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5-9 Ring Indicator
Ring Indicator LED does not
U621 pin 3
Is Green color of
3 LEDs correctly work?
Is Red color LED of
3 LEDs correctly work?
Is Blue color LED of
3 LEDs correctly work?
5-16
work
3.0V?
Yes
Yes
Yes
Yes
END
SGH-N500 Flow Chart of Troubleshooting and Circuit Diagrams
No
Check the circuit related to U621
No
Check Q408,R727,LED1
No
Check Q407,R726,LED1
No
Check Q406,R728,LED2
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