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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2. System Initial
The pin #9 of U300 = 1.8V
and pin #11 of U300=2.8V?
Is the pin #19 of U300
" Low --> High" ?
There is 32.768KHz wave
form at the C225, C226 ?
Is the pin #25 of U300
The voltage is "High"
at the C306,C308,C309 ?
Sound operation OK ?
Initial Failure
YES
YES
YES
is High ?
YES
YES
LCD Display OK ?
YES
YES
END
SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce
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Check the U300
(If it has some problem,
NO
it has to be replaced.)
Check the U300
NO
(If it has some problem,
it has to be replaced.)
NO
NO
NO
NO
NO
Check the Audio part
2-2
Check the U201
Check the U200
Check the U300
Check the LCD part
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