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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. 
 

        

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 +    

 

 

Summary of Contents for T6500

Page 1: ...r TX mode 2 Check TP503 to provide 0 7 2 3VDC 3 Adjust L509 to provide 2 2 0 1VDC 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 ...

Page 2: ... 0 2mV 1KHz at TP116 13 Unit start to transmit 14 Set AF level at 2 7 0 2mV 1KHz at TP116 15 Unit stop transmit 12 IVOX Detector 1 Set VOX level at 1 2 Set AF level at 14 2 0 2 mV 1KHz at TP116 3 Unit start to transmit 4 Set AF level at 10 8 0 2mV 1KHz at TP116 5 Unit stop transmit 6 Set VOX level at 2 7 Set AF level at 8 4 0 2mV 1KHz at TP116 8 Unit start to transmit 9 Set AF level at 5 8 0 2mV 1...

Page 3: ... output 100mV 5mV at TP117 c Vary the audio frequency from 300Hz to 3KHz d Check the RX response compare to 1KHz tone i 500Hz 5 0 dB to 14 0 dB ii 2 5KHz 12 0 dB to 20 0 dB 10 Maximum and Minimum Audio Output Power a Set SG RF level to 50dBm with 1 5kHz deviation at 1KHz audio frequency b Rotate the volume switch to the position which give a maximum output c Check the voltage at TP117 1500mV d Set...

Page 4: ...et CH15 CODE99 and SG to 60dBm with 503 Octal Code tone frequency 400Hz deviation 2 Check the Pin22 of IC101 to have square wave and low for RF modulation off 3 Repeat item 1 and 2 for code39 023 Octal Code 4 Repeat item 1 3 for CH14 17 Quiet Noise Dectect 1 Set unit to quiet noise mode 2 Set CH15 CODE1and SG to 60dBm with 67Hz tone frequency 400Hz deviation and 55 Hz audio frequency 1K deviation ...

Page 5: ...rent Consumption 1 Set A METER With volume switch OFF check the OFF current 30 A 2 With volume switch ON check the standby current 45mA Press PTT switches and check the TX current 500mA 2 TX Frequency 1 Check CH15 462 5500MHz 500Hz 2 Check CH14 467 7125MHz 500Hz 3 Noise Detector 1 Set the distance between antennas of SG and checked unit to 0 3M 0 5M 2 The antennas of SG and checked unit should be ...

Page 6: ...dio frequency b Rotate the volume switch to the position which give an output 100mV 5mV voltage difference of dummy speaker c Vary the audio frequency from 300Hz to 3KHz d Check the RX response compare to 1KHz tone i 500Hz 5 0 dB to 14 0 dB ii 2 5KHz 12 0 dB to 20 0dB 9 Maximum and Minimum Audio Output Power a Set SG RF level to 60dBm with 1 5kHz deviation at 1KHz audio frequency b Rotate the volu...

Page 7: ...isplay should be clear not miss the segment when pressing and or key the key tone should also be heard clearly 3 Set channel of the sample and production unit CH 11 4 Press PTT switch to intercom between sample and Production unit the LED should be light 5 The sound quality between both should be clear and no metal sound 6 Press CALL key the call tone should be heard clearly each other 7 Change ch...

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