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SGH-X140 Flow Chart of Troubleshooting
2-
4
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2-1-2. Initial
Initial Failure
The pin #G11 of U101 =
1.8V and
the pin #J12 of U101 =
2.8V ?
Check the U101
(if it has some problem, it is to be replaced.)
Yes
No
Is the pin #K9 of U101
"Low
→
High" ?
Yes
No
Check the U101
(if it has some problem, it is to be replaced.)
There is 32.768kHz wave
forms at the C220 and
C221
Yes
No
Check the U201
Is the pin #A4 of U101
is "High"
The voltage is "High" at
the C112,C115,C116
Check the U101
Check the U404
LCD display is O.K
No
No
Yes
Yes
Yes
Check the LCD part
No
Sound is O.K
Yes
No
Check the Audio part
END
Yes