HYT TC-508 Service Manual
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HYT TC-508 Service Manual

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  • Page 2 Preface This manual describes information related with product repair. To repair the product properly, please read this manual carefully. This manual is applicable to the following model: TC-508...

  • Page 3: Table Of Contents

    Contents Service Manual Contents 1. Introduction ............................2  2. Product Controls ..........................3  3. Programmable Key Functions ......................4  4. Software Specifications ........................5  5. Circuit Description ........................... 11  6. CPU Pins ............................18  7. Parts List 1 ............................21  8.

  • Page 4: Introduction

    Introduction Service Manual 1. Introduction Intended User This manual is intended for use by qualified technicians only. Safety Information The following safety precautions shall always be observed during operation, service and repair of this equipment. This equipment shall be serviced by qualified technicians only. Use only our supplied or approved antenna.

  • Page 5: Product Controls

    Service Manual Product Controls 2. Product Controls Part Name Part Name ○ ○ PTT Key Battery latch ○ ○ SK1 (programmable) Accessory Jack Cover ○ ○ SK2 (programmable) Accessory Jack ○ ○ Antenna Strap Hole ○ ○ Channel Selector Knob Belt clip Radio On-Off/Volume Control Knob ○...

  • Page 6: Programmable Key Functions

    Programmable Key Functions Service Manual 3. Programmable Key Functions For enhanced convenience, you may request your dealer to program the keys SK1 and SK2 as shortcuts to the functions listed below: Shortcut Key Function Adjusting the Power Level To adjust power level quickly. Battery Strength Indicator To show the remaining battery strength To lock the channel which would disable the Channel Selector...

  • Page 7: Software Specifications

    Service Manual Software Specifications 4. Software Specifications Status Indication See the table below for LED and alert tone indications: Item Indication To enter Wired Clone Mode turn on the source radio with SK1 The LED on the source radio flashes red once during held down for approximately 2 the power-on process.
  • Page 8 Software Specifications Service Manual Item Indication The LED glows red during transmitting. When TOT timer expires, the radio sounds beep Transmitting tone continuously. A TOT pre-alert tone sounds before the TOT timer expires. Receiving The LED glows green during receiving. The LED flashes green once per second during scanning.
  • Page 9 Service Manual Software Specifications Function List Channel Capacity: 16 Channel Spacing: 25KHz/12.5KHz Channel Scan RX/TX status indication (red/green LED) CTCSS/CDCSS (38 groups of CTCSS, 83 groups of CDCSS, and CTCSS Tail Invert by 180 degrees.) Low battery alert Battery Save Unlock Detection and Emergency Alarm 2 Selectable Squelch Levels Monitor Button...
  • Page 10 Software Specifications Service Manual communication with the programming software. In this mode, radio functions and adjustment parameters can be set through the programming software (including User Version and Factory Version). Wired Clone Mode 4.3.3 Description Wired Clone Mode is an independent mode. To access other modes, you must restart the radio. Wired Clone Mode includes Clone Mode and Factory Clone Mode.
  • Page 11 Service Manual Software Specifications To enter Manual Tune Mode Hold down the PTT and SK1 key for 2 seconds while powering on the radio. The LED glows orange to indicate that the radio has entered the Manual Tune 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).
  • Page 12 Software Specifications Service Manual Short press the SK2 key to decrease the value in step of 1, or hold down this key to decrease the value continuously in steps of 1. The value will remain unchanged once it reaches the allowed minimum value. About several special items TX group: CH8 (TX Low Voltage Threshold) which is related to AD sampling.

  • Page 13: Circuit Description

    Service Manual Circuit Description 5. Circuit Description General Principle Diagram The general circuit is composed of RDA chip circuit, TX circuit, RX circuit, power supply circuit, control circuit, etc. See the block diagram below: B201 SP_JACK PJ-D3027D MICJACK Q407 Q402 Q403 2SC3356 RD01...
  • Page 14 Circuit Description Service Manual signals. The resulting signal is delivered to RDA chip for demodulation. After that, the voice signal from demodulation is output U302 for amplification, which is finally output from the speaker. LDO U619 converts the 7.4V power supply into two 5V, which LDO U621 will convert into two 3.3v power supplies, powering VCC and VDD respectively.
  • Page 15 Service Manual Circuit Description After entering RDA chip via MIC, the voice signal will undergo A/D conversion to get digital signal, which will be delivered to DSP for further processing such as filtering, amplification, amplitude-limiting and pre-emphasizing. Then the resulting voice signal is modulated to the internal VCO and output after being amplified by the driver amplifier.
  • Page 16 Circuit Description Service Manual The modulated RF signal from RDA chip goes to Q407 and Q402 for amplification, and then further amplified by Q403. Then the amplified signal is delivered to low-pass filter to filter out the high-order harmonics. Finally, it is sent via the antenna. The control signal “VT” is used to control the operation of driver amplifier (Q407 and Q402).
  • Page 17 Service Manual Circuit Description ANT LPF D401 D402 RX_EN Q501 AT41511 BPF1 The RF signal is received via the antenna. After going through LPF and amplitude limiter, the signal is amplified by Q501 LNA. The LNA adopts 2SC3356 with current <5mA and its gain is about 12dB. Next, the BPF will remove the interference signal in amplified RF signal.
  • Page 18 Circuit Description Service Manual B201 SP_JACK PJ-D3027D MICJACK AF AMP U302 VOX_DET U613 D656 BATTERY G602 D602 EXT_PTT /EXT_MIC D601 U622 MC9S08AC60 E2ROM SDA/SCL U603 CSS/CODE/INT/SDO /RXON/TXON/SQ/PDN MCU Control Circuit MCU control circuit is composed of MCU, EEPROM, keys, etc. This section has the following functions: to initialize data of the radio and save data to EEPROM;...
  • Page 19 Service Manual Circuit Description TX power supply; (for programming) to communicate with PC via RXD/TXD based on the RS232 protocol, and transmit/receive data to/from PC. RDA Chip Control By controlling the RDA chip, the MCU can realize these services: frequency setting, frequency bandwidth, reference clock, sleep mode, SQ, VOX, squelch, frequency deviation, voice filtering, signaling encoding/decoding, pre-emphasizing, gain control, amplitude limiting, de-emphasizing, etc.

  • Page 20: Cpu Pins

    CPU Pins Service Manual 6. CPU Pins Port Pin No. Port Name Pin Name Function PTC4 Reserved Reserved IRQ/TPMCLK Reserved Reserved RESET RESET Reset PTF0/TPM1CH2 BEEP Tone PTF1/TPM1CH3 VRCR PWM output for frequency adjustment PTF2/TPM1CH4 PWM output for PA APC PTF3/TPM1CH5 Detection pin, CDCSS status output PTF4/TPM2CH0...
  • Page 21 Service Manual CPU Pins Port Pin No. Port Name Pin Name Function Power Supply PTG0/KBI1P0 Detection pin, SQ status check PTG1/KBI1P1 TX_EN TX power supply control PTG2/KBI1P2 RX_EN RX power supply control PTA0 Rotary switch PTA1 Rotary switch PTA2 Rotary switch PTA3 Rotary switch PTA4...
  • Page 22 CPU Pins Service Manual Port Pin No. Port Name Pin Name Function VSSAD VSS_AD Ground (digital) PTD2/KBI1P5/AD External EEPROM 1P10 PTD3/KBI1P6/AD External EEPROM 1P11 PTG3/KBI1P3 Reserved Reserved PTG4/KBI1P4 Reserved Reserved PTD4/TPM2CLK/ BAT_DET Battery detection AD1P12 PTD5/AD1P13 Reserved Reserved PTD6/TPM1CLK/ Reserved Reserved AD1P14 PTD7/KBI1P7/AD...

  • Page 23: Parts List 1

    Service Manual Parts List 1 7. Parts List 1 UHF1 Part No. Description Qty. Ref No. Print No. 3101051020010 Chip capacitor 1000PF K 50V X7R 0402 (RoHS) C102 3101051000020 Chip capacitor 10PF J 50V C0G 0402 (RoHS) C103 3101051000020 Chip capacitor 10PF J 50V C0G 0402 (RoHS) C104 3101051020010 Chip capacitor 1000PF K 50V X7R 0402 (RoHS)
  • Page 24 Parts List 1 Service Manual Part No. Description Qty. Ref No. Print No. 3101051010030 Chip capacitor 100PF J 50V C0G 0402 (RoHS) C203 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS) C209 3101051020010 Chip capacitor 1000PF K 50V X7R 0402 (RoHS) C216 3101051040060 Chip capacitor 0.1UF K 16V X7R 0402 (RoHS)
  • Page 25 Service Manual Parts List 1 Part No. Description Qty. Ref No. Print No. 3101061590010 Chip capacitor 1.5PF B 50V COG 0603 (RoHS) C431 3101063690000 Chip capacitor 3.6PF B 50V COG 0603 (RoHS) C432 3101060100010 Chip capacitor 1PF B 50V C0G 0603 (RoHS) C433 3101063690000 Chip capacitor 3.6PF B 50V COG 0603 (RoHS)
  • Page 26 Parts List 1 Service Manual Part No. Description Qty. Ref No. Print No. 3101051020010 Chip capacitor 1000PF K 50V X7R 0402 (RoHS) C605 3101051040060 Chip capacitor 0.1UF K 16V X7R 0402 (RoHS) C606 3101062250000 Chip capacitor 2.2UF K 10V X5R 0603 (RoHS) C609 3104081060120 Tantalum capacitor 10UF M 16V -55~+125℃...
  • Page 27 Service Manual Parts List 1 Part No. Description Qty. Ref No. Print No. 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS) C656 3101054720000 Chip capacitor 4700PF K 50V X7R 0402 (RoHS) C657 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS) C658 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS)
  • Page 28 Parts List 1 Service Manual Part No. Description Qty. Ref No. Print No. 3303030300000 Schottky diode 40V 30mA 0.26V/1mA (RoHS) D656 3310990000160 ESD protection diode 10 5A/ 8/20uS -40~+85 (RoHS) D657 3310990000160 ESD protection diode 10 5A/ 8/20uS -40~+85 (RoHS) D658 3310990000160 ESD protection diode 10 5A/ 8/20uS -40~+85 (RoHS)
  • Page 29 Service Manual Parts List 1 Part No. Description Qty. Ref No. Print No. 3403008000010 Transistor Vce:50V VIoff:0.5V VIon:3V 100mA (RoHS) Q302 3499000000180 PNP transistor 12V 2.5A 180~270 (RoHS) Q303 3504990000010 MOSFET ID:600mA VGS(th):1.8V 1.4W (RoHS) Q402 3504990000040 PA MOSFET 10uA 25V 10uA 7.2V 7W (RoHS) Q403 3403999000000 Transistor -50V/50V -100mA/100mA 80/80 (RoHS)
  • Page 30 Parts List 1 Service Manual Part No. Description Qty. Ref No. Print No. 3001054730000 Chip resistor 47KΩ J 1/16W 0402 (RoHS) R220 3001051040000 Chip resistor 100KΩ F 1/16W 0402 (RoHS) R221 3001051220000 Chip resistor 1.2KΩ J 1/16W 0402 (RoHS) R310 3001051030000 Chip resistor 10KΩ...
  • Page 31 Service Manual Parts List 1 Part No. Description Qty. Ref No. Print No. 3210305220000 Multi-layer chip inductor 0402 22nH (RoHS) R520 3001050000000 Chip resistor 0Ω J 1/16W 0402 (RoHS) R523 3001052240000 Chip resistor 220KΩ J 1/16W 0402 (RoHS) R602 3001051040000 Chip resistor 100KΩ...
  • Page 32 Parts List 1 Service Manual Part No. Description Qty. Ref No. Print No. 3605008005070 Operational amplifier 3~32V 300mW 100dB (RoHS) U401 3612031000510 Memory EEPROM 16KB 1.7~5.5V (RoHS) U603 3605008005070 Operational amplifier 3~32V 300mW 100dB (RoHS) U613 3608015000060 Power management IC LDO 5V 300mA (RoHS) U619 3608015000210 Power management IC LDO 12V 3.3V 300mA (RoHS)
  • Page 33 Service Manual Parts List 1 Print Part No. Description Qty. 3101051020010 Chip capacitor 1000PF K 50V X7R 0402 (RoHS) C102 3101051000020 Chip capacitor 10PF J 50V C0G 0402 (RoHS) C103 3101051000020 Chip capacitor 10PF J 50V C0G 0402 (RoHS) C104 3101051020010 Chip capacitor 1000PF K 50V X7R 0402 (RoHS) C105...
  • Page 34 Parts List 1 Service Manual Print Part No. Description Qty. 3101051040060 Chip capacitor 0.1UF K 16V X7R 0402 (RoHS) C217 3101051050000 Chip capacitor 1UF K 6.3V X5R 0402 (RoHS) C218 3101051020010 Chip capacitor 1000PF K 50V X7R 0402 (RoHS) C219 3101051030020 Chip capacitor 0.01UF K 25V X7R 0402 (RoHS) C220...
  • Page 35 Service Manual Parts List 1 Print Part No. Description Qty. 3101051030020 Chip capacitor 0.01UF K 25V X7R 0402 (RoHS) C437 3101063300000 Chip capacitor 33PF J 50V COG 0603 (RoHS) C438 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS) C440 3101051040060 Chip capacitor 0.1UF K 16V X7R 0402 (RoHS) C441...
  • Page 36 Parts List 1 Service Manual Print Part No. Description Qty. 3101051030020 Chip capacitor 0.01UF K 25V X7R 0402 (RoHS) C615 3104082260070 Tantalum capacitor 22uF M 16V A (RoHS) C616 4010000000010 Fuse 6V 0.5A 1206 (RoHS) C617 3101062250000 Chip capacitor 2.2UF K 10V X5R 0603 (RoHS) C621 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS)
  • Page 37 Service Manual Parts List 1 Print Part No. Description Qty. 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS) C662 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS) C663 3101051030020 Chip capacitor 0.01UF K 25V X7R 0402 (RoHS) C664 3101054710010 Chip capacitor 470PF K 50V X7R 0402 (RoHS) C665...
  • Page 38 Parts List 1 Service Manual Print Part No. Description Qty. 3310990000160 ESD protection diode 10 5A/ 8/20uS -40~+85 (RoHS) D660 3310990000160 ESD protection diode 10 5A/ 8/20uS -40~+85 (RoHS) D661 5205000001530 Battery connector PA9T 4 10.8*9.6*8 (RoHS) 3001060000000 Chip resistor 0Ω J 1/10W 0603 (RoHS) L102 3221506601000 Ferrite bead 600Ω...
  • Page 39 Service Manual Parts List 1 Print Part No. Description Qty. 3504990000040 PA MOSFET 10uA 25V 10uA 7.2V 7W (RoHS) Q403 3403999000000 Transistor PNP*2 -50V/50V -100mA/100mA 80/80 (RoHS) Q404 3403008000010 Transistor Vce:50V VIoff:0.5V VIon:3V 100mA (RoHS) Q406 3408002000000 NPN transistor 12V 100mA 120 1GHz (RoHS) Q407 3403008000010 Transistor Vce:50V VIoff:0.5V VIon:3V 100mA (RoHS)
  • Page 40 Parts List 1 Service Manual Print Part No. Description Qty. 3001051030000 Chip resistor 10KΩ J 1/16W 0402 (RoHS) R311 3001054730000 Chip resistor 47KΩ J 1/16W 0402 (RoHS) R312 3001051020000 Chip resistor 1KΩ F 1/16W 0402 (RoHS) R313 3001051000020 Chip resistor 10Ω F 1/16W 0402 (RoHS) R315 3001054790000 Chip resistor 4.7Ω...
  • Page 41 Service Manual Parts List 1 Print Part No. Description Qty. 3001051040000 Chip resistor 100KΩ F 1/16W 0402 (RoHS) R603 3001051010000 Chip resistor 100Ω J 1/16W 0402 (RoHS) R604 3001056810000 Chip resistor 680Ω J 1/16W 0402 (RoHS) R605 3001051530000 Chip resistor 15KΩ J 1/16W 0402 (RoHS) R606 3001051020000 Chip resistor 1KΩ...
  • Page 42 Parts List 1 Service Manual Print Part No. Description Qty. 3608015000060 Power management IC LDO 5V 300mA (RoHS) U619 3608015000210 Power management IC LDO 12V 3.3V 300mA (RoHS) U621 3609042000020 MCU 2.8~5V 20MHZ -40~+85 LQFP 64 (RoHS) U622 3701327610060 Crystal 32.768KHz ±20ppm 12.5pF (RoHS) X601 3701002660130 TXCO 26MHz 3.135V~3.465V ±2.5ppm (RoHS)

  • Page 43: Tuning Description

    Service Manual Tuning Description 8. Tuning Description Required Test Instruments Radio communication test set (HP8921) 1 set 10V/3A regulated DC power supply 1 set Digital voltmeter 1 set Ammeter 1 set Preparations Make sure all test instruments work properly and connect the power supply. Tuning Description Wired Clone Instructions:...
  • Page 44 Tuning Description Service Manual User Clone Mode: Only clone relevant data in user mode (such as frequencies). Test parameters like test frequency, test item and base band parameter will not be cloned. Factory Clone Mode: Clone all the data excluding serial No. Description of Tuning Items Wide Band Narrow Band...
  • Page 45 Service Manual Tuning Description Baseband Design Baseband settings for UHF are given below:...
  • Page 46 Tuning Description Service Manual Baseband settings for VHF are given below: Description: Parameter Description To set the threshold value for enabling/disabling the squelch Squelch On/Off Threshold function. To tune the squelch threshold to compensate the circuit difference. It Calibrate Wide/Narrow is recommended to apply the same value to one model.
  • Page 47 Service Manual Tuning Description Parameter Description To configure the audio filter (0: not skip; 1: to skip one filter; 2: to skip Skip RX/TX High/Low Pass the other filter; 3: to skip two filters). Pre-emphasis To configure the pre-emphasis function. Skip CTCSS/CDCSS To set whether to skip CTCSS/CDCSS filter.
  • Page 48 Tuning Description Service Manual Note: By default, channel 1, 2, 3, 4 and 5 use wide band, while channel 6, 7, 8, 9 and 10 use narrow band. Remember to connect the antenna properly. Tuning in the mode ( Make sure the antenna or load is connected before adjustment. ) Tuning items for TX Measurement Tuning...
  • Page 49 Service Manual Tuning Description Measurement Tuning Tuning Specifications / Condition Test Test Compon Items Remarks Method Instrument Point save your Short press change and VHF: PTT to switch 4.8W±0.2W frequency another I≤1.5A under test. channel. Hold PTT+SK1 to power on the radio, and then go to channel 4.
  • Page 50 Tuning Description Service Manual Measurement Tuning Tuning Specifications / Condition Test Test Compon Items Remarks Method Instrument Point Following wide another band test, long channel. press PTT to perform narrow band test. Hold PTT+SK1 to power on the radio, and then go to channel 6.
  • Page 51 Service Manual Tuning Description Measurement Tuning Tuning Specifications / Condition Test Test Compon Items Remarks Method Instrument Point Hold PTT+SK1 to power on the Press radio, and then SK1/SK2 to go to channel 9. 4.3KHz - 4.5KHz Max. Communicat Anten tune Short press...
  • Page 52 Tuning Description Service Manual Adjust the power Hold supply to 6.9V Power 6.8~7.0V: and press SK1 PTT+SK1 Suppl the red LED power on the Power key to sample it. Voltage Digital voltmeter flashes and radio, and then Supply Then save your Threshold alert tone...
  • Page 53 Service Manual Tuning Description Wide Band Narrow Band Item Freq. Freq. Freq. Freq. Freq. Freq. Freq. Freq. Freq. Freq. CTCSS M Deviation CTCSS H Deviation TX Low Voltage Threshold GAIN1 GAIN2 Gain GAIN3 Gain4 Gain5 Max. Audio Deviation Rx Item Section SQL Tight On SQL Normal On SQL Tight Off...
  • Page 54 Tuning Description Service Manual Note: You can set squelch-related parameters in Baseband Design section. The data of source radio is for your reference only.

  • Page 55: Troubleshooting Flow Chart

    Service Manual Troubleshooting Flow Chart 9. Troubleshooting Flow Chart TX Circuit Start Low TX power No voice No TX TX LED fails Replace D609 Normal TX power Check TX power supply? supply Check voice path (MIC&D102) D604 glows red? TX VCO locked? Check TX VCO Replace D604 Check TX path...
  • Page 56 Troubleshooting Flow Chart Service Manual RX Circuit...
  • Page 57 Service Manual Troubleshooting Flow Chart MCU Section Start Normal power-up alert tone? Normal speaker? Replace it Check U601, Normal MCU U602, U604, VCC? and U606 Normal MCU Replace X601 X601? Check pin Other control pins connection or are normal? reburn the program MCU is OK...

  • Page 58: Disassembly And Assembly

    Disassembly and Assembly Service Manual 10. Disassembly and Assembly Disassembling and Assembling the Aluminum Chassis and 10.1 PCB Kit Follow the steps below to remove the aluminum chassis and PCB kit, and take these steps in a reverse way to attach them. Step 1 Remove the antenna (①), Channel Selector knob (②) and Radio On-Off/Volume Control knob (③).
  • Page 59 Service Manual Disassembly and Assembly 螺钉 喇叭 Screw Speaker 压片 Fixing Sheet Disassembling and Assembling TX/RX Unit 10.3 Follow the steps below to remove the TX/RX unit, and take these steps in a reverse way to attach them. Step 1 Powering off the radio Step 2 Removing the belt clip.
  • Page 60 Disassembly and Assembly Service Manual 天线端子焊锡位置 Soldering tin of antenna connector Instructions on Assembling 10.4 Assembling the Radio Case and Chassis 10.4.1 Step 1 Insert the speaker into the front case properly. Step 2 Insert the speaker fixing sheet into the front case, and fix it with a screw. Screw 钉...
  • Page 61 Service Manual Disassembly and Assembly 防水圈 Waterproof Ring Step 4 Solder the speaker cable to the main board with an electric iron. Step 5 Press the bottom of the chassis downwards to fit the chassis into the radio case. Note If the waterproof ring is not properly positioned, please use your finger to make it in place.

  • Page 62: Exploded View

    Exploded View Service Manual 11. Exploded View...

  • Page 63: Parts List 2

    Service Manual Parts List 2 12. Parts List 2 Part No. Description Qty. 6001139000000 Front case 6100312000010 Silicone rubber PTT key 6000842100010 PTT key 7101904020200 Self-tapping screw ST1.9*4.0mm Main PCB 6100542100000 Waterproof ring for terminal 6300115000000 Aluminum chassis 7102508000010 Machine screw M2.5*8.0mm 41005002004B0 PCB for PTT key 7300032000000...

  • Page 64: Packing Guide

    Packing Guide Service Manual 13. Packing Guide...

  • Page 65: Pcb View

    14. PCB View 14.1 PCB View Top Layer...
  • Page 66 PCB View Bottom Layer...
  • Page 67 14.2 VHF PCB View Top Layer...
  • Page 68 PCB View Bottom Layer...

  • Page 69: Level Diagram

    15. Level Diagram 24dBm 13dBm 2450m Vrms 7dBm 37.5dBm 90m Vrms Q407 AF AMP Q402 Q403 2SC3356 RD01 RD07 U302 120m Vrms 36dBm -123dBm DAC/ADC 37dBm ANT LPF -122dBm D401 D402 -121.5dBm U101 RDA1846 Q501 AT41511 -109dBm -113dBm BPF1...

  • Page 70: Block Diagram

    16. Block Diagram B201 SP_JACK PJ-D3027D MICJACK Q407 Q402 Q403 2SC3356 RD01 RD07 AF AMP U302 VOX_DET U613 D656 BATTERY G602 D602 BIAS DOWN EXT_PTT /EXT_MIC U401 D601 DAC/ADC U622 ANT LPF MC9S08AC60 D401 D402 E2ROM SDA/SCL U603 VRCR CSS/CODE/INT/SDO /RXON/TXON/SQ/PDN U101 RDA1846...

  • Page 71: Schematic Diagram

    17. Schematic Diagram 17.1 UHF1 TC-500S U 原理图(IF) IF Circuit L107 L107 R101 R101 C102 C102 L110 L110 L112 L112 601s 601s 1000p 1000p 601s 601s C123 C123 C120 C120 XT101 XT101 C103 C103 C104 C104 0.1u 0.1u 1000p 1000p 26MHz 26MHz VR101...
  • Page 72 MCU and POWER Circuit 原理图(MCU&POWER) TC-500S U SPK- SPK- SPK+ SPK+ TP109 TP109 TP108 TP108 AFOUT C321 C321 R310 R310 U302 U302 V_BAT R606 R606 1.2K 1.2K TDA2822D TDA2822D D657 D657 D303 D303 C326 C326 R316 R316 ADUC ADUC BEEP PESD12VS1UB PESD12VS1UB C332...
  • Page 73 TC-500S U原理图(PA&LNA) PA&LNA Circuit D402 D402 W401 W401 HVU131 HVU131 ANTENNA ANTENNA C404 C404 R440 R440 C409 C409 L420 L420 R414 R414 C414 C414 L408 L408 L417 L417 L419 L419 C425 C425 C427 C427 C429 C429 C431 C431 C433 C433 1.5k 1.5k 12nH...
  • Page 74 17.2 VHF IF Circuit TC-500S V 原理图(IF) L107 L107 R101 R101 L110 L110 L112 L112 C102 C102 601s 601s 601s 601s 1000p 1000p C123 C123 C120 C120 0.1u 0.1u 1000p 1000p C105 C105 C106 C106 C107 C107 C108 C108 R130 R130 R129 R129...
  • Page 75 MCU&PWER Circuit 原理图(MCU&POWER) TC-500S SPK- SPK- SPK+ SPK+ AFOUT C321 C321 R310 R310 U302 U302 TP109 TP109 TP108 TP108 V_BAT R606 R606 1.2K 1.2K TDA2822D TDA2822D D657 D657 D303 D303 C326 C326 R316 R316 BEEP ADUC10S03010 ADUC10S03010 PESD12VS1UB PESD12VS1UB 0.1u 0.1u V_BAT R605...
  • Page 76 PA&LNA Circuit TC-500S V原理图(PA&LNA) D402 D402 W401 W401 HVU131 HVU131 ANTENNA ANTENNA R440 R440 C409 C409 C414 C414 C450 C450 L421 L421 L423 L423 L422 L422 C425 C425 C404 C404 L420 L420 L408 L408 C427 C427 C431 C431 C433 C433 C429 C429 1.5k...

  • Page 77: Specifications

    Service Manual Specifications 18. Specifications General UHF1: 400~420MHz, 450~470MHz, 400~470MHz Frequency Range VHF: 136-174MHz Channel Capacity Channel Spacing 25 KHz /12.5KHz Operating Voltage 7.4V DC Battery 1300mAh Li-Ion battery Battery Life (5-5-90 Duty Cycle) Above 11 Hours Operating Temperature -20℃~+60℃ Dimensions (H×W×D) 113x 54x32mm (with...
  • Page 78 Specifications Service Manual VHF: 5W Spurious and Harmonics ≤-26dBm Modulation Limiting Wide: ≤5KHz; narrow: ≤2.5KHz FM Noise ≥45db/40dB Modulation Distortion ≤5% Adjacent Channel Power ≤-70dB/-60dB Note All Specifications are tested according to TIA/EIA-603, and subject to change without notice due to continuous development.
  • Page 79 8130050800200 L07157 2012-08-15...

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