HYT TC-610 Service Manual
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HYT TC-610 Service Manual

Two-way radio
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  • Page 2 General--------------------------------------------------------------------------------------------2 Radio Overview ------------------------------------------------------------------------------ ---3 Programmable Functions-------------------------------------------------------------------------7 Software Specifications-------------------------------------------------------------------------8 Circuit Description-------------------------------------------------------------------------------12 CPU Pins --------------------------------------- -----------------------------------------------20 TC-610/620 VHF Parts List 1----------------------------------------------------------------------23 TC-610/620 UHF Parts List 1---------------------------------------------------------------------38 Adjustment Description---------------------------------- ---------------------------------------59 Troubleshooting Flow Chart----------------------------- ---------------------------------69 Disassembly and Assembly for Repair------------------------------------------------------72 Exploded View---------------------------------------------------- ------------------------------75...
  • Page 3  Do not transmit until all RF connectors are verified secure and any open connectors are properly terminated.  Use only HYT original batteries and chargers.  Turn off your radio prior to entering any area with a potentially explosive atmosphere.
  • Page 4 TC-610/620 Service Manual Radio Overview TC-610 ① PTT(Push-to-Talk) ② SK1(programmable ③ SK2(programmable ④ Speaker key) key) ⑧ Channel ⑤ Microphone ⑥ Antenna ⑦ LED Indicator Selector Knob ⑨ Radio On-Off/Volume Accessory Jack and ⑪ ⑩ Battery Latch Accessory Cover ⑫...
  • Page 5 TC-610/620 Service Manual TC-620 ① PTT(Push-to-Talk) ② SK1 (programmable ③ SK2(programmable ④ Speaker key) key) ⑧ Channel ⑤ Microphone ⑥ Antenna ⑦ LED Indicator Selector Knob ⑨ Radio On-Off/Volume Accessory Jack and Accessory ⑪ ⑫ ⑩ Battery Latch Control Knob...
  • Page 6 TC-610/620 Service Manual (1) PTT (Push-to-Talk) Key Used to switch between transmit and receive modes. Hold down the PTT key and speak into the microphone to transmit, and release it to receive. (2) SK1 Key Side key 1, programmable. Your dealer can assign one function to the key via the programming software.
  • Page 7 TC-610/620 Service Manual 1. The LED flashes green every 1 second when detecting. 2. Scan Start Tone (programmable by your dealer): One beep is heard. Scanning 3. Scan Stop Tone (programmable by your dealer): One beep is heard. 4. Priority Channel Scan Tone (programmable by your deader): If the radio stays on a priority channel to receive, one beep will be heard.
  • Page 8 TC-610/620 Service Manual Programmable Functions The SK1/SK2 key can be assigned with one of the following auxiliary functions by your dealer.  None  Monitor  Monitor Momentary  Scan  Squelch Off  Squelch Off Momentary  Power Adjust ...

  • Page 9: Function Description

    TC-610/620 Service Manual Software Specifications Function Description Available Channels: 1 to 16 channels Channel Spacing: 25KHz/12.5KHz Channel Step: scan channels in steps of 5/6.25/10/12.5KHz Tx/Rx Indication (red/green LED) CTCSS/CDCSS Encode & Decode (CTCSS: 38 groups; CDCSS: 83 groups; the CTCSS squelch tail reverse method is selectable at 180/120 degrees.)

  • Page 10: Adjustment Description

    TC-610/620 Service Manual 1. User Wired Clone Mode Connect the two radios with the cloning cable. Power on the source radio while holding down the SK2 key on it. The radio enters Wired Clone Mode in two seconds. Rotate the Radio On-Off knob clockwise to power on the target radio, and the radio enters User Mode.
  • Page 11 CTCSS deviation (low), CTCSS deviation (medium), CTCSS deviation (high), VOX 1, VOX 2, VOX 3, VOX 4, VOX 5 and Tx low voltage threshold respectively. Note: The Tx medium power of TC-610/620 is not required to be adjusted. Please skip this item. The LED glows red for adjustment items CH1-CH14.
  • Page 12 TC-610/620 Service Manual value gets to the minimum value allowed by the adjustment item, the adjustment value will remain at the minimum value. 7. Process on Several Special Items Tx: CH9-CH14 indicate VOX 1, VOX 2, VOX 3, VOX 4, VOX 5 and Tx low voltage threshold respectively, which are related with the AD sampling.
  • Page 13 TC-610/620 Service Manual Circuit Description Realization Methods for Basic Functional Modules PLL Frequency Synthesizer The PLL circuit mainly generates the local oscillator signal for reception and the RF carrier signal for transmission. It consists of the VCO oscillator circuit and baseband processor and enables frequency tracking and channel change under the control of MCU signal.
  • Page 14 TC-610/620 Service Manual level, causing Q653 to be off and Q101 to operate. The output from Q100 and Q101 is amplified by Q102 and sent to the buffer amplifier for process. If PLL is unlocked, the LD pin of U202 outputs low level. When this situation is detected by the microprocessor, transmit/receive operations are inhibited and a warning tone is heard.
  • Page 15 TC-610/620 Service Manual will be fed to the mixer stage. MCU provides the electrically tunable control signal, the required level of which can be obtained through table looking up or formula computing, to accurately control varactors to operate within proper voltage range.
  • Page 16 TC-610/620 Service Manual According to the selected channel, MCU outputs the corresponding PWM waveform, which is reshaped by the RC filter network (R441, R442, C440 and C441) to derive the level for the APC/TUNE control signal. One part is used as the control voltage of the Rx electrically tunable circuit after passing through R500.
  • Page 17 TC-610/620 Service Manual 2. Diagram for Rx Audio & Signalling Process 2ndIF BPF CF300 450KHz+/4.5K SPVCC To MCU IFAmp1 U200 DATA AN29160AA RSSI IFAMP2 LATCH POWERREG PROCESSER mix2 volume mute VREF 5th-HPF Mic amp sp Amp (TX) tone-LPF mic mute...
  • Page 18 TC-610/620 Service Manual MCU Control Section The diagram for the MCU control section is shown below. MCU works on the 7.3728MHz clock frequency. U609 AT24C64 Channel SW 1.vox 2.BUSY_DET 3.BEEP/CALL U605 4.T/R APC/TUNE 5.SAVE 6.DC/CTC 7.W/N MB95F108AK 8.UART 9.BAT_DET 10.PLL_LD WPFV-GE1 7.3728M晶体...

  • Page 19: Power Management

    TC-610/620 Service Manual Data Transmission and Process EEPROM data initiation Programming data transmission Encode process of Channel Selector knob Signalling encode and decode Data transmission of baseband processor (PLL) Power Supply Process Diagram for the Circuit POWER-SAVE V-TX FMMT717 FMMT717...
  • Page 20 TC-610/620 Service Manual VOX Realization The diagram is shown below: Q202 VCC_5V 2SA1832 R206 1K EXPTT R207 R208 C212 100K R205 0.1U R204 470 C213 MIC_EN Q201 2SK1824 C260 R202 100 220P C274 R203 R251 0.01U MICJACK 4.7K TP200 C202 0.1U...
  • Page 21 TC-610/620 Service Manual CPU Pins Pin Name TC-610 TC-620 Description Pin No. Power supply pin for A/D, connecting AVcc power supply A/D reference input pin, connecting power supply PTT key (connected with pull-up resistor ) PE3/INT13 (valid at low level)
  • Page 22 TC-610/620 Service Manual This port can not be used as IO and a capacitor is connected between the port and the grounded Vss. PG2/X1A OSC32K OSC32K Subsystem clock pin (reserved） PG1/X0A OSC32K OSC32K Reset (when downloading, it is connected /RST...
  • Page 23 TC-610/620 Service Manual P51/SDA0 EEPROM DATA P52/PPG1 AP/TU AP/TU Auto power control/adjust Tx power supply control “ H” : valid P53/TRG1 TX_CTRL TX_CTRL Transmission is on. P60/PPG10 PLLCLK PLLCLK PLL CLOCK P61/PPG11 PLLDATA PLLDATA PLL DATA P62/TO10 PLLEN PLLEN PLL ENABLE...
  • Page 24 TC-610/620 Service Manual TC-610/620 VHF Parts List 1 Material No. Description Qty. Ref. No. Address 3001050000000 Chip resistor 0402 0Ω J 1/16W 1 C222 3001050000000 Chip resistor 0402 0Ω J 1/16W 1 R103 3001050000000 Chip resistor 0402 0Ω J 1/16W...
  • Page 25 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3001051030000 Chip resistor 0402 10KΩ J 1/1 1 R213 3001051030000 Chip resistor 0402 10KΩ J 1/1 1 R248 3001051030000 Chip resistor 0402 10KΩ J 1/1 1 R256 3001051030000 Chip resistor 0402 10KΩ J 1/1...
  • Page 26 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3001051540000 Chip resistor 0402 150KΩ F 1/ 1 R430 3001051540000 Chip resistor 0402 150KΩ F 1/ 1 R431 3001051540000 Chip resistor 0402 150KΩ F 1/ 1 R432 3001051540000 Chip resistor 0402 150KΩ F 1/...
  • Page 27 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3001053340000 Chip resistor 0402 330KΩ J 1/ 1 R260 3001053340000 Chip resistor 0402 330KΩ J 1/ 1 R262 3001053340000 Chip resistor 0402 330KΩ J 1/ 1 R702 3001053630000 Chip resistor 0402 36KΩ J 1/1...
  • Page 28 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3001055110000 Chip resistor 0402 510Ω J 1/1 1 R503 3001055610000 Chip resistor 0402 560Ω J 1/1 1 R100 3001055610000 Chip resistor 0402 560Ω J 1/1 1 R517 3001055610000 Chip resistor 0402 560Ω J 1/1...
  • Page 29 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3101051010030 Chip capacitor 0402 100PF J 50 1 C110 3101051010030 Chip capacitor 0402 100PF J 50 1 C201 3101051010030 Chip capacitor 0402 100PF J 50 1 C266 3101051010030 Chip capacitor 0402 100PF J 50...
  • Page 30 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3101051020010 Chip capacitor 0402 1000PF K 5 1 C684 3101051020010 Chip capacitor 0402 1000PF K 5 1 C685 3101051020010 Chip capacitor 0402 1000PF K 5 1 C686 3101051020010 Chip capacitor 0402 1000PF K 5...
  • Page 31 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3101051040060 Chip capacitor 0402 0.1UF K 16 1 C329 3101051040060 Chip capacitor 0402 0.1UF K 16 1 C330 3101051040060 Chip capacitor 0402 0.1UF K 16 1 C331 3101051040060 Chip capacitor 0402 0.1UF K 16...
  • Page 32 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3101051520000 Chip capacitor 0402 1500PF K 5 1 C224 3101051520000 Chip capacitor 0402 1500PF K 5 1 C233 3101051830000 Chip capacitor 0402 0.018UF K 1 C207 3101052200010 Chip capacitor 0402 22PF J 50V...
  • Page 33 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3101054710010 Chip capacitor 0402 470PF K 50 1 C437 3101054710010 Chip capacitor 0402 470PF K 50 1 C442 3101054710010 Chip capacitor 0402 470PF K 50 1 C512 3101054710010 Chip capacitor 0402 470PF K 50...
  • Page 34 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3210107220000 Bobbin inductor 0805 22nH 1 L516 3101061000000 Chip capacitor 0603 10PF J 50V 1 C457 3101061000000 Chip capacitor 0603 10PF J 50V 1 C444 3101061020000 Chip capacitor 0603 1000PF K 5...
  • Page 35 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address 3210406331000 Multi-layer chip inductor 0603 330nH 1 L306 3212105470000 Multi-layer chip inductor 0402 47nH 1 L112 3213212102000 Multi-layer chip inductor 1008 1uH 1 L403 3213212102000 Multi-layer chip inductor 1008 1uH...
  • Page 36 3801045030130 Ceramic filter 450KHz ± 6.0KHz 1 CF300 3802388540010 Crystal filter 38.850MHz MFT3 1 XF1 5205000001000 TC-610 battery connector Black PA9T 1 G1 3101051230000 Chip capacitor 0402 0.012UF K 1 C238 3101051820000 Chip capacitor 0402 1800PF K 5 1 C235...
  • Page 37 1 L401 3001051800000 Chip resistor 0402 18Ω J 1/16 1 R408 3210306270000 Multi-layer chip inductor 0603 27nH 1 L412 41006101001B0 TC-610/620 VHF PCB F 3101055610000 Chip capacitor 0402 560PF K 50 1 C206 3231301340000 Air-core inductor E2 0.3*1.3*4TR 1 L409 3231351650000 Air-core inductor E2-0.35*1.6*5TL...
  • Page 38 Zener diode EDZTE616.8B 1 D201 3399990000080 Zener diode EDZTE616.8B 1 D202 3399990000080 Zener diode EDZTE616.8B 1 D203 3399990000080 Zener diode EDZTE616.8B 1 D430 3302030500020 Zener diode UDZSTE(1718B)1 1 D655 636 4100510300000 TC-610/620 PTT key PCB 0.6T/2L/1P 637 3920450300000 Demodulator 450KHz± 4kHz JTBM450C24...
  • Page 39 TC-610/620 Service Manual TC-610/620 UHF Parts List 1 Material No. Description Qty. Ref. No. Address Remarks 3001050000000 Chip resistor 0402 0Ω J 1/16 1 C222 3001050000000 Chip resistor 0402 0Ω J 1/16 1 R244 3001050000000 Chip resistor 0402 0Ω J 1/16...
  • Page 40 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 3001051020000 Chip resistor 0402 1KΩ F 1/16 1 R670 3001051020000 Chip resistor 0402 1KΩ F 1/16 1 R694 3001051030000 Chip resistor 0402 10KΩ J 1/1 1 R104 3001051030000 Chip resistor 0402 10KΩ J 1/1...
  • Page 41 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 3001051050000 Chip resistor 0402 1MΩ F 1/16 1 R251 3001051050000 Chip resistor 0402 1MΩ F 1/16 1 R437 3001051050000 Chip resistor 0402 1MΩ F 1/16 1 R500* U1:400-420MHz 3001051050000 Chip resistor 0402 1MΩ...
  • Page 42 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 134 3001051830000 Chip resistor 0402 18KΩ J 1/1 1 R239 135 3001051840000 Chip resistor 0402 180KΩ J 1/ 1 R107 136 3001051840000 Chip resistor 0402 180KΩ J 1/ 1 R238 137 3001051840000 Chip resistor 0402 180KΩ...
  • Page 43 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 179 3001050000000 Chip resistor 0402 0Ω J 1/16 U3:440-470MHz 180 3001050000000 Chip resistor 0402 0Ω J 1/16 U4:470-490MHz 181 3001050000000 Chip resistor 0402 0Ω J 1/16 U7:420-450MHz 182 3001053030000 Chip resistor 0402 30KΩ...
  • Page 44 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 224 3001054720000 Chip resistor 0402 4.7KΩ J 1/ 1 R203 225 3001054720000 Chip resistor 0402 4.7KΩ J 1/ 1 R231 226 3001054720000 Chip resistor 0402 4.7KΩ J 1/ 1 R312 227 3001054720000 Chip resistor 0402 4.7KΩ...
  • Page 45 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 269 3001058210000 Chip resistor 0402 820Ω J 1/1 1 R661 270 3001058220010 Chip resistor 0402 8.2KΩ F 1/ 1 R234 271 3001058230000 Chip resistor 0402 82KΩ J 1/1 1 R264 272 3001058240000 Chip resistor 0402 820KΩ...
  • Page 46 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 314 3101050200010 Chip capacitor 0402 2PF B 50V U7:420-450MHz 315 3101050400010 Chip capacitor 0402 4PF B 50V 1 C524* U1:400-420MHz 316 3101050200010 Chip capacitor 0402 2PF B 50V U2:450-470MHz...
  • Page 47 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 359 3101051000020 Chip capacitor 0402 10PF J 50V 1 C435* U1:400-420MHz 360 3101051000020 Chip capacitor 0402 10PF J 50V U2:450-470MHz 361 3101054710010 Chip capacitor 0402 470PF K 50 U3:440-470MHz...
  • Page 48 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 404 3101051020010 Chip capacitor 0402 1000PF K 5 1 C658 405 3101051020010 Chip capacitor 0402 1000PF K 5 1 C661 406 3101051020010 Chip capacitor 0402 1000PF K 5 1 C666...
  • Page 49 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 449 3101051040060 Chip capacitor 0402 0.1UF K 16 1 C329 450 3101051040060 Chip capacitor 0402 0.1UF K 16 1 C330 451 3101051040060 Chip capacitor 0402 0.1UF K 16 1 C331 452 3101051040060 Chip capacitor 0402 0.1UF K 16...
  • Page 50 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 494 3101050800000 Chip capacitor 0402 8PF B 50V U4:470-490MHz 495 3101050800000 Chip capacitor 0402 8PF B 50V U7:420-450MHz 496 3101051200020 Chip capacitor 0402 12PF J 50V 1 C111* U1:400-420MHz...
  • Page 51 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 539 3101053340010 Capacitor 0402 0.33UF X5R K 1 C102 540 3101053340010 Capacitor 0402 0.33UF X5R K 1 C104 541 3101053910000 Chip capacitor 0402 390PF J 50 1 C228 542 3101053910000...
  • Page 52 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 584 3101054710010 Chip capacitor 0402 470PF K 50 1 C410 585 3101054710010 Chip capacitor 0402 470PF K 50 1 C417 586 3101054710010 Chip capacitor 0402 470PF K 50 1 C430...
  • Page 53 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks U4:470-490MHz 630 3101061590010 Chip capacitor 0603 1.5PF B 50 U7:420-450MHz 631 3101060300010 Chip capacitor 0603 3PF B 50V 1 C426* U1:400-420MHz 632 3101060100010 Chip capacitor 0603 1PF B 50V...
  • Page 54 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 674 3101060590010 Chip capacitor 0603 0.5PF B 50 1 C423* U1:400-420MHz 675 3101061000000 Chip capacitor 0603 10PF J 50V U2:450-470MHz 676 3101061000000 Chip capacitor 0603 10PF J 50V U3:440-470MHz...
  • Page 55 TC-610/620 Service Manual Material No. Description Qty. Ref. No.Address Remarks 719 3101060400010 Chip capacitor 0603 4PF B 50V U2:450-470MHz 720 3101060500010 Chip capacitor 0603 5PF B 50V U3:440-470MHz U4:470-490MHz U7:420-450MHz 723 3101062210000 Chip capacitor 0603 220PF J 50 1 C450* T4C...
  • Page 56 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 764 3210305330000 Multi-layer chip inductor 0402 33nH 1 L115 765 3210305390000 Multi-layer chip inductor 0402 39nH 1 L111 766 3210306220000 Multi-layer chip inductor 0603 22nH 1 L401 767 3210306220000...
  • Page 57 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 809 3231351640000 Air-core inductor E2-0.35*1.6*4TL 1 L452 810 3231351640000 Air-core inductor E2-0.35*1.6*4TL 1 L454 811 3231351640000 Air-core inductor E2-0.35*1.6*4TL 1 L500 812 3231351640000 Air-core inductor E2-0.35*1.6*4TL 1 L501* U1:400-420MHz 813 3231351640000 Air-core inductor E2-0.35*1.6*4TL...
  • Page 58 TC-610/620 Service Manual Material No. Description Qty. Ref. No. Address Remarks 854 3304060300050 Varactor HVC350BTRF-E 1 D504 855 3304060300050 Varactor HVC350BTRF-E 1 D505* U1:400-420MHz U2:450-470MHz 857 3304060300050 Varactor HVC350BTRF-E U3:440-470MHz 858 3304060300050 Varactor HVC350BTRF-E U4:470-490MHz U7:420-450MHz 860 3304060300050 Varactor HVC350BTRF-E...
  • Page 59 905 3801045030130 Ceramic filter 450KHz ± 6.0KHz 1 CF300 T1J 906 3802388540010 Crystal filter 38.850MHz MFT3 1 XF1 907 5205000001000 TC-610 Battery connector PA9T 1 G1 908 3101051230000 Chip capacitor 0402 0.012UF K 1 C238 T3K 909 3101051820000 Chip capacitor 0402 1800PF K 5...
  • Page 60 TC-610/620 Service Manual Adjustment Description Diagram of Operation Key (Take TC-610 for example) Instrument Radio Communication Test Set (HP8921) 1 set 10V/3A DC Regulated Power Supply 1 set Digital Voltmeter 1 set Ammeter 1 set Preparation Before Adjustment Put the board to be tested on the test clamp and turn the power on.
  • Page 61 TC-610/620 Service Manual The orange LED (red LED + green LED) lights, indicating the entry into the adjustment mode. Release the keys to enter the corresponding Tx adjustment item (preset power) of the adjustment mode. The red LED lights. Adjust each specification according to the operation instructions.
  • Page 62 TC-610/620 Service Manual Adjustment Items Tx frequency tolerance, VCO lock voltage, maximum deviation and modulation sensitivity Note: These items are adjusted outside the adjustment mode (unnecessary to enter the adjustment mode) via hardware. Tx low power, Tx high power, CDCSS waveform, CDCSS deviation, CTCSS deviation (low), CTCSS deviation (medium), CTCSS deviation (high) and Tx low voltage threshold.
  • Page 63 TC-610/620 Service Manual Rotate to CH1, Adjust the output CH2 and CH3 audio signal of the Radio respectively. radio communication 8～15mV communication Press PTT to test set to get the test set transmit. deviation to 3.0KHz. Modulation BPF: 0.3 Rotate to CH4,...
  • Page 64 TC-610/620 Service Manual 2. Adjustments in the adjustment mode Note: The antenna or load must be connected before adjustment. Measurement Adjustment Specifications/ Item Condition Test Test Remarks Parts Method Equipment Point Rotate to CH4. Press PTT to enable Press SK1/SK2 to the function.
  • Page 65 TC-610/620 Service Manual Rotate to CH6, CH7 and CH8 Adjust VR601 with respectively and a ceramic tuning CTCSS is set to tooland check each low, medium and frequency. Enter 500~900Hz (It is high respectively. the mode to adjust recommended Press PTT to...
  • Page 66 TC-610/620 Service Manual Radio Rotate to CH9. Adjust with SK1/SK2 and communication test VOX 1 rotate the Channel Press SK1 or Selector knob to BPF: <20Hz~15kHz SK2 to enable Save after one-point AF:1kHz the function. adjustment. 10mV Radio Rotate to CH10.
  • Page 67 TC-610/620 Service Manual Rotate to CH1 and Radio SQL level 1 ON is set. communication Press SK1 or SK2 to test set Squelch enable the function. SSG: -122dBm Level 1: The channel spacing MOD: 1KHz -122± 1dB is wide band.
  • Page 68 TC-610/620 Service Manual Rotate to CH4 and SQL level 1 OFF is Radio set. Press SK1 or communication SK2 to enable the Squelch test set function. Level 1: SSG: -124dBm The channel spacing -124± 1dB MOD: 1KHz is wide band.
  • Page 69 TC-610/620 Service Manual Appendix 1: Reference Software Values for TC-610/620 Source Radio Wide Narrow Test Items Freq. Freq. Freq. Freq. Freq. Freq. Freq. Freq. Freq. Freq. Adjust Preset Tx Power Tx Low Power Tx High Power 1111 1076 1055 1047...
  • Page 70 TC-610/620 Service Manual Troubleshooting Flow Chart Tx Section...
  • Page 71 TC-610/620 Service Manual Rx Section...
  • Page 72 TC-610/620 Service Manual...

  • Page 73: Removing The Battery

    TC-610/620 Service Manual Disassembly and Assembly for Repair (Take TC-610 for example) Removing the Battery 1. Turn off the radio. Hold the upper side of the radio and press the belt clip until it tilts. Push the battery latch upwards along the slot of the battery latch at the bottom of the battery, as indicated by the arrow.
  • Page 74 TC-610/620 Service Manual Note: If the battery is not fastened or is still adrift, please remove the battery and install it again. Figure 4 Removing the Aluminum Chassis ① Remove the two screws at the bottom of the radio. ② Pull out the Volume Control knob and Channel Selector Knob.

  • Page 75: Removing The Antenna

    TC-610/620 Service Manual Figure 7 Attaching the Aluminum Chassis The attaching procedures are contrary with those for removing the chassis. Removing the Antenna Rotate the antenna counter-clockwise to remove the antenna. See figure 8. Figure 8 Attaching the Antenna 1. Insert the threaded end of the antenna into the big threaded port at the top of the radio.
  • Page 77 TC-610/620 Service Manual TC-620...
  • Page 78 TC-610/620 Service Manual TC-610/620 VHF/UHF Parts List 2 TC-610 Material No. Description Qty. 6000631001010 Volume control knob 01(RoHS) 6000630001010 Channel selector knob 01(RoHS) 6201006000000 Inner liner knob 00(RoHS) 7207002200200 Nut 00(RoHS) 6100334000000 O-RING, channel selector knob 00(RoHS) 6000640001000 Light guide 00(RoHS)
  • Page 79 6201066000000 Inner liner knob 00(RoHS) 6201006000000 Inner liner knob 00(RoHS) 6000630001010 Channel selector knob 01(RoHS) 6000631001010 Volume control knob 01(RoHS) 8600620600000 HYT LOGO PC label 00(RoHS) Remarks: Parts that are not marked with material number can vary according to changes of their corresponding frequencies.
  • Page 80 TC-610/620 Service Manual Packing (Take TC-610 for example)
  • Page 85 TC-610/620 Service Manual TC-610/620 VHF/UHF Level Diagram TX PART 16mVrms 450mVrms 150mVrms -45dBm -26dBm -8dBm 3dBm 15dBm 27dBm 39dBm 37dBm buffer stimulator power AMP Q400 2SC5108 Q401 2SK4988 AN29160 MICROPHONE Q402 Q403 Q100 Q104 C112 2SK508NV Q102 D400 2SK3475 RQA0002...
  • Page 86 TC-610/620 VHF Block Diagram TC-610&620 VHF 原理框图 ANTENNA RF PA Q403 Q402 RQA0002 2SK3475 Q103 Q400 U609 Q104 2SC5108 2SC5108 A T 2 4 C 6 4 Q401 MATCH R/TSW 2SC4988 L453 Q102 3 Amplifier BUFFER green D602 D601 D100...
  • Page 87 TC-610/620 UHF Block Diagram TC-610&620UHF原理框图 ANTENNA ANTENNA RF PA Q403 Q402 RQA0002 RQA0002 2SK3475 2SK3475 Q103 Q400 Q400 U609 Q104 Q104 2SC5108 2SC5108 2SC5108 2SC5108 A T 2 4 C 6 4 Q401 Q401 MATCH R/TSW 2SC4988 2SC4988 L453 L453...
  • Page 88 TC610/620 VHF 原理图 TC-610/620 VHF Schematic Diagram (AF&IF&PLL) V_SAVE L308 L308 1K*4 1K*4 PLLEN C253 C253 X300 X300 C320 1000P C320 1000P L301 L301 C323 1000P C323 1000P PLLDATA R303 R303 L300 L300 C316 C316 PLLCLK V_SAVE 0.1U 0.1U 1.8K 1.8K...
  • Page 89 TC-610/620 VHF Schematic Diagram (MCU&POWER) TC610/620 VHF 原理图 VCC_5V APC/TU U609 U609 TX_C PLLCLK AT24C64 AT24C64 PLLDATA DATA C642 C642 PLLEN 0.1u 0.1u V_BAT R690 R690 R698 R698 R695 R695 C667 C667 D601 D601 D602 D602 C666 C666 R696 R696...
  • Page 90 TC-610/620 VHF Schematic Diagram (VCO&RF) TC610/620 VHF 原理图 ANTENNA ANTENNA V_SAVE V_SAVE L113 L113 R110 R110 D401 D401 L114 L114 C139 C139 C135 C135 R116 R116 R408 R408 C407 C407 C412 C412 C429 C429 C450 C450 C456 C456 C458 C458...
  • Page 91 TC-610/620 UHF Schematic Diagram (AF&IF&PLL) 原理图 TC-610&620 UHF (AF&IF&PLL) V_SAVE L308 L308 1K*4 1K*4 PLLEN C253 C253 X300 X300 C320 1000P C320 1000P L301 L301 C323 1000P C323 1000P PLLDATA R303 R303 L300 L300 C316 C316 PLLCLK 0.1U 0.1U 1.8K 1.8K...
  • Page 92 TC-610/620 UHF Schematic Diagram (MCU&POWER) 原理图 TC-610&620 UHF (MCU&POWER) VCC_5V APC/TU U609 U609 TX_C PLLCLK AT24C64 AT24C64 PLLDATA DATA C642 C642 PLLEN 0.1u 0.1u V_BAT R690 R690 R698 R698 R695 R695 C667 C667 D601 D601 D602 D602 C666 C666 R696...
  • Page 93 TC-610/620 UHF Schematic Diagram (VCO&RF) 原理图 TC-610&620 UHF (VCO&RF) V_SAVE V_SAVE R110 R110 C139 C139 L113 L113 C135 C135 L114 L114 R116 10 R116 10 C402* C402* R404 1.5K R404 1.5K C405* C405* C429* C429* ANTENNA ANTENNA 470P 470P C407* 15P...
  • Page 94 1200mAh Li-Ion battery Battery Life (5-5-90 duty cycle) About 10 hours -20～+50℃ Operating Temperature Dimensions（H×W×D） TC-610: 119mm x 55mm x 33mm TC-620: 117mm x 54mm x 31mm (with battery, without antenna) Weight (with antenna & battery) TC-610: 270g TC-620: 275g Frequency Stability ±...

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Tc-620

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