LG MAX221UB Service Manual

2-4
2. SOUND ERROR CORRECTION FLOW CHART
No sounds of All Functions?
Something wrong with the Sound?
OK
YES
IC601(24)
YES
NO
Checked the
E-VR VDD?
IC601(27)
YES
NO
Checked the
E-VR GND?
IC601(25, 26), IC401(31, 32)
YES
NO
Checked the
E-VR control?
IC601(15), IC401(98)
YES
NO
Checked the E-VR
Mute control?
IC601(1, 2, 3, 4, 5, 6, 7, 9,
18, 19, 20, 21, 22, 23)
YES
YES
NO
Checked the E-VR
Signal in/out?
IC804(1, 2, 8, 13, 18, 24)
YES
NO
Checked the
Power IC GND?
IC804(6, 20)
NO
Checked the
Power IC VDD?
IC804(4, 22), IC401(85, 87)
YES
NO
Checked the
Power IC control?
IC804(3, 5, 7, 9, 11, 12, 14,
15, 17, 19, 21, 23)
YES
NO
Checked the Power
IC Signal in/out?
JK801(11, 12, 13, 14, 15, 16, 17, 18)
YES
NO
Checked the
Main connector?
2A 2B 2C

LG MAX221UB Specifications

General

Brand	LG
Model	MAX221UB
Category	Receiver
Language	English