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5-20
Flow chart of Troubleshooting and Circuit Diagram
5-13 GSM Transmit
Tx On (level : 5)
U706
Pin 8
°√
30 dBm
U706
Pin 5
°√
30 dBm
U707
Pin 4
°√
30 dBm
U707
Pin 1
°√
0 dBm
Resolder
U708
Check
VC1 : H
VC2 : L
Change or Resolder
U706
Resolder
U700, L707
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Check
Ant. S/W, Control Circuit
Check
U707 : +VBATT
Pin 2 (APC)
OK?
Resolder or
Change U707
Yes
Check +VBATT
or APC Control
No
U602
Pin 1
°√
7 dBm
Resolder or Change
C640, R702, R700, R701, C705
No
Yes
U602
Pin 3
°
¬ 2.5 V
Pin 11
°√
2.8 V
Pin 9 = 0.5~2.5 V
Resolder
U400, U502, U503
U504, U602
U601
pin 30, 47
°√
-10 dBm
Resolder
U501
U601
Pin 17, 18, 19, 20
°√
40 mV
Resolder
OneC(U400)
Check U601
Pin 38
°√
2.5 V
Pin 35
°
¬ 0.5 V
Resolder
U601 (Pin35, Pin38)
Resolder
U400
No
No
No
No
Yes
Yes
Yes
Yes
Summary of Contents for SGH-T100
Page 2: ...Samsung Electronics Co Ltd Printed in Korea 04 2002 Rev 1 0 GH68 02699A ELECTRONICS ...
Page 12: ...1 10 Exploded Views and Parts List 1 10 Battery Charger BATTERY CHARGER GH44 00279A ...
Page 13: ...2 PCB Diagrams 2 1 Main Top PCB Diagrams 2 1 ...