LG 32LG4000 (CHASSIS:LD86A) Service Manual ▷ View online
- 21 -
11. DVD doesn’t display
Check Pin 8(DVDP_Y input), Pin 7(DVDP_Pb input)
and Pin 6(DVDP_Pr input) of P1200 wafer.
Can you see the normal waveform?
YES
NO
Check the soldering condition of P1200
Check the input(SW_COMP_Y:R1273,
DVDP_Pr:R1277, DVDP_Pb:R1275) of
DVDP_Pr:R1277, DVDP_Pb:R1275) of
LGE7363(IC100).
Especially you should check the H,V sync and clock.
Can you see the normal waveform?
YES
This board has big problem because Main
chip(LGE7363) have some troubles.
After checking thoroughly all path once again, You
should decide to replace LGE7363 or not.
YES
It may be occurred in the DSS-863 DVD Loader.
You can change other DSS-863 DVD Loader and
You can change other DSS-863 DVD Loader and
check again.
Check the connection P1201 between main B/D and
DSS-863 DVD Loader.
Check the connection P1202 between main B/D and
DSS-863 DVD Loader.
Check the connection P1200 between main B/D and
DSS-863 DVD Loader.
YES
Fix the 4pin cable well on the P1201 and the connection
wafer of DSS-863 DVD Loader.
NO
Fix the 6pin cable well on the P1202 and the connection
wafer of DSS-863 DVD Loader.
Fix the flat cable well on the P1200 and the connection
wafer of DSS-863 DVD Loader.
NO
YES
YES
NO
If the changed DSS-863 loader is operated well,
before DSS-863 loader have the problem itself.
You might change the new DSS-863 DVD Loader.
YES
- 22 -
BLOCK DIAGRAM
1. MAIN
LV
D
S
SC
2
_
L
/
R
_
IN
L
G
E
7363
(I
C
1
0
0
)
S
TMAV
3
4
0
(I
C
7
0
0
)
N
T
P
3
000A
(I
C
100
0)
SP
(
R
)
SP
(
L
)
SP
(
R
)
SP
(
L
)
P
1001
5
V
_A
N
T
_M
N
T
PC
M
C
IA
(P
800)
EEP
R
O
M
K
IA
7427F
(I
C
104)
EEP
R
O
M
(I
C
105)
I2
C_
D_
T
U
/
I2
C_
A
_
T
U
P
404,
P
405
TV Tuner
TV Tuner
B
OOS
T
E
R
SI
F
TV
_
C
V
B
S
SC
1
_
R
/
G
/
B
DS
U
B
_
R
/
G
/
B
R/
G
/
B
D
S
U
B
_H
/
V
_S
Y
N
C
M
A
X
3232C
D
R
(I
C
702)
D
E
B
U
G
_
U
A
RT
-T
x
/
Rx
HD
M
I S
/
W
(I
C
902
)
EEP
RO
M
HDM
I_
I2
C
HDM
I_
I2
C
_
0
HDM
I_
C
E
C
HDM
I_
R
x
TM
D
S
HP
D
HP
D
HDM
I_
C
E
C
US
B
_
D
M
/
D
P
5
V
_
HDM
I
PCM_ADD
PCM_DATA
TS_Parallel
TU
_
T
S
_
D
A
TA
KI
C
7
SZ
3
2
F
U
(I
C
802)
PCM_CD_ON
CI_
C
D_
1
/
2
I2
S
, I2
C
MU
T
E
SC
1
_
C
V
B
S
_
IN
SC
2
_
C
V
B
S
_
IN
SC
1
_
TV
_
V
O
U
T
D
T
V/
M
N
T
_
V_
O
U
T
SC
1
_
L
/
R
_
IN
T
V
_L
/
R
_O
U
T
DT
V
/
M
N
T
_
L
/
R
_
O
U
T
RES
E
T
I2
C
TS_Serial
74
L
V
C
5
41
A
(I
C
800)
L
E
D
_
B
/
R
&
IR
, K
E
Y
1
/
2
/
3
TO
D
V
D
PA
G
E
EA
R_
L
/
R
_
O
U
T
AM
P
(I
C
1002)
J
K
100
1
JK
6
0
0
JK
6
0
1
JK
7
0
3
JK
7
0
0
JK
7
0
4
SI
D
E
_
C
V
B
S_
IN
, SI
D
E
_
L
/
R
_
IN
S
ID
E
_Y
/
C
_I
N
JK
6
1
8
- 23 -
LGE7363
(IC100)
COMP_Y/Pb/Pr
COMP_L/R_IN
Switch
(IC1203)
Switch
(IC1207)
Switch
(IC1204)
Audio Switch
(IC1205,IC1206)
Component Switch
(IC1200)
To DVD deck
(P1201)
PC_L/R_IN
DVDP_Y/
Pb
/Pr
DVDP_L/R_IN
DVDP_Rx
DVDP_Tx
DVDP_SPDIF
DDC/UART-
Tx
DDC/UART-Rx
SPDIF_OUT
DEBUG_UART_Tx
To previous page.
DEBUG_UART_Rx
from previous page.
SPDIF_SW_OUT
SW_COMP_Y/
Pb
/Pr
PC_COMP_DVDP_L/R
To DVD deck
(P1200)
JK1000
JK701
JK702
2. DVD
- 24 -
EXPLODED VIEW
300
200
121
120
122
123
500
510
800
804
801
803
805
802
806
822
521
821
540
820
530
531
400
900
910
550
560
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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