 c104 b4g 164 3101051000020 chip capacitor 0402 10pf j 50v (rohs) 1 c107 b3e 165 3101051000020 chip capacitor 0402 10pf j 50v (rohs) 1 c211 t4e 166 3101051200020 chip capacitor 0402 12pf j 50v (rohs) 1 c544 b3h 167 3101051200020 chip capacitor 0402 12pf j 50v (rohs) 1 c423 b3b 168 3101051500020 chip capacitor 0402 15pf j 50v (rohs) 1 c106 b4e 169 3101051500020 chip capacitor 0402 15pf j 50v (rohs) 1 c638 t2e 170 3101051500020 chip capacitor 0402 15pf j 50v (rohs) 1 c639 t2f 171 3101051500020 chip capacitor 0402 15pf j 50v (rohs) 1 c530 t2h 172 3101052200010 chip capacitor grm36c0g220j50pt 22pf j 50v (rohs) 1 c517 b2g 173 3101052400010 chip capacitor 0402 24pf j 50v j (rohs) 1 c538 b3i 174 3101053300000 chip capacitor 0402 33pf j 50v (rohs) 1 c526 b3h 175 3101053900000 chip capacitor 0402 39pf j 50v (rohs) 1 c418 b3b 176 3101054700010 chip capacitor 0402 47pf j 50v (rohs) 1 c404 b2e 177 3101055600000 chip capacitor 0402 56pf j 50v (rohs) 1 c415 b3d 178 3101055600000 chip capacitor 0402 56pf j 50v (rohs) 1 c306 b4h 179 3101058200000 chip capacitor 0402 82pf j 50v (rohs) 1 c529 t3h 180 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c117 b3f 181 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c119 t4f 182 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c121 t5f 183 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c122 b3f 184 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c124 t5f 185 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c125 t5f 186 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c131 b4e 187 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c202 b2e 188 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c407 b3f 189 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c411 b2f 190 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c614 t3g 191 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c629 t4e 192 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c523 b2h 193 3101051010030 chip capacitor 0402 100pf j 50 (rohs) 1 c512 b2b 194 3101051810000 chip capacitor 0402 180pf j 50v (rohs) 1 c507 b2g 195 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c142 b3e 196 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c147 b3f 197 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c150 b3f 198 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c209 t5d 199 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c307 b4h 200 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c308 b3h 201 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c309 b3h 202 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c403 t2b 203 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c405 b2e 204 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c416 b3d 205 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c424 b2d 206 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c426 t2b 207 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c440 b3b 208 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c443 t2b 209 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c444 t3b 210 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c445 t2a 211 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c446 t2b 212 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c447 t2b 213 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c504 b2g 214 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c524 b2h
tc - 320 44 6mhz service manual 24 215 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c601 t3a 216 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c611 t3e 217 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c622 t4g 218 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c623 t4a 219 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c624 t4b 220 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c625 t4a 221 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c626 t4b 222 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c631 t2e 223 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c632 t2d 224 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c633 t2c 225 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c636 t2e 226 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c641 t1b 227 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c644 t2d 228 3101054710010 chip capacitor 0402 470pf k 50v (rohs) 1 c542 b3h 229 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c102 b5g 230 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c105 b4e 231 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c120 b4h 232 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c126 b4h 233 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c133 b2e 234 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c139 b3e 235 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c141 b2e 236 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c145 b3e 237 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c216 t3d 238 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c219 t3d 239 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c412 b2d 240 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c413 b3d 241 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c417 b2c 242 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c425 b2b 243 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c427 b2b 244 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c539 b3i 245 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c541 b3h 246 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c546 b2g 247 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c604 b4c 248 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c605 t2e 249 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c608 t4c 250 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c616 t2g 251 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c617 t4c 252 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c619 t2h 253 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c620 t2h 254 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c640 t4c 255 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c648 t2g 256 3101051020010 chip capacitor 0402 1000pf k 50v (rohs) 1 c651 t4d 257 3101054720000 chip capacitor 0402 4700pf k 50v (rohs) 1 c310 b4h 258 3101054720000 chip capacitor 0402 4700pf k 50v (rohs) 1 c204 t4e 259 3101054720000 chip capacitor 0402 4700pf k 50v (rohs) 1 c647 t5e 260 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c138 b2e 261 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c437 b3b 262 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c438 t2a 263 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c540 b3i 264 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c607 t4c 265 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c635 t2e 266 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c637 t2f 267 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c645 t4b 268 3101051030020 chip capacitor 0402 0.01uf k 25v (rohs) 1 c646 t4b 269 3101052230000 chip capacitor 0402 0.022uf k 16v (rohs) 1 c212 t4e
tc - 320 44 6mhz service manual 25 270 3101052230000 chip capacitor 0402 0.022uf k 16v (rohs) 1 c642 t3g 271 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c101 b3f 272 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c123 b5h 273 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c127 b4g 274 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c134 b3e 275 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c135 b2f 276 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c146 b3f 277 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c217 t2d 278 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c218 t2d 279 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c304 t3a 280 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c311 t3a 281 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c312 t3a 282 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c313 t3a 283 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c408 b3f 284 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c422 t2b 285 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c436 b3b 286 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c441 t3b 287 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c520 b4h 288 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c528 t3h 289 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c603 b4c 290 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c536 b2g 291 3101051040060 chip capacitor 0402 0.1uf k 16v (rohs) 1 c220 t3d 292 3101052240010 chip capacitor 0402 0.22uf z 10v (rohs) 1 c118 b4g 293 3101052240010 chip capacitor 0402 0.22uf z 10v (rohs) 1 c208 t5d 294 3101052240010 chip capacitor 0402 0.22uf z 10v (rohs) 1 c213 t4e 295 3101052240010 chip capacitor 0402 0.22uf z 10v (rohs) 1 c215 b4f 296 3101052240010 chip capacitor 0402 0.22uf z 10v (rohs) 1 c519 t3h 297 3101053340010 capacitor 0402 0.33uf x5r k 6.3v (rohs) 1 c301 t3a 298 3101053340010 capacitor 0402 0.33uf x5r k 6.3v (rohs) 1 c316 t3b 299 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c203 t4e 300 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c207 t4e 301 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c315 b4h 302 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c547 b3h 303 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c627 t4e 304 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c628 t4e 305 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c630 t3e 306 3101051050000 chip capacitor 0402 1uf k 6.3v (rohs) 1 c634 t2e 307 3101061500010 chip capacitor 0603 15pf j 50v (rohs) 1 c419 b2b 308 3101061020000 chip capacitor 0603 1000pf k 50v (rohs) 1 c435 b2a 309 3101064730000 chip capacitor 0603 0.047uf k 16v (rohs) 1 c116 b5e 310 3101065630000 chip capacitor 0603 0.056uf k 50v (rohs) 1 c114 b4f 311 3101064740000 chip capacitor 0603 0.47uf k 25v (rohs) 1 c302 t3b 312 3101061050020 chip capacitor 0603 1uf k 25v (rohs) 1 c609 t4c 313 3101061050020 chip capacitor 0603 1uf k 25v (rohs) 1 c610 t4b 314 3101061050020 chip capacitor 0603 1uf k 25v (rohs) 1 c615 t2g 315 3101061050020 chip capacitor 0603 1uf k 25v (rohs) 1 c621 t2h 316 3101062250000 chip capacitor 0603 2.2uf k 10 (rohs) 1 c618 t4c 317 3104071050070 tantalum capacitor 0805 1uf m 16v (rohs) 1 c420 b2c 318 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c128 b4g 319 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c140 b3e 320 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c201 t2e 321 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c206 t4e 322 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c210 b3f 323 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c305 t3a 324 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c442 t3a
tc - 320 44 6mhz service manual 26 325 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c602 b5b 326 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c606 t5d 327 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c643 t4c 328 3104074750070 tantalum capacitor 0805 4.7uf m 10v (rohs) 1 c132 b4g 329 3104081550030 tantalum capacitor 1206 1.5uf m 16v (rohs) 1 c115 b5e 330 3102992000040 trimmer capacitor 3.2*2.5*1.25mm (rohs) 1 tc101 b3e 331 3210305479000 multi-layer chip inductor 0402 4.7nh (rohs) 1 l513 b1e 332 3210305829000 multi-layer chip inductor 0402 8.2nh (rohs) 1 l514 b3h 333 3210305150010 multi-layer chip inductor 0402 15nh (rohs) 1 l508 b3h 334 3210305150010 multi-layer chip inductor 0402 15nh (rohs) 1 l511 b3h 335 3210305150010 multi-layer chip inductor 0402 15nh (rohs) 1 l504 b2h 336 3210305220000 multi-layer chip inductor 0402 22nh (rohs) 1 l111 b4f 337 3210305220000 multi-layer chip inductor 0402 22nh (rohs) 1 l401 b2e 338 3210305220000 multi-layer chip inductor 0402 22nh (rohs) 1 l416 b2f 339 3210305270000 multi-layer chip inductor 0402 27nh (rohs) 1 l402 b2f 340 3210305330000 multi-layer chip inductor 0402 33nh (rohs) 1 l503 b2h 341 3210305390000 multi-layer chip inductor 0402 39nh (rohs) 1 l516 t2h 342 3212105470000 multi-layer chip inductor 0402 47nh (rohs) 1 l404 b3f 343 3210305101000 multi-layer chip inductor 0402 100nh (rohs) 1 l505 b3h 344 3210306229000 multi-layer chip inductor 0603 2.2nh (rohs) 1 r414 b3c 345 3210306479000 multi-layer chip inductor 0603 4.7nh lqg1 (rohs) 1 l405 b2d 346 3210306479000 multi-layer chip inductor 0603 4.7nh lqg1 (rohs) 1 l408 b3d 347 3213306561000 multi-layer chip inductor 0603 0.56uh (rohs) 1 l411 b2b 348 3213306102000 multi-layer chip inductor 0603 1uh mlf160 (rohs) 1 l110 b4g 349 3213306102000 multi-layer chip inductor 0603 1uh mlf160 (rohs) 1 l201 t4d 350 3213306222000 multi-layer chip inductor 0603 2.2uh mlf1 (rohs) 1 l509 b3h 351 3213306332000 multi-layer chip inductor 0603 3.3uh mlf1 (rohs) 1 l102 b4e 352 3213306332000 multi-layer chip inductor 0603 3.3uh mlf1 (rohs) 1 l103 b4e 353 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l101 b4e 354 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l106 b2e 355 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l107 b4h 356 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l108 b4g 357 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l109 b4h 358 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l417 b2e 359 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l602 t2e 360 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l603 t3d 361 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l605 t4e 362 3221506601000 chip ferrite bead 0603 600 25% (rohs) 1 l606 t4e 363 3221507600000 chip ferrite bead 0805 60 25% (rohs) 1 l410 b3b 364 3221507600000 chip ferrite bead 0805 60 25% (rohs) 1 l601 t3b 365 3221507600000 chip ferrite bead 0805 60 25% (rohs) 1 l607 t4b 366 3221507221000 chip ferrite bead 0805 220 25% (rohs) 1 l407 b3d 367 3231301250000 air-core inductor e2-0.30*1.2*5tl (rohs) 1 l406 b3d 368 3210108230010 bobbin inductor 1206 23nh lqw31 (rohs) 1 l104 b3e 369 3210209102010 bobbin inductor 1210 1uh lqh32m (rohs) 1 l415 b2a 370 3231351630000 air-core inductor e2-0.35*1.6*3tr (rohs) 1 l501 b2b 371 3231351640000 air-core inductor e2-0.35*1.6*4tl (rohs) 1 l412 b3a 372 3231351640000 air-core inductor e2-0.35*1.6*4tl (rohs) 1 l413 b3a 373 3231351640000 air-core inductor e2-0.35*1.6*4tl (rohs) 1 l414 b3a 374 3231351650000 air-core inductor e2-0.35*1.6*5tl (rohs) 1 l409 b3b 375 3304060300050 varactor hvc350btrf-e r (rohs) 1 d101 b4e 376 3304060300050 varactor hvc350btrf-e r (rohs) 1 d102 b4e 377 3304040200000 varactor bb179 sod523 p (rohs) 1 d103 b3e 378 3303020100020 switching diode ma2s11100l ss- (rohs) 1 d104 b3e 379 3303030800040 switching diode 1ss356 sod-323 35v 100ma (rohs) 1 d401 b2b
tc - 320 44 6mhz service manual 27 380 3303030800040 switching diode 1ss356 sod-323 35v 100ma (rohs) 1 d501 b2b 381 3303060300010 switching diode hvc131trf-e renesas (rohs) 1 d105 b3e 382 3307110100080 led kpt-1608sgc (rohs) 1 d601 t4a 383 3307110100080 led kpt-1608sgc (rohs) 1 d603 b5a 384 3307110100060 led kpt-1608surc (rohs) 1 d602 t4a 385 3307110100060 led kpt-1608surc (rohs) 1 d604 b5a 386 3309030600000 noise clipping diode rsa6.1en (rohs) 1 d605 t4b 387 3309030600000 noise clipping diode rsa6.1en (rohs) 1 d606 t4d 388 3399990000080 zener diode edzte616.8b sod-523 (rohs) 1 d506 t3i 389 3399990000080 zener diode edzte616.8b sod-523 (rohs) 1 d610 t4h 390 3399990000080 zener diode edzte616.8b sod-523 (rohs) 1 d402 b2d 391 3399990000080 zener diode edzte616.8b sod-523 (rohs) 1 d301 t3a 392 3399990000080 zener diode edzte616.8b sod-523 (rohs) 1 d607 b4c 393 3399990000080 zener diode edzte616.8b sod-523 (rohs) 1 d608 b4d 394 3411002000020 transistor 2sc5343eg (rohs) 1 q101 b2e 395 3404002000000 transistor prf957 (rohs) 1 q102 b3f 396 3403008000010 transistor dtc114ee(tl) (rohs) 1 q103 b2f 397 3403008000010 transistor dtc114ee(tl) (rohs) 1 q405 t2b 398 3403008000010 transistor dtc114ee(tl) (rohs) 1 q604 t2g 399 3401002000990 transistor 2sc5108-y(te85l (rohs) 1 q104 b4f 400 3401002000990 transistor 2sc5108-y(te85l (rohs) 1 q504 b3h 401 3418001000010 transistor at-41511-tr1g (rohs) 1 q503 b2h 402 3401001000490 transistor 2sa1832-gr(te85l (rohs) 1 q201 t3d 403 3503020000030 fet 2sk1824-t1-a (rohs) 1 q202 t2d 404 3408002000030 transistor 2sc4226-r24-a (rohs) 1 q401 b2f 405 3408002000030 transistor 2sc4226-r24-a (rohs) 1 q505 b3h 406 3502010000130 fet 2sk3078(te12l (rohs) 1 q402 b3d 407 3515990000000 fet rqa0002dnstb (rohs) 1 q403 b3c 408 3403007000020 transistor dta114ye(tl) (rohs) 1 q404 t2b 409 3410001000020 transistor 2sa1745 (rohs) 1 q601 t2g 410 3410001000020 transistor 2sa1745 (rohs) 1 q602 t2h 411 4301080000020 momentary contact switch skrtlae0 (rohs) 1 sw601 t3a 412 4301080000090 momentary contact switch skqmaqe010 (2.55n) (rohs) 1 sw604 t1b 413 4301080000090 momentary contact switch skqmaqe010 (2.55n) (rohs) 1 sw605 t1d 414 5205005000020 mini usb jack 5p (rohs) 1 j201 b4d 415 5205006000010 audio accessory jack lgk1503 (rohs) 1 j202 b4c 416 3602999000000 audio amplifier ap4890 btl 1w (rohs) 1 u301 t3a 417 3605008005070 dual operational amplifier njm2904v j (rohs) 1 u401 t2b 418 41003201001b0 rf pcb (with ic jtb32304) b (rohs) 1 u501 b3g 419 3610999000060 scm srt3210 100pin (rohs) 1 u601 t3f 420 3609049000010 ic ldo regulator rt9011pp (rohs) 1 u602 t4c 421 3612031000510 memory at24c16an-10su-2 (rohs) 1 u603 t4g 422 3615042000010 charge management ic (rohs) 1 u604 t4d 423 3609006000000 reset ic r3112q271a-tr-f (rohs) 1 u605 t5e 424 3701212540030 tcxo 21.25mhz (rohs) 1 xt101 b4g 425 41003203000g0 pcb fr4 4l 4p (rohs) 1 pcb 426 6201648000000 vco shielding mask 0.30mm 00 (rohs) 1 427 6201651000000 filter shielding mask 0.20mm 00 (rohs) 1 428 7000183000000 heat-sinking module 3*5mm 00 (rohs) 1 429 3701327610060 clock crystal 32.768khz ssp-t7f 12.5pf 20ppm (rohs) 1 x601 t2f
tc - 320 44 6mhz service manual 28 adjustment description parts overview (1)ptt (push - to - talk) key (2) sk (programmable key) (3) speaker (4) volume control keys [+] / [ - ] (5) microphone (6) nameplate (7) charging terminal (8) antenna (9) power on/off key (10) c hannel/status indicator (11) channel selector knob (12) charge indicator (13) accessory jack cover (14) audio accessory jack (15) mini usb jack (16) strap hole (17) screw of belt clip (18) belt clip (19) rear cover (20) battery latch
tc - 320 44 6mhz service manual 29 required test instruments: radio communication test set 1 set 10v/3a regulated dc power supply 1 set digital voltmeter 1 set ammeter 1 set preparations: place the board to be tested on the test fixture (please ensure good connecti on between each test point and the fixture), and connect the board to a power supply with dc voltage of 3.8v. wired clone 1. instructions: (1) connect two radios with a cloning cable and power on the source radio while holding down sk on it. the radio wi ll enter wired clone mode in 2 seconds. then power on the target radio to enter normal mode; (2) in wired clone mode, press sk on the source radio to switch between user clone mode and factory clone mode (check factory clone mode when programming, or you w ill fail to switch.); (3) press ptt key to clone data to the target radio. you can clone the data to multiple target radios in the same way. 2. led indications: (1) during the cloning process, led solidly glows red; once it finishes, led will solidly gl ow green. (2) clone errors: a. user clone. once clone begins, frequency band and model id will be checked. led glows orange for 2 seconds and then goes out to indicate a failed check. if the check is successfully carried out but error data clone occurs, led will flash orange. in this situation, press any key other than the radio on/off key to turn it off. b. factory clone. if error data clone occurs, led will flash orange. in this situation, press any key other than the radio on/off key to turn it off. repress ptt to initiate a new clone process. (3) target radio status: led solidly glows green during the cloning process and goes out once it finishes.
tc - 320 44 6mhz service manual 30 3. difference between factory clone mode and user clone mode: (1) user clone mode: only clone the d ata of user mode. test parameters like adjustment frequency, adjustment items and base band parameter will not be cloned. (2) factory clone mode: clone all the data excluding serial no. 4. instructions: (1) error will occur when data is cloned withou t cable connection. please refer to 2 - (2). (2) error may occur during test data clone in factory clone mode if you wrongly press the side key and switch into user clone mode (led flashes red once). (3) if battery of the source radio runs low in clone m ode, red led will flash and low battery alert will be given as well. adjustment ( note: users only need to adjust the narrow bandwidth mode.) 1. description of adjustment procedures: (1) simultaneously hold down ptt , sk and power on/off key for more tha n 4s to enter adjustment mode (orange led flashes). after the keys are released, the radio will enter the adjustment item in this mode (the item entered depends on the position where the channel selector knob locates). and led will flash red or green acco rding to the rx and tx status of the adjustment item. (2) or connect the programming cable to the radio for real - time adjustment in pc mode. 2. description of adjustment items: (1) wide/narrow bandwidth switch and frequency switch in an adjustment ite m: in an adjustment item, short press sk to switch between wide and narrow bandwidth. the default adjustment point is the 1st frequency (low frequency) of current bandwidth. after selecting a bandwidth, short press (no longer than 1s) ptt to switch among different frequencies. (2) adjustment items include: tx items: tx frequency tolerance and vco lock voltage. note: these items are adjusted outside the adjustment mode via hardware. tx low power, cdcss wave, cdcss deviation, ctcss deviation (low), ctc ss deviation (medium), ctcss deviation (high), tx low voltage threshold and max. deviation. note: these items are adjusted inside the adjustment mode via software.
tc - 320 44 6mhz service manual 31 rx items: vco lock voltage (outside the mode), squelch and rx low voltage threshold. 3. specific operations and requirements: (1) conventional adjustment items (outside the adjustment mode): tx frequency tolerance, vco lock voltage. (note: the configuration file has preset ch1, ch2 and ch3 as wide bandwidth with low, medium and high freque ncy respectively and ch4, ch5 and ch6 as narrow bandwidth with low, medium and high frequency respectively. make sure the antenna or load is connected before adjustment.)
tc - 320 446mhz service manual 32 item condition test adjustment specifications / remarks test instrument test point part method tx frequency tolerance rotate the channel selector knob to ch1 and press ptt to transmit. communication test set antenna vr101 adjust vr101 with ceramic tuning tool to control the center frequency within the error range. 150hz vco tx lock voltage rotate the channel selector knob to ch3 and press ptt to transmit. digital voltmeter cv tc101 adjust tc101 with ceramic tuning tool until the lock voltage meets the requirements. 1.9v 2.3v rotate the channel selector knob t o ch1 and press ptt to transmit. check 0.5v vco rx lock voltage rotate the channel selector knob to ch3. tc101 check 1.9v 2.3v rotate the channel selector knob to ch1. check 0.5v
tc - 320 446mhz service manual 33 (2) adjustment in the adjustment mode (note: m ake sure the antenna or load is connected before adjustment; rotate the channel selector knob to save the adjusted values automatically.) item condition test adjustment specification/remarks test instrument test point part method transmitting power l ow power rotate the channel selector knob to ch1 and select low frequency. communication test set / ammeter antenna connector press [+] or [ - ] key to adjust the output power, and rotate the channel selector knob to save it. 0.5w0.1w i 0.8a cdcss waveform narrow bandwidth rotate the channel selector knob to ch3 and ?wide bandwidth?and ?low frequency?are selected. communication test set bpf: <20hz~300hz antenna vr601 adjustment adjust the waveform to make it similar to square wavefor m. cdcss deviation narrow bandwidth rotate the channel selector knob to ch4 and ?wide bandwidth?and ?low frequency?are selected. press [+] or [ - ] key to make adjustments until the cdcss deviation meets the requirements. 350 550hz
tc - 320 446mhz service manual 34 ctcss deviation narrow bandwidth on ch5, ch6 and ch7, short press sk key to enter ?narrow bandwidth?, and short press ptt key to switch between different frequencies. communication test set :<20hz~300hz antenna use [+] or [ - ] key to make slight adjustmen ts until the ctcss deviation meets the requirements. 350~550hz max. deviation narrow bandwidth rotate the channel selector knob to ch9; short press sk key to switch to ?narrow band?. communication test set <20hz~15khz af:1khz 120mv antenna earpie ce socket use [+] or [ - ] key to ensure that the specifications meet the requirements. 1.7 2.3khz modulation sensitivity narrow bandwidth rotate the channel selector knob to ch9; short press sk key to switch to ?narrow band?. communication test set <20 hz~15khz af:1khz 133mv check 1.5khz tx low voltage threshold rotate the channel selector knob to ch8. digital voltmeter power supply port power supply adjust output voltage of the power supply to 3.45v, and press up or down key to sample the current value. aler t tone will be given with red led flashing when tx voltage is 3.40 - 3.50v.
tc - 320 446mhz service manual 35 (3) rx circuit adjustment items condition test instrument part method specification /remarks squelch on narrow short press sk to enter ?narrow band?. pr ess [+] and [ - ] key to adjust squelch level. short press ptt key to switch the frequency. communication test set ssg: - 118dbm mod:1khz dev: 1.5khz filter: 0.3 - 3khz antenna earpiece socket adjust the output signals of ssg to the squelch lev el. rotate the channel selector knob to save the value after three - point adjustment. squelch level(5): - 1201dbm squelch off narrow short press sk to enter ?narrow band?. press [+] and [ - ] key to adjust squelch level. short press ptt key to switch the fr equency. communication test set ssg: - 118dbm mod:1khz dev: 1.5khz filter: 0.3 3khz antenna earpiece socket adjust the output signals of ssg to the squelch level. rotate the channel selector knob to save the value after three - point adjustme nt. squelch level(5): - 1211dbm rx low voltage threshold rotate the channel selector knob to ch12. digital voltmeter power supply port power supply adjust output voltage of the power supply to 3.57v, and press up or down key to sample the curre nt value. aler t tone will be given with red led flashing when tx voltage is 3.52 - 3.62v. sensitivity narrow high, medium , low frequency out of the mode communication test set ssg: - 118dbm mod:1khz dev: 1.5khz filter: 0.3 3khz antenna earpiece socket check - 118dbm or above
tc - 320 446mhz service manual 36 troubleshooting flow chart transmit circuit
tc - 320 446mhz service manual 37 receive circuit
tc - 320 446mhz service manual 38 mcu start normal power - on alert ? the speaker works normally ? yes no yes no clock crystal ( x 601 ) of mcu works normally ? normal vcc ( operating voltage of mcu ) ? yes no check u 602 . replace x 601 . no yes other pins control normally ? mcu works normally . yes no check battery detect pin 40 , eeprom detect pin 83 / 84 and the reset ic pin 93 . replace the speaker .
tc - 320 446mhz service manual 39 disassembly and assembly disassembly 1 power of f the radio; 2 remove the belt clip. 3 remove the battery a push the battery latch upwards; b remove the battery cover; c take out the batter by lifting its bottom side. 4 remove the channel selector knob, nut and waterproof ring a deattach the channel selector kn ob cover; b unfasten the screw; c remove channel selector knob; d remove the nut and waterproof ring.
tc - 320 446mhz service manual 40 5 disassemble chassis of the radio a unfasten the 4 screws on the chassis; b lift the bottom of the chassis; c pull the chassis out. 6 remove the antenna a. un fasten the fixing screw of antenna; b. deattach the antenna. 7 disassemble the main pcb a remove the two fixing screws on the pcb; b remove the pcb and supporting ring of the channel selector knob. note: take care of the speaker cable and the charging piece at th e bottom. assembly 1 install the main pcb a make sure that the speaker is well connected, and the charging piece on the bottom is correctly installed; b install the supporting ring of the channel selector knob; c attach the main pcb; d attach an d secure two screws (take care to control the torsion force within 0.8 - 1.2kgf); note: don?t damage the speaker cable during installation.
tc - 320 446mhz service manual 41 2 assemble the antenna a attach the antenna properly; b fasten the fixing screw of antenna; 3 assemble the chassis a assemble the chassis b attach and secure the four fixing screws (take care to control torsion force within 1.2 - 1.5kgf). 4 assemble the nuts and channel selector knob on the top a attach and secure the nuts on the top of the radio (with a waterproo f ring); b attach the channel selector knob; c attach and secure the fixing screws; d attach and secure the channel selector knob cover.
tc - 320 446mhz service manual 42 5 attach the battery a insert the battery; b attach the battery cover. 6 attach the belt clip
exploded view 26 25 24 17 16 3 2 4 1 6 5 7 8 9 10 11 12 44 43 42 41 40 39 38 37 36 35 34 33 32 28 29 30 31 27 15 14 13 45 46 47 48 22 23 18 19 20 21 49 50
TC-320 446mhz parts list 2 no. part no. items qty. (pcs) 1 6201658001010 encoder knob cover (rohs) 1 2 7102006000000 machine screw m2.0*6.0mm 1 3 6000718100000 encoder knob (rohs) 1 4 7206007400000 fixing nut of encoder switch (rohs) 1 5 6100335000000 o_ring for antenna (rohs) 1 6 6000737000010 light guide (charge led) (rohs) 1 7 6000736000000 light guide (signal indicator) (rohs) 1 8 6100363000000 power key (rohs) 1 9 6201644000000 felt speaker (steel) (rohs) 1 10 7400229000000 felt speaker (cloth) (rohs) 1 11 7500250000000 speaker washer (rohs) 1 12 4210038000000 cable (rohs) 2 13 6000739000000 accessory jack cover (rohs) 1 14 6201643000000 battery discharging piece (rohs) 2 15 6000734000010 radio chassis (rohs) 1 16 li-ion battery pack (rohs) 1 17 7500249000000 sponge pad for battery cover (rohs) 2 18 6201796000000 belt clip dome (rohs) 1 19 7000205000000 spring of belt clip (rohs) 1 20 7000206000000 bolt of belt clip (rohs) 1 21 7000181000000 fender washer (rohs) 1 22 6000836000010 belt clip (rohs) 1 23 7102505000200 machine screw m2.5*4.80mm(rohs) 2 24 6000733000000 battery cover (rohs) 1 25 7000179000000 spring of battery latch (rohs) 1 26 6000738000000 battery latch (rohs) 1 27 7102008020100 self-tapping screw pt2.0*8.0mm (rohs) 4 28 7600036000000 shield of main unit (rohs) 1 29 7400233000000 pcb shield (rohs) 1 30 7400034000000 speaker insulation pad (rohs) 1 31 5001000000090 speaker (rohs) 1 32 7101904020200 self-tapping screw (version 2.0) st1.9*4.0mm (rohs) 1 33 6201671000000 charging piece (rohs) 2 34 7209802800000 supporting ring of encoder switch (rohs) 1 35 4304030000030 gray code band switch (rohs) 1 36 6201830000000 446 mhz antenna bracket (rohs) 1 37 7101704020100 self-tapping screw st1.7*4.0mm (rohs) 2 38 4301040000060 ptt switch (rohs) 2
39 7600037000000 conductive sponge (rohs) 1 40 7600020000000 3m embossed copper foil (rohs) 1 41 main pcb(rohs) 1 42 5002230000010 mic (rohs) 1 43 6100111000010 silica rubber mic bushing (rohs) 1 44 7400077000000 mic net (rohs) 1 45 6000732001000 front case (rohs) 1 46 6300062001010 decorative sheet (zink alloy) (rohs) 1 47 6100365000000 ptt key (silica rubber ) (rohs) 1 48 6000735000010 ptt key yellow (rohs) 1 49 7101700300000 self-tapping screw st1.9*4.0mm (rohs) 1 50 446 mhz antenna (rohs) 1 note: parts that are not marked with material number may vary with radio frequency band.
tc - 320 446mhz service manual 46 packing diagram
TC-320 446mhz pcb view top layer

det 27 dbm 1 -120dbm -116dbm -108dbm -99dbm -102dbm -106dbm -112dbm -92dbm -74dbm -77dbm 340mvrms 186mvrms 1.8vrms vco tx rx ant ant 1 ant ant 1 n7snt n7snt n7snt e#n e#n e#n e#n e#n TC-320 446mhz level dia g ram
5 5 4 4 3 3 2 2 1 1 d d c c b b a a vcc v_save vt vr v_save v_bat v_bat vr v_bat vt model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 11 thursday, december 11, 2008 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 11 thursday, december 11, 2008 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 11 thursday, december 11, 2008 TC-320 ptt mon ec0 r_led t_led ec1 ec2 ec3 ptt mon apa_en rxd txd cld_outp rfc apc qt_out busy(sql) bat u602 save reset q602 q601 u603 sda scl r602 r603 stb/ ck data/ tx_ctl mod_out cp qt_out xb r103 c132 ld(sig out) pll_vcc mic in af(demod) r203 r204 mod mic r305 c306 nfil in af busy cd501 q504 tx out rx lo q401 q402 q403 apc q404 u401 r421 r420 r419 q405 q101 q102 d102 d103 d101 cp mod q103 d105 tx/rx sw j202 u301 u604 up dow v1 v2 lpf rf amp rf amp pre amp apc sw sw if amp sw sw sw dc-dc eeprom vco ripple filter charg amp loop filter charg charg j201 q503 rf amp q505 mix q104 on/off reset u605 ? TC-320(446) ? q604 w402 antenna w402 antenna 1 sw604 sw604 1 2 cf501 cf501 sw606 sw606 d603/d604 d603/d604 1 2 swaf3 swaf3 sw603 sw603 1 2 b302 speaker b302 speaker + 1 - 2 d602 led d602 led 1 2 1 2 sw602 sw602 1 2 x601 x601 g601 battery g601 battery 1 2 sw601 sw601 1 2 xt101 xt101 b303 mic b303 mic + 1 - 2 sw605 sw605 1 2 u501 u501 swaf swaf d601 led d601 led 1 2 xf501 xf501 u601 u601 TC-320 446mhz block diagram
5 5 4 4 3 3 2 2 1 1 d d c c b b a a v_bat vt vr v_save r/t mod rfc tx-out rf-in cp vco-in apc model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 33 sunday, march 22, 2009 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 33 sunday, march 22, 2009 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 33 sunday, march 22, 2009 TC-320 rf TC-320u(446) ?? (rf) r112 4.7k r112 4.7k r511 nc r511 nc q405 dtc114ee q405 dtc114ee 3 1 2 r411 22k r411 22k c422 0.1u c422 0.1u c512 470p c512 470p c426 470p c426 470p d101 hvc350b d101 hvc350b 2 1 l105 0 l105 0 c445 470p c445 470p r410 47 r410 47 c415 56p c415 56p r118 7.5k r118 7.5k c146 0.1u c146 0.1u r414 2.2nh r414 2.2nh c431 1.5p c431 1.5p l414 4t l414 4t r408 27k r408 27k l409 5t l409 5t c438 0.1u c438 0.1u d104 ma2s111 d104 ma2s111 1 2 r113 100k r113 100k r407 2.2k r407 2.2k tc101 10p tc101 10p 1 2 sawf502 hdf439a sawf502 hdf439a 1 2 3 4 q103 dtc114ee q103 dtc114ee 3 1 2 c411 100p c411 100p c504 470p c504 470p c439 6p c439 6p tp100 cv tp100 cv 1 c114 0.056u c114 0.056u c420 1u/10v c420 1u/10v r427 150k(1%) r427 150k(1%) c433 2p c433 2p c443 470p c443 470p r418 100 r418 100 c434 3p c434 3p c148 4p c148 4p c133 1000p c133 1000p d402 edz6.8b d402 edz6.8b 1 2 c403 470p c403 470p r402 3.3k r402 3.3k c134 0.1u c134 0.1u c130 2.4p c130 2.4p q403 rqa0002dns q403 rqa0002dns 1 3 2 l407 221s l407 221s q104 2sc5108 q104 2sc5108 1 3 2 r115 270 r115 270 r117 5.6k r117 5.6k l408 4.7nh l408 4.7nh tp505 antg tp505 antg 1 r423 150k(1%) r423 150k(1%) l415 1uh l415 1uh q404 dta114ye q404 dta114ye 3 1 2 c413 1000p c413 1000p c417 1000p c417 1000p c502 2.2p c502 2.2p c109 0.5p c109 0.5p r417 12k r417 12k - + + - u401 njm2904 - + + - u401 njm2904 1 3 4 2 5 7 8 6 r405 1m r405 1m c428 2p c428 2p d508 hsm88as d508 hsm88as r412 22k r412 22k d501 1ss356 d501 1ss356 1 2 r110 2.2k r110 2.2k c116 0.047u c116 0.047u c441 0.1u c441 0.1u c419 15p c419 15p c406 7p c406 7p r119 10 r119 10 r419 0.39 r419 0.39 d105 hvc131 d105 hvc131 2 1 r509 nc r509 nc r424 150k(1%) r424 150k(1%) l111 22nh l111 22nh r403 4.7 r403 4.7 r111 47 r111 47 c117 100p c117 100p q102 prf957 q102 prf957 2 3 1 c432 2.4p c432 2.4p c112 9p c112 9p l410 600sg l410 600sg d505 0 d505 0 2 1 c444 470p c444 470p r425 150k(1%) r425 150k(1%) c131 100p c131 100p d103 bb179 d103 bb179 2 1 c401 2p c401 2p r116 10k r116 10k c437 0.01u c437 0.01u r106 47k r106 47k c404 47p c404 47p c416 470p c416 470p l406 5t l406 5t r109 1k r109 1k l405 4.7nh l405 4.7nh r510 nc r510 nc c423 12p c423 12p c429 nc c429 nc c115 1u/16v c115 1u/16v c418 39p c418 39p c412 1000p c412 1000p c140 4.7u/10v c140 4.7u/10v l501 3t l501 3t c144 0.5p c144 0.5p l102 3.3uh l102 3.3uh r406 15k r406 15k c407 100p c407 100p q502 nc q502 nc 3 1 2 r409 10k r409 10k c436 0.1u c436 0.1u r114 1k r114 1k l513 4.7nh l513 4.7nh c142 470p c142 470p c511 nc c511 nc r107 10k r107 10k c515 nc c515 nc c421 3.6p c421 3.6p l402 27nh l402 27nh l404 47nh l404 47nh r416 15k r416 15k l104 23nh l104 23nh c150 100p c150 100p q101 2sc5343e q101 2sc5343e 1 3 2 r428 10k r428 10k d502 nc d502 nc 2 1 r124 68k r124 68k l401 22nh l401 22nh r514 nc r514 nc l416 22nh l416 22nh r404 330 r404 330 c446 470p c446 470p l417 601s l417 601s w401 antenna w401 antenna 1 d503 0 d503 0 2 1 q501 nc q501 nc 3 1 2 c409 nc c409 nc c105 1000p c105 1000p r401 3.3k r401 3.3k r415 47 r415 47 q401 2sc4226 q401 2sc4226 2 3 1 c442 4.7u/10v c442 4.7u/10v r422 150k(1%) r422 150k(1%) c139 1000p c139 1000p c501 3.6p c501 3.6p c106 15p c106 15p l101 601s l101 601s c145 1000p c145 1000p c506 nc c506 nc c135 0.1u c135 0.1u r513 nc r513 nc l103 3.3uh l103 3.3uh d504 nc d504 nc 2 1 c408 0.1u c408 0.1u c405 470p c405 470p c514 nc c514 nc d401 1ss356 d401 1ss356 1 2 c435 1000p c435 1000p c141 1000p c141 1000p sawf501 nc sawf501 nc 1 2 3 4 c447 470p c447 470p c508 nc c508 nc d102 hvc350b d102 hvc350b 2 1 l411 0.56uh l411 0.56uh c110 2p c110 2p r421 0.39 r421 0.39 c430 4.7p c430 4.7p c427 1000p c427 1000p l504 15nh l504 15nh q402 2sk3078 q402 2sk3078 1 3 2 r426 150k(1%) r426 150k(1%) c424 470p c424 470p c107 10p c107 10p c147 470p c147 470p l413 4t l413 4t r429 22 r429 22 c510 nc c510 nc c440 470p c440 470p r420 0.39 r420 0.39 r512 nc r512 nc c425 1000p c425 1000p c513 nc c513 nc r123 47 r123 47 c138 0.01u c138 0.01u l106 601s l106 601s l412 4t l412 4t c149 7p c149 7p
5 5 4 4 3 3 2 2 1 1 d d c c b b a a v_bat vcc vcc vcc vt vr v_save v_bat vcc v_bat vcc v_bat vcc vcc vcc busy data qt_out ck stb mod af rfc mic-in mic ld apc r/t qt_mod qt_mod model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 13 saturday, march 21, 2009 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 13 saturday, march 21, 2009 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 13 saturday, march 21, 2009 TC-320 cpu TC-320u(446) s) (cpu) c627 1u c627 1u u601 srt3210 u601 srt3210 1 2 3 4 5 txd rxd apa_en save ext mic ext ptt rled gled 14 15 vssd vddd v+ v_ 20 on/off vdd_cld af_out vss_cld af_outm vdd_cld1 rfc apc vref qt_out 35 vssa vdda vox sql bat xtal0 xtal1 pll_cap 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 en0 en1 en2 en3 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 scl sda ld data ck stb vssd1 vddd1 r/t tx_ctl reset vssa1 vdda1 bg_ref micin demod mod_out 100 mon ptt 24 alm r623 100 r623 100 c304 0.1u c304 0.1u c219 1000p c219 1000p c649 nc c649 nc c651 1000p c651 1000p c201 4.7u/10v c201 4.7u/10v x601 32.768k x601 32.768k r308 4.7 r308 4.7 c625 470p c625 470p r627 nc r627 nc tp202 sp1 tp202 sp1 l606 601s l606 601s c312 0.1u c312 0.1u d603 green d603 green 1 2 q202 2sk1824 q202 2sk1824 2 3 1 c217 0.1u c217 0.1u r216 2.2k r216 2.2k c617 1000p c617 1000p tp203 tp203 r222 0 r222 0 r615 2.2k r615 2.2k c620 1000p c620 1000p r302 39k r302 39k r629 nc r629 nc r204 3.3k r204 3.3k c623 470p c623 470p c603 0.1u c603 0.1u r614 100 r614 100 c612 0.01u c612 0.01u r608 4.7k r608 4.7k c209 470p c209 470p c606 4.7u/10v c606 4.7u/10v c642 0.022u c642 0.022u r205 47k r205 47k d606 rsa6.1en d606 rsa6.1en 4 5 3 1 2 c631 470p c631 470p c611 470p c611 470p c641 470p c641 470p c316 0.33u c316 0.33u c650 nc c650 nc r610 47k r610 47k d201 nc d201 nc 1 2 c220 0.1u c220 0.1u c602 4.7u/10v c602 4.7u/10v q601 2sa1745 q601 2sa1745 1 2 3 tp202 tp202 c645 0.01u c645 0.01u r632 82k r632 82k c601 470p c601 470p up sw 604 up sw 604 1 2 r603 220k(1%) r603 220k(1%) c607 0.01u c607 0.01u c638 15p c638 15p c626 470p c626 470p r309 1k r309 1k c206 4.7u/10v c206 4.7u/10v r618 47 r618 47 r219 10k r219 10k vr601 10k vr601 10k 1 3 2 c208 0.22u c208 0.22u r203 3.3k r203 3.3k r635 nc r635 nc r630 47k r630 47k c621 1u c621 1u l607 601s l607 601s c629 100p c629 100p q602 2sa1745 q602 2sa1745 1 2 3 r611 47k r611 47k 1 c c 4 2 8 sw606 sw_channel 1 c c 4 2 8 sw606 sw_channel 1 2 3 4 5 6 u602 rt9011j6 u602 rt9011j6 vout2 1 gnd 2 en2 3 en1 4 vin 5 vout1 6 sw602 mon sw602 mon 1 2 r213 100k r213 100k r223 0 r223 0 c640 1000p c640 1000p q201 2sa1832 q201 2sa1832 1 2 3 c646 0.01u c646 0.01u r206 4.7k r206 4.7k c216 1000p c216 1000p c635 0.01u c635 0.01u l603 601s l603 601s r215 22k r215 22k c639 15p c639 15p r613 1k r613 1k r605 100 r605 100 r202 2.2k r202 2.2k r619 47 r619 47 r626 nc r626 nc l602 601s l602 601s r612 47k r612 47k d607 edz6.8b d607 edz6.8b 1 2 c634 1u c634 1u l601 600sg l601 600sg c207 1u c207 1u r310 4.7 r310 4.7 r634 470 r634 470 b201 mic b201 mic + 1 - 2 r314 0 r314 0 u605 r3112q271a u605 r3112q271a vdd 1 gnd 2 cd 3 out 4 c632 470p c632 470p tp610 charge tp610 charge 1 r633 3.9k r633 3.9k c643 4.7u/10v c643 4.7u/10v r224 12k r224 12k g601 3.8v g601 3.8v tp203 sp2 tp203 sp2 r606 8.2k r606 8.2k tp204 mic tp204 mic c302 0.47u c302 0.47u c218 0.1u c218 0.1u r607 47k r607 47k r622 4.7k r622 4.7k c614 100p c614 100p c610 1u c610 1u r218 1m r218 1m c644 470p c644 470p j201 usb j201 usb 1 2 3 4 5 c609 1u c609 1u r620 47k r620 47k r624 47k r624 47k c637 0.01u c637 0.01u c636 470p c636 470p b202 speaker b202 speaker + 1 - 2 d602 red d602 red 1 2 down sw 605 down sw 605 1 2 r625 680 r625 680 c303 1000p c303 1000p c608 1000p c608 1000p u301 ap4890 u301 ap4890 shutdown 1 bypass 2 +in 3 -in 4 vo1 5 vdd 6 gnd 7 vo2 8 c648 1000p c648 1000p r621 100 r621 100 c630 1u c630 1u r311 10 r311 10 r214 1k r214 1k d301 edz6.8b d301 edz6.8b 1 2 c314 0 c314 0 c628 1u c628 1u c305 4.7u/10v c305 4.7u/10v l201 1uh l201 1uh r617 47k r617 47k l605 601s l605 601s r315 nc r315 nc c613 1000p c613 1000p r628 nc r628 nc d605 rsa6.1en d605 rsa6.1en 4 5 3 1 2 c616 1000p c616 1000p q604 dtc114ee q604 dtc114ee 3 1 2 d610 edz6.8b d610 edz6.8b 1 2 r301 10k r301 10k r609 470 r609 470 r602 220k(1%) r602 220k(1%) sw601 on/off sw601 on/off 1 2 3 u606 mc34673 u606 mc34673 vin 1 ppr 2 chg 3 en 4 gnd 5 fast 6 iset 7 bat 8 epad 9 d604 red d604 red 1 2 c311 0.1u c311 0.1u c203 1u c203 1u r217 47k r217 47k c202 100p c202 100p c605 1000p c605 1000p c204 4700p c204 4700p u603 at24c16 u603 at24c16 1 2 3 4 dat clk 7 8 c624 470p c624 470p r616 47k r616 47k c604 1000p c604 1000p c647 4700p c647 4700p j202 mic1 j202 mic1 1 5 2 4 3 c622 470p c622 470p c633 470p c633 470p d608 edz6.8b d608 edz6.8b 1 2 sw603 ptt sw603 ptt 1 2 r631 47k r631 47k r636 nc r636 nc c615 1u c615 1u r604 100 r604 100 r201 470 r201 470 c619 1000p c619 1000p d601 green d601 green 1 2 r208 6.8k r208 6.8k r207 1k r207 1k tp205 sp tp205 sp c313 0.1u c313 0.1u c301 0.33u c301 0.33u c618 2.2u c618 2.2u TC-320 446mhz schematic diagram (cpu)
5 5 4 4 3 3 2 2 1 1 d d c c b b a a vr v_save v_save v_save ld ck data stb af rf-in qt_out vco-in cp tx-out mic-in mic busy model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 23 saturday, march 21, 2009 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 23 saturday, march 21, 2009 TC-320 model name: prepare: file no.: rev: date: page: of part name: hyt science&technology co.ltd. check: approve: v01 23 saturday, march 21, 2009 TC-320 pll TC-320u(446) ?? (pll) c306 56p c306 56p c124 100p c124 100p cf501 alfym450f(6.0k) cf501 alfym450f(6.0k) 2 1 3 5 4 r507 1k r507 1k c536 0.1u c536 0.1u r527 0 r527 0 r506 270 r506 270 r312 22k r312 22k r528 12k r528 12k c532 2p c532 2p c310 4700p c310 4700p r530 10 r530 10 r102 47k r102 47k c125 100p c125 100p c542 470p c542 470p rn101 1k rn101 1k 1 2 3 4 5 6 7 8 c524 470p c524 470p r211 22k r211 22k c520 0.1u c520 0.1u c507 180p c507 180p q505 2sc4226 q505 2sc4226 2 3 1 cd501 jtbm450c24 cd501 jtbm450c24 1 2 u501 jtb32303-as u501 jtb32303-as vco sw 1 vco in 2 vdet 3 pll-gnd 4 cp 5 clk 6 stb 7 data 8 pll-vcc 9 sig out 10 xb 11 xe 12 x-vcc 13 xout 14 x-gnd 15 af out 16 rssi 17 nfil out 18 nfil in 19 bs 20 quad 21 n-rec 22 if in 24 if dec 25 2nd-mix in 26 vcc1 27 2nd-mix out 28 gnd1 29 rx lo 30 rf out 32 rf dec 34 rf-vcc 33 rf in 35 rf-gnd1 36 tx-gnd1 37 tx out 38 tx-gnd2 39 tx vol 40 rf-gnd2 41 vref 42 mic in 43 mic out 44 nc 23 rssi ref 31 c118 0.22u c118 0.22u l512 nc l512 nc r501 1m r501 1m r529 6.8k r529 6.8k c309 220p c309 220p c315 0.1u c315 0.1u r505 270 r505 270 r305 3.3k r305 3.3k c119 100p c119 100p c544 12p c544 12p c211 10p c211 10p l511 15nh l511 15nh c102 1000p c102 1000p c526 33p c526 33p l110 1uh l110 1uh c132 4.7/10v c132 4.7/10v r121 47k r121 47k c540 0.01u c540 0.01u vcc out vcont gnd xt101 21.25mhz vcc out vcont gnd xt101 21.25mhz 1 2 3 4 c535 nc c535 nc r220 22k r220 22k sawf503 hdf446 sawf503 hdf446 1 2 3 4 c212 0.022u c212 0.022u c123 0.1u c123 0.1u c525 nc c525 nc r307 3.3k r307 3.3k r313 47k r313 47k c545 4p c545 4p xf501 21.7mhz xf501 21.7mhz 2 1 3 c527 1p c527 1p r516 10 r516 10 r101 10 r101 10 c101 0.1u c101 0.1u r120 10k r120 10k c534 0.3p c534 0.3p l516 39nh l516 39nh c530 15p c530 15p c518 0.1u c518 0.1u c538 22p c538 22p c120 1000p c120 1000p l109 601s l109 601s c104 10p c104 10p c103 10p c103 10p l107 1uh l107 1uh r519 nc r519 nc c547 1u c547 1u c529 82p c529 82p r518 100r r518 100r c523 100p c523 100p r209 8.2k r209 8.2k c121 100p c121 100p l503 33n l503 33n l509 2.2uh l509 2.2uh c307 470p c307 470p c215 0.22u c215 0.22u r303 270k r303 270k r502 2.7k r502 2.7k c519 0.22u c519 0.22u c210 4.7u/10v c210 4.7u/10v r525 4.7k r525 4.7k l507 nc l507 nc q504 2sc5108 q504 2sc5108 1 3 2 c543 470p c543 470p c541 1000p c541 1000p c531 2p c531 2p r210 10k r210 10k d506 edz6.8b d506 edz6.8b 1 2 c122 100p c122 100p l505 100nh l505 100nh c308 220p c308 220p c127 0.1u c127 0.1u r304 68k r304 68k c517 22p c517 22p vr101 68k vr101 68k 1 3 2 l510 0 l510 0 r508 nc r508 nc c546 1000p c546 1000p c126 1000p c126 1000p r125 68k r125 68k c539 1000p c539 1000p l108 601s l108 601s c128 4.7u/10v c128 4.7u/10v r306 27k r306 27k c213 0.22u c213 0.22u r526 82 r526 82 l508 15nh l508 15nh r103 47k r103 47k c528 0.1u c528 0.1u r517 470k r517 470k l514 12nh l514 12nh q503 at-41511 q503 at-41511 1 2 4 3 r212 100k r212 100k
tc - 320 446mhz service manual 54 specific ations general specifications frequency range 446.00625 - 446.09375mhz channel capacity 16 channel spacing 12.5khz operating voltage 3.8v dc battery 1100mah li - ion battery battery life (5 - 5 - 90 duty cycle) about 8 hours operating temperature - 20 ~+55 dimensions(h w d ) (with battery, without antenna) 100mm48mm27mm weight (with antenna & battery) 135g frequency stability 2.5ppm receiver sensitivity 0.28 v selectivity 55db intermodulation 55db spurious response rejection 60db rated audio power output 0.4w (speaker impedance: 8 ohm) rated audio distortion 5% 0.4w transmitter rf power output 0.5w spurious and harmonics - 36dbm modulation limiting 2.5khz fm noise 34db modulation distortion 5% note: all the a bove specifications and designs are subject to change without notice due to continuous development. hyt endeavors to achieve the accuracy and completeness of this manual, but no warranty of accuracy or reliability is given. all the specifications and des igns are subject to change without notice due to continuous technology development. changes which may occur after publication are highlighted by revision history contained in service manual. no part of this manual may be copied, reproduced, translated, s tored in a retrievable system, distributed, or transmitted in any form or by any means, electronic or mechanical, for any purpose without the express written permission of hyt.

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