5-19
Flow chart of trouble shooting and Circuit Diagram
5-12 GSM Transmit
Tx On (level : 5)
U304
Pin 2
≥
30 dBm
U304
Pin 7
≥
30 dBm
U312
Pin 1
≥
30 dBm
U312
Pin 1
≥
-10 dBm
U200
Pin 7
≥
0.5 V
Pin 5
≥
2.8 V
Pin 3 = 0.5~2.5 V
Resolder
J301
Check
VC1 : L
VC2 : H
VC3 : L
Change or Resolder
U304
Resolder
U318, C353
Resolder or Change
C698, R335, R364, R366
Resolder
U200, R343
U305
pin 30, 47
U107
≥
-10 dBm
Resolder
U305, U302
U305
Pin 17, 18, 19, 20
≥
40 mV
Resolder
OneC(U108)
Check U305
Pin 38
≥
2.5 V
Pin 35
≤
0.5 V
Resolder
U201 (Pin35, Pin38)
Resolder
U108
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check
Ant. S/W, Control Circuit
Check
U312 : +VBATT
Pin 2 (APC)
OK?
Resolder or
Change U312
Yes
Check +VBATT
or APC Control
No
U200
Pin 6
≥
-10 dBm
Summary of Contents for SGH-A200
Page 2: ...Samsung Electronics Co Ltd Printed in Korea 03 2001 Rev 1 0 GH68 01895A ELECTRONICS ...
Page 12: ...Exploded Views and Parts List 1 9 1 10 Battery Charger BATTERY CHAGER GH44 00177A ...
Page 13: ...PCB Diagrams 2 1 2 PCB Diagrams 2 1 Main Top ...
Page 14: ...PCB Diagrams 2 2 2 1 1 Main RF Top ...
Page 15: ...PCB Diagrams 2 3 2 1 2 Main Base Band Top ...
Page 16: ...PCB Diagrams 2 4 2 2 Main Bottom ...
Page 17: ...2 5 PCB Diagrams 2 2 1 Main RF Bottom ...
Page 18: ...PCB Diagrams 2 6 2 2 2 Main Base Band Bottom ...
Page 46: ...Flow chart of trouble shooting and Circuit Diagram 5 16 RI_LIGHT R706 Q101 3 CN503 KPCB A SSY ...
