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Flow Chart of Troubleshooting
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9-15
9-9. Key Back Light
No
U700 pin3 (KEY_LED_ON)
= "H"?
Check the U700 related to UCP200 pin P13
END
No
Yes
Yes
Main Key LED does not work
U700 pin 1(VDD) = 3.3V ?
Resolder U701, LED701, LED702, R704,
and R705