HYT Science and Technology Co TC-620U2 Two-way Radio User Manual TC 610 620 Service Manual VO1

Shenzhen HYT Science &Technology; Co Ltd Two-way Radio TC 610 620 Service Manual VO1

Contents

Service Manual

1 CONTENTS General-------------------------------------------------------------------------------------2 Radio Overview-------------------------------------------------------------------------3 Software Specifications--------------------------------------------------------------7 Circuit Description---------------------------------------------------------------------8 Semiconductor Data----------------------------------------------------------------16 TC-610/620 Parts List 1-------------------------------------------------------------18 (U1) ……………………………………………………………….………….………… (U2)…………………………………………………………………………….………… Adjustment------------------------------------------------------------------------------46 Troubleshooting Flow Chart------------------------------------------------------56 Disassembly and Assembly-------------------------------------------------------55 Exploded View-------------------------------------------------------------------------64 TC-610/620 Parts List 2--------------------------------------------------------------66 Packing--------------------------------------------------------------------------------70 TC-610/620 PCB View----------------------------------------------------------------71 TC-610/620 Block Diagram---------------------------------------------------------74 TC-610/620 UHF ……………………………………………………………………………… TC-610/620 Level Diagram------------------------------------------------77 TC-610/620 Schematic Diagram--------------------------------------------------80 (U1) Schematic Diagram (AF & IF & PLL) ………………………………………………… (U1) Schematic Diagram (MCU & POWER)………………………………………….………… (U1) Schematic Diagram (VCO & RF)………………………………………….………… (U2) Schematic Diagram (AF & IF & PLL)…………………………………….……
2(U2) Schematic Diagram (MCU & POWER)………………………………………….………… (U2) Schematic Diagram (VCO & RF)………………………………………….…… Specifications-----------------------------------------------------------------------81
3General 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 and General Information The following general safety precautions as would normally apply, should be observed during all phases of operation, service and repair of this equipment. z This equipment should be serviced by qualified technicians only. z DO NOT operate the transmitter of radio unless all RF connectors are secure and any open connectors are properly terminated. z Do not modify the radio for any reason. z Use only HYT original batteries and chargers. z Use only the supplied or an approved antenna. z Do not use any portable radio that has a damaged antenna. If a damaged antenna comes into contact with your skin, a minor burn can result. z 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. Air bags inflate with great force. If a radio is placed in the air bag deployment area and the air bag inflates, the radio may be propelled with great force and cause serious injury to occupants of the vehicle. z Turn off your radio prior to entering any area with a potentially explosive atmosphere. z Do not charge your battery in a potentially explosive atmosphere. z To avoid possible interference with blasting operations, turn off your radio when you are near electrical blasting caps, in a blasting area, or in areas posted: “Turn off two-way radio.” Obey all signs and instructions. z Do not expose the radio to direct sunlight over a long time, nor place it close to heating source. z When using your radio, hold the radio in a vertical position with the microphone 3 to 4 centimeters away from your lips. z If you wear a radio on your body when transmitting, ensure that the radio and its antenna are at least 2.5cm away from your body.
4Radio Overview TC-610 ① PTT ② SK1 (programmable key) ③ SK2 (programmable key ④ Speaker ⑤ Microphone ⑥ Antenna ⑦ LED ⑧ Channel Selector Knob ⑨ On-Off/Volume Control Knob ⑩ Battery Latch ⑪ Earpiece Jack and Programming Port ⑫ Earpiece Cover⑬ Belt Clip ⑭ Battery ⑮ Belt Clip Screw ⑯ Charging Piece
5TC-620 124510678 91213141131615 ① PTT ② SK1 (programmable key) ③ SK2 (programmable key ④ Speaker ⑤ Microphone ⑥ Antenna ⑦ LED ⑧ Channel Selector Knob ⑨ On-Off/Volume Control Knob ⑩ Battery Latch ⑪ Earpiece Jack and Programming Port ⑫ Earpiece Cover⑬ Belt Clip ⑭ Battery ⑮ Belt Clip Screw ⑯ Charging PiecePTT Used to switch between transmitting and receiving modes. Hold down PTT and speak into the microphone to transmit, while release it to receive.
6SK1 Side key 1, programmable. Your dealer can program the key with a function via the programming software. SK2 Side key 2, programmable. Your dealer can program the key with a function via the programming software. LED LED statuses and alert tones: Power on the source radio while holding down the SK2 key. Power on the slave radio directly. LED flashes orange once. Source radio (After the slave radio is powered on and the cloning cable is connected, press SK2 on the source radio to start cloning) When cloning, LED flashes red. When completed, red LED goes out. When failed, red LED goes out. User Wired Clone Slave radio When cloning, LED flashes green. When completed, green LED goes out. Powering On in User Mode The power-on alert tone sounds when the radio is powered on. When the current channel is idle, “BEEP” tone sounds continuously. Low Battery Power Alert LED flashes red and a descending tone sounds every ten seconds.
7 Transmit LED glows red. When transmission times out, “BEEP” tone sounds continuously. TOT pre-alert: “BEEP” tone sounds once. Receive When a carrier is received, LED glows green. Scan When detecting, LED flashes green every second. Scan start tone (programmable by your dealer): “BEEP” tone sounds once. Scan stop tone (programmable by your dealer): “BEEP” tone sounds once. Priority channel scan tone (programmable by your deader): If the radio stays on a priority channel during receiving, “BEEP” tone sounds once. Programming Reading: LED flashes red. Writing: LED flashed green. Power Adjust When switching from high power to low power, a descending tone sounds. When switching from low power to high power, an ascending tone sounds. VOX When enabling the VOX function, an ascending tone sounds. When disabling the VOX function, a descending tone sounds. Channel Selector Knob Rotate the knob to select from channels 1 to 16. On-Off/Volume Control Knob Rotate the knob clockwise to turn the radio on, while rotate the knob fully counter-clockwise until a “click” is heard to turn the radio off.
8Turn the knob clockwise to increase the volume, or counter-clockwise to decrease the volume. Software Specifications Functions 1. Available Channels: 1 to 16 channels Frequency Range: UHF: 400-420MHz UHF: 450-470MHz 2. Channel Spacing: 25KHz/12.5KHz 3. Channel Step: 5/6.25/10/12.5KHz channel scan function 4. Tx/Rx Indication (red/green LED) 5. CTCSS/CDCSS (38 groups of CTCSS and 83 groups of CDCSS with degrees of 180/120 available for CTCSS squelch tail reverse method) 6. Low Battery Power Alert 7. Auto Battery Save 8. Unlock Detect and Alarm 9. 9 Selectable Squelch Levels 10. Monitor 11. TOT 12. Squelch Tail Elimination 13. PC Programming (including PC manual adjustment and PC automatic adjustment) 14. High/Low Power Switch (2.0/5.0W) 15. Wide/Narrow Band Compatible 16. Busy Channel Lockout 17. Wired Clone 18. Battery Power Indication 19. Manual Adjustment 20. VOX and 5 Selectable Sensitivity Levels
9Circuit Description Realization Methods for Basic Functional Modules PLL Frequency Synthesizer The PLL circuit generates local oscillator signals for reception and RF carrier signals for transmission. The PLL circuit consists of the VCO oscillator circuit and baseband processor chip and realizes frequency tracking and channel conversion under the control of MCU signals. 1. PLL MB95F108AK WPFV-GE1U6051/217bitDIV32/33OSC1/221bitDIVU202CPRX-VCOL102D103L101APC/TUNET/R-SWCLKDATAENQ1012SK508NVD102BUFFERQ6123D104D101D100Q1002SK508NV12.8MHZTX-VCOLPFQ5123 Figure 2 The step frequency of the PLL circuit is 5.0KHz, 6.25KHz, 10.0KHz or 12.5KHz. Therefore, the reference oscillator signal (38.4MHz) is divided into 5.0KHz, 6.25KHz, 10.0KHz or 12.5KHz reference signals by a fixed counter in PLL of U202. Signals output by VCO pass through buffer Q102 followed by amplifier Q103 and enters PLL of U200 for frequency division by a variable divider. The signals from the frequency division are compared with reference signals in the phase comparator PD of PLL. Signals output by the phase comparator is added to the varactors D100, D101, D102 and D103 of VCO to control the output frequency after passing through a low pass filter. 2. VCO The VCO section is realized by the oscillator circuit of three-point capacitor. In transmitting mode, the operation frequency of VCO is generated by Q100; in receiving mode, the operation frequency of VCO is generated by Q101.
10U202 generates a control voltage via the phase comparator to control varactors (D100 and D101 in transmitting mode; D102 and D103 in receiving mode) to bring the oscillator frequency of VCO in line with the preset frequency of MCU within a broader frequency range. The switching tube Q652 switches between transmitting and receiving under the control of T/R. In transmitting mode, T/R is set as low level and Q100 operates when Q653 becomes conductive. In receiving mode, T/R is set as high level and Q101 operates when Q653 cuts off. Output from Q100 and Q101 is sent to the buffer amplifier for process after passing through amplifier Q102. If PLL is unlocked, LD pin of U202 outputs low level. When this situation is detected by a microprocessor, transmitting and receiving operations are suspended and an alert tone sounds. RF Power Amplifying Circuit (Tx Section) Block Diagram for RF Power Amplifying Circuit R/TSWL4531uRXRQA00022133 AmplifierQ4012SC4988123APCLPF2SK3475213Q4002SC5108123Q1042SC5108123MATCHANTENNAQ4020RF PAQ403 Figure 3 To obtain the required RF power, RF signals from VCO is amplified by driving amplifiers Q400 and Q401 after passing through buffer Q104. The amplified RF signals enters driver Q402, which performs power pre-amplification on the input signals to derive a certain power to drive the final power amplifier. The final power amplifier Q403 performs power amplification again on the input RF signals to derive the required power. Then the amplified RF signals pass through Tx-Rx switching diode D401 followed by the LC low pass filter circuit (LPF). The signals are transmitted through the antenna after ultraharmonics are filtered by the LPF. Rx Amplification (LNA) and RF Bandpass Network (BPF) To obtain better frequency selectivity, the Rx bandpass utilizes multiple electrically tunable circuits. The block diagram is shown below:
11C505LNATUNE BPFTUNE FROM MCUC504C523L508 L506Q500D503L507D506123L501C526C519C524L502C521C506TUNE FROM MCUD504D505D507TUNE BPF Figure 4 The Rx signals input from the antenna is filtered to remove out-of-band signals at the electrically tunable bandpass network (D503, D504, L501, L502, C503, C505 and 507) and then amplified by low-noise amplifier (LNA) Q500 to obtain a certain level required by reception. The signals pass through the three-level bandpass network (mainly consisting of D505, D506, D507 and periphery components) to effectively restrain the out-of-band interference and to derive pure Rx RF signals, which will be fed to the mixing stage. The electrically tunable control signals are provide by MCU. The required level can be obtained through table looking up or formula computing to accurately control varactors to operate within proper voltage range. It constitutes a bandpass filter with the periphery inductive capacitors to track the Rx frequency under the change of MCU control voltage and to obtain the preset Rx sensitivity requirements and out-of-band interference requirements. Mixing Circuit (MIXER) and IF Bandpass Network (BPF) Block Diagram for the Mixing Circuit L53022nHC533C534 C532C531XF1Q50138.85MHZ1stIF BPFRF MIXERAN29160C528 Figure 5 The mixer mainly processes the local oscillator signals and Rx RF signals output by VCO. The first IF from the mixer is used by the demodulator chip to discriminate frequency. Here the active mixer
12is utilized. The mixer tube (Q501) utilizes dual gate FET MOS (3SK318) and has better noise characteristics and square law characteristics. The isolation between the local oscillator signals and the Rx signals is high. To ensure proper sensitivity and certain gain for the mixer tube, tune delicately via the offset. The signals output from the mixer pass through inductor L509 to remove residual spurious and then enter the first IF filter. The filter utilizes the first-class crystal filter to ensure sufficient bandwidth and excellent selectivity. The signals finally enter baseband processing chip AN29160 for demodulation. APC/TUNE Automatic Power Control Circuit Block Diagram for the Circuit: R430R421 Q431DTA114YER437C441R422R441R433R434from MCUV_BATTX_VCCR432R440C435C437R438C436R442C438-++-U430NJM290413425786R436Q430DTC114EE231R431R420R439R500C440C439to RF PA(APC)C434R435to BPF(TUNE) Figure 6 Subject 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 APC/TUNE control signal level. One part of them is used as the control voltage of the electrically tunable circuit after passing through R500. In transmitting mode, the levels are voltage-divided by R439 and R440 to obtain the APC reference voltage. The transmitting current passes through R420, R421 and R422 to derive the error detect voltage. The voltage is amplified by operational amplifier IC U430 and then compared with APC reference voltage to output APC control voltage and to form closed-loop negative feedback power control when the transmitting current changes.
13Audio and Signalling Processing Circuit Baseband processing IC AN29160 has high integration level and powerful functions. Many of the processing functions (as VCO level detect&output, SQ signal level detect&output, Tx-Rx audio processing switch, audio amplifier, etc) and can be realized inside. The Tx-Rx sharing can also be realized. Block Diagram for Tx Audio&Signalling Process D104Q1002SK508NVTX-VCOcpuPreEmphasisSFAMP(TX)sp AmpToneAFMODMic ampU200AN29160AAPROCESSER信令输入AFHPF5th-HPFmicMICAFmutevolumemic muteLIM(TX)0 Figure 7 Tx Audio Process: Audio signals input from the MIC is converted to electrical signals through the audioelectric conversion of MIC and the amplitude limit of them are amplified by U200 after the signals are pre-emphasized. The processed signals go to the low-pass filter circuit to remove frequencies above 3KHz and then go to VCO for direct frequency modulation after passing through potentiometer VR200. Tx Sinalling Process: MCU outputs, via the QTO port, signalling encoder waveform, which is divided into two parts for modulation after passing through the RC network. One part is used to modulate PLL reference-frequency oscillator directly, while the other part is used to modulate VCO. VR260 balances the modulation and adjust the signal amplitude ratio of one part to the other, which optimizes the singalling waveform modulated on the carrier.
14Block Diagram for Rx Audio&Signalling Process RXsp Amp2ndIF BPFSFAMP(TX)VOXTonetone-LPFDETBGRENRSSIMic ampVCODATA05th-LPFIFAMP2AFHPFPE信令输出5th-HPFIFAmp1SWTo MCUICCF300450KHz+/4.5KOUT INVREFTXDeEmphasisLATCHAFmuteSPVCCvolumeTo MCUCDC/CTCMCUmix2mic mutePOWERREGVCCLIM(TX)SQAUDIO OUT16Ω IWU201AFAMPU200AN29160AAPROCESSER Figure 8 U200 outputs initial audio signals (including noise, signaling, audio, etc) after performing frequency-discrimination and demodulation on the received signals. Therefore, the audio process is divided into three parts: Rx Audio Process: One part of the audio signal output by U200 is fed to the RC low-pass filter and de-emphasis circuit and then amplified by U200. The audio signal is recovered after frequencies below 300Hz are removed. The recovered audio signal is adjusted by the potentiometer and then goes to audio power amplifier IC (U201), which amplifies power for the input audio signals to drive the speaker directly. To obtain higher power, the BTL bridge dual output is utilized. Rx Signalling Process: One part of the audio signal output by U200 is fed to the 300Hz low-pass filter circuit (U640). After audio signals above 300Hz are removed, CTCSS/CDCSS goes to the QTIN pin of CPU. CPU decodes the input signallings. Noise Signalling Process: One part of the audio signal output by U200 goes to U200 again. After the signal is filtered, amplified and rectified inside U200, a DC voltage signal (SQ) corresponding to the noise component is derived. The DC signal is fed to the BUSY pin of MCU via the ND pin of U200. Then MCU processes the input signals.
15MCU Control Section The block diagram for the MCU control section is shown below. MCU works under the 7.3728MHz clock frequency. Channel SWMB95F108AK WPFV-GE1U605PTTMONBATU609APC/TUNEPLL1.vox2.BUSY_DET8.UART7.W/N6.DC/CTC5.SAVE4.T/R3.BEEP/CALLX6019.BAT_DETU610ResetIC10.PLL_LD7.3728M晶体 Figure 9 The MCU control section is composed of MCU, EEPROM, RESET IC, keys, Channel Selector knob, etc. Main functions realized by this circuit section are: 1. Control Signal: Control of battery save mode Control of high/low power switch Control of band/narrow band switch Control of Tx-Rx switch Control of APC/TUNE output voltage Control of Tx power supply and power supply of audio power amplifier Control of squelch ON detect 2. Signal Detect
16Detect of external PTT, MONI and VOX Detect of PLL unlock (UL) Detect of VOX ON level Detect of battery power alarm Detect of enabling and checking external remote speaker microphone 3. Data Transfer and Process EEPROM data initiation Programming data transfer Encoding process of channel selector knob Signalling encoding and decoding Data transfer of baseband processing chip (PLL) Power Supply Process Block Diagram for the Circuit SWQ611power managementVinVSSVout---7.2VU606L604601sSAVEFMMT717FMMT717Q6125VUPA572TQ610TXCV-TX POWER-SAVE Figure 10 After the radio is powered on, the battery voltage is provided to the RF power amplifier and audio power amplifier to meet the requirements of sufficient power amplification after filtered by L604 and C682. Another path is input with the regulator IC (U606) of 5V and outputs voltage of VCC_5V for use by MCU and the baseband processing chip after regulated. Because the radio works under the half duplex mode, it is required to control the Tx and Rx power supply alternately. To meet the requirement of the battery save mode, MCU should output a pulse signal with fixed duty factor
17(control signal of SAVE). When the SAVE signal of MCU is of high level, Q610 becomes conductive and provides a 5V voltage (V_SAVE) for the operating circuit. PLL and the receiving circuit operate. When the SAVE signal is a pulse signal, the radio enter the battery save mode. When transmitting, TXC, control signal of CPU, is of high level. Q611 becomes conductive and provide a 5V voltage for the transmitting circuit and the transmitting circuit operates. Power supplies of the Tx section and Rx section both have symmetrical regulation measures. When the load change changes the output voltage/current, the regulator closed-loop feedback circuit operates, regulating the output voltage at 5V. VOX Realization The block diagram is shown below: Q2022SA183212 3Q2012SK1824231J4MICJACK2431VCC_5VR2511MMIC_ENEXPTTC260220PRXDmicX1-2+1R2012.2KC201470PC2004.7u/10VR2034.7KVCC_5VR200470C2131UC2120.1UR20547KC2020.1UL200 1UHR202 100TP200R208100KR20756KR206 1KR204 470C2740.01U Figure 11 After the function key VOX is held down, the radio enters the VOX status. The VOX function can only be enabled when MCU detect that MIC enabling signal (MIC_EN) and external VOX enabling signal (EXT-PTT) switch from low level to high level almost at the same time (within hundreds of milliseconds). Otherwise, it is detected as the earpiece without VOX and the VOX function is off.
18When the remote speaker microphone with VOX is inserted into the earpiece jack, Q201 cuts off. MIC_EN switches from low level to high level and Q202 completes the circuit with R204 and the external remote speaker microphone simultaneously. Q202 becomes conductive. EXT-PTT switches from low level to high level, which is detected by MCU as insert of a remote speaker microphone with VOX. The VOX function is enabled. When the VOX detect level (5 levels available) meets the preset requirements, the radio transmits and the audio signal goes to the baseband processing IC AN29160 through the processing path. If a remote speaker microphone without VOX (remote speaker microphone with PTT) is inserted, Q201 cuts off. MIC_EN switches from low level to high level but Q202 can not complete the circuit and keep the cut-off status. EXT-PTT is of low level. MCU detects as the remote speaker microphone without VOX and the radio returns to the common mode. Press the PTT key on the remote speaker microphone to transmit. Semiconductor Data Pin No. Pin Name TC-610 TC-620 I/ODescription 1 AVcc Vcc Vcc Power supply pin for A/D, connecting power supply 2 AVR Vcc Vcc A/D reference input pin, connecting power supply 3 PE3/INT13 PTT PTT I PTT key (connected with pull-up resistor ) (valid at low level) 4 PE2/INT12 A_KEY A_KEY I SK1, programmable function key (connected with pull-up resistor ) (valid at low level) 5 PE1/INT11 EXT-PTT EXT-PTT I PTT key on the earpiece (connected with pull-down resistor) (valid at high level) 6 PE0/INT10 B_KEY B_KEY I SK2, programmable function key (connected with pull-up resistor ) (valid at low level) 7 P83 ENC3 ENC3 I 8 P82 ENC2 ENC2 I 9 P81 ENC1 ENC1 I 10 P80 ENC0 ENC0 I Encoder input of channel selector knob(connected with pull-up resistor ) 11 P71/TI0 T/R T/R O Tx-Rx switch control H(R)/L(T) 12 P70/TO0 Reserve Reserve O Reserved 13 MOD For down -loading For down -loading I An operating mode designation pin. When downloading, this pin is connected with Vcc and a resistor of 47K is also connected between the
19pin and the grounded Vss. When not downloading, only a resistor of 47K is connected between the pin and the grounded Vss. 14 X0 OSC0 OSC0 15 X1 OSC1 OSC1 Connecting pin of 7.3728MHzMHz master crystal oscillator 16 Vss GND GND Power supply (GND) pin (When recording, it is connected with the GND recording port signals.) 17 Vcc VCC VCC MCU 5V power supply (When recording, it is connected with the VCC recording port signals) 18 PG0 C C This port can not be used as IO and a capacitor is connected between the port and the grounded Vss. 19 PG2/X1A OSC32K OSC32K 20 PG1/X0A OSC32K OSC32K Subsystem clock pin (Reserved） 21 /RST RESET RESET I Reset (When recording, it is connected with the RSTX recording port signals.) 22 P00/INT00 Reserve Reserve O23 P01/INT01 Reserve Reserve O24 P02/INT02 Reserve Reserve O25 P03/INT03 Reserve Reserve OReserved 26 P04/INT04 PLLEN2 PLLEN2 I/OPLL ENABLE 27 P05/INT05 PLLDATA2 PLLDATA2 I/OPLL DATA 28 P06/INT06 PLLCLK2 PLLCLK2 I/OPLL CLOCK 29 P07/INT07 UL2 UL2 I/OTB31202 PLL circuit unlock detect (H: Lock L Unlock) (connected with pull-up resistor ) 30 P10/UI0 RXD RXD I UART RX (When recording, it is connected with the UI recording port signals) 31 P11/UO0 TXD TXD O UART TX (When recording, it is connected with the UO recording port signals) 32 P12/UCK0 Reserve Reserve O Reserved 33 P13/TRG0/ADTG Reserve Reserve I Reserved 34 P14/PPG0 MIC_EN MIC_EN I Check whether the MIC is connected(connected with pull-down resistor) (valid at high level) 35 P20/PPG00 CTC_DCS CTC_DCSPWMCTCSS/CDCSS output 36 P21/PPG01 Reserve Reserve O Reserved 37 P22/TO00 TONE TONE O BEEP tone output/CALL tone output 38 P23/TO01 W/N W/N O Wide/Narrow band control W(L)/N(H) 39 P24/EC0 Reserve Reserve O Reserved
2040 P50/SCL0 SCL SCL SCLEEPROM CLOCK 41 P51/SDA0 SDA SDA SDAEEPROM DATA 42 P52/PPG1 AP/TU AP/TU PWMAuto power control/adjust 43 P53/TRG1 TX_CTRL TX_CTRL O Tx power supply control “H”: valid Transmission is on. 44 P60/PPG10 PLLCLK PLLCLK O PLL CLK 45 P61/PPG11 PLLDATA PLLDATA O PLL DATA 46 P62/TO10 PLLEN PLLEN O PLL ENABLE 47 P63/TO11 Reserve Reserve O Reserved 48 P64/EC1 Reserve Reserve O Reserved 49 P65/SCK Reserve Reserve O Reserved 50 P66/SOT Reserve Reserve O Reserved 51 P67/SIN Self Self I For test (used to enter the factory clone mode, connected with pull-up resistor) 52 P43/AN11 SPCNT SPCNT O Power supply control of main audio "H": audio ON53 P42/AN10 PCONT PCONT O Power supply control pin of AN29160AA 54 P41/AN09 RLED RLED O Red LED 55 P40/AN08 GLED GLED O Green LED 56 P37/AN07 Reserve Reserve O Reserved 57 P36/AN06 Reserve Reserve O Reserved 58 P35/AN05 TI TI I/ADCTCSS/CDCSS input 59 P34/AN04 BUSY BUSY I/ADChannel busy check (requiring 10-digit AD) 60 P33/AN03 BAT_DET BAT_DET I/ADBattery voltage detect (requiring 10-digit AD) 61 P32/AN02 Reserve Reserve O Reserved 62 P31/AN01 Reserve VOX I/ADVOX detect (requiring 10-digit AD) 63 P30/AN00 Reserve Reserve O Reserved 64 AVss GND GND Power supply (GND) pin for A/D, ground
21Adjustment User Mode Power on the radio to enter the conventional mode when no key is pressed. Programming Mode In user mode, the PC programming software triggers the PC programming mode by communication through a special communication protocol. The programming mode can set functions and adjustment parameters of the radio via the PC programming software (including user version and factory version). Wired Clone Mode Description The wired clone mode is a separate mode. To enter other modes, the radio must be turned off and back on. The wired clone mode is classified into user wired clone mode and factory wired clone mode. User Wired Clone Mode Connect the two radios with the cloning cable. Power on the mother radio while holding down SK2 on it. The radio enters the wired clone mode in two seconds. Power on the slave radio directly and the radio enters the user mode. The user wired clone mode clones the parameter data in EEPROM of the mother radio into that of the slave radio. The transferred data only includes channel data and shared setting parameters, excluding adjustment parameters, model version information, serial number, etc. Factory Wired Clone Mode Short connect the SELF pin of the mother radio’s MCU and connect the two radios with the cloning cable. Power on the mother radio while holding down SK2 on it. The radio enters the wired clone mode in two seconds. Power on the slave radio directly and the radio enters the user mode. The transferred data includes all data (excluding the serial number) in EEPROM and the switch icon of the manual adjustment inhibit. Process Wired Clone 1. LED flashes orange once when the mother radio enters the wired clone mode. Press SK2 to
22clone data into the slave radio. 2. During communication, LED of the mother radio flashes red, while LED of the slave radio flashes green. When the communication is completed, red LED of the mother radio and green LED of the slave radio go out, preparing for the next cloning. 3. During communication, if an exception occurs, the communication will be terminated. Red LED of the mother radio goes out, preparing for the next cloning. 4. When the communication is completed, the mother radio returns to the preparing status. Press SK2 to clone again. Manual Adjustment Mode Power on the radio while holding down PTT and SK2 simultaneously. The radio enters the manual adjustment mode Note: The operation is controlled by the switch of Manual Adjustment Inhibit in the programming software. When the adjustment function is disabled, the radio can not enter the mode. This can prevent users’ accidental entry and parameter changing, which will affect radio performances During production, turn off the adjustment switch to avoid users’ accidental entry and from changing adjustment values after the values are adjusted. The adjustment values can only be reset in the production setting mode and are adjusted again according to the requirements. However, they can not be changed in any other mode. Adjustment Description Enter Manual Adjustment Mode Hold down PTT and SK2 simultaneously for two seconds at least to power on the radio. Orange LED (red LED + green LED) lights, indicating the entry into the adjustment mode. Release the keys to enter the N item (N is dependant on the location of the channel selector knob) of the Tx adjustment items in the adjustment mode. The radio stays at the Tx adjustment items by default and LED glows red. Note: The CH15 adjustment item is invalid, while CH16 is used to toggle between Tx adjustment items and Rx adjustment items. If the channel selector knob locates at CH15 or CH16, LED glows neither red nor green. Switch between Tx Adjustment Items and Rx Adjustment Items Rotate the channel selector knob to CH16. Hold down PTT for 1.5s at least to toggle between Tx
23adjustment items and Rx adjustment items. If LED lights red upon key pressing, the radio switches to Tx adjustment items. If LED lights green upon key pressing, the radio switches to Rx adjustment items. LED glows red for Tx adjustment items. LED glows green for Rx adjustment items. Switch among Tx/Rx Adjustment Items Switch via the channel selector knob. Tx: CH1-CH14 indicate Tx preset power, Tx low power, Tx medium power, Tx high power, CDCSS deviation, 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: Tx medium power of TC-610/620 is not required to be adjusted. Please skip this item. LED glows red for the adjustment items CH1-CH14. CH15 is invalid and red LED goes out. Rx: CH1-CH8 indicate SQL ON 1, SQL ON 5, SQL ON 9, SQL OFF 1, SQL OFF 5, SQL OFF 9, Rx low voltage threshold and Rx bandpass filter respectively. LED glows green for the adjustment items CH1-CH8. CH9-CH15 are invalid and green LED goes out. Wide/Narrow Band Switch in an Adjustment Item In an adjustment item, hold down the PTT key for 1.5s at least. LED flashes orange, indicating the long key pressing is valid. Release the key and the radio switches between wide band and narrow band periodically. After the wide/narrow band switch, the adjustment point is regarded as the first frequency of the current band by default. Frequency Switch in a Band of an Adjustment Item In a band of an adjustment item, short press the PTT key for less than 1.5s. LED flashes green, indicating the short key pressing is valid. The radio switches frequencies one after another. Plus-Minus of the Adjustment Value in a Band of an Adjustment Item In a band of an adjustment item, short press SK1, and the adjustment value increases in step of 1. Hold down SK1, and the adjustment value increases continuously in step of 1. When the adjustment value gets to the maximum value allowed by the adjustment item, the adjustment value will keep the maximum value constant. In a band of an adjustment item, short press SK2, and the adjustment value decreases in step of 1.
24Hold down SK1, and the adjustment value decreases continuously in step of 1. When the adjustment value gets to the minimum value allowed by the adjustment item, the adjustment value will keep the minimum value constant. Process on Several Exceptional 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. After the above adjustment items are entered, press SK1 or SK2 to start the AD sampling (including calculation process) once. Rotate the channel selector knob to save the current AD sampling value. If SK1 or SK2 is not pressed, the AD sampling is not started and the previous adjustment values can not be updated. Rx: CH1-CH8 indicate SQL ON 1, SQL ON 5, SQL ON 9, SQL OFF 1, SQL OFF 5, SQL OFF 9 and Rx low voltage threshold respectively, which are related with the AD sampling. After the above adjustment items are entered, press SK1 or SK2 to start the AD sampling (including calculation process) once. Rotate the channel selector knob to save the current AD sampling value. If SK1 or SK2 is not pressed, the AD sampling is not started and the previous adjustment values can not be updated. Key Description Short Press: key pressing time is less than 1.5s. Long Press: key pressing time is 1.5s at least. Description of Adjustment Items
25Freq. 1 Freq. 2 Freq. 3 Freq. 4 Freq.5 Freq. 1 Freq. 2 Freq. 3 Freq. 4 Freq. 51Adjust preset RF power Y2Tx low power YYYYY3Reserved channel (not adjust)4Tx high power YYYYY5CDCSS deviation YYYYYYYYYY6CTCSS (67Hz) deviationYYYYYYYYYY7CTCSS (151.8Hz) deviationYYYYYYYYYY8CTCSS (254.1Hz) deviationYYYYYYYYYY9VOX gain1 Y10 VOX gain2 Y11 VOX gain3 Y12 VOX gain4 Y13 VOX gain5 Y14 Tx low voltage threshold Y1Carrier SQL level 1 ON YYYYYYYYYY2Carrier SQL level 5 ON YYYYYYYYYY3Carrier SQL level 9 ON YYYYYYYYYY4Carrier SQL level 1 OFFYYYYYYYYYY5Carrier SQL level 5 OFFYYYYYYYYYY6Carrier SQL level 9 OFFYYYYYYYYYY7Tx low voltage threshold Y8Bandpass filter YYYYYNote: Y indicates the valid adjustment frequency. The residual channels are idle and has no adjustmentitems.Tx SectionRx SectionTC-610/620 Adjustment ItemsChannel Adjustable Freq. Wide NarrowSwitch between Tx Adjustment Items and Rx Adjustment Items Rotate the channel selector knob to CH16. Long press the PTT key for 1.5s at least to toggle between Tx adjustment items and Rx adjustment items. If LED lights red upon key pressing, the radio switches to Tx adjustment items. If LED lights green upon key pressing, the radio switches to Rx adjustment items. LED glows red for Tx adjustment items. LED glows green for Rx adjustment items. Wide/Narrow Band Switch and Frequency Switch in an Adjustment Item In an adjustment item, long press the PTT key for 1.5s at least to switch between wide band and narrow band periodically. The adjustment point is regarded as the first frequency of the current band by default. Short press the PTT key for less than 1.5s to switch frequencies periodically. Adjustment Items Tx
26Tx frequency tolerance, VCO lock voltage adjustment, maximum deviation and modulation sensitivity Note: These items are adjusted outside the adjustment mode (unnecessary to enter the adjustment mode) via the hardware adjustment. Tx low power, Tx high power, CDCSS waveform, CDCSS deviation, CTCSS deviation (low), CTCSS deviation (high) and Tx low voltage threshold Note: These items are adjusted inside the adjustment mode via the software adjustment. Rx VCO lock voltage adjustment (outside the mode), squelch, Rx bandpass filter, Rx low voltage threshold Specific Operations and Requirements Conventional Adjustment Items (outside the adjustment mode): Tx frequency tolerance, VCO voltage adjustment, maximum deviation, modulation sensitivity. Note: The configuration file has preset CH1, CH2 and CH3 as wide band with low, medium and high frequency respectively and CH4, CH5 and CH6 as narrow band with low, medium and high frequency respectively. Make sure the antenna or load is connected before adjusting. Measurement Adjustment Adjustment Item Condition Test Equipment Test Point Part Method Specifications/Remarks Tx frequency tolerance Rotate to CH2. Press PTT to transmit. Radio communication test set Antenna VR300Adjust VR300 with a ceramic alignment screwdriver to limit the center frequency to the error range. ≤150Hz Rotate to CH1. Press PTT to transmit. Adjust TC100 with a ceramic alignment screwdriver until the lock voltage is within the required range. 0.7V （+0.1V）Tx VCO lock voltage Rotate to CH3. Press PTT to transmit. TC100Check ≥2.3V Rx VCO lock voltage Rotate to CH1. Digital voltmeter CV TC101 Adjust TC101 with a ceramic alignment screwdriver until the 0.7V （+0.1V）
27lock voltage is within the required range. Rotate to CH3. Check ≥2.3V Wide Rotate to CH1, CH2 and CH3 respectively. Press PTT to transmit. Adjust VR200 with a ceramic alignment screwdriver to limit the deviation to the specified range. 3.7-4.3KHz Max. Deviation Narrow Rotate to CH4, CH5 and CH6 respectively. Press PTT to transmit. Radio communication test set LPF: 15kHz AF:1kHz 150mV VR200Check 1.7-2.2KHz Wide Rotate to CH1, CH2 and CH3 respectively. Press PTT to transmit. Adjust the audio output signal of the radio communication test set to get the deviation to 3.0KHz. 10-20mV Modulation Sensitivity Narrow Rotate to CH4, CH5 and CH6 respectively. Press PTT to transmit. Radio communication test set BPF: 0.3-3KHz AF: 1KHz Antenna Earpiece jack Adjust the audio output signal of the radio communication test set to get the deviation to 1.5KHz. 10-20mV Adjustments in the adjustment mode Note: The antenna or load must be connected before adjusting. Measurement Adjustment Adjustment Item Condition Test Equipment Test Point Parts Method Specifications/Remarks Rotate to CH4. Press PTT to enable the function. Low frequency Tx Power High Short press PTT to switch frequencies periodically (refer to the adjustment list) Radio communication test set Ammeter Antenna port SK1 SK2 Press SK1/SK2 to increase/decrease the output power and rotate the channel selector knob to save. 4.5-5W I≤1.7A
28Rotate to CH2. Press PTT to enable the function. Low frequency Low Short press PTT to switch frequencies periodically (refer to the adjustment list) Press SK1/SK2 to increase/decrease the output power and rotate the channel selector knob to save. 2W±0.3W I≤1.2A Rotate to CH5. Press PTT to enable the function. Low frequency Adjust VR260 with a ceramic alignment screwdriver to enable the waveform approximate to the rectangular wave. CDCSS Waveform Short press PTT to switch frequencies periodically and long press PTT to switch between wide band and narrow band. VR260 Check Rotate to CH5. Press PTT to enable the function. Wide band Low frequency Wide Press PTT to switch other frequencies (medium-low, medium, medium-high and high) Adjust VR601 with a ceramic alignment screwdriver check each frequency. Adjust finely with SK1 and SK2 to limit the CDCSS deviation to the required range if necessary. 500-800Hz CDCSS Deviation Narrow Long press PTT (≥1.5s) to enter narrow band. Radio communication test set LPF:0.3KHz AntennaVR601 SK1 SK2 Check 300-500Hz
29Low frequency Press PTT to switch other frequencies (medium-low, medium, medium-high and high) Wide Rotate to CH6, CH7 and CH8 respectively and CTCSS is set to low, medium and high. Press PTT to enable this function. Wide band Short press PTT to switch frequencies on each channel. Adjust VR601 with a ceramic alignment screwdriver and check each frequency. Adjust finely with SK1 and SK2 to limit the CTCSS deviation to the required range if necessary. 500-800Hz CTCSS Deviation Narrow Long press PTT (≥1.5s) to enter narrow band on CH6, CH7 and CH8 and short press PTT to switch frequencies. Radio communication test set LPF:0.3KHz Antenna VR601SK1 SK2 Check 300-500Hz Low Tx Voltage Threshold Digital voltmeter Power supply port Power supply Adjust the output voltage of the power supply and check the alarm level 6.2V-7.0V(≤7.0V: LED flashes; ≤6.2V: the alarm tone sounds and transmission suspended) Low voltage Power-Off Level Digital voltmeter Power supply port Power supply Adjust the output voltage of the power supply and check the power-off level <5.80V
30Item Condition Test Equipment Parts Method Specification/ Remarks Rotate to CH8.Low frequency Rx Sensitivity (bandpass) Short press PTT to switch other frequencies. Radio communication test set SSG:-119dB MOD:1KHz DEV:3.0KHz Filter: 0.3-3KHz Antenna Remote speaker MIC jack SK1 SK2 Check whether SINAD is within the range and whether to get SINAD≥12dB by adjusting SK1 or SK2. Rotate the channel selector knob to save after the five-point adjustment is completed. Adjust the volume control knob to the right place, which will not limit the output. SINAD≥12dB Wide Rotate to CH2 and SQL is set to level 5 ON. Press SK1 or SK2 to enable the function. The channel spacing is wide band. Low frequencyShort press PTT to switch frequencies. Adjust the output signals of SSG to the squelch level. Rotate the channel selector knob to save after the five-point adjustment is completed. SQL level: -119±1dB SQL ON Narrow Long press PTT (≥1.5s) to enter narrow band. Press SK1 or SK2 to enable this function. Short press PTT to switch frequencies. Radio communication test set SSG:-119dB MOD:1KHz DEV:1.5KHz Filter: 0.3-3KHz Antenna Remote speaker MIC jack SK1 SK2 Adjust the output signals of SSG to the squelch level. Rotate the channel selector knob to save after the five-point adjustment is completed. SQL level: -118±1dB
31 Wide Rotate to CH5 and SQL is set to level 5 OFF. Press SK1 or SK2 to enable the function. The channel spacing is wide band. Low frequencyShort press PTT to switch frequencies. Radio communication test set SSG:-121dBm Antenna Remote speaker MIC jack SK1 SK2 Adjust the output signals of SSG to the squelch level. Rotate the channel selector knob to save after the five-point adjustment is completed. SQL level: -121±1dB SQL OFF Narrow Long press PTT (≥1.5s) to enter narrow band. Press SK1 or SK2 to enable this function. Short press PTT to switch frequencies. Radio communication test set SSG:-120dBm Antenna Remote speaker MIC jack SK1 SK2 Adjust the output signals of SSG to the squelch level. Rotate the channel selector knob to save after the five-point adjustment is completed. SQL level: -120±1dB Rx Low Voltage Threshold Adjust the output voltage of the power supply and check the alarm level (LED flashes red and the alarm tone sounds) ≤6.50V Low Voltage Power-Off Level Digital voltmeter Power supply port Power supply Adjust the output voltage of the power supply and check the power-off level. <5.80V
32Appendix: Reference Voltage Setting of Battery Capacity Check in transmitting mode Green LED (70%-100%) >7.35V 18min Orange LED (50%-70%) 7.15V - 7.35V 12min Red LED (30%-50%) 7.00V - 7.15V 12min LED flashes red 6.20V - 7.00V 18min LED flashes red +an alarm tone sounds every 10 5.80V - 6.20V Halt <5.80V Check in transmitting and standby mode (or press the battery capacity check key. Green LED (70%-100%) >7.55V 18min Orange LED (50%-70%) 7.35V-7.55V 12min Red LED (30%-50%) 7.00V-7.35V 20min LED flashes red (<30%) 6.50V-7.00V 18min LED flashes red +an alarm tone sounds every 10 seconds. 5.80V-6.50V Halts <5.80V
33Troubleshooting Flow Chart Tx Section No transmissionStartNormal Tx power supply?D602 glows red?Check Tx power supplyTx VCO is locked?Check Tx VCOCheck Tx channelReplace D602No voice during transmissionTx LED not lightCheck antenna connection Check Q400, Q401, Q402 and Q403YesNoCheck APC control circuitLow Tx powerCheck voice channel (MIC, VR200 and D104)Replace D602YesNo No
34Rx Section StartNo receiveNormal power supply of receiving circuit?YesNoCheck Rx power supply circuitRx squelch level is correct?Normal Rx LED? Rx frequency is correct?Rx signalling is correct?Speaker works well?Normal audio power amplifier?Normal Volume Selector knob?P29 and P25, which are pins of baseband processor ICU200, output signals well?Normal demodulators?Normal IF and mixing circuits?Normal RF mixing circuit?Change Rx frequencyChange Rx squelch levelReplace Rx LED D601Change Rx signallingReplace the speakerCheck audio power amplifier circuitReplace the Volume Selector knobCheck audio processor circuitCheck and replace CD300 and CF300Check Q105, U200 (P12,P21) and XF1Check local oscillator circuit Q501Check BPF circuit Q500Check antenna connectionYesYesYesYesYesYesYesYesYesNoNoNoNoCompletedYesYesNoNoNoNoNoNoNo
35MCU StartNormal power-on alert tone? Speaker works well?YesNoYesNoMCU clock crystal X601 works well? MCU operating voltage VCC works well?YesNo Check U606Replace X601NoYesCheck whether other control pins control well.MCU works wellYesNoCheck pin connection or recording programmeReplace the speaker
36Disassembly and Assembly Attaching the Battery ① Hold the battery and push it towards the top of the aluminum chassis under the belt clip of the radio. See figure 1. Note: Insert the tabs at the top of the battery into the top of the battery slots. Figure 1 ② Press the bottom of the battery until a “click” is heard to fasten the battery on the bottom of the radio. See figure 2. Note: If the battery is not fastened or is still adrift, please remove the battery and attach it again. Figure 2 Removing the Battery ①Turn 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. See figure 1. Figure 1
37 ② Release the battery latch and remove the battery when the bottom of the battery tilts. See figure 2. Note: To avoid serious abrasion between the tab on the top of the battery and the slot on the top of the radio, the angel between the radio unit and the tilting battery must not be too large. Figure 2 Attaching the Antenna ① Insert the threaded end of the antenna into the big threaded hole at the top of the radio. ② Rotate the antenna clockwise until it is fastened.
38 Removing the Antenna Rotate the antenna counter-clockwise to remove the antenna. Attaching the Belt Clip Loose the screw for the belt clip and fix the belt clip on the radio unit. Align the hole on the belt clip with that on the aluminum chassis and rotate the screw for the belt clip clockwise to fasten the clip. See figure 1. Figure 1 Removing the Belt Clip Please refer to the steps for attaching the belt clip when removing the belt clip. Loose the screw by rotating it counter-clockwise. See figure 2.
39 Figure 2 Attaching the External Earphone/Microphone ① Open the earphone/microphone jack cover (unnecessary to remove). See figure 1. Figure 1 ② Plug the earphone/microphone into the jack and fasten the screw. See figure 2. Figure 2
40Removing the External Earphone/Microphone Loose the screw and unplug the earphone/microphone. Note: When the external earphone/microphone is used, the radio’s waterproof performance will be affected.
41Exploded View TC-610 8910111213141516132765417181920212223242526272829303132333435
42 TC-620
43TC-610/620 Parts List 2 TC-610 No. Material No. Description Qty.1 6000631000000 Volume control knob 1 2 6201006000000 Inner liner knob 1 3 7207002200200 Nut 2 4 6100325000000 O-RING (knob) 2 5 1500006100000 Front case kit 1 6 6000634000000 Plastic PTT key 1 7 6100312000000 Silica rubber PTT key 1 8 6100307000000 Waterproof ring (main unit) 1 9 4303020000020 Volume control knob 1 10 4304030000010 Gray-code range switch 1 11 6100314000000 Waterproof ring (battery connector) 1 12 6100246000000 O_RING (antenna) 1 13 7102504000300 Machine screw 2 14 4400100008000 SMA-connector 1 15 4100510300000 PCB (PTT key) 1 16 7300029000000 Metal dome (3-key) 17 7102005000000 Machine screw 2 18 6000627000000 Rear cover (radio unit) 1 19 7102508000000 Machine screw 2 20 7400216000000 TC-610 waterproof PC sheet 2 21 6300051000000 Aluminum chassis 1 22 4100610100000 PCB (main board) 1 23 7102004020100 Self-tapping screw 9 24 5002220000050 MIC 1 25 5205000000190 Earpiece jack 1 26 5205000000280 Speaker jack 1 27 6100123000000 MIC cover 1 28 6100323000000 Holder (speaker jack) 1 29 7400184000000 Waterproof mic net 2 30 5001210000030 Speaker 1 31 6000127000000 Earpiece cover stopper 1 32 6000635000000 Earpiece cover 1 33 6000640000000 Light guide 1 34 6201066000000 Inner liner knob 1 35 6000630000000 Channel selector knob 1
44TC-620 No. Material No. Description Qty. 1 7102003500100 Machine screw 2 2 6000639000000 Earpiece cover 1 3 6300040000000 Decorative plate (zinc alloy) 1 4 6000127000000 Earpiece cover stopper 1 5 1500006200000 Front case kit 1 6 5001210000170 Speaker 1 7 7400141000000 NSM08Z01mic net 2 8 6100123000000 MIC cover 1 9 6100323000000 Holder (speaker jack) 1 10 7102004021030 Self-tapping screw ST2.0*3.8mm 10 11 5002220000050 MIC 1 12 5205000000280 Speaker jack 1 13 5205000000190 Earpiece jack 1 14 4100610100000 PCB (main board) 1 15 4100510300000 PCB (PTT key) 1 16 7300029000000 Metal dome (PTT key) (3-key) 1 17 6100314000000 Waterproof ring (battery connector) 1 18 6300051000000 Aluminum chassis 1 19 6100307000000 Waterproof ring (radio unit) 1 20 7400216000000 Waterproof transparent PC sheet 2 21 7102508000000 Machine screw M2.5*8.0mm 2 22 4400100008000 SMA-connector 1 23 7102504000300 Machine screw M2.5*4.0mm 2 24 7102005000000 Machine screw M2.0*5.0mm 2 25 6100246000000 O_RING (antenna) 1 26 6000629000000 Rear cover (radio unit) 1 27 4303020000020 Volume control knob 1 28 4304030000010 Gray-code range switch 1 29 6100325000000 O-RING (channel selector knob) 2 30 7207002200200 Nut M7.0*2.2mm 2 31 6201545000000 Speaker tablet 1 32 6000624000000 Light guide 1 33 6100312000000 Silica rubber PTT key 1 34 6000634000000 Plastic PTT key 1 35 6201006000000 Inner liner knob 1 36 6201066000000 Inner liner knob 1 37 6000631000000 Volume control knob 1 38 6000630000000 Channel selector knob 1
45Packing
46TC-610/620 PCB View
47TC-610/620 Block Diagram
1TC-610/620 Level Diagram Q1012SK508NV1W(BTL)200mVrms-120dBm -103dBm -67dBm-69dBm250mVrms-98dBm-108dBm-104dBm-122dBmLPFIFAmp 1 AF HPF VolumeMIX22ndIFBPFIFAmp 2DETde-emphasis23 25 29 44AF muteAN29160522116mVrms-10dBmQ102123D10437dBm39dBmQ400 2SC510812327dBmLPF2SK3475Q40221315dBm-8dBm450mVrmsstimulator power AMPMic AmpMic MuteAF HPF LMT SF AmpAN291605140MICROPHONE47KVR200C112AF AMPTDA2822150mVrms -26dBmD400D500SWQ401 2SK4988123-45dBmQ10412316Ω IWQ500AT41511RQA0002Q403213attenuatorstep1to23bufferQ5013SK3183241Q1002SK508NVBPF BPF38.85MC3dBmC130 C141VCOC400C405C402 C429C412TUNE BPF 1stIF BPFRF MIXERTUNE BPF LNATX PARTRX PARTRFAFRF AFIF
1TC-610/620 Schematic Diagram Specifications General Frequency Range 146－174 MHz 400－420 MHz 450－470 MHz Channel Capacity 16 Channel Spacing 25/12.5 MHz Operating Voltage 7.5V DC Battery Life （5-5-90 Duty Cycle） About 8 hours Operating Temperature -20～+50℃ Dimensions (H×W×D) TC-610:119mm x 54.6mm x 32.5mm (without antenna) TC-620:117mm x 54.3mm x 31mm (without antenna) Weight TC-610: 270g (with antenna) TC-620: 275g (with antenna) Frequency Stability ±2.5ppm Receiver Sensitivity -119dBm/-118dBm Adjacent Channel Selectivity ≥65(W)/55(N) Intermodulation ≥60dB Spurious Response Rejection ≥65dB Audio Power Output 1200mW Transmitter RF Power Output 5±0.5W(H)/2.0±0.3W(L) Spurious and Harmonics <1GHz: -36dBm/>1GHz: -30dBm Modulation Limitation 5 KHz/2.5KHz FM Noise 40dB(W)/35dB(N) Modulation Distortion ≤5% All Specifications are tested according to TIA/EIA-603, and subject to change without notice due to continuous development.
2HYT endeavors to achieve the accuracy and completeness of this manual, but no warranty of accuracy or reliability is given. All the specifications and design are subject to change without prior 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, stored in a retrieval 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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