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Flow Chart of Troubleshooting and Circuit Diagrams
3-32
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3-1-10. Touch Key
Touch Key does not work
Connect the SOC400
NO
YES
Check the connection of
SOC400
YES
Check the condition to
R816 = 3.1V
YES
END
R816 of U805 is High ?
Binary download again
NO
NO
Resolder or change
U805
Check C817 = 3.1V
Check Touch key signals
(TOUCH_SDA, TOUCH_SCL,
TOUCH_RESET)
Check Contocon FPCB
connected to SOC400
Resolder or change U805
NO
Check Touch key signals pattern
NO
Check TouchKey FPCB connected
status on battery pack
Check Touch key signals pattern