LG MAX220UB Service Manual page 14

2A
Hearing the Pop Noise?
YES
Checked the
Mute contorl?
YES
OK
2B [OPTIONAL]
No Sound External AMP?
YES
Checked the
Line Out signal?
YES
Checked the Line Out
AMP Mute control?
YES
Checked the Line Out
AMP signal in/out?
YES
OK
2C
No output Beep sound?
YES
Checked the
Beep control?
YES
OK
NO
IC401(87, 96, 98), IC601(15), IC804(22),
Q601, Q602, Q603, Q604, Q607
NO
IC601(18, 19, 20, 21, 22, 23)
NO
Q601, Q602, Q603, Q604, Q607
NO
NO
2-5
JK601
IC401(30), IC601(14)