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GIANT ELECTRONICS LTD.
Title: Alignment Procedure
Model: T6500
A. PCB LEVEL (Test Condition: under CH15)
NO ITEM
ALIGNMENT
METHOD
REMARK
1.
LCD display
(Should enter test
mode)
1. Press and hold the ‘+’ key and ‘Menu’ key together.
2. Turn on the radio power until a good key chirp is heard,
and the backlight is on for about 500 ms . finally, the
LCD should be display ‘
1
CH
’.
3. Press ‘DOWN’ key , then all LCD segments should be
anticlockwise displayed.
4. Finally, all the LCD segments should be shown for
about 500ms as follows: 2
18
88.
.
2.
Standby current
1. Set A-METER, and RX mode.
2. Check the standby current <45mA DC.
3.
Talk on current
1. Set A-METER, and TX mode @50ohm load.
2. Check the talk on current <900mA DC.
3. Set channel to 14
4. Check the talk on current <500mA DC.
4.
VCO
1. Set RX or TX mode
2. Check TP503 to provide 0.7~2.3VDC .
3. Adjust L509 to provide 2.2
±
0.1
VDC at TP503 if VCO
level are more than 2.4VDC on CH14.
4. Set WX mode, check TP504 to provide 0.7~2.4VDC(for
T5950)
5. TX Power 1. Set TX mode CH15, Check transmit power to provide
<GMRS
2. Set TX mode CH14, Adjust VR503 to provide
<FRS
6.
TX Frequency
1. Set TX mode
2. Adjust VC501 to provide 462.5500MHz
±
50Hz.
7. CTCSS
Tone
Frequency
1. Set CH15/CODE1 and Tx mode.
2. Check CTCSS tone frequency to be within 66.8Hz to
67.2Hz.
8.
CDCSS Frequency
1. Set TX mode
2. Set CH15/CODE99
3. Adjust VR501 to provide 503 Octal Code
4. Set CH15/CODE39, check Octal Code to be 023
FILTER SET:
1.Input Level:
0.9KHz
9.
CTCSS Tone Dev.
1. Set CH15/CODE1
AF input level to off, check DEV to
be 300Hz~ 650Hz.
2. Set CH14/CODE38
AF input level to off, check DEV
to be 300Hz~ 650Hz.
FILTER SET:
1.50HZ~300HZ
2.750
µ
s De-emp
ON
3. PK+
4. FM DEV.
AVG ON
10. TX
Modulation
& distortion
1.Set AF level at 50mv;1KHz,Adjust VR101 to provide
Max TX deviation 2.25KHz to 2.35KHz.
2.Check input Mic level in 5~15 mV to provide normal
deviation 1.5KHz.
3.Check the demodulation distortion <= 5%.
5. Audio Frequency Response.
a) Input a 2.0mV 1KHz audio frequency to TP116
and press ‘PTT’ switch.
b) Check the response compare to 1KHz tone.
i) 500Hz : -5.0 dB to –11.0 dB.
ii) 2.5KHz : +3.0 dB to +9.0 dB .
FILTER SET:
1.HPF 50Hz
2.LPF 15KHz
3. PK +
