Samsung SGH-X105 Service Manual page 12

SG H- X105 F low Chart of Troubleshooting
2. Initial
Initialization Failure
The pin #9 of U100 = 1.8V
the pin #10 of U100 =
Is the pin #19 of
" Low - > H igh" ?
There is 32.768kHz
wave forms at the C320
The pin #25 of U100 is
The Voltage is " H igh"
at the C111,C 118
LC D display is O .K
Sound is O .K
Y es
and
2.825V ?
Y es
U100
Y es
and C 322
Y es
" H igh"
Y es
Y es
Y es
Y es
END
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No
(If it has som e problem, it has to be
No
(If it has som e problem, it has to be
No
Check the U301
No
Check the U200
No
Check the U100
No
C heck the LC D Part
No
C heck the A udio Part
4- 2
C heck the U100
replaced.)
C heck the U100
replaced.)