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SGH-D720 Flow Chart of Troubleshooting and Circuit Diagrams
2-
26
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2-1-11. Bluetooth Part
Enable BlueTooth
NO
Check U605 and change
NO
YES
YES
BT connection disable
END
YES
Check BT function ON
Check VDD_30D is
around 3V
#9pin of U605(C606)
Check 13MHz Clock on
C909
Check "High" signal
on R904
YES
Check OSC901 and
change
NO
Check UCP100
NO
YES
Check the
assembled status of
AN900
Resolder or change
AN900
NO
YES
exchange F900
NO
Check the signal of
F900 at pin2
Check "High" signal
On C910
YES
NO
Check F900 and U900
