User Guide

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SGH-E105 Flow Chart of Troubleshooting and Circuit Diagrams
4-2
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2. Initial
Check the signal at the
pin28ofU100is
"High" when the phone
is boot on
Check the pin 22 of
U100 is "High"
Check U100
NO
Check the U700
NO
Check the soldered status of
OSC801, R803, U100
NO
YES
YES
YES
Initial Failure
Check the pin 4 of
OSC801 is around 2.8V
Check and resolder LCD connector CN200
if there is solder bridhe between the pins
END
YES