Flow chart of trouble shooting and Circuit Diagram
5-18
5-11 GSM Receiver
U304
Pin 2
≥
-65 dBm
Check RF connector
-> resolder
No
Yes
U304
Pin 9
≥
-65 dBm
Resolder &
U304 Pin 9
≥
-65 dBm
Check
VC1 : L
VC2 : L
VC3 : H
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
U603
Pin 7
≥
-70 dBm
Yes
F303
Pin 2
≥
-60 dBm
Yes
U305
Pin 53, 54
≥
-60 dBm
Yes
U305
Pin 49, 50
(225 MHz)
≥
-50 dBm
Check
C301(CH+225MHz)
≥
-20 dBm
C315(1080MHz)
≥
-20 dBm
Yes
Yes
U305
Pin 43, 44
(45 MHz)
≥
-55 dBm
Yes
Yes
Check U305
Pin 32, 33
≥
2.5V
Pin 35
≥
0.5V
Yes
Rx On
RF input : CH center freq. + 67.7 kHz
Amp. : -50 dBm
U305
Pin 24, 25, 26, 27
≥
40 mV
Resolder
U603
Resolder
L613, L635, L639, C659
Resolder
F303, C333
L323, L324
Resolder
U601, C309, C310, C312
C313, C314, C400, R700
Resolder
OneC(U108), U305
Resolder
U305(Pin 35, Pin 32, 33)
Resolder
U108
Resolder
U302
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 ...