Samsung SGH-N625, Service Manual

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Flow chart of trouble shooting 5-23
5-14 DCS Transmit
Tx On (level : 0)
U602
Pin 8
U602
Pin 3
U609
Pin 4
U608
Pin 8
U610
Pin 5
U610
Pin 9 = 0.5~2.5 V
Resolder
U600
Check
VC1 : H
VC2 : L
Change or Resolder
U602
Resolder
U609, C611
Resolder or Change
C626, R611, R613, R614
Resolder
U610
Resolder
U605, U612
U605
Pin 17, 18, 19, 20
Resolder
OneC(U501)
Check U605
Pin 35, Pin 38
Resolder
U605 (Pin35, 38)
Resolder
U501
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check
Ant. S/W, Control Circuit
Check
U608 : +VBATT
Pin 2 (APC)
OK?
Resolder or Change
U608
Yes
Check +VBATT
or APC Control
No
Yes
At 1150~1185MHz,
Pin 10
At CH 1080MHz,
Pin 23
U612