Hi-Fi Circuit - LG LH-CX640 Series Service Manual

3-14
5.
Hi-Fi CIRCUIT
(A)
No
Sound(EE
Mode)
YES
No
Sound.
Check
the
TU
Audio
of
IC801
Pins1,
3.
Check
the
DVD
Audio
of
IC801
Pins4,
5.
Check the
AV1
Audio
of
IC801
Pins6,
7.
Check the
AV2
Audio
of
IC801
Pins8,
9.
Check the
AV3
Audio
of
IC801
Pins10,
11.
Check the Vcc
of
IC801
Pins34,
40,
IC802
Pin4.
YES
Checkthe
IIC
Clock
and
DATA
at
IC801
Pins42,
43,
IC802 Pins32,
3 3.
YES
Check
the
Audio
of
IC801
Pins16,
17.
YES
Check
the
Audio
of
IC802
Pins22,
26.
YES
Check
the
JK801.
Check
the
IC751
Pins30,
31.
NO
Check
the
DVD
MODULE.
(P8D01
Pins3, 5).
NO
Check
the
Scart1
Jack.
(SC901
Scart1
Audio
in
Pins2, 6).
NO
Check
the
front
Jack.
(PM602
Pins3, 5).
Check
the
Scart2
Jack.
(SC901
S cart2
Audio
in
Pins2, 6).
NO
NO
Checkthe Power 5.2V,
12VT.
YES
NO
Check
the
IC501
Pins59,
60.
NO
Replace
IC801.
Replace
IC802.
NO
NO