LG LM-M1030A Service Manual page 26

Muting circuit (MUTE)
Dose "Low" appear at
Q602 "B"
YES
Check the "HIGH of"
Q601, Q651 "B"
YES
MUTE
Audio abnormal
Check the output of
IC601 Pin 24, 25
YES
Check the input of
IC601 pin 28, 29, 30, 31, 34,
35, 36, 37
YES
Check the Output of IC601
YES
OK
NO
Refer to IC202 Troubleshooting
(ONLY Q201, Q251)
NO Check the connector of
Q602 "B" & GND
NO
NO
NO
- 2-19 -
Refer to "IC601
Troubleshooting"
Refer to "Muting
Troubleshooting"
Check the 10V(Higher) and
power circuit