LG LX-E330A, Manual, Page: 13 / 36

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AUDIO ABNORMAL
Check the signal output of
IC701 pin3, 4.
Check the signal input of IC701
pin8, 12.
Check the DC +10V of
IC601 pin1.
Check the “High” of Q705 “B”.
Check the “High” of
IC701 pin10.
Check the power of IC701.
Check the connecting to
SPEAKER.
YES
YES
YES
NO
NO
NO
MUTING CIRCUIT (MUTE)
Base “High” appear at
Q701, Q751“B”.
check the “Low” of Q701,
Q751, “C”.
MUTE
Check the “High” of PN601 pin19.
Check the “High” of
the IC301 pin2.
Replace the TR.
Refer to IC 301 Troubleshooting.
YES
YES
YES
NO