LG CE110 Service Manual page 82

4.9.1 Receiver /Speaker Trouble Shooting (Common Path)
No
U100 Re-solder &
Change
No
U101 Re-solder &
Change
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Only for training and service purposes
START(Receiver)
Check the signal
Of L200,L201
Yes
ABB_SPK_EN signal is low?
Yes
Check the signal of
CN200 41pin,42Pin
Yes
FCPB and LCD
Connection OK?
Yes
Cables of SPK/RCV
are OK?
Yes
SPK/RCV is Operated
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4. TROUBLE SHOOTING
SPK_EN Operating
0 Receiver Only
1 MIDI or SPK mode
U201 Re-solder &
Change
Re-solder of
FPCB_CN3, CN2
SPK/RCV Re-Solder &
Change
LGE Internal Use Only