LG FE-286E - Page 17

- 2-10 -
Audio abnormal
Check the output of
IC701 Pin 26, 27
Refer to “IC701
Troubleshooting”
Refer to “Muting
Troubleshooting”
Check the “High” of IC702 Pin 5.
Check the Voltage of IC702 Pin 7.
Check the power circuit.
Check the input of
IC702 Pin 2,4 (L-CH/R-CH)
Check the Output of IC702
Pin 12, 8 (L-CH/R-CH)
END
YES
YES
YES
NO
NO
NO
Muting circuit (MUTE)
Dose “High” appear at
Q712 “E”
check the “High”
Q721, Q771, “B”
MUTE
Check the “High” of Q712 “C”
Replace the TR
YES
YES
NO