Ring Indicator - Samsung SGH-R200 Service Manual

5-9 Ring Indicator

Ring Indicator LED does not
U102 pin 5
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
3.3V?
Yes
Is Green color of
Yes
Yes
Yes
END
No
Check the circuit related to U102
No
Check Q109,R182,LED1
No
Check Q110,R183,LED1
No
Check Q108,R181,LED2
Flow Chart of Troubleshooting and Circuit Diagrams