Smps Power Troubleshooting - LG MBD62I Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

10. SMPS POWER TROUBLESHOOTING

No. 5.6VA
YES
Is the F101 Normal?
YES
Is the BD101Normal?
YES
Is the TH101 Normal?
YES
Is Vcc (9V ~ 18V)
supplied to IC101
2PIN?
YES
IS the D959 normal?
YES
Is there about 2.5V
at the IC103 1PIN?
YES
Is the IC102 normal?
YES
Is the D947 Normal?
YES
Is the D949 Normal?
YES
Is the D940 Normal?
YES
Is the D943 Normal?
YES
Is the D941 Normal?
YES
Power Line of Main PCB is short
LGE Internal Use Only
NO
Replace the F101 (Use the same Fuse)
NO
Replace the BD101
NO
Replace the R101
NO
Is the D102 normal?
Check or Replace the D102
NO
Replace the D959
NO
Replace the IC103
NO
Replace the IC102
NO
Replace the D947
NO
Replace the D949
NO
Replace the D940
NO
Replace the D943
NO
Replace the D941
Copyright © 2007 LG Electronics. Inc. All right reserved.
3-10
NO
Only for training and service purposes