Giant Electronics T6500 Alignment Procedure

GIANT ELECTRONICS LTD.
Title: Alignment Procedure
Model: T6500
A. PCB LEVEL (Test Condition: under CH15)
NO ITEM
1. LCD display
(Should enter test
mode)
2. Standby current
3. Talk on current
4. VCO
5. TX Power
6. TX Frequency
7. CTCSS Tone
Frequency
8. CDCSS Frequency
9. CTCSS Tone Dev.
10. TX Modulation
& distortion
THE CONTENT OF THIS DOCUMENT IS GIANT ELCT.LTD. INTELLECTUAL PROPERTY AND IS THE
PROPERTY OF GIANT, IT IS TO BE TREATED AS STRICTLY AND IS NOT BE DISCLOSED,
REPRODUCED, OR USED EXCEPT AS AUTHORIZED IN WRITING BY GIANT ELECTRONIC LTD. IN
CONNECTION WITH THE MANUFACTURE,MAINTENANCE AND USE OF THE GIANT EQUIPMENT
WHICH IT PERTAINS. COPYRIGHT @GIANT ELECT. LTD, ALL RIGHTS RESERVED.
ALIGNMENT METHOD
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
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: 218
1. Set A-METER, and RX mode.
2. Check the standby current <45mA DC.
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.
1. Set RX or TX mode
2. Check TP503 to provide 0.7~2.3VDC .
3. Adjust L509 to provide 2.2
level are more than 2.4VDC on CH14.
4. Set WX mode, check TP504 to provide 0.7~2.4VDC(for
T5950)
1. Set TX mode CH15, Check transmit power to provide
<GMRS
2. Set TX mode CH14, Adjust VR503 to provide <FRS
1. Set TX mode
2. Adjust VC501 to provide 462.5500MHz
1. Set CH15/CODE1 and Tx mode.
2. Check CTCSS tone frequency to be within 66.8Hz to
67.2Hz.
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
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.
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 .
CH
'.
88.
.
VDC at TP503 if VCO
± 0.1
50Hz.
±
REMARK
FILTER SET:
1.Input Level:
0.9KHz
FILTER SET:
1.50HZ~300HZ
2.750µs De-emp
ON
3. PK+
4. FM DEV.
AVG ON
FILTER SET:
1.HPF 50Hz
2.LPF 15KHz
3. PK +