Sound Error Correction Flow Chart - LG MAX220UB 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 GND?
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 GND?
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
IC601(25, 26), IC401(31, 32)
NO
NO
IC601(1, 2, 3, 4, 5, 6, 7, 9,
NO
NO
IC804(1, 2, 8, 13, 18, 24)
NO
IC804(4, 22), IC401(85, 87)
NO
IC804(3, 5, 7, 9, 11, 12, 14,
NO
JK801(11, 12, 13, 14, 15, 16, 17, 18)
2-4
2C
IC601(24)
IC601(27)
IC601(15), IC401(98)
18, 19, 20, 21, 22, 23)
IC804(6, 20)
15, 17, 19, 21, 23)