LG KM710 Service Manual page 79

4. Trouble Shooting
4.9.2 Slide Trouble (ON/OFF)
The all paths connected
Magnetizing into U100?
The DBB(U103) is broken.
Change the board.
LGE Internal Use Only
START
to U100 are OK?
YES
Is the VRIO a 1.8V?
YES
Folder signal is low on
YES
NO
Re-solder the
C102, C103
NO
Refer to Power ON
Trouble
NO
Replace the U100.
The U100 is broken
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