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Flow Chart of Troubleshooting
3-4
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3-1-2. Initial
Initial Failure
The pin #A6 of U101 =
1.8V and
the pin #D6 of U101 =
2.8V ?
Check the
U100
(if it has some problem, it is to be replaced.)
Yes
No
Is the pin #P5 of U100
"Low
→
High" ?
Yes
No
Check the
U100
(if it has some problem, it is to be replaced.)
There is 32.768kHz wave
forms at the C106 and
C105
Yes
No
The voltage is "High" at
the C120,C121,C122
LCD display is O.K?
No
Yes
Yes
Yes
Check the LCD part
No
Sound is O.K?
Yes
No
Check the Audio part
END
Yes
①
①
Check the
U100
①
Check the
U100
①