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5-12 GSM Transmit
Flow chart of trouble shooting
Tx On (level : 5)
U602
Yes
Pin 2
No
U602
Yes
Pin 7
No
U607
Yes
Pin 4
No
U608
Pin 1
No
U610
Yes
Pin 1
No
U610
No
Yes
At 1080MHz,
No
U612
At CH - 270MHz,
Yes
U605
No
Pin 17, 18, 19, 20
Yes
Check U605
No
Yes
Resolder
U501
Resolder
U600
Check
VC1 : H
VC2 : L
VC3 : L
No
Resolder
U607, C611
Check
Yes
U608 : +VBATT
Pin 2 (APC)
OK?
Resolder of Change
C646, R613,
Resolder or Change
U610
Resolder
U605, U612
Resolder
OneC(U501)
Resolder
U605 (Pin35, 38)
Yes
Change or Resolder
U602
Check
Ant. S/W, Control Circuit
Yes
Resolder or
Change U608
No
Check +VBATT
or APC Control
5-19
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