Vdr Part; Electrical Troubleshooting Guide; Power Supply On Smps Board - LG DR165 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY ON SMPS BOARD

No .5.3VA
YES
Is the F101 Normal?
YES
Is the BD101
Normal?
YES
Is the R101 Normal?
YES
Is Vcc (10V - 16V)
supplied to IC101 Pin7?
YES
Is the D121 Normal?
YES
Is there about 2.5V
at the IC103 Pin1?
YES
Is the IC102 Normal?
YES
Is the D124 Normal?
YES
Is the D125 Normal?
YES

VDR PART

NO
Replace the F101
(Use the same Fuse)
NO
Replace the BD101
NO
Replace the R101
NO
Is the D102 normal?
NO
Check or Replace
the D102
NO
Replace the D123
NO
Replace the IC103
NO
Replace the IC102
NO
Replace the D124
NO
Replace the D125
YES
Is the D127 Normal?
YES
Power Line of I/O
PCB is short
3-2
NO
Replace the D127