LG HDR676X - Electrical Troubleshooting Guide; Hdr Part; Power Supply on Smps Board

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ELECTRICAL TROUBLESHOOTING GUIDE
HDR PART
Replace the BD101
Replace the F101
(Use the same Fuse)
No 5.3VA
Is the F101 Normal?
Is the TH01 Normal?
Is the Vcc (10V - 17V)
supplied to IC101 Pin6?
Is the BD101 Normal?
Is the D128 normal?
Is there about 2.5V at the
IC103 Pin1?
Is the D121 normal?
Is the D122 Normal?
Is the D125 Normal?
Is the D124 Normal?
Is the D127 Normal?
Is the D126 Normal?
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YESYES
YES
YES
YES
YES
YES
YES
YES
YES
Replace the TH101
Is the D102 normal?
Check or Replace the
D102
Replace the D128
Replace the IC103
Replace the D121
Replace the D122
Replace the D125
Replace the D124
Replace the D127
Replace the D126
1. POWER SUPPLY ON SMPS BOARD
Power Line of I/O PCB
is short