LG CM9530 - Page 52

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ELECTRICAL TROUBLESHOOTING GUIDE
A
YES
YES
YES
YES
YES
YES
YES
YES
YES
Check IC501.
Check IC600.
Replace IC600.
Check IC700 ~ IC705.
Check Q705 ~ Q708, Q711 ~ Q718.
Check speaker cable connection.
Check IC501.
Check IC206,IC207,IC208.
Check SMPS.
NO
NO
NO
NO
NO
NO
NO
NO
IC501
Pin82, 83, 84 I2S data output
signal OK?
IC600
Pin38,39,40,41,44,45,46,47,48,49
(FR,FL,RR,RL,SW1±)
signal OK?
IC600
PWM data output signal
OK?
Pin13 of
IC700 ~ IC705 Audio signal
OK?
Q705 ~ Q708,
Q711 ~ Q718
OK?
IC501
pin 85 I2S data signal
OK?
IC206,
IC207,IC208 audio signal
OK?
±62 V, -50 V,
-28 V, ±5 V power voltage
OK?
OK