Manual
Content
General……………………………………………………………………………2
Brief Introduction………………………………………………………………..3
Software Description…………………………………………………………..5
Circuit Description……………………………………………………………..9
CPU Pins…………………………………………………………………………13
Part List 1………………………………………………………………………..15
Adjustment Description……………………………………………………….22
Disassembly and Assembly………………………………………………..25
Exploded View………………………………………………………………..28
Part List 2……………………………………………………………………….29
Packing…………………………………………………………………………..30
PC Board View………………………………………………………………….31
Block Diagram…………………………………………………………………..33
Schematic Diagram…………………………………………………………..34
Specifications…………………………………………………………………35
-1-
TC-500 General
General
Manual Scope
This manual is intended for use by experienced technicians familiar with similar types of
communication equipment. It contains all service information required for the equipment and is
current as of the publication date.
User Safety Information
The following precautions are recommended for personnel safety:
DO NOT transmit until all RF connectors are verified secure and any open connectors are properly
terminated.
SHUT OFF and do not operate this equipment near electrical blasting caps or in an explosive
atmosphere.
When in vehicles with an airbag, do not place a portable radio in the area over an airbag or in the
airbag deployment area.
Do not expose the radio to direct sunlight for a long time nor place it close to a heating source.
Do not use any portable radio with a damaged antenna. If a damaged antenna comes into contact
with your skin, a minor burn may result.
When transmitting with a portable radio, hold the radio in a vertical position with its microphone about
5 centimeters away from your mouth.
If you wear a portable radio on your body, be sure to keep the antenna at least 2.5 centimeters away
from your head or body when transmitting.
This equipment should be serviced by qualified technicians only.
-2-
TC-500 Brief Introduction
Brief Introduction
2
3
4
1
12
8
5
6
9
11
7
10
13
1.
2.
3.
4.
5.
6.
7.
8.
Antenna
LED indicator
The light will glow red during transmission. The light will glow green during receiving. During
transmission, the light flashes red when the battery voltage is low.
Channel selector knob
Turn the channel selector knob to select from channels 1-16 (Channel 16 can be programmed by your
dealer as scan function).
Power/Volume control knob
Rotate the Power/Volume Knob clockwise until a “click” is heard to turn the radio on, fully counter
clockwise until a “click” is heard to turn the radio off. When the radio is on, turn the knob to adjust
volume.
PTT key
Press and hold PTT key to talk, release to receive.
Monitor key
In receive mode, long press (above 2 seconds) Monitor key to monitor activity on the current channel.
Microphone
Speaker
-3-
TC-500 Brief Introduction
9. External jack
Remove the jack cover and insert an earphone; or insert programming cable into the jack to
programme the radio via programming software.
10. Battery
11. Belt clip
Used to clip radio on your belt.
12. Battery latch
Used to fasten and remove the battery.
13. Charging connectors
Connect the charging connectors with that on the charger to begin charging.
-4-
TC-500 Software Specification
Software Specification
Radio Feature Description
1.
Use channel selector knob to choose from 15+1(Scan) channels
2.
Monitor
3.
CTCSS/CDCSS
Non-standard Model (Other): 38+83 groups
4.
Channel Spacing
12.5KHz/25KHz Narrow/wide Optional
5.
Channel Scan (Priority channel and scan revert channel available)
6.
Battery Save feature (Dealer programmable)
7.
Time-out Timer (TOT)
8.
High/low Power Switch
9.
Squelch Level Control (9 levels)
10. Low Battery Alert
11. Model Set Mode
12. PC Programming and Adjusting Mode
13. User Wired Clone Mode
14. Factory Wired Clone Mode
15. Manual Adjust Mode
1.
Radio Modes
User Mode:
User mode is conventional communication mode. Turn the power on while disconnecting the two SELF points, the
radio enters user mode. (Refer to “TC-500 Owner’s Manual” for details about operation in this mode.)
2.
Model Set Mode
(1) If the radio is standard model, short out the two MS2 points on PCB and then operate following the steps (3) (5) and (6).
If the radio is non-standard model, please disconnect the two MS2 points on PCB and then operate the following
steps.
(2) To select MS1 (See the initial data table) according to the radio model, if MS1 is 1, short out the two MS1 points on
PCB and continue the following operation. If not, disconnect the two MS1 points and continue.
(3) Short out the two SELF points on PCB and then turn the power on. Two beeps sound.
(4) Turn channel selector knob to the corresponding position (1-11) according to the radio model (Refer to the initial data
table).
(5) Press PTT key while holding down MONI key to set the model. Channel data and settings are initialized (Refer to the
initial data table).
(6) Turn off the power and then disconnect the two SELF points on PCB to complete the model setting.
For example, MS1 of TC-500-U (450.000~469.995MHz) is 0 (See the initial data table). Its number is 7. It is unnecessary to
short out MS1 and MS2. To initialize its model and channel data, you can operate as following:
(1) Short out the two SELF points on PCB;
(2) Turn on the power and turn the channel selector knob to the position 7;
-5-
TC-500 Software Specification
(3) Press PTT key while holding down MONI key;
(4) After data reset, turn off the power, disconnect the two SELF points and restart the power to use the radio.
Remarks: The old data (frequency, CTCSS/CDCSS, channel function settings) will be changed once the model is set, and
part of functions will also be changed. Therefore, do not make this operation unless it’s very necessary, such as changing
the EEPROM, etc.
3. PC Programming Mode
The following parameters can be set through programming software:
1
Receive frequency and transmit frequency
2
Receive signaling and transmit signaling
3
Busy channel lockout
4
Time-out timer
5
Squelch level
6
Battery save
7
Audio alarm
8
Monitor mode
9
Scan mode
10
Scan revert channel
11
Priority scan channel
12
N/W Model
13
High/low power
14
N/W setting
-6-
TC-500 Software Specification
4. PC Adjusting Mode
The following parameters can be set via PC programming software:
(1)
Low battery alert level
(2)
Squelch level 9
(3)
Squelch level 3
(4)
CTCSS deviation (wide)
(5)
CDCSS deviation (wide)
(6)
CTCSS deviation (narrow)
(7)
CDCSS deviation (narrow)
5. Manual Adjust Mode
If manual adjust mode is enabled, turn on the power while holding down PTT and MONI simultaneously, the radio enters
manual adjust mode after 2 seconds. Choose the adjusting items by turning the channel selector knob to CH1-CH7
position; use PTT (upwards) or MONI (downwards) to adjust (Note: MIC jack shouldn’t be connected with external cable
while adjusting), CH1-CH7 positions are defined as follows:
(1)
Low battery alert level
(2)
Squelch level 9
(3)
Squelch level 3
(4)
CTCSS deviation (wide)
(5)
CDCSS deviation (wide)
(6)
CTCSS deviation (narrow)
(7)
CDCSS deviation (narrow)
CH13-CH16 are used to adjust transmitter and receiver. Press PTT to transmit; release to receive. CH13-CH16 are defined
as follows:
(13)
Center frequency (difference between transmit and receive frequency is 0.1MHz)
(14)
Lowest frequency (difference between transmit and receive frequency is 0.1MHz)
(15)
Highest frequency (difference between transmit and receive frequency is -0.075MHz)
(16)
Center frequency: transmit with 250.3Hz CTCSS tone (difference between transmit and receive frequency is
0.1MHz)
Note:
To enable or disable manual adjust mode: short out the two SELF points, turn on the power to enter model set mode.
And then the manual adjust mode is enabled. Press [PTT], manual adjust mode is disabled. This mode is suggested to
be disabled after the adjustment is completed.
6. User/Factory Wired Clone Mode
Turn on the power while holding down MONI, the radio enters wired clone mode.
(1) If the two SELF points are disconnected, press MONI again to begin user wired clone and red LED blinks; When
cloning is completed, red LED goes out.
(2) If the two SELF points are short circuit, press MONI again to begin factory wired clone and red LED blinks; When
cloning is completed, red LED goes out.
Note: The difference between user wired clone mode and factory wired clone mode is that the latter is able to clone tune
parameters.
-7-
TC-500 Software Specification
Initial data table
MS1
Model
1CH(Center)
Frequency (MHz)
IF (MHz)
Tx
Rx
2CH(Low)
Tx
3CH(High)
Rx
Tx
4CH
5CH
6CH
7CH
8CH
9-16CH
(MHz)
Rx
(MHz)
(MHz)
(MHz)
(MHz)
(MHz)
(MHz)
(MHz)
(MHz)
(MHz)
(MHz)
(MHz)
0
1
150.000~173.995
+21.4
162.000
162.100
150.000
150.100
173.975
173.900
162.500
162.550
162.600
162.550
162.650
0
2
136.000~149.995
+21.4
143.000
143.100
136.000
136.100
149.975
149.900
143.500
143.550
143.600
143.550
143.650
0
3
146.000~173.995
+21.4
160.000
160.100
146.000
146.100
173.975
173.900
160.500
160.550
160.600
160.550
160.650
0
4
144.000~147.995
+21.4
146.000
146.100
144.000
144.100
147.975
147.900
146.500
146.550
146.600
146.550
146.650
0
5
136.000~147.995
+21.4
142.000
142.100
136.000
136.100
147.975
147.900
142.500
142.550
142.600
142.550
142.650
0
6
136.000~173.995
+21.4
155.000
155.100
136.000
136.100
173.975
173.900
155.500
155.550
155.600
155.550
155.650
0
7
450.000~469.995
-21.4
460.000
460.100
450.000
450.100
469.975
469.900
460.300
460.350
460.400
460.350
460.450
0
8
400.000~419.995
-21.4
410.000
410.100
400.000
400.100
419.975
419.900
410.500
410.550
410.600
410.550
410.650
0
9
470.000~489.995
-21.4
480.000
480.100
470.000
470.100
489.975
489.900
480.500
480.550
480.600
480.550
480.650
0
10
490.000~511.995
-21.4
501.000
501.100
490.000
490.100
511.975
511.900
501.500
501.550
501.600
501.550
501.650
0
11
220.000~239.995
-21.4
230.000
230.100
220.000
220.100
239.975
239.900
230.500
230.550
230.600
230.550
230.650
1
1
240.000~259.995
-21.4
250.000
250.100
240.000
240.100
259.975
259.900
250.500
250.550
250.600
250.550
250.650
1
2
336.000~367.995
-21.4
352.000
352.100
336.000
336.100
367.975
367.900
352.500
352.550
352.600
352.550
352.650
1
3
368.000~395.995
-21.4
382.000
382.100
368.000
368.100
395.975
395.900
382.500
382.550
382.600
382.550
382.650
1
4
370.000~389.995
-21.4
380.000
380.100
370.000
370.100
389.975
389.900
380.500
380.550
380.600
380.550
380.650
1
5
350.000~369.995
-21.4
360.000
360.100
350.000
350.100
369.975
369.900
360.500
360.550
360.600
360.550
360.650
1
6
406.000~429.995
-21.4
418.000
418.100
406.000
406.100
429.975
429.900
418.500
418.550
418.600
418.550
418.650
1
7
400.000~429.995
-21.4
415.000
415.100
400.000
400.100
429.975
429.900
415.500
415.550
415.600
415.550
415.650
1
8
430.000~439.995
-21.4
435.000
435.100
430.000
430.100
439.975
439.900
435.500
435.550
435.600
435.550
435.650
1
9
438.000~449.995
-21.4
444.000
444.100
438.000
438.100
449.975
449.900
444.500
444.550
444.600
444.550
444.650
1
10
480.000~519.995
-21.4
500.000
500.100
480.000
480.100
519.975
519.900
500.500
500.550
500.600
500.550
500.650
1
11
441.000~451.000
-21.4
446.000
446.100
441.000
441.100
450.975
450.900
446.500
446.550
446.600
446.550
446.650
446.00625~446.09375
-21.4
446.00625
446.00625
446.01875
446.01875
446.03125
446.03125
446.04375
446.05625
446.06875
446.08125
446.09375
OFF
OFF
OFF
OFF
OFF
OFF
OFF
023
023
127.3
151.4
Standard
CH QT/DQT
Note: For standard model, CTCSS is off in all channels after initialization.
-8-
TC-500 Circuit Description
Circuit Description
1.
Frequency Configuration
The receiver utilizes double conversion superheterodyne. The first IF is 21.4MHz and the second is
455KHz. The first local oscillator signal is supplied from PLL circuit. Frequency needed in the
transmitter is supplied from PLL circuit. Figure 1 shows the frequency configuration.
Frequency Range: 400 MHz—420MHz
450 MHz—470MHz
136 MHz—150MHz
150 MHz—174MHz
Figure 1 frequency configuration
2.
Receiver
The receiver utilizes double conversion superheterodyne.
1) Front-end RF Amplifier
The input signal from antenna is amplified in RF amplifier (Q27) after passing through the
receive/transmit switch circuit and a 3-stage LC band pass filter. The amplified signals are
filtered by a band pass filter (a 3-stage LC BPF) to eliminate unwanted signals before they
goes to the first frequency mixer.
Figure 2 receiver section configuration
-9-
TC-500 Circuit Description
2) The First Mixer
The signal from RF amplifier is mixed with the first local oscillator signal from PLL frequency
synthesizer in the first mixer (Q23) to generate a 21.4MHz first IF signal. The first IF signal is then fed
through two monolithic crystal filters (XF1) to remove spurious signals from adjacent channels.
3) IF Amplifier
The first IF signal is amplified in Q22 and then enters the IF process chip IC1. The signal is mixed with
the second local oscillator signal in IC1 to create a 455KHz second IF signal. The second IF signal is
then fed to a 455KHz ceramics filter (CF1) to eliminate unwanted signals before it is amplified and FM
detected in IC1.
4) AF Amplifier
The demodulated AF signal obtained from IC1 is amplified in IC7 (1/4), and then filtered by low pass
filter Q19 and high pass filter Q20, and then de-emphasized by R130 and C156. The resulting AF
signal passes through a volume control circuit and then is amplified to a sufficient level to drive the
speaker by AF power amplifier (IC8).
5) Squelch
Part of the AF signal from IC1 enters IC1 again, and the noise component is amplified and rectified by
a filter and an amplifier to produce a DC voltage corresponding to the noise level. The DC signal from
IC1 goes to the analog port of the microprocessor (IC11). IC11 determines whether to output sounds
from the speaker by detecting whether the input voltage is higher or lower than preset value.
To output sounds from the speaker, IC11 sends a high level signal to the MUTE and AFCO lines and
turns IC8 on through Q12.
FM IF IC1
IC7
IF AMP
DET
DET
HPF
AMP
AF
LPF
HPF
SW
AF/PF AMP
IC8
SP
Q12
SW
IC7
LPF
2
39 40
1
TI
MUTE
AFCO
BUSY
IC11
MCU
Figure 3. AF amplifier and squelch circuit
- 10 -
TC-500 Circuit Description
6) Receive signaling
CTCSS/CDCSS
Audio frequencies over 300Hz of the output signal from IC1 is cut off by a low-pass filter. The resulting
signal enters the microprocessor IC11. IC11 determines whether the CTCSS/CDCSS matches the
preset value and controls the MUTE and AFCO and the speaker sound output according to the
squelch results.
3.
PLL Frequency Synthesizer
PLL circuit generates the first local oscillator signal for reception and the RF signal for
transmission.
1) PLL Circuit
The step frequency of PLL circuit is 2.5KHz or 6.25 KHz. A12.8MHz reference oscillator
signal is divided at IC2 by a fixed counter to produce a 2.5 KHz or 6.25 KHz reference
frequency. Output signal from voltage control oscillator (VCO) passes through buffer
amplifier Q14 and is divided at IC2 by the dual-module programmable counter. The
divided signal is compared in the phase comparator IC2 with the 2.5 KHz or 6.25 KHz
reference signal. The output signal from phase comparator is filtered through a low-pass
filter and passed to the VCO to control the oscillator frequency. (See figure 4)
Figure 4 PLL circuit
2) VCO
The operating frequency is generated by Q16 in transmit mode and by Q8 in receive mode.
The operation frequency generates a voltage through the phase comparator to control the
varactor diodes, so as to keep the oscillator frequency consistent with the preset frequency
in CPU (D2 and D3 in transmit mode and D7 and D8 in receive mode). T/R pin is set high in
receive mode causing Q6 to turn off Q16 and turn Q7 on. The T/R pin is set low in transmit mode. The
output from Q8 and Q16 is amplified by Q14 and sent to the buffer amplifier.
- 11 -
TC-500 Circuit Description
4.
Transmitter
1) Transmit audio
The audio signal from microphone is amplified through IC3, and then pre-emphasized , and then
filtered by another low-pass filter separate filter (Q25 and Q24) to eliminate the frequencies over
3KHz. The resulting signal enters the VCO for direct FM modulation. (See figure 5)
2) CTCSS/CDCSS Encoder
The necessary frequency for CTCSS/CDCSS encoder is generated by IC11 and FM-modulated to
the PLL reference signal. Since the reference OSC does not modulate the loop characteristic
frequency or higher, modulation is performed at the VCO side by splitter. (See figure 5)
Figure 5 transmit CTCSS
3)
RF amplifier
The transmit signal obtained from VCO buffer amplifier Q14 is amplified by Q15 and Q17. This
amplified signal is passed to power amplifier Q32 and Q31, and is capable of producing a 4.0W RF
power.
4) Antenna Switch and LPF
The RF amplifier output signal is passed through a low-pass filter network and a transmit/receive
switch circuit before it is passed to the antenna terminal. The transmit/receive switch circuit is
comprised of D11 and D12. D11 and D12 is turned on in transmit mode and off in receive mode.
5. Power
The 5V reference power supply for the control circuit is derived from an internal battery. The reference
power provides a 5V supply in transmit mode [T_V], a 5V supply in receive mode [R_V], and a 5V
supply shared in both modes based the control signal from the microprocessor.
6. Control System
The IC11 CPU operates at 7.3728MHz.
- 12 -
TC-500 CPU Pins
CPU Pins
PIN No.
PIN NAME
I/O
DESCRIPTION
1
TI
I
CTCSS/CDCSS input
2
BUSY
I
Input busy signal
3
BATT
I
Detect battery voltage
4
TIBI
I
CTCSS/CDCSS exterior circuit central point input
5
NC
6
SAVE
O
Power saving control
7
TXLow
O
Transmitter power control
8
NC
9
DAT
O
data output
10
CLK
O
clock output
11
LE
O
PLL IC enable
12
BEEP
O
Beep output
13
SCL
O
E2PROM clock cable
14
SDA
I/O
E PROM data cable
15
MUTE
O
MIC mute control
16
MS1
I
Model set
17
GREEN
O
Green light control
H: light
18
RED
O
Red light control
H: light
19
TXD
O
RS-232C output
20
RXD
I
RS-233C input
21
PTTK
I
PTT key input
22
MS2
I
Standard model select
23
RXC
O
Receiver power control
24
NC
25
RESET
I
Reset input
26
SELF
I
Self-program
27
TXC
O
Transmitter power control
28
XIN
I
Oscillator input
29
XOUT
O
Oscillator output
30
Vss
I
Grounding
31
R/T
O
TX/RX control
32
UL
I
PLL unlock detector
33
IF-SELECT
I
IF select
34
MONIK
I
MONI key input
35
ENC0
I
Channel selector knob encode input
36
ENC1
I
37
ENC2
I
H: OFF
L: ON
H: Low power L: High power
2
- 13 -
H: Mic mute
L: Mic enable
H: Non-standard L: Standard
L: power on
L: on
H:on
H RX
L
H: Lock
H: 21.4MHz
TX
L: unlock
L: 45.05MHz
TC-500 CPU Pins
38
ENC3
I
39
AFMUTE
O
Audio muting control
40
AFP
O
Audio power control
41
TONE5
O
CTCSS code output
42
TONE4
O
CTCSS code output
43
TONE3
O
CTCSS code output
44
TONE2
O
CTCSS code output
45
TONE1
O
CTCSS code output
46
TONE0
O
CTCSS code output
47
WNTC
O
W/N L: Wide
I
Power input: 5V
H: Narrow
47-70
NC
71
Vcc
72
VREF
I
A-D converse reference voltage
73
Avss
I
A-D GND
74-77
NC
78
NC
79
NC
80
NC
- 15 -
TC-500 Adjustment Description
Adjustment Description
The radio can be adjusted with PC programming software or by manual adjustment. Manual adjustment
procedure of TC-500 is as follow. (Refer to “model set mode” and “manual adjust mode” in the section
Software Specification.)
Instrument:
Radio Communication Test Set
1 set
Scanner
1 set
3A/10V Power Supply
1 set
Digital Voltmeter
1 set
3A Ammeter
1 set
Adjustment:
1. Initializing:
It’s necessary to set the model and initialize the radio before alignment because there is no needed
information in EEPROM when the radio is manufactured. Please refer to the “model set mode” in the
section Software Specification for details.
2. Adjustment:
Some items can be adjusted in conventional communication mode and the others in manual adjust
mode. Turn on the power, the radio enters conventional communication mode. If manual adjust mode
is enabled, turn on the power while holding down PTT and MONI simultaneously, the radio enters
manual adjust mode after 2 seconds. (Refer to the section Software Specification.)
VCO
Measurement
Item
Adjustment
Test Instrument
Terminal
Part
Method
TC1
3.0V±0.2V
1.Power supply 1.power voltage DC 6V
1.TX High. Turn to CH15 in
manual adjust mode and press
2.Transmit VCO
PTT.
lock voltage
2.TX Low. Turn to CH14 in manual
adjust mode and press PTT.
Digital Voltmeter
>0.8V
CV
1.RX High. Turn to CH15 in
3. Receive
manual adjust mode.
VCO lock
voltage
Specification
Condition
TC2
2.6V±0.2V
2.RX Low. Turn to CH14 in
>0.8V
manual adjust mode.
- 2216
-
/Remarks
TC-500 Adjustment Description
RECEIVER: (Enter the manual adjust mode)
Measurement
Adjustment
Specification
Item
Condition
Test
Terminal
Part
/Remarks
Method
Instrument
Adjust the waveform to the
top, and the top is flat, the
1.RX Center. Turn to
TC3
bandwidth is about 20MHz,
TC4
the sign of RX central
TC5
frequency is at the middle
4. Band Pass
CH13 in manual adjust
Scanner
ANT . TP2
Filter
mode.
of the waveform.
1.RX Center. Turn to
CH13 in manual adjust
mode (long press MONI
key to switch N/W).
2. RX Low. Turn to CH14
in manual adjust mode
5.sensitivity
(long press MONI key to
switch N/W).
3.RX High. Turn to CH15
Radio
Communicati
on Test Set
-118dBm
MOD:1KHz ANT
(Wide)
Check
higher
Jack
±1.5kHz
(Narrow)
in manual adjust mode
(long press MONI key to
SINAD: 12dB or
DEV:±3kHz Speaker
FILER:
0.3-3.4kHz
switch N/W).
Radio
1.RX Center. Turn to
Communic-
CH2 in manual adjust
ation Test
mode. Adjust by
Level 9
Adjust squelch
Adjust to just close the
level 9
Set
squelch.
pressing PTT or MONI. SSG output:
-117dBm
6.Squelch
ANT
Speaker
Radio
2.RX Center. Turn to
Communic-
CH3 in manual adjust
ation Test
mode. Adjust by
Jack
Level
3
Adjust squelch
Adjust to just close the
level 3
Set
squelch.
pressing PTT or MONI. SSG output:
-125dBm
- 2317
-
TC-500 Adjustment Description
Transmitter
Measurement
Adjustment
Specification
Item
Condition
Test
Terminal Parts
Method
/Remarks
equipment
7.Transmit
frequency
8.Max.
Deviation
1. TX Center. Turn to CH13 in
manual adjust mode and press
Radio Communication
Test Set
PTT.
1. TX Center. Turn to CH13 in
Radio Communication
manual adjust mode and press
Test Set
ANT
LPF:
switch N/W).
AF:1kHz 120mV
Adjust it to center
Error
frequency
≤±250Hz
Adjust deviation to:
ANT
PTT (long press MONI key to
TC6
15kHz MIC Jack
4.0kHz±200Hz (Wide)
VR2
Check 2.0kHz±200Hz
(narrow)
Radio Communication
1. TX Center. Turn to CH13 in
9. Modulation manual adjust mode and press
Sensitivity
Test Set
FILTER:
ANT
PTT (long press MONI key to
FILER:
MIC Jack
switch N/W).
0.3-3.4kHz
Check deviation:
3.0kHz(Wide)
1.5 kHz(narrow)
AF:1kHz 12±2mV
1. TX Center. CTCSS: 67.0Hz.
67.0Hz
Turn to CH4 in manual adjust
mode.
10. CTCSS
Balance
Adjust VR3, deviation
Radio Communication
Test Set
ANT
tested on condition 1 and
VR3
condition 2 are consistent,
2. TX Center. CTCSS: 250.3Hz. LPF:300Hz
Turn to CH16 in manual adjust
the difference≤200Hz
1. TX Center. Turn to CH4 (wide)
Deviation
Adjust deviation to:
and CH4 (narrow) in manual
0.65kHz±100Hz(Wide)
adjust mode. Adjust by pressing
0.4kHz±100Hz(Narrow)
PTT or MONI.
Radio Communication
1. TX Center. Turn to CH5 (wide) Test Set LPF:300Hz
12. CDCSS
Deviation
ANT
Adjust deviation to:
and CH7 (narrow) in manual
0.65kHz±100Hz(Wide)
adjust mode. Adjust by pressing
0.4kHz±100Hz(Narrow)
PTT or MONI.
1. TX Center. Turn to CH13 in
13. High/low
manual adjust mode and press
Power
PTT (long press MONI key to
Radio Communication
Test Set
switch N/W).
14.
Low Battery
Alert Level
ANT
Power
Check:
Supply:
Low: 1.6—2.5W
6V
High: above 3.5W
1. Turn to CH1 in manual adjust
mode. Adjust the power supply
250.3Hz
CTCSS
mode and press PTT.
11. CTCSS
CTCSS
Adjust the level to make
Digital Voltmeter
LED just flash.
voltage at 5.3V. Adjust by
pressing PTT or MONI.
- 24 -
TC-500 Adjustment Description
Note: In manual adjust mode, when channel selector knob is positioned at channel 1-channel16, MIC jack can’t connect with external cables. After
adjustment is completed, short out the two SELF points and then turn the power on, the radio enters model set mode. Then press PTT to disable the
manual adjust mode.
- 24 -
TC-500 Disassembly and Assembly
Disassembly and Assembly
Remove the Battery
1.
2.
3.
Turn the radio off.
Slide the battery latches upwards.
Pull the top part of the battery away from the radio’s body and lift the battery from the radio.
(See figure 1)
Figure 1
Disassemble main unit (aluminum chassis and PCB)
1.
2.
3.
4.
Remove the two screws at the base of the chassis.
Pull the volume knob and selector knob off.
Remove the antenna at top of the radio.
Remove the screw of the microphone jack cover and pull the jack cover off. (See figure 2)
Scr ew
Scr ew
Jack Cover
Vol ume Knob
Channel
Sel ect or Knob
Figure 2
- 25 -
TC-500 Disassembly and Assembly
Pull the chassis upwards and then pull the chassis away from the front cover. (See figure 3)
Figure 3
The disassembly is shown as the figure 4.
Figure 4
Disassemble PTT button
Push the PTT button in indicated direction until out of the cover. (See figure 5)
Figure 5
- 26 -
TC-500 Disassembly and Assembly
Assemble PTT button
Paste double-coated tape to the cover. And then press the PTT button into the corresponding opening in
the cover. (See figure 6)
Figure 6
Attach the battery
1. Fit the extensions at the bottom of the battery into the slots on the radio chassis.
2. Press the top part of the battery towards the radio until a click is heard. (See figure 7)
Figure 7
- 27 -
TC-500 Exploded View
Exploded View
2
3
3
1
- 28 -
TC-500 Part List 2
Part List 2
Part List 2
No. P/N
Description
Qty.
A 14042563
TC500 Mic cover screw 2.5×6mm
1.00
B 14062041
PTS2.0×4 Screw (cross) (low-carbon steel, color zinc plated)
11.00
C 14052009
Machine screw M2×9 (color zinc)
2.00
D 14066082
Machine screw, cross pan head PMS2.5*4 carbon steel, color zinc plated
2.00
E 14042550
Machine screw 2.5X5 (T9 cross recess head)
2.00
1 1704412A
TC-500 Mic net
1.00
2 1604210B
TC-500 PTT key
1.00
3 1504013E
TC-500 Front case (main unit) (ABS)
1.00
4 14013110
TC2088-311A Liner (knob)
2.00
5 1509106E
TC368S Channel selector knob
1.00
6 1509107E
TC368S Volumn knob
1.00
7 13090020
Speaker 4Ω 0.5W (036S23)
1.00
8 17064021
TC370 Insulating mat (speaker) φ17*1
1.00
9 19060020
278.378 PTT switch SKHLLBA010
2.00
10 19090020
368 Channel switch RY-6933
1.00
11 1404320A
TC-500 Nut (encoder)
1.00
12 14066300
278.378 Nut (switch)
1.00
13 1905002B
1688 Switch (volumn)
1.00
14 1504111A
TC2100 Positive connector bracket (black)
1.00
15 1604214A
TC-500 Battery contact pad
2.00
16 1404327A
TC-500 Battery positive terminal
1.00
17 1704401A
TC2100 Water-proof sponge (positive terminal)
1.00
18 1604215B
TC-500US Water-proof ring
1.00
19 1604211A
TC-500 Heat sinking pad
1.00
20 1404317D
TC-500 Aluminun chasis
1.00
21 14093102
368S Antenna pedestal (main unit) (SMA-B01)
1.00
22 1504014B
TC-500 Rear cover
1.00
23 1404326A
TC-500 Latch spring
1.00
24 15040104
TC2108 Battery latch (PC+ABS)
1.00
25 1704407B
TC-500 Water-proof PVC sheet (battery)
1.00
26 1404308B
TC2100 Negative terminal (battery)
1.00
27 1704414A
TC-500 PVC Water-proof cushion
2.00
28 08021050
MIC JACK ISJ-2584-001
1.00
29 08021060
PHONE JACK 2SJ-2435-001
1.00
30 20020015
Lead 0.5×60 red
1.00
- 29 -
TC-500 Part List 2
31 2003560B
Connection cable ASTVR1 0.35×60MM black
1.00
32 13090011
Mic rubber CZII-64AP
1.00
33 16092020
Cushion (Mic rubber)
1.00
34 1611404A
TC-500 Speaker net (non-woven fabric)
1.00
35 1504017A
TC-500 Mic cover
1.00
36 15111090
TC3000 Light guide
1.00
37 1409001A
TC368 Battery charging connector
3.00
38 14093162
Planar washer
1.00
39 15091042
368 Belt clip (PC+ABS)
1.00
40 1404506C
TC600 Belt clip sring (stainless steel) φ1.0mm
1.00
41 14093170
Shaft
1.00
42 1404505B
TC-600 Belt clip shrapnel (stainless steel) 0.5mm
1.00
43 1404508A
TC-600 Belt clip hardware bracket
1.00
44 1504015G
TC-500 Battery front cover
1.00
45 1904017A
1100mAh Ni-MH*5 battery cell (TC-500)
1.00
46 1504016C
TC-500 Battery bottom cover
1.00
47 1409311B
TC368 Battery positive/negtive pole piece (stainless steel)
2.00
48 1704409B
TC-500 Battery sponge cushion 12.5x10x6.0mm
2.00
- 29 -
TC-500 Packing
Packing
Antenna
Battery Pack
Strap
Charger
Belt Clip
Main Unit
Adapter
O wn
er`s
M an
ua l
Owner`s Manual
Gift Box
- 30 -
TC-500 Specifications
Specifications
400 MHz ~420 MHz
Frequency range
450 MHz ~470 MHz
136 MHz ~150 MHz
150 MHz ~174 MHz
Channel capacity (simplex)
16
Channel spacing
25KHz(wide)/12.5KHz(narrow)
Antenna impedance
50Ω
Microphone impedance
2KΩ
Operation voltage
6V DC
Frequency stability
±2.5×10
-6
Transmitter
-6
Carrier frequency error
±2.5×10
Carrier output power
4.0W (Hi)/2.0W(Lo)
Modulation sensitivity
12±2mV
Modulation distortion
≤5%
Modulation limiting
≤5KHz(wide)/2.5KHz(narrow)
Bandwidth
≤16 KHz(wide)/8.5KHz(narrow)
Audio response
From 6 dB/oct. Pre-Emphasis ±3dB
Conducted spurious emission ≤7.5µW
Adjacent channel power
≤-65 d B
Receiver
Reference sensitivity
Unsquelch sensitivity
≤0.25µV(wide)/0.35uV(narrow)
≤0.4µV
Audio power
400mW (4Ω)
Audio distortion
≤5%
Modulation acceptance
≥│±7 KHz│(wide)/ │±3.5KHz│(narrow)
Audio response
From 6 dB/oct. De-Emphasis +2dB
Co-channel rejection
≥-8 d B
Blocking
≥85d B
Adjacent channel selectivity ≥60 d B(wide)/50dB(narrow)
Spurious response rejection ≥60 d B
Intermodulation rejection
≥60 d B(wide)/50dB(narrow)
- 35 -
-8dB
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