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4.9.2 Speaker Trouble Shooting (Common Path)
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the signal of
CN200 41pin,42Pin
Yes
FCPB and LCD
Connection OK?
Cables of SPK/RCV
are OK?
Speaker is Operated
Yes
Yes
No
SPK_EN Operating
0 Receiver Only
1 MIDI or SPK mode
START(Speaker)
Yes
ABB_SPK_EN signal is low?
Check the signal
Of C216,R217
Yes
U100 Re-solder &
Change
U101 Re-solder &
Change
No
Yes
Check the signal
Of C221,C222
No
U200 Re-solder &
Change
U201 Re-solder &
Change
Re-solder of
FPCB_CN3, CN2
SPK/RCV Re-Solder &
Change
Z3X-BOX.COM
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