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5-23
Flow chart of Troubleshooting and Circuit Diagram
5-15 DCS Transmit
Tx On (level : 0)
U704
Pin 8
25 dBm
U704
Pin 3
25 dBm
U701
Pin 5
25 dBm
U701
Pin 8
0 dBm
U600
Pin 24
10 dBm
Resolder
CON700
Check
VC1 : H
VC2 : L
Change or Resolder
U704
Resolder
U703
Resolder or
C607, R600
U600
pin 12, 13
pin 9, 10
-9 dBm
Resolder U503
U600
Pin 5, 6, 7, 8
40 mV
Resolder
OneC(U400)
Resolder
U600
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check
Ant. S/W, Control Circuit
Check
U701 : +VBATT
Pin 2 (APC)
OK?
Resolder or Change
U701
Yes
Check +VBATT
or APC Control
No
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 ...