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MUTING CIRCUIT (MUTE)
Base "High" appear at
Q701, Q751"B".
YES
check the "Low" of Q701,
Q751, "C".
YES
MUTE
AUDIO ABNORMAL
Check the signal output of
IC701 pin3, 4.
YES
Check the connecting to
SPEAKER.
NO
Check the "High" of PN601 pin19.
Check the "High" of
the IC301 pin2.
Refer to IC 301 Troubleshooting.
Replace the TR.
NO
Check the signal input of IC701
pin8, 12.
YES
Check the "High" of
IC701 pin10.
YES
Check the power of IC701.
- 2-9 -
YES
NO
NO
Check the DC +10V of
IC601 pin1.
Check the "High" of Q705 "B".
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