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Flow chart of Troubleshooting and Circuit Diagram
5-18
5-10 Back Light (for Main & Sub LCD)
Backlight does not work
Select LCD Contrast high level
LCD Contrast high level
in the menu?
CN 200 pin 10 = 3.3V ?
Check the circuit related to
U100
No
Yes
Yes
No
MAIN LCD
SUB LCD
Yes
END
Replace the PBA
CN200 pin 25 = "H" ?
SC600 pin 1 = "H" ?
Check the circuit
related to SC600
No
Yes
No
Do 3LEDs correctly work?
Yes
Check LED1, LED2,
LED3
and R5, R6, R7
No
Replace the LCD module
Yes
END
Replace the PBA
CN200 pin 12 = "H" ?
LCD backlight on ?
Check the circuit
related to d365
No
Yes
No
Yes
Replace EL sheet
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 ...