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Flow Chart of Troubleshooting
3-5
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3-1-2. Initial
The voltage at the C217=1.8V?
Initial Failure
The voltage at the R121
(the pin #k9 of UCP201)
"Low -> High" ?
There is 32.768KHz wave
form at the C126, C128 ?
The voltage at the
C214=2.9V?
LCD Display OK ?
Sound operation OK ?
END
Check the OSC101
Check the UCP201
Check the LCD part
Check the Audio part
YES
NO
NO
NO
YES
YES
YES
YES
NO
NO
NO
YES
Check the UCP201
(If it has some problem,
it has to be replaced.)
Check the UCP201,R121
(If it has some problem,
it has to be replaced.)