Ic301 Troubleshooting - LG XA66 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

5. IC301 TROUBLESHOOTING

VFD display check
NO
Check the power supply
to IC301 pin9, 50, 51
YES
Check
IC301 pin1 CS, pin3 STB
pin2, 4 Data
YES
Check IC301 pin7 FOSC
YES
OK
NO
Refer to power troubleshooting
NO
Check CON301 pin7 STB, pin8 Data, pin9 CS
Check IC603 pin91 STB, pin57 Data, pin56 CS
NO
Check or replace R302
3-6
NO