Samsung SGH-E800 Service Manual page 43
Samsung mobile phone service manual
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Also See for SGH-E800:
- Manual (108 pages) ,
- Service manual (50 pages) ,
- Quick reference card (2 pages)
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Flow Chart of Troubleshooting
10. Key Back Light
1) Main Key Part
Main Key Backlight does not work
Yes
No
Check the PMU related to "VDD_KEY"
C430 = "H"?
Yes
END
2) Sub Key Part
Sub Key Backlight does not work
Yes
No
Check the U502 or Replace PBA
U502 PIN46 = "H"?
Yes
No
Change the board to board
CN601 PIN6 = "H"?
FPCB
Yes
No
Check the U600
U600 pin 4 = "H"?
Yes
END
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