Flow Chart Of Troubleshooting - Samsung SPH-A940 Service Manual

7. Flow Chart of TroubleShooting

7-1 Logic Section
7-1-1 Power On
Insert Power
power on
properly?
YES
U203
pin41=high?
YES
C219 =
YES
19.2MHz?
YES
NO
NO
2.7V?
NO
C172
NO
END
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Check Phone power on section
Check CON203 and it's
neighboring circuits
Check
C220,C222,C223,C224,C225,C226
and U203's neighboring circuits
Check OSC302,U107 and it's
neighboring circuits
7-1