HYT TC-700 Service Manual
  1. Manuals
  2. Brands
  3. HYT Manuals
  4. Two-Way Radio
  5. TC700
  6. Service manual

HYT TC-700 Service Manual

5-tone model
Hide thumbs Also See for TC-700:
Table of Contents

Advertisement

Quick Links

See also: User Manual , Manual

Advertisement

Table of Contents
loading

Related Manuals for HYT TC-700

Summary of Contents for HYT TC-700

  • Page 2: Table Of Contents

    Brief Introduction--------------------------------------------------------------------------2 Software Specification-------------------------------------------------------------------4 Circuit Description--------------------------------------------------------------------9 CPU Pins-----------------------------------------------------------------------------------14 Parts List 1--------------------------------------------------------------------------------17 Adjustment Description---------------------------------------------------------------49 Trouble-shooting Flow Chart------------------------------------------------------55 Disassembly and Assembly for Repair-----------------------------------------59 Exploded View----------------------------------------------------------------------------62 Parts List 2----------------------------------------------------------------------------63 Packing--------------------------------------------------------------------------------65 PCB View--------------------------------------------------------------------------------66 Block Diagram-------------------------------------------------------------------------72 Level Diagram-------------------------------------------------------------------------73 Schematic Diagram-------------------------------------------------------------------74 Description of TC-700 Desktop Charger-----------------------------------------82 Specifications-------------------------------------------------------------------------87...

  • Page 3: General

    TC-700 Service Manual General 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. User Safety Information The following general safety precautions as would normally apply, should be observed during all phases of operation, service and repair of this equipment.

  • Page 4: Brief Introduction

    TC-700 Service Manual Brief Introduction Control Knob and Function Key PTT Key（Push-To-Talk Key） Select transmit/receive mode. Press and hold PTT, radio operates in transmit mode. Release PTT, radio returns to receive mode. SK1 Key Side Key1, programmable key SK2 Key...
  • Page 5 TC-700 Service Manual Power/Volume Control Knob Rotate the Power/Volume Control Knob clockwise to turn the radio on; fully counter clockwise to turn the radio off. Increase or decrease volume by adjusting the volume control accordingly. (10) LED Indicator Red LED glows while transmitting; green LED glows while receiving; red LED flashes when the battery voltage is low.

  • Page 6: Software Specification

    TC-700 Service Manual Software Specification Specification Conventional Mode 1. Mechanical Knob (16 channels) VHF：136～174MHz UHF：300～350MHz，350～390MHz，400～450MHz，400～470MHz 420～470MHz，440～490MHz，470～520MHz，450～520MHz Channel Spacing: 25/20/12.5KHz (programmable) 3. Step: 2.5/5/6.25KHz 4. LED Indicator: Red/Green/Orange 5. 3 Programmable Function Keys 6. CTCSS/CDCSS Encode & Decode 7. DTMF Encode 8.
  • Page 7 TC-700 Service Manual modes will be automatically activated when All Reset is completed). Frequency settings are shown as follows: Selected F1 (MHz) F2 (MHz) F3 (MHz) F4 (MHz) F5 (MHz) Frequency Band(MHz) Channel TX1:136 TX2:145.5 TX3:155 TX4:164.5 TX5:174 136～174 (V) RX1:136.1...
  • Page 8 TC-700 Service Manual 3. Wireless Clone Mode Select Wireless Clone from Optional Features in programming software, turn the power on while holding down PTT and SK1 key simultaneously for 2 seconds, then the source and target radios enter wireless clone mode with orange LED flashing one time（After the source and target radios are turned on and stay in the same channel, hold down PTT key on the source radio to begin cloning）.
  • Page 9 TC-700 Service Manual (7) Frequency Setting 5 point tuning（MHz） TX: { TX1,TX2,TX3,TX4,TX5 RX: { RX1,RX2,RX3,RX4,RX5 3 point tuning（MHz） TX: { TX1, TX3, TX5 RX: { RX1, RX3, RX5 1 point tuning（MHz） TX: { RX:{ First Group of Adjustment Items Channel No.
  • Page 10 TC-700 Service Manual Second Group of Adjustment Items Adjustment Channel No. Item Remarks 25KHz 20KHz 12.5KHz RX sensitivity 5 point tuning 1 point tuning AK2346 volume (RX) 1 point tuning (wide band) 1 point tuning (narrow band) 3 point tuning...

  • Page 11: Circuit Description

    TC-700 Service Manual Circuit Description Power Supply Power supply of the radio is derived from the battery, which supplies battery B+ after passing through fuse 3A and then feeds through power switch. The power supplies voltage for three AVRs. IC504 supplies 5V (M5V) voltage for the control circuit.

  • Page 12: Pll Circuit

    TC-700 Service Manual 1. PLL Circuit Step frequency of PLL can be 2.5 KHz, 5.0 KHz or 6.25 KHz. A 16.8MHz reference oscillator signal is divided at IC301 by a counter to generate a 2.5 KHz, 5.0 KHz or 6.25 KHz reference frequency. Output signal from VCO is buffer amplified by Q301 and divided at IC301 by a frequency divider.
  • Page 13 TC-700 Service Manual 4. Narrow band/Wide band Switch Circuit Pin WCON and NCON of IC500 outputs wide band (high level) and narrow band (low level) controlling signal respectively to turn on corresponding diode-connector, and to choose ceramic filter CF201 (wide band) or CF202 (narrow band) to filter useless spurious signal.
  • Page 14 TC-700 Service Manual Base Band and Signaling System The block diagram of signaling section is shown as figure 5. Fig. 5 AF and Signaling Circuit 1. CTCSS/CDCSS Transmit: CTCSS/CDCSS signaling produced by CTCSS-PLL pass a low pass filter and then enters VCXO.
  • Page 15 TC-700 Service Manual Control System The IC500 CPU operates at 9.8304 MHz. The block diagram of MCU control system is shown as following： EEPROM Fig.6 MCU Block Diagram Circuit in this section is mainly comprised of MCU, EEPROM etc. MCU control circuit accomplishes the following functions: accomplish the reset initialization according to the programmed feature of the radio when power on;...

  • Page 16: Cpu Pins

    TC-700 Service Manual CPU Pins CPU pins are as follows: MCU Port Name Port Name Input/Output Features P94/DA1 APC/TV Automatic Power Control DTMF/2-5Tone/Beep tone output/ ALARM tone P93/DA0 TONEO output P92/TB2IN SHIFT Clock beat-frequency BYTE BYTE CNVSS CNVSS P87/XCIN P86/XCOUT...
  • Page 17 TC-700 Service Manual COM1 COM2 P57/RDY EEDAT EEPROM DATA, date input/output. P56/ALE EECLK EEPROM CLK P55/HOLD P54/HLDA AFDIR AK2346 DIR P53/BLCK AFSCK 2346 SCLK P52/RD P51/BHE AFDT 2346 TDATA P50/WR P47/CS3 CODIO Common date control (AK2346 DATA). P46/CS2 EXT-MIC P45/CS1...
  • Page 18 TC-700 Service Manual P15/INT3 Top Key DC-Switch PLL_UL PLL unlock detect PLL_STB PLL strobe output MICMUTE MICMUTE P07/D7 Option1 Programming cable detect. P06/D6 PLL_DATA PLL date input P05/D5 PLL_CLK PLL clock output P04/D4 Receive/transmit control P03/D3 APC-Switch P02/D2 P01/D1 Side Key1...

  • Page 19: Parts List

    TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3001050000000 Chip resistor 0402 0Ω R147 3001050000000 Chip resistor 0402 0Ω R254 3001050000000 Chip resistor 0402 0Ω R303 3001050000000 Chip resistor 0402 0Ω...
  • Page 20 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3001051020010 Chip resistor 0402 1KΩ R522 3001051020010 Chip resistor 0402 1KΩ R534 3001051020010 Chip resistor 0402 1KΩ R550 3001051020010 Chip resistor 0402 1KΩ...
  • Page 21 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3001051040010 Chip resistor 0402 100KΩ R242 3001051040010 Chip resistor 0402 100KΩ R253 3001051040010 Chip resistor 0402 100KΩ R310 3001051040010 Chip resistor 0402 100KΩ...
  • Page 22 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3001051850000 Chip resistor 0402 1.8MΩ R645 3001052200000 Chip resistor 0402 22Ω R104 3001052200000 Chip resistor 0402 22Ω R107 3001052200000 Chip resistor 0402 22Ω...
  • Page 23 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3001053910000 Chip resistor 0402 390Ω R304 3001053910000 Chip resistor 0402 390Ω R314 3001053920010 Chip resistor 0402 3.9KΩ R106 3001053940000 Chip resistor 0402 390KΩ...
  • Page 24 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3001055130010 Chip resistor 0402 51KΩ R479 3001055620000 Chip resistor 0402 5.6KΩ R117 3001055620000 Chip resistor 0402 5.6KΩ R149 3001055620000 Chip resistor 0402 5.6KΩ...
  • Page 25 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3099080398000 Chip resistor 1206 0.39Ω R127 3101050400010 Chip capacitor 0402 4PF C202 3101050400010 Chip capacitor 0402 4PF C233 3101050400010 Chip capacitor 0402 4PF...
  • Page 26 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3101051020010 Chip capacitor 0402 1000PF C331 3101051020010 Chip capacitor 0402 1000PF C332 3101051020010 Chip capacitor 0402 1000PF C346 3101051020010 Chip capacitor 0402 1000PF...
  • Page 27 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3101051040060 Chip capacitor 0402 0.1UF C213 3101051040060 Chip capacitor 0402 0.1UF C214 3101051040060 Chip capacitor 0402 0.1UF C215 3101051040060 Chip capacitor 0402 0.1UF...
  • Page 28 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3101051510000 Chip capacitor 0402 150PF(±5%) C105 3101051510000 Chip capacitor 0402 150PF(±5%) C258 3101051510000 Chip capacitor 0402 150PF(±5%) C473 3101051530010 Chip capacitor 0402 0.015UF...
  • Page 29 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3101054710010 Chip capacitor 0402 470PF C154 3101054710010 Chip capacitor 0402 470PF C209 3101054710010 Chip capacitor 0402 470PF C212 3101054710010 Chip capacitor 0402 470PF...
  • Page 30 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3101061020000 Chip capacitor 0603 1000PF C111 3101061020000 Chip capacitor 0603 1000PF C135 3101061020000 Chip capacitor 0603 1000PF C349 3101061030010 Chip capacitor 0603 0.01UF...
  • Page 31 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3104071560020 Tantalum capacitor 0805 15UF C637 3104072250010 Tantalum capacitor 0805 2.2UF C327 3104072260010 Tantalum capacitor 0805 22UF C470 3104074750030 Tantalum capacitor 0805 4.7UF...
  • Page 32 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3221506601000 Chip ferrite bead 0603 600Ω±25 L314 3221506601000 Chip ferrite bead 0603 600Ω±25 L316 3221506601000 Chip ferrite bead 0603 600Ω±25 L401 3221507221000 Chip ferrite bead 0805 220Ω±25...
  • Page 33 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3304060300040 Varactor HVC362TRFE D209 3304060300040 Varactor HVC362TRFE D210 3307110100070 LED KPT-1608SR D505 3307110100080 LED KPT-1608SG D506 3399990000080 Zener diode EDZTE616.8B ZD101 3399990000080 Zener diode EDZTE616.8B...
  • Page 34 TC-700 Service Manual TC-700 Parts List 1 TC-700 VHF Parts list 1 Material No. Description Qty. Ref. No. Address 3603002005440 IF processor TA31136FNG IC204 3604025004350 PLL ADF4111BRUZ 1.2G IC301 3605002057290 Operational amplifier TC75W51FU IC402 3605002057290 Operational amplifier TC75W51FU IC404 3605002057290...
  • Page 35 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3001050000000 Chip resistor 0402 0Ω C488 3001050000000 Chip resistor 0402 0Ω R147 3001050000000 Chip resistor 0402 0Ω R233 3001050000000 Chip resistor 0402 0Ω...
  • Page 36 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3001051020010 Chip resistor 0402 1KΩ R522 3001051020010 Chip resistor 0402 1KΩ R534 3001051020010 Chip resistor 0402 1KΩ R550 3001051020010 Chip resistor 0402 1KΩ...
  • Page 37 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3001051040010 Chip resistor 0402 100KΩ R430 3001051040010 Chip resistor 0402 100KΩ R448 3001051040010 Chip resistor 0402 100KΩ R475 3001051040010 Chip resistor 0402 100KΩ...
  • Page 38 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3001051840000 Chip resistor 0402 180KΩ R447 3001051850000 Chip resistor 0402 1.8MΩ R645 3001052200000 Chip resistor 0402 22Ω R104 3001052200000 Chip resistor 0402 22Ω...
  • Page 39 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3001053930000 Chip resistor 0402 39KΩ R484 3001053940000 Chip resistor 0402 390KΩ R449 3001053940000 Chip resistor 0402 390KΩ R492 3001054320000 Chip resistor 0402 4.3KΩ...
  • Page 40 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3001055620000 Chip resistor 0402 5.6KΩ R149 3001055630000 Chip resistor 0402 56KΩ R472 3001055630000 Chip resistor 0402 56KΩ R473 3001056810000 Chip resistor 0402 680Ω...
  • Page 41 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3005051020010 Resistor array 0402 1K*4 CP526 3099080398000 Chip resistor 1206 0.39Ω R125 3099080398000 Chip resistor 1206 0.39Ω R126 3099080398000 Chip resistor 1206 0.39Ω...
  • Page 42 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3101051020010 Chip capacitor 0402 1000PF C409 3101051020010 Chip capacitor 0402 1000PF C462 3101051020010 Chip capacitor 0402 1000PF C497 3101051020010 Chip capacitor 0402 1000PF...
  • Page 43 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3101051040060 Chip capacitor 0402 0.1UF C334 3101051040060 Chip capacitor 0402 0.1UF C337 3101051040060 Chip capacitor 0402 0.1UF C338 3101051040060 Chip capacitor 0402 0.1UF...
  • Page 44 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3101052210010 Chip capacitor 0402 220 C602 3101052210010 Chip capacitor 0402 220 C603 3101052220010 Chip capacitor 0402 2200pF C447 3101052220010 Chip capacitor 0402 2200pF...
  • Page 45 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3101054710010 Chip capacitor 0402 470 C343 3101054710010 Chip capacitor 0402 470 C358 3101054710010 Chip capacitor 0402 470 C362 3101054710010 Chip capacitor 0402 470...
  • Page 46 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3101061000000 Chip capacitor 0603 10PF C323 3101061010010 Chip capacitor 0603 100PF C131 3101061020000 Chip capacitor 0603 1000PF C117 3101061020000 Chip capacitor 0603 1000PF...
  • Page 47 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3104074750030 Tantalum capacitor 0805 4.7UF C316 3104074750030 Tantalum capacitor 0805 4.7UF C336 3104074750030 Tantalum capacitor 0805 4.7UF C344 3104074750030 Tantalum capacitor 0805 4.7UF...
  • Page 48 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3221507221000 Chip Ferrite Bead 0805 220Ω±25 L106 3221507221000 Chip Ferrite Bead 0805 220Ω±25 L501 3221507600000 Chip Ferrite Bead 0805 60Ω±25% L110 3231301250000 Air-core inductor E2-0.30*1.2*5TL...
  • Page 49 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3399990000080 Zener diode EDZTE616.8B ZD404 3399990000080 Zener diode EDZTE616.8B ZD405 3399990000080 Zener diode EDZTE616.8B ZD407 3399990000110 Diode ISR154-400D D501 3399990000260 Diode HSM88ASTLENE...
  • Page 50 TC-700 Service Manual TC-700 Parts List 1 TC-700 UHF Parts List 1 Material No. Description Qty. Ref. No. Address 3605008005070 Operational amplifier NJM2904V IC101 3605017005540 Operational amplifier 1.7V TDA28 IC401 Power management IC(Voltage regulator) 3608015000000 IC502 XC6201P5 Power management IC(Voltage regulator)

  • Page 51: Adjustment Description

    TC-700 Service Manual Adjustment Description Adjust the radio by PC programming software or by manual adjustment. In manual adjustment mode, the adjustment method is shown as follows: (Refer to “ Software Specification” for the manual adjustment mode) Required Test Instrument...
  • Page 52 TC-700 Service Manual PTT/SK1 PTT→ Increase SK1→ Decrease PTT/SK1 is pressed to adjust upward/downward. Red LED glows indicating the maximum adjust value and green LED indicating the minimum value. Hold down the key to increase/decrease the adjust value continuously. Press PTT key to save the BATT LOW and SQL settings, then green LED glows once.
  • Page 53 Adjustment Method Turn the power on by holding down TK and SK2 key simultaneously for 2 seconds, the radio enters manual adjust mode with red LED flashes twice. Refer to Manual Adjust Mode in TC-700 Software Specification for more details.
  • Page 54 TC-700 Service Manual Enter the adjust mode. Turn to CH6. Adjust at 3 6. CTCSS PTT key (increase) point (wide band), 1 point (254.1Hz) SK1 key (medium band) and 1 deviation (decrease) High point (narrow band) respectively. Radio Adjust deviation to Enter the adjust mode.
  • Page 55 TC-700 Service Manual When frequency of modulated signal is Group 1 adjusted to 1KHz Enter the adjust mode. and amplitude is 11. VOX Save Turn to CH11. Adjust at 1 adjusted to 45mv, GAIN1 point (wide band). press PTT key to...
  • Page 56 TC-700 Service Manual Enter the adjust mode. Turn to Communication 4. Squelch CH4. Adjust at 5 point (wide Test Set Adjust level to Level 3 band), 1 point (medium band) RX TEST Save -125dBm，press (SQUELCH) and 3 point (narrow band) HPF：300HZ...

  • Page 57: Trouble-Shooting Flow Chart

    TC-700 Service Manual Trouble-shooting Flow Chart MCU Check Normal power-on The RF circuit can’ t Check the alert tone? be driven. control circuit Replace Speaker works the speaker well? Check the Read 9.8304MHz works reading circuit available? normally? Reset Q501...
  • Page 58 TC-700 Service Manual...
  • Page 59 TC-700 Service Manual Tx Circuit No output power Power supply Check power supply circuit works well? The current is Control voltage is Control voltage is Check Q502 normal? normal? normal? High Check transistor offset Check drive voltage and low pass...
  • Page 60 TC-700 Service Manual Rx Circuit No recieve Check if the power Check if control voltage Replace 717 supply of AF IC is AFCO is normal. normal? Replace IC Check if the input of Check if the output Replace base band IC is normal.

  • Page 61: Disassembly And Assembly For Repair

    TC-700 Service Manual Disassembly and Assembly for Repair Remove the case assembly from the chassis (as shown in Fig. 1) 1. Remove the volume knob and channel knob . ① 2. Remove the two screws ② 3. Lift the both sides of chassis from the case assembly ③...
  • Page 62 TC-700 Service Manual 4. Remove the solder of the antenna terminal with a soldering iron ⑿ 5. Remove the solder of the positive and negative terminal on the battery’ s connector with a soldering iron ⒀ 6. Lift and remove the main unit board ⒁ from the chassis.
  • Page 63 TC-700 Service Manual 5. Press downward the chassis ⑤, enabling the chassis and the case to fit together. Note: If the packing of the SP/MIC does not come to the correct position after attaching the chassis to the case assembly, reposition the packing with your fingers.

  • Page 64: Exploded View

    TC-700 Service Manual Exploded View TX-RX Unit...

  • Page 65: Parts List

    TC-700 Service Manual TC-700 Parts list 2 Material No. Description Qty. PTT key cover 6000135000000 PTT silica rubber key 6100068000000 Model label 8600700500000 Metal HYT logo 8600700500100 Encode switch 6000076000020 Inner liner knob 6201006000000 Light guide 6000136000000 3M adhesive tape...
  • Page 66 TC-700 Service Manual 5205000000190 Earpiece jack 3920450300000 Demodulator Ceramic filter 3804045030010 Battery latch 6000128000000 Battery latch baffle 6201078000000 7000036000000 Spring Front case of main unit 6000133100030 6000127000000 Earpiece cover stopper 7102004021030 Self-tapping screw 7102504000300 Machine screw 7103006001000 Machine screw 7102508000000...

  • Page 67: Packing

    TC-700 Service Manual Packing...

  • Page 68: Pcb View

    TC-700 MCU PCB View Top Layer...
  • Page 69 TC-700 MCU PCB View Bottom Layer...
  • Page 70 TC-700 VHF PCB View Top Layer...
  • Page 71 TC-700 VHF PCB View Bottom Layer...
  • Page 72 TC-700 UHF PCB View (RF Board) Top Layer...
  • Page 73 TC-700 UHF PCB View (RF Board) Bottom Layer...

  • Page 74: Block Diagram

    TC-700 Block Diagram...

  • Page 75: Level Diagram

    TC-700 Level Diagram TC－700 Level Diagram Rx Section -109dBm -120dBm 130mVrms -113dBm -120dBm -101dBm -103dBm -105dBm 250mVrms 300mVrms 100mVrms C251 C236 C238 IC202 XF203 IC204 IC408 IC202 IC404 C487 C254 Q207 C135 C312 C241 Q206 C230 Q204 K501 1st Local...

  • Page 76: Schematic Diagram

    TC-700 VHF Schematic Diagram (Base Band & AF Amplifier) Base Band & AF_AMP R468 C602 ZD401 SWB+ SWB+ 220p EDZ6.8B K501 F501 L501 J502 BLM21P221SG Q404 IC401 J401 J501 R601 2SK1824 R604 R607 TDA2822 4.7k 4.7K C609 BATTSEL C608 R602...
  • Page 77 TC-700 VHF Schematic Diagram (CPU) TC700-V Schematic Diagram (CPU) R611 C535 D503 AUX2 SWB+ SWB+ J504 R649 1SS373 470p C537 C536 C533 C532 470p 10u6.3 470p Q601 2SK1824 R610 IC504 AUX1 AUX1 CON5 XC6201P502R J403 COM4 COM4 COM3 COM3 COM1...
  • Page 78 TC-700 VHF Schematic Diagram (Tx & Rx) ANT100 Antenna V RF &TX C137 C139* C141* ANT SW C131* C135 1000p D102 L111 L112 L118 *L119 L113* L114* TX FINAL AMP MA77 Q104 C117 L115 L107* RD07 R114* C119 C125* C126...
  • Page 79 TC-700 VHF Schematic Diagram (VCO/PLL) 700V PLL&VCO C302 R301 C301 1000p C359 2.73V L301 L322 C358 R306 R302 C361 C360 1000p 220k C303 Q301 2SC5108(Y) 10p(B) PLL_Fin RF AMP T: 3.73V VCO/TX R: 0 V D303 R305 L321 Q302 HVC362 6.8u...
  • Page 80 TC-700 UHF Schematic Diagram (Base Band & AF Amplifier) Base Band & AF_AMP R468 SWB+ SWB+ C602 ZD401 K501 220p L501 EDZ6.8B F501 J502 BLM21P221SG R604 R436 J401 J501 R601 IC401 TDA2822 8.2K Q404 BATTSEL R602 R456 C517 C518 C608...
  • Page 81 TC-700 UHF Schematic Diagram (CPU) TC700-U Schematic Diagram (CPU) J504 D503 C535 1SS373 470p SWB+ SWB+ CON5 C537 C533 C532 面 右下角附件口注释： C536 PCB top 470p 470p 从左至右依次为： （ 10u6.3 COM4 ）、 （ PIN33 COM3 R611 IC504 ）、 （ PIN34...
  • Page 82 TC-700 UHF Schematic Diagram (Tx&Rx) TC700-U Schematic Diagram (TX&RX) C141 C137 C139 ANT100 1.5P ANTENNA R120 C131 D102 C135 L112* L113* L114* 100P MA77 470p L107* C117 R114* C163* 2.2n 1000p Q104 C136* C138* C140* 4.5P C142* L115 2SK3476 1.5P...
  • Page 83 TC-700 UHF Schematic Diagram (VCO&PLL) C302 R301 C301 C359 TC700-U Schematic Diagram (VCO&PLL) L322 470p C358 L301 470p R302 C361 C360 Q301 150K 2SC5108(Y) C303 10p(B) R305 D303 C311 C355 L321 3.8V C157 100N 470p 0.1U HVC350B C312 R:2.3V RFosc...

  • Page 84: Description Of Tc-700 Desktop Charger

    Description of TC-700 Desktop Charger General Description The charger is developed & designed for TC-700 wireless series. The charger adopts bq2000T— — a programmable multi-chemistry fast-charge management IC. The charger is for fast-charge management of nickel cadmium (Ni-Cd), nickel metal-hydride (Ni-MH), or lithium-ion (Li-Ion) batteries in single or multi-chemistry applications.
  • Page 85 TC-700 Service Manual Open-drain output that indicates the charging status by turning on, turning off, or flashing an external LED. BAT: Battery-voltage input Battery-voltage sense input. A simple resistive divider, across the battery terminals, generates this input. TS: Temperature-sense input Input for an external battery-temperature monitoring circuit.
  • Page 86 TC-700 Service Manual Figure Ⅲ Temperature Monitoring Configuration 3. Peak Voltage Detection (Ni-Cd, Ni-MH battery) (PVD) bq2000T adopts PVD method to stop the charging of Ni-Cd and Ni-MH batteries. It continuously samples the voltage of BAT pin which reflects the voltage of the whole battery. Bq2000T begins PVD function if this voltage is less than the maximum sampling voltage 3.8mv (PVD).

  • Page 87: Specifications

    TC-700 Service Manual desired fast-charge current (I If the voltage at the SNS is lower than VSNSLO or higher than VSNSHI, the bq2000T switches the MOD output high to pass charge current to the battery. When the SNS voltage is less than VSNSL or greater than VSNSHI, the bq2000T switches the MOD output low to shut off charging current to the battery.
  • Page 88 TC-700 Service Manual 2. Ni-MH Battery 1) Fast charge: current: 850±100mA; LED indicator: red; switch to supplementary charging when rate of temperature rise dT/dt=0.9～1/min or the temperature rises to 50℃. 2) Supplementary charging: charging current: 65±10mA; LED indicator: green; switch to trickle charging if the supplementary charging time reaches or exceeds MTO.

  • Page 89: Specifications

    TC-700 Service Manual Specifications General VHF: 136-174MHz UHF:300-350MHz,350-390MHz, 400-450MHz, Frequency Range 420-470MHz 440-490MHz,470-520MHz Number of Channels Channel Spacing 25 /20/12.5 KHz Operating Voltage 7.4 V Battery Life About 14 hours ( 5-5-90 duty cycle) Operating Temperature Range -30℃ — +60℃...

Table of Contents