LG MCV1306 - Digital Audio Amp Check

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ELECTRICAL TROUBLESHOOTING GUIDE
4. DIGITAL AUDIO AMP CHECK
B
Check SMPS.
Check speaker cable connection.
Replace IC602.
Check IC801 & IC501.
Check L701, L702, L704, L705. Check L708, L709, L710. Check L711, L714, L715, L717.
Check IC602.
Replace IC701. Replace IC702. Replace IC703.
Check IC602.
+12 VA, +48 V
Power voltage OK?
IC602
PWM data output signal
OK?
IC602
I2S input signal
OK?
IC701
FL±/FR± input signal
OK?
IC701
SPK_FL±/FR± output
OK?
IC703
RL±/RR± input signal
OK?
IC703
SPK_RL±/RR± output
OK?
IC702
SW1±/SW2± input signal
OK?
IC702
SPK_SW output
OK?
NO
NO NO
NO
NO
NO
NO NO
YES
YES
YES
YES YES YES
YES
YES YES YES
YES
YES
OK