Hytera TC-700 Service Manual
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Hytera TC-700 Service Manual

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Contents
General.......................................................................................
Brief Introduction........................................................................
Software Specification...................................................................
Circuit Description.....................................................................
CPU Pins....................................................................................
Part List 1.................................................................................
Adjustment Description................................................................
Trouble-shooting Chart................................................................
Disassembly and Assembly for Repair..........................................
Exploded View.............................................................................
Part List 2....................................................................................
Packing......................................................................................
PC Board View...........................................................................
Level Diagram...........................................................................
Schematic Diagram......................................................................
Description of TC-700 Desktop Charger..........................................
Specifications..............................................................................

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  • Page 1: Table Of Contents

    General…………………………………………………………………………… Brief Introduction……………………………………………………………… Software Specification…………………………………………………………. Circuit Description…………………………………………………………… CPU Pins………………………………………………………………………… Part List 1……………………………………………………………………… Adjustment Description………………………………………………………. Trouble-shooting Chart………………………………………………………. Disassembly and Assembly for Repair…………………………………… Exploded View………………………………………………………………….. Part List 2………………………………………………………………………... Packing………………………………………………………………………….. PC Board View………………………………………………………………… Level Diagram………………………………………………………………… Schematic Diagram……………………………………………………………. Description of TC-700 Desktop Charger…………………………………… Specifications…………………………………………………………………...

  • Page 2: Revision History

    TC-700 General Revision History Edition Release Date Revised Content 8130070000000 2005/09/22 Initial release 2006/09/22 1) 2-Tone/5-Tone, add HDC1200 and HDC2400 2) Update schematic diagram and part list 3) Update exploded view, part list and diagram for disassembly and assembly General...

  • Page 3: Brief Introduction

    TC-700 Brief Introduction 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 4 TC-700 Brief Introduction 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 5: Software Specification

    TC-700 Software Specification Software Specification Specification: Conventional Mode 1. Mechanical Knob (16 channels) VHF:136～174MHz UHF:400-470MHz, 450～520MHz 2. Channel Spacing: 25/20/12.5KHz (Wide/Medium/Narrow bandwidth compatible) 3. Step: 2.5/5/6.25KHz 4. LED Indicator: Red/Green 5. 3 Programmable Function Keys 6. CTCSS/CDCSS Encode & Decode 7.
  • Page 6 TC-700 Software Specification selected channel and press PTT, the radio data is all reset (All clone modes will be automatically activated when All Reset is completed). Frequency settings are shown as follows: Channel data is shown as follows: RX Frequency...
  • Page 7 TC-700 Software Specification Wireless Clone Mode Select wireless clone from optional functions 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 on the source radio to begin cloning）.
  • Page 8 TC-700 Software Specification TK key Use to toggle the channel bandwidth among 25 KHz, 20 KHz and 12.5 KHz. Red LED flashes once when the bandwidth is 25 KHz. 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.
  • Page 9 TC-700 Software Specification First Group of Adjustment Items Channel No. Adjustment Item Remarks 25KHz 20KHz 12.5KHz TX power LOW 5 point tuning CDCSS PLL balance 3 point tuning (wideband) 1 point tuning CDCSS deviation 3 point tuning (wideband) 1 point tuning...
  • Page 10 TC-700 Software Specification Second Group of Adjustment Items Adjustment Channel No. Remarks Item 25KHz 20KHz 12.5KHz RX sensitivity 5 point tuning 1 point tuning AK2346 volume (RX) 1 point tuning (wideband) 1 point tuning (narrowband) 1 point tuning Squelch level 3 (OPEN)

  • Page 11: Circuit Description

    TC-700 Circuit Description Circuit Description 1. 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 TC-700 Circuit Description 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 Circuit Description 3） IF Amplifier The first IF signal is amplified by Q206 before passing through crystal filter and by Q204 after crystal filter and then enters IF processing chip IC204. The signal from IC204 is mixed with the second oscillator signal again in IC204 to create a 450 KHz second IF signal.
  • Page 14 TC-700 Circuit Description 3） Antenna Switch and LPF Output signal from RF amplifier passes through a low-pass filter network and a transmit/receive switch circuit comprised of D102，D103 and D104 before it reaches the antenna terminal. D103 and D104 is turned on (conductive) in transmit mode and off (isolated) in receive mode.
  • Page 15 TC-700 Circuit Description 3） MSK MSK signal produced by base band processing IC enters VCO together with AF Transmit: signal for modulation. MSK input of demodulating IC is sent to AK2346 for demodulation after being Receive: amplified. The demodulated signal is then sent to MCU for decoding.

  • Page 16: Cpu Pins

    TC-700 CPU Pins CPU Pins 1. 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 P93/DA0 TONEO tone output P92/TB2IN SHIFT Clock beat-frequency BYTE BYTE CNVSS CNVSS P87/XCIN...
  • Page 17 TC-700 CPU Pins 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 P45/CS1 SAVE...
  • Page 18 TC-700 CPU Pins 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 TC-700 Part List 1 TC-700 Part List 1...

  • Page 20: Adjustment Description

    TC-700 Adjustment Description 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 Radio Communication Test Set...
  • Page 21 TC-700 Adjustment Description (3) SK2 key Used to set the frequency. 1 point tuning is used to adjust center frequency, 3 point tuning adjusts F1, F3, F5 and 5 point tuning adjusts F1-F5. The frequency toggles from low frequency to high frequency.
  • Page 22 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 23 TC-700 Adjustment Description Enter the adjust mode. Turn to CH6. Adjust at 3 6. CTCSS PTT key (increase) point (wideband), 1 point (254.1Hz) SK1 key (medium band) and 1 deviation (decrease) High point (narrowband) respectively. Radio Adjust deviation to Enter the adjust mode.
  • Page 24 TC-700 Adjustment Description Adjust power to 5W(4W)±0.1W Enter the adjust mode. PTT key (increase) Group 1 11. TX power Radio VHF: 5W, Turn to CH13. Adjust at 5 SK1 key (decrease) HIGH Communication UHF: 4W point (wideband). Test Set TX TEST Enter the adjust mode.
  • Page 25 TC-700 Adjustment Description Receiver Item Condition Test Method Purpose Instrument Enter the adjust mode. Turn to PTT key Adjust level to 1. RX CH1. SK1 key 119dBm. sensitivity Adjust at 5 point (wideband). SINAD≥12dB Enter the adjust mode. Turn to PTT key When Max.

  • Page 26: Trouble-Shooting Chart

    TC-700 Disassembly and Assembly for Repair Trouble-shooting Chart MCU Check Normal power-on Check the The RF circuit can’t alert tone? be driven. control circuit Replace Speaker works the speaker well? Check the Read circuit of read 9.8304MHz works available? frequency...
  • Page 27 TC-700 Disassembly and Assembly for Repair Check Power supply is Exchange normal? Q306 Exchange Oscillator CV voltage in Check if Q305 Q305 Rx is normal? works well. Check Check if Q304 output normally? Q304 Check Check if feedback Q301 is normal.
  • Page 28 TC-700 Disassembly and Assembly for Repair No output power Check power Power supply supply circuit works well? The current is Control voltage is Check Q502 normal? normal? High Check transistor offset Check drive voltage and low pass stage network Repair the...
  • Page 29 TC-700 Disassembly and Assembly for Repair No recieve Check if the power Check if control voltage Exchange 717 supply of AF IC is AFCO is normal. normal? Exchange IC Check if the output Check if the input of Exchange base band IC is normal.

  • Page 30: Disassembly And Assembly For Repair

    TC-700 Disassembly and Assembly for Repair Disassembly and Assembly for Repair 1. Remove the case assembly from the chassis (as shown in Fig. 1) 1. Remove the volume knob and channel knob①. 2. Remove the two screws ②. 3. Lift the both sides of chassis from the case assembly ③.
  • Page 31 TC-700 Disassembly and Assembly for Repair 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. Fig. 3 Cautions for assembly: 4.
  • Page 32 TC-700 Disassembly and Assembly for Repair Fig. 5 Fig. 6...

  • Page 34: Exploded View

    TC-700 Exploded View Exploded View TX-RX Unit...
  • Page 36 5202003100010 TC-700S 3P battery connector socket 1.00 6000137000000 TC-700S Mic holder Black 1.00 6300016000000 TC-700S Aluminum chassis 1.00 7300001000000 TC700S PTT metal dome (3-key) 1.00 4210047000000 TC-700 Key board connection cable 47mm 0.50 4100700101100 TC-700S PT PCB FR4 0.6T/2L 1.00 7500114000000 TC500 Gap pad 1.00 4400000000000 SMA-type MSMA1551D5-001-NT3G-50 connector Male 1.00...
  • Page 37 TC-700U(2) Part List 2 6201078000000 TC-700S Battery latch baffle 1.2mmSUS304 1.00 7000036000000 TC-700S Spring Ф0.35*Ф2.3*10mm 2.00 6000133000000 TC-700S Main unit front case Black 1.00 7101904020020 Self-tapping ST1.9*4.0mm 13.00 7102504000300 Machine screw M2.5*4.0mm Ultra-thin cross-head 2.00 7102004520000 Self-tapping ST2.0*4.5mm pan head 2.00 7103006001000 Machine screw M3.0*6.0mm pan head 2.00...

  • Page 38: Packing

    TC-700 Packing Packing...

  • Page 40: Description Of Tc-700 Desktop Charger

    Description of TC-700 Desktop Charger Ⅰ. 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 42 Description of TC-700 Desktop Charger Pin Names and Descriptions: SNS: Current-sense input Enables the bq2000T to sense the battery current via the voltage developed on this pin by an external sense-resistor connected in series with the battery pack. Vss: System ground...
  • Page 44 Description of TC-700 Desktop Charger Charge Termination 1. Maximum Charge Time (NiCd, NiMH, and Li-Ion) The bq2000T sets the maximum charge-time through pin RC. With the proper selection of external resistor and capacitor, various time-out values may be achieved. Figure Ⅱshows a typical connection.
  • Page 46 Description of TC-700 Desktop Charger Figure Ⅳ Battery Voltage Divider For Li-Ion battery packs, the resistor values R and R are calculated by the following equation: Where N is the number of cells in series. The end-to-end input impedance of this resistive divider network should be at least 200KΩ...
  • Page 48 Description of TC-700 Desktop Charger Ⅲ. Specifications 1. Output voltage and current Input: 12±3V 1000mA Output: 8-12V 20～1000mA (Input: 12V 1000mA DC Output: 800mA DC） 2. Charging current 1) Li-ion battery Fast charging current: 800±200mA Minimum charging current: 75±20mA 2) Ni-MH battery Fast charging current: 850±100 mA...

  • Page 50: Specifications

    TC-700 Specifications Specifications General VHF: 136-174MHz Frequency Range UHF:300-350MHz,350-390MHz, 400-450MHz, 420-470MHz 440-490MHz,470-520MHz Number of Channels Channel Spacing 25 /20/12.5 KHz Operating Voltage 7.5 V Battery Life About 14 hours ( 5-5-90 duty cycle) Operating Temperature Range -20 ℃ — +50℃...

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