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Flow Chart of Troubleshooting
9-3
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9-1-2. Initial
Is the pin #6,#8 of U112
is "High"
Is the #7 of U112 =
1.57V
LCD display is O.K
Yes
Yes
Sound is O.K
END
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③
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Initial Failure
The pin #4 of
U112(HPEIO_1.8V)=
1.8V
Check the
U112, L101 & C134
(if it has some problem, it is to be replaced.)
Yes
No
Is the pin #K9 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 C222 and
C223
Yes
No
Check the
OSC202
Check the
U112, L102 & C133
Check the
U100
No
No
Yes
Check the LCD part
No
Yes
No
Check the Audio part
Yes
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