Samsung SGH-E360 - Key Backlight Troubleshooting

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Flow Chart of Troubleshooting
7-22
7-10. Key Back Light
U700 pin4 = "H"?
Check the UCP200 related to
"KEY_LED_ON"
END
No
Yes
Yes
Main Key LED does not work
KEY_LED
R709
56
R706
10
R707
56
R712
56
56
R704
LED711
U700
GND
2
GND
6
NC
5
STBY
1
3
VIN
4
VOUT
56
R701
56
LED702
R703
LED703
LED706
LED704
56
R702
56
R710
LED705
LED712
2.2UF
LED710
C701
LED707
LED709
56
R705 R708
10
LED708
LED701
10
R711
VBAT
KEY_LED_ON