LG LMV1762SB, Service Manual

Page: 15 / 48

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6
3
4
LLLLLLLLLLLLLLLLLLLLL L
N
N N
N
N
NNNNNNNNNNN
N
N
N N N
N
1 When you push any Key, is
there any beeping sound?
Does the display operate?
No
No
Yes
2 Is the connector connected
to the PCB?
Power Off
Yes
No Reconnect or
repair the
connector.
LLLLLLLLLLLLLLLLLLLLL L
N
N N
N
N
NNNNNNNNNNN
N
N
N N N
N
Is there any beeping sound
in the continuity test between
the power cord and the
connector ?
- Code “L” to Pin1
- Code “N” to Pin3
No
Yes Check PCB
Go to No. 6 of
this flow chart.
Go to No. 6 of
this flow chart.
Is there any beeping sound
in the continuity test between
the ends of the fuse?
Yes
No Replace the
Fuse.
LLLLLLLLLLLLLLLLLLLLL L
N
N N
N
N
NNNNNNNNNNN
N
N
N N N
N
5 Is there any beeping sound
in the continuity test between
the ends of the noise filter?
Yes
No
Replace the
noise filter.
LLLLLLLLLLLLLLLLLLLLL L
N
N
N N
N
NNNNNNNNNNN
N
N N
N N
N
Replace the PCB.
(EBR75341201)