LG LAS950M - Page 36

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ELECTRICAL TROUBLESHOOTING GUIDE
NO 1.5 V (MPEG & DDR3)
NO 1.2 V (MPEG CORE)
Is 6.2 VA to pin8, 13
of IC300 normal?
Is 6.2 VA to pin8, 13
of IC300 normal?
Check IC304 & 6.2 V power line.
Check IC304 & 6.2 V power line.
YES
YES
YES
YES
YES
YES
NO
NO
Is there H (3.3 V) voltage
to pin6, 15 of IC300?
Is there H (3.3 V) voltage
to pin6, 15 of IC300?
Is switching pulse of
IC300 pin12 normal?
Is switching pulse of
IC300 pin9 normal?
Check R306, R307.
Check R306, R307.
Replace IC300.
Replace IC300.
NO
NO
NO
NO
1.5 V power line is normal.
1.2 V power line is normal.
YES
YES