LG LAC2900N Service Manual page 11

2A
Hearing the Pop Noise?
YES
Checked the
Mute Contorl?
YES
Checked the
AF mute?
YES
OK
2B
No output Beep sound?
YES
Checked the
Beep Control?
YES
OK
NO
IC402(14,15,23,32), IC802(15)
IC801(22), Q601, Q602, Q603, Q604,Q605,
Q606, Q607, Q608, Q609, Q610
NO
NO
2-4
TU201(8), IC402(7)
IC402(80), IC802(14)