LG SJ2 - Electrical Troubleshooting Guide; Smps Power Circuit

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ELECTRICAL TROUBLESHOOTING GUIDE
1. SMPS POWER CIRCUIT
YES
YES
YES
YES
YES
YES
No 24.7 V
Check IC901, IC902 network, the device
a short circuit will cause no output.
Replace F900 (same fuse).
Replace BD900.
Replace IC901, IC902.
Replace NTC900.
Check or replace IC900.
NO
NO
NO
NO
NO
F900 normal?
BD900 normal?
IC901, IC902 normal?
NTC900 normal?
Is the Vcc (12 V~16 V)
supplied to IC900 pin6?