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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
ELECTICAL TROUBLESHOOTING GUIDE
SECTION 3. ELECTRICAL
SMPS PART
No .5.6VA
YES
NO
Replace the F901.
(Use the same Fuse)
NO
Replace the BD901.
NO
Replace the R901.
NO
Is the D911 normal?
NO
Replace the D953.
NO
Replace the IC950.
NO
Check or Replace the
D911.
Is the F901
Normal?
YES
NO
Replace the PC901.
YES
NO
Replace the D952.
Is the D952
Normal?
YES
NO
Replace the D955.
Is the D955
Normal?
YES
Power Line of Main
PCB is short.
Is the BD901
Normal?
YES
Is the R901
Normal?
YES
YES
YES
YES
IS the D953
normal?
Is there
about 2.5V at the
IC950 Pin1?
Is the PC901
normal?
Is Vcc
(9V - 18V) supplied
to IC911
Pin5?