Samsung SGH-E715 Service Manual page 13

SGH-E715 Flow Chart of Troubleshooting and Circuit Diagrams
2. System Initial
Initial Failure
The pin #9 of U100 = 1.8V
and pin #11 of U100=2.8V?
Is the pin #19 of U100
" Low --> High" ?
There is 32.768KHz wave
form at the C324, C325 ?
Is the pin #25 of U100
is High ?
The voltage is "High"
at the C106,C112,C113 ?
LCD Display OK ?
Sound operation OK ?
END
YES
YES
YES
YES
YES
YES
YES
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Check the U100
NO
(If it has some problem,
it has to be replaced.)
Check the U100
NO
(If it has some problem,
it has to be replaced.)
NO
Check the U303
NO
Check the U300
NO
Check the U100
NO
Check the LCD part
NO
Check the Audio part
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