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Flow chart of Troubleshooting and Circuit Diagram
5-20
5-12 GSM Receiver
Rx On
RF input : CH center freq. + 67.7 kHz
Amp. : -50 dBm
U704
Pin 8
-60 dBm
U704
Pin 10
-60 dBm
F601
Pin 3,4
-62 dBm
U600
Pin 21, 22
-62 dBm
U600
Pin 1, 2
(100 KHz)
-50 dBm
Check RF connector
-> resolder
Resolder &
U704 Pin 10
-60 dBm
Check
VC1 : L
VC2 : L
Resolder
F601
Resolder
C605, C606, L601
Check
C503 pin 23, 24
(CH-100 KHz) X 2
C510(1080MHz)
-6 dBm
Check circuit
around U503
Resolder
U600
U601
Pin 2, 3, 4, 5
40 mV
Resolder
U601
Resolder
U400
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Summary of Contents for SGH-A800
Page 2: ...Samsung Electronics Co Ltd Printed in Korea 11 2002 Rev 1 0 GH68 03108A ELECTRONICS ...
Page 12: ...1 10 Exploded Views and Parts List 1 10 Battery Charger BATTERY CHARGER GH44 00279A ...
Page 25: ...4 1 Block Diagrams 4 Block Diagrams 4 1 Main Base Band ...
Page 26: ...Block Diagrams 4 2 4 2 Main RF ...