Ring Indicator - Samsung SGH-A800 Service Manual
Dual band mobile cellular phone
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Also See for SGH-A800:
- Owner's manual (82 pages) ,
- Quick reference card (2 pages) ,
- Service manual (55 pages)
Table of Contents
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5-9 Ring Indicator
Ring Indicator LED
U100 pin 5 = 3.3 V ?
Is Green color LED of 3LEDs
Is Red color LED of 3LEDs
Is Blue color LED of 3LEDs
Flow chart of Troubleshooting and Circuit Diagram
does not work
Yes
correctly work ?
Yes
correctly work ?
Yes
correctly work ?
Yes
END
No
Check the circuit related to U100
No
Check Q4, R14, LED6
No
Check Q3, R12, LED6
No
Check Q2, R13, LED6
5-16
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