Sound Error Correction Flow Chart - LG LAC2900N Service Manual

2. SOUND ERROR CORRECTION FLOW CHART

Something wrong with the Sound?
No sounds of All Functions?
YES
Checked the
E-VR Vdd?
YES
Checked the
E-VR Ground?
YES
Checked the
E-VR Control?
YES
Checked the E-VR
Mute Control?
YES
Checked the E-VR
Signal in/out?
YES
Checked the
Power IC Vdd?
YES
Checked the
Power IC Ground?
YES
Checked the
Power IC Control?
YES
Checked the Power
IC Signal in/out?
YES
Checked
the main connector?
YES
OK
2A 2B
NO
NO
NO
IC802(25,26), IC402(9,10)
NO
NO
IC802(1,2,3,4,5,6,7,9,18,19,20,21,22,23)
NO
NO
NO
IC801(4,22), IC402(22,32)
NO
IC801(3,5,7,9,11,12,14,15,17,19,21,23)
NO
CN302(11,12,13,14,15,16,17,18)
2-3
IC802(24)
IC802(27)
IC802(15), IC402(15)
IC801(23)
IC801(1,2,8,13,18,24)