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

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Date Submitted	2007-07-12 00:00:00
Date Available	2007-07-12 00:00:00
Creation Date	2007-06-22 12:31:34
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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)…………………………………….……
(U2) Schematic Diagram (MCU & POWER)………………………………………….…………
(U2) Schematic Diagram (VCO & RF)………………………………………….……
Specifications-----------------------------------------------------------------------81
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.
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.
This equipment should be serviced by qualified technicians only.
DO NOT operate the transmitter of radio unless all RF connectors are secure and any open
connectors are properly terminated.
Do not modify the radio for any reason.
Use only HYT original batteries and chargers.
Use only the supplied or an approved antenna.
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.
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.
Turn off your radio prior to entering any area with a potentially explosive atmosphere.
Do not charge your battery in a potentially explosive atmosphere.
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.
Do not expose the radio to direct sunlight over a long time, nor place it close to heating source.
When using your radio, hold the radio in a vertical position with the microphone 3 to 4
centimeters away from your lips.
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.
Radio Overview
TC-610
① PTT
② SK1 (programmable key)
③ SK2 (programmable key
⑤ Microphone
⑥ Antenna
⑦ LED
⑨ On-Off/Volume
Control Knob
⑬ Belt Clip
⑪ Earpiece
⑩ Battery Latch
⑧ Channel
Selector Knob
Jack
Programming Port
⑭ Battery
⑮ Belt Clip Screw
④ Speaker
and
⑫ Earpiece Cover
⑯ Charging Piece
TC-620
11
15
13
12
14 16
10
① PTT
② SK1 (programmable key)
③ SK2 (programmable key
⑤ Microphone
⑥ Antenna
⑦ LED
⑨ On-Off/Volume
Control Knob
⑬ Belt Clip
⑪ Earpiece
⑩ Battery Latch
⑧ Channel
Selector Knob
Jack
Programming Port
⑭ Battery
④ Speaker
⑮ Belt Clip Screw
and
⑫ Earpiece Cover
⑯ Charging Piece
PTT
Used to switch between transmitting and receiving modes. Hold down PTT and speak into the
microphone to transmit, while release it to receive.
SK1
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
LED flashes orange once.
the
slave
radio directly.
User
Source radio (After the
When cloning, LED flashes red.
Wired
slave radio is powered
When completed, red LED goes out.
Clone
on and the cloning cable
When failed, red LED goes out.
is connected, press SK2
on the source radio to
start cloning)
Slave radio
When cloning, LED flashes green.
When completed, green LED goes out.
The power-on alert tone sounds when the radio is
Powering On in User Mode
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.
LED glows red.
Transmit
When transmission times out, “BEEP” tone sounds
continuously.
TOT pre-alert: “BEEP” tone sounds once.
Receive
When a carrier is received, LED glows green.
When detecting, LED flashes green every second.
Scan start tone (programmable by your dealer): “BEEP”
tone sounds once.
Scan
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.
When switching from high power to low power, a
Power Adjust
descending tone sounds.
When switching from low power to high power, an
ascending tone sounds.
When enabling the VOX function, an ascending tone
VOX
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.
Turn 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
Circuit 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.
PLL
1.
Q5
Q6
BUFFER
D100
APC/TUNE
Q100
2SK508NV
L101
U605
D104
TX-VCO
D101
MB95F108AK
WPFV-GE1
T/R-SW
D102
Q101
2SK508NV
L102
RX-VCO
D103
12.8MHZ
LPF
1/2
CP
OSC
EN
32/33
U202
1/2
DATA
17bitDIV
CLK
21bitDIV
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.
U202 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
RQA0002
MATCH
LPF
R/TSW
L453
1u
Q401
2SC4988
Q403
Q402
2SK3475
Q400
2SC5108
Q104
2SC5108
ANTENNA
RF PA
3 Amplifier
RX
APC
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:
10
LNA
TUNE FROM MCU
C524
TUNE FROM MCU
Q500
C521
C505
C526
D506
D505
D504
D507
C523
C519
L508
D503
C506
L507
C504
L506
L502
TUNE BPF
L501
TUNE 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
AN29160
22nH
1stIF BPF
L530
C534
38.85MHZ
C532
C533
Q501
XF1
C531
C528
RF MIXER
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
11
is 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:
V_BAT
R420
R421
R422
R430
R432
R433
R434
Q431
DTA114Y E
U430
NJM2904
R431
C437
C438
2- +
R435
+ -6
R438
to RF PA(APC)
C435
R436
C434
R437
C436
R442
from MCU
R441
TX_VCC
R439
R440
C439
C440
C441
Q430
DTC114EE
R500
to 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.
12
Audio 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
cpu
volume
AF
mute
5th-HPF
AF
HPF
Mic amp
LIM
(TX)
sp Amp
SF
AMP(TX)
Tone
mic mute
U200
AN29160AA
PROCESSER
AFMOD
Q100
2SK508NV
D104
信令输入
TX-VCO
Pre
Emphasis
MIC
mic
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.
13
Block Diagram for Rx Audio&Signalling Process
2ndIF BPF
CF300
OUT
450KHz+/4.5K
To MCU
IN
IFAmp1
RSSI
IFAMP2
SPVCC
U200
AN29160AA
PROCESSER
VCC
EN
VCO TX RX MCU
POWERREG
IC
mix2
DET
5th-HPF
AF
HPF
Mic amp
VOX
LIM
(TX)
sp Amp
SF
AMP(TX)
mic mute
Tone
5th-LPF
BGR
tone-LPF
LATCH
volume
AF
mute
VREF
SQ
PE
DATA
信令输出
De
Emphasis
AUDIO OUT
16Ω IW
SW
To MCU
CDC/CTC
U201
AF
AMP
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.
14
MCU Control Section
The block diagram for the MCU control section is shown below. MCU works under the 7.3728MHz
clock frequency.
U609
Channel SW
1.vox
2.BUSY_DET
3.BEEP/CALL
4.T/R
5.SAVE
6.DC/CTC
7.W/N
8.UART
9.BAT_DET
10.PLL_LD
U605
APC/TUNE
MB95F108AK
WPFV-GE1
PLL
PTT
MON
7.3728M晶体
X601
BAT
U610
Reset
IC
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
15
Detect 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
POWER-SAVE
V-TX
5V
FMMT717
U606
Q611
Vout
VSS
Vin
FMMT717
7.2V
Q610
- - -
SW
Q612
601s
L604
UPA572T
TXC
SAVE
power management
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
16
(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:
Q202
2SA1832
R206 1K
Q201
2SK1824
47K
C212
0.1U
C213
1U
0.01U
MIC_EN
C260
220P
4.7K
1UH
RXD
R202 100
TP200
C202
0.1U
L200
EXPTT
R208
100K
R251
1M
R203
R204 470
C274
R205
R207
56K
1 3 4 2
VCC_5V
C201
470P
R201
2.2K
C200
4.7u/10V
R200
470
X1
J4
MICJACK
mic
VCC_5V
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.
17
When 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.
I/
Description
Pin Name
TC-610
TC-620
AVcc
Vcc
Vcc
Power supply pin for A/D, connecting power
supply
AVR
Vcc
Vcc
A/D reference input pin, connecting power
supply
PE3/INT13
PTT
PTT
PTT key (connected with pull-up resistor ) (valid
at low level)
PE2/INT12
A_KEY
A_KEY
SK1, programmable function key (connected
with pull-up resistor ) (valid at low level)
PE1/INT11
EXT-PTT
EXT-PTT
PTT key on the earpiece (connected with
pull-down resistor) (valid at high level)
PE0/INT10
B_KEY
B_KEY
SK2, programmable function key (connected
with pull-up resistor ) (valid at low level)
P83
ENC3
ENC3
P82
ENC2
ENC2
P81
ENC1
ENC1
10
P80
ENC0
ENC0
11
P71/TI0
T/R
T/R
O Tx-Rx switch control
12
P70/TO0
Reserve
Reserve
O Reserved
MOD
For down
-loading
For down
-loading
13
18
Encoder input of channel selector
knob(connected with pull-up resistor )
H(R)/L(T)
An operating mode designation pin. When
downloading, this pin is connected with Vcc and
a resistor of 47K is also connected between the
pin 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
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)
This port can not be used as IO and a capacitor
is connected between the port and the grounded
Vss.
Connecting pin of 7.3728MHzMHz master
crystal oscillator
18
PG0
19
PG2/X1A
OSC32K
OSC32K
20
PG1/X0A
OSC32K
OSC32K
21
/RST
RESET
RESET
22
P00/INT00
Reserve
Reserve
23
P01/INT01
Reserve
Reserve
24
P02/INT02
Reserve
Reserve
25
P03/INT03
Reserve
Reserve
26
P04/INT04
PLLEN2
PLLEN2
I/
PLL ENABLE
27
P05/INT05
PLLDATA
PLLDATA
I/
PLL DATA
28
P06/INT06
PLLCLK2
PLLCLK2
I/
PLL CLOCK
29
P07/INT07
UL2
UL2
I/ TB31202 PLL circuit unlock detect (H: Lock
O L Unlock)
(connected with pull-up resistor )
30
P10/UI0
RXD
RXD
UART RX (When recording, it is connected with
the UI recording port signals)
31
P11/UO0
TXD
TXD
UART TX (When recording, it is connected with
the UO recording port signals)
32
P12/UCK0
Reserve
Reserve
O Reserved
33
P13/TRG0/A
DTG
Reserve
Reserve
Reserved
34
P14/PPG0
MIC_EN
MIC_EN
Check whether the MIC is connected(connected
with pull-down resistor) (valid at high level)
Subsystem clock pin (Reserved）
Reset (When recording, it is connected with the
RSTX recording port signals.)
Reserved
35
P20/PPG00
CTC_DCS
CTC_DCS
W CTCSS/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
19
40
P50/SCL0
SCL
SCL
C EEPROM CLOCK
41
P51/SDA0
SDA
SDA
D EEPROM DATA
42
P52/PPG1
AP/TU
AP/TU
W Auto power control/adjust
43
P53/TRG1
TX_CTRL
TX_CTRL
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
52
P43/AN11
SPCNT
SPCNT
O Power supply control of main audio "H": audio ON
53
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
TI
I/
A CTCSS/CDCSS input
BUSY
I/
A Channel busy check (requiring 10-digit AD)
58
59
P35/AN05
P34/AN04
TI
BUSY
Tx power supply control
Transmission is on.
“H”: valid
For test (used to enter the factory clone mode,
connected with pull-up resistor)
60
P33/AN03
BAT_DET
BAT_DET
I/
A Battery voltage detect (requiring 10-digit AD)
61
P32/AN02
Reserve
Reserve
O Reserved
62
P31/AN01
Reserve
VOX
I/
A VOX detect (requiring 10-digit AD)
63
P30/AN00
Reserve
Reserve
O Reserved
64
AVss
GND
GND
Power supply (GND) pin for A/D, ground
20
Adjustment
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
21
clone 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
22
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.
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.
23
Hold 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
24
TC-610/620 Adjustment Items
Channel
10
11
12
13
14
Wide
Narrow
Freq. 1 Freq. 2 Freq. 3 Freq. 4 Freq.5 Freq. 1 Freq. 2 Freq. 3 Freq. 4 Freq. 5
Tx Section
Adjust preset RF power
Tx low power
Reserved channel (not adjust)
Tx high power
CDCSS deviation
CTCSS (67Hz) deviation
CTCSS (151.8Hz) deviation Y
CTCSS (254.1Hz) deviation Y
VOX gain1
VOX gain2
VOX gain3
VOX gain4
VOX gain5
Tx low voltage threshold
Rx Section
Carrier SQL level 1 ON
Carrier SQL level 5 ON
Carrier SQL level 9 ON
Carrier SQL level 1 OFF
Carrier SQL level 5 OFF
Carrier SQL level 9 OFF
Tx low voltage threshold
Bandpass filter
Adjustable Freq.
Note: Y indicates the valid adjustment frequency. The residual channels are idle and has no adjustment
items.
Switch 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
25
Tx 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.
Adjustment Item
Condition
Measurement
Test Equipment
Adjustment
Test Point
Part
Method
Specifications/
Remarks
Adjust VR300 with a
Rotate to
Tx frequency
tolerance
CH2. Press
PTT to
transmit.
ceramic alignment
screwdriver to limit
Radio
communication
Antenna
VR300
Adjust TC100 with a
ceramic alignment
CH1. Press
Tx VCO
lock voltage
≤150Hz
to the error range.
test set
Rotate to
PTT to
the center frequency
Digital voltmeter
CV
screwdriver until the
0.7V （+0.1V）
lock voltage is within
transmit.
TC100
the required range.
Rotate to
CH3. Press
Check
PTT to
≥2.3V
transmit.
Rx VCO
lock voltage
TC101
Rotate to
Adjust TC101 with a
ceramic alignment
CH1.
26
screwdriver until the
0.7V （+0.1V）
lock voltage is within
the required range.
Rotate to
Wide
Max.
Rotate
Deviation
Narrow
CH5
and
CH6
ceramic alignment
the deviation to the
communication
specified range.
test set
VR200
LPF: 15kHz
AF:1kHz
150mV
1.7-2.2KHz
Check
PTT
to transmit.
Antenna
Rotate to
Earpiece
CH1, CH2
jack
Adjust the audio
output signal of the
and CH3
communication
Modulation
to transmit.
test set
Sensitivity
Rotate
CH4,
CH5
and
CH6
test set to get the
deviation to 3.0KHz.
BPF: 0.3-3KHz
to
Adjust the audio
AF: 1KHz
output signal of the
10-20mV
radio communication
respectively.
Press
10-20mV
radio communication
Radio
respectively.
Press PTT
Narrow
3.7-4.3KHz
screwdriver to limit
Radio
respectively.
Press
Wide
Adjust VR200 with a
to
CH4,
≥2.3V
Check
CH3.
Rotate
to
CH1, CH2
and
CH3
respectively.
Press PTT
to transmit.
test set to get the
PTT
deviation to 1.5KHz.
to transmit.
Adjustments in the adjustment mode
Note: The antenna or load must be connected before adjusting.
Measurement
Adjustment Item
Condition
Rotate to CH4.
Press PTT to
Tx Power
enable
the
function.
Low frequency
High
Short
Test
Test Equipment
Point
communication test
set
Antenna
SK1
port
SK2
Ammeter
Remarks
Method
Press
SK1/SK2
to
increase/decrease the
output
press
rotate
power
the
and
channel
selector knob to save.
frequencies
periodically
to
Parts
Specifications/
Radio
PTT to switch
(refer
Adjustment
the
adjustment list)
27
4.5-5W
I≤1.7A
Rotate to CH2.
Press PTT to
enable
the
Press
function.
Short
to
increase/decrease the
Low frequency
Low
SK1/SK2
output
press
rotate
PTT to switch
power
the
and
channel
2W±0.3W
I≤1.2A
selector knob to save.
frequencies
periodically
(refer
to
the
adjustment list)
Adjust VR260 with a
Rotate to CH5.
Press PTT to
enable
the
function.
Low frequency
ceramic
Radio
alignment
screwdriver
communication test
Antenna
set
enable
to
the
waveform
LPF:0.3KHz
approximate to the
rectangular wave.
CDCSS Waveform
Short
VR260
press
PTT to switch
frequencies
periodically
Check
and long press
PTT to switch
between
wide
band
and
narrow band.
Rotate to CH5.
Press PTT to
CDCSS
enable
Deviation
VR601
the
SK1
function.
SK2
Wide band
Wide
Adjust VR601 with a
ceramic alignment
screwdriver check
Low frequency
each frequency.
Press PTT to
Adjust finely with SK1
switch
and SK2 to limit the
other
frequencies
CDCSS deviation to
(medium-low,
the required range if
medium,
necessary.
500-800Hz
medium-high
and high)
Narrow
Check
Long press
PTT (≥1.5s) to
enter narrow
band.
28
300-500Hz
Low frequency
Press PTT to
switch
other
frequencies
(medium-low,
medium,
medium-high
and high)
Rotate
to
CH6, CH7 and
CH8
Wide
respectively
Adjust VR601 with a
and CTCSS is
ceramic alignment
set
to
low,
screwdriver and check
medium
and
each frequency.
high.
Adjust finely with SK1
Press
and SK2 to limit the
PTT to enable
this function.
Wide band
CTCSS
Short
Deviation
press
PTT to switch
frequencies on
500-800Hz
CTCSS deviation to
Radio
communication test
set
Antenna
VR601
the required range if
SK1
necessary.
SK2
LPF:0.3KHz
each channel.
Long
press
PTT (≥1.5s) to
enter
Narrow
narrow
band on CH6,
Check
CH7 and CH8
300-500Hz
and short press
PTT to switch
frequencies.
6.2V-7.0V(≤7.0V:
Low Tx Voltage
Threshold
Low voltage
Power-Off Level
Power
Digital voltmeter
supply
port
Power
Digital voltmeter
supply
port
29
Adjust the output
Power
voltage of the power
supply
supply and check the
alarm level
LED flashes;
≤6.2V: the alarm
tone sounds and
transmission
suspended)
Adjust the output
Power
voltage of the power
supply
supply and check the
power-off level
<5.80V
Item
Condition
Test Equipment
Parts
Sensitivity
(bandpass)
Short press
PTT to switch
other
frequencies.
SINAD is within the
Radio
communication
Rx
Specification/
Remarks
Check whether
Rotate to CH8.
Low frequency
Method
test set
SSG:-119dB
MOD:1KHz
DEV:3.0KHz
range and whether to
Antenna
get SINAD≥12dB by
Remote
SK1
adjusting SK1 or SK2.
speaker MIC
SK2
Rotate the channel
jack
selector knob to save
after the five-point
Filter: 0.3-3KHz
adjustment is
Adjust the
volume control
knob to the
right place,
which will not
limit the output.
SINAD≥12dB
completed.
Rotate to CH2
and SQL is set
to level 5 ON.
Wide
Press SK1 or
Adjust the output
SK2 to enable
signals of SSG to the
the function.
squelch level. Rotate
SQL level:
The channel
the channel selector
-119±1dB
spacing is wide
knob to save after the
band.
Low frequency
Short press
SQL
ON
communication
test set
PTT to switch
SSG:-119dB
frequencies.
MOD:1KHz
Long press
DEV:1.5KHz
PTT (≥1.5s) to
five-point adjustment
Radio
Remote
SK1
speaker MIC
SK2
jack
Filter: 0.3-3KHz
Adjust the output
enter narrow
signals of SSG to the
band. Press
Narrow
is completed.
Antenna
squelch level. Rotate
SK1 or SK2 to
the channel selector
enable this
knob to save after the
function. Short
five-point adjustment
press PTT to
is completed.
switch
frequencies.
30
SQL level:
-118±1dB
Rotate to CH5
and SQL is set
to level 5 OFF.
Adjust the output
Press SK1 or
SK2 to enable
Wide
the
function.
The
channel
spacing is wide
band.
signals of SSG to the
Radio
Antenna
communication
Remote
SK1
test set
speaker MIC
SK2
SSG:-121dBm
jack
Short
SQL level:
the channel selector
-121±1dB
knob to save after the
five-point adjustment
is completed.
Low frequency
SQL
squelch level. Rotate
press
PTT to switch
OFF
frequencies.
Long
press
PTT (≥1.5s) to
Narrow
enter
narrow
band.
Press
SK1 or SK2 to
enable
this
function. Short
Adjust the output
signals of SSG to the
Radio
Antenna
communication
Remote
SK1
test set
speaker MIC
SK2
SSG:-120dBm
jack
squelch level. Rotate
the channel selector
knob to save after the
SQL level:
-120±1dB
five-point adjustment
press PTT to
is completed.
switch
frequencies.
Adjust the output
voltage of the power
Rx Low Voltage
supply and check the
Threshold
alarm level (LED
Digital voltmeter
Power supply
Power
flashes red and the
port
supply
alarm tone sounds)
≤6.50V
Adjust the output
Low
voltage of the power
Voltage
supply and check the
Power-Off Level
power-off level.
31
<5.80V
Appendix: Reference Voltage Setting of Battery Capacity
Check in transmitting mode
LED
>7.35V
18min
LED
7.15V - 7.35V
12min
Red LED (30%-50%)
7.00V - 7.15V
12min
LED
6.20V - 7.00V
18min
Green
(70%-100%)
Orange
(50%-70%)
flashes
red
5.80V - 6.20V
LED flashes red
+an alarm tone
sounds
every
10
Halt
<5.80V
Check in transmitting and standby mode (or press the battery capacity
check key.
Green LED
>7.55V
18min
(70%-100%)
Orange LED
7.35V-7.55V
12min
7.00V-7.35V
20min
LED flashes red (<30%)
6.50V-7.00V
18min
LED flashes red
5.80V-6.50V
(50%-70%)
Red LED
(30%-50%)
+an alarm tone sounds
every 10 seconds.
Halts
<5.80V
32
Troubleshooting Flow Chart
Tx Section
Start
Low Tx
power
No voice during
transmission
No
transmission
Normal Tx
power supply?
Tx LED not
light
No
Check Tx
power supply
No
Tx VCO is
locked?
Replace
D602
Yes
Check voice channel
(MIC, VR200 and
D104)
D602 glows
red?
No
Yes
Replace
D602
Check Tx
channel
Check antenna
connection
Check Q400, Q401,
Q402 and Q403
33
Check APC
control circuit
Check Tx
VCO
Rx Section
Start
No receive
Normal power
supply of receiving
circuit?
No
Check Rx power
supply circuit
Yes
Normal Rx LED?
No
No
Change Rx
signalling
Rx squelch level is
correct?
Yes
Yes
Speaker works
well?
No
Replace the
speaker
Replace Rx
LED D601
Yes
Normal audio
power amplifier?
No
Check audio
power amplifier
circuit
Yes
Normal Volume
Selector knob?
No
Replace the
Volume
Selector knob
Yes
P29 and P25, which are pins of
baseband processor ICU200,
output signals well?
No
Check audio
processor
circuit
Yes
Normal
demodulators?
No
Check and
replace CD300
and CF300
Yes
Normal IF and
mixing circuits?
No
Check Q105,
U200 (P12,P21)
and XF1
Yes
Normal RF mixing
circuit?
No
Check local
oscillator circuit
Q501
Yes
Check BPF
circuit Q500
No
Change Rx
frequency
Yes
Yes
Rx signalling is
correct?
Rx frequency is
correct?
Check antenna
connection
Completed
34
No
Change Rx
squelch level
MCU
Start
Normal power-on alert
tone?
Yes
No
Speaker works well?
No
Replace the
speaker
Yes
MCU operating voltage
VCC works well?
No
Check U606
Yes
MCU clock crystal X601
works well?
No
Replace X601
Yes
Check whether other
control pins control well.
No
Check pin
connection or
recording
programme
Yes
MCU works
well
35
Disassembly 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
① Turn off the radio. Hold the upper side of the radio and press the belt clip until it tilts. Push the
battery latch upwards along the slot of the battery latch at the bottom of the battery. See figure 1.
Figure 1
36
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
②
Insert the threaded end of the antenna into the big threaded hole at the top of the radio.
Rotate the antenna clockwise until it is fastened.
37
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.
38
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
39
Removing 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.
40
Exploded View
TC-610
35
34
33
32
31
30
29
10
28
11
27
12
26
25
13
14
24
15
23
22
16
21
17
20
18
19
41
TC-620
42
TC-610/620 Parts List 2
TC-610
No.
Material No.
Description
6000631000000
Volume control knob
6201006000000
Inner liner knob
7207002200200
Nut
6100325000000
O-RING (knob)
1500006100000
Front case kit
6000634000000
Plastic PTT key
6100312000000
Silica rubber PTT key
6100307000000
Waterproof ring (main unit)
4303020000020
Volume control knob
10
4304030000010
Gray-code range switch
11
6100314000000
Waterproof ring (battery connector)
12
6100246000000
O_RING (antenna)
13
7102504000300
Machine screw
14
4400100008000
SMA-connector
15
4100510300000
PCB (PTT key)
16
7300029000000
Metal dome (3-key)
17
7102005000000
Machine screw
18
6000627000000
Rear cover (radio unit)
19
7102508000000
Machine screw
20
7400216000000
TC-610 waterproof PC sheet
21
6300051000000
Aluminum chassis
22
4100610100000
PCB (main board)
23
7102004020100
Self-tapping screw
24
5002220000050
MIC
25
5205000000190
Earpiece jack
26
5205000000280
Speaker jack
27
6100123000000
MIC cover
28
6100323000000
Holder (speaker jack)
29
7400184000000
Waterproof mic net
30
5001210000030
Speaker
31
6000127000000
Earpiece cover stopper
32
6000635000000
Earpiece cover
33
6000640000000
Light guide
34
6201066000000
Inner liner knob
35
6000630000000
Channel selector knob
43
Qty.
TC-620
No.
Material No.
Description
Qty.
7102003500100
Machine screw
6000639000000
Earpiece cover
6300040000000
Decorative plate (zinc alloy)
6000127000000
Earpiece cover stopper
1500006200000
Front case kit
5001210000170
Speaker
7400141000000
NSM08Z01mic net
6100123000000
MIC cover
6100323000000
Holder (speaker jack)
10
7102004021030
Self-tapping screw ST2.0*3.8mm
10
11
5002220000050
MIC
12
5205000000280
Speaker jack
13
5205000000190
Earpiece jack
14
4100610100000
PCB (main board)
15
4100510300000
PCB (PTT key)
16
7300029000000
Metal dome (PTT key) (3-key)
17
6100314000000
Waterproof ring (battery connector)
18
6300051000000
Aluminum chassis
19
6100307000000
Waterproof ring (radio unit)
20
7400216000000
Waterproof transparent PC sheet
21
7102508000000
Machine screw M2.5*8.0mm
22
4400100008000
SMA-connector
23
7102504000300
Machine screw M2.5*4.0mm
24
7102005000000
Machine screw M2.0*5.0mm
25
6100246000000
O_RING (antenna)
26
6000629000000
Rear cover (radio unit)
27
4303020000020
Volume control knob
28
4304030000010
Gray-code range switch
29
6100325000000
O-RING (channel selector knob)
30
7207002200200
Nut M7.0*2.2mm
31
6201545000000
Speaker tablet
32
6000624000000
Light guide
33
6100312000000
Silica rubber PTT key
34
6000634000000
Plastic PTT key
35
6201006000000
Inner liner knob
36
6201066000000
Inner liner knob
37
6000631000000
Volume control knob
38
6000630000000
Channel selector knob
44
Packing
45
TC-610/620 PCB View
46
TC-610/620 Block Diagram
47
TC-610/620 Level Diagram
TX PART
-45dBm
-26dBm
VCO
buffer
SF Amp
C130
C141
D400
C400
C402
Q402
2SK3475
Q403
RQA0002
C405
C429
C412
Q101
2SK508NV
D104
51
Mic Mute
37dBm
LPF
power AMP
Q104
39dBm
Q401 2SK4988
40
Q102
27dBm
LMT
15dBm
stimulator
Q100
2SK508NV
C112
AF HPF
Mic Amp
3dBm
Q400 2SC5108
AN29160
MICROPHONE
-8dBm
150mVrms
450mVrms
16mVrms
attenuator
step1to23
200mVrms
VR200
47K
D500
AF
RF
RX PART
-10dBm
LPF
-120dBm
-122dBm
-104dBm
-108dBm
-98dBm
-103dBm
-67dBm
250mVrms
1W(BTL)
-69dBm
TUNE BPF
LNA
TUNE BPF
RF MIXER
1stIF BPF
AN29160
23
Q501
AT41511
3SK318
BPF
BPF
IFAmp 1
Q500
AF AMP
2ndIF
BPF
TDA2822
de-emphasis
25
29
44
IFAmp 2
AF HPF
21
AF mute
Volume
52
MIX2
DET
RF
38.85M
SW
IF
AF
16Ω IW
TC-610/620 Schematic Diagram
Specifications
General
146－174 MHz
400－420 MHz
Frequency Range
450－470 MHz
Channel Capacity
16
Channel Spacing
25/12.5 MHz
Operating Voltage
7.5V DC
Battery Life
Cycle）
（ 5-5-90
Duty
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)
TC-610: 270g (with antenna)
TC-620: 275g (with antenna)
Weight
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
Spurious and Harmonics
5±0.5W(H)/2.0±0.3W(L)
<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.
HYT 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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