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SGH-E105 Flow Chart of Troubleshooting and Circuit Diagrams
2. Initial
Check the signal at the
"High" when the phone
OSC801 is around 2.8V
Check and resolder LCD connector CN200
if there is solder bridhe between the pins
Initial Failure
NO
pin 28 of U100 is
is boot on
YES
Check the pin 22 of
U100 is "High"
YES
Check the pin 4 of
YES
YES
END
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NO
NO
Check the soldered status of
OSC801, R803, U100
4-2
Check U100
Check the U700
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