LG DP450G, Service Manual

Page: 34 / 45

3-28 3-27
CIRCUIT DIAGRAMS
1. MPEG CIRCUIT DIAGRAM
RFV18-2
IOA
IR_OUT
XO
STBY
FMO
DVD_KEY1
DVD_KEY3
DVD_KEY2
VCOMO
OEV
LDO1
OP-
RFVDD3
AV
C
M
MA3
IR
_O
U
T
AVDD33
OP+
LIMIT
V20
MA1
TRO
FOO
V1P4
FMO
DMO
FOSO FOSO FOSO FOSO FOSO FOSO
TRSO TRSO TRSO TRSO TRSO TRSO
DMSO DMSO DMSO DMSO DMSO DMSO
FMSO FMSO FMSO FMSO
TRIN
MA0
TXD
R
FO
FS
RXD
MA10
BA1
BA0
D
A
B
C
RAS#
STVL
AA
D
VD
D
CAS#
CKV
OPO
R
FV
18
-1
WE#
AADVDD
MA4
MA11
AP
LL
VD
D
3
MA5
DCLK
V20
DQM1
MA6
MA7
SF_CS
SF_DI
SF_DO
SF_CK
U
R
ST
#
SF
_C
S
SF
_D
O
SF
_D
I
D
AC
VD
D
3
LDO2
TXD
RXD
RFV18-1
RFV18-2
V1P4
C
LDO1
D
LDO2
STBY
E
V1P4
F
RFO
DMSO
TRSO
FOSO
FMSO
IOA
MDI1
OPO
A
LIMIT
V20
OP-
B
SF
_C
K
DQ0 DQ1 DQ2 DQ3
BA1
D
AC
VD
D
3
BA0
DQ4 DQ5
AD
AC
VD
D
D
AC
VD
D
3
D
VD
_K
EY
1
DQ7 DQ6 D
VD
_K
EY
2
D
VD
_K
EY
3
D
Q
M
0
DQ1
5
DQ1
2
DQ1
3
DQ1
0
DQ1
1
DQ8
APLLVDD3
ADACVDD
MA9
MA8
DACVDD3
VC
O
M
O
DQ9
89
L_
G
DQ1
4
F
89
L_
B
D
VD
_S
LE
EP
89
L_
R
E
AL AR ST
H
L
O
EH
V1P4
DVD_KEY1
DVD_KEY2
DVD_KEY3
OP+
CVBS
OPO
XI
C
VB
S
LCD_CTRL
DCLK
DQM[0..1]
Core3.3V
WE#
RAS#
MA[0..11]
CAS#
XO
3.3V
MA2
GND
MDI1
89L_B
89L_G
89L_R
CPH1
DV33
STHL
OEH
OEV
CKV
STVL
DQ[0..15]
AL
AR
FOO
XI
LCD_CTRL
DMO
FG
TRO
RFVDD3
AVDD33
URST# URST
TRIN
DVD_SLEEP
CPH1
DV33 3.3V
3.3V
V18
DV33
V18
DV33
DV33 V18
V18
AVDD33
DV33
RFVDD3
DV33
AVDD33
DV33
AADVDD
V18
RFV18-1
RFV18-2
DV33
ADACVDD
APLLVDD3
DACVDD3
DV33
RFVDD3
RFV18-2
RFV18-1
3.3V
DV33
DV33
V18
IR_OUT 6
DVD_KEY1 7
DVD_KEY3 7
DVD_KEY2 7
VCOMO 7
SF_CS 3
SF_DI 3
SF_CK 3
SF_DO 3
V20 4
V1P4 4
STBY 4
DMSO 4
FOSO 4
TRSO 4
FMSO 4
OPO 4
LIMIT 4
IOA 4
LDO1 4
LDO2 4
A 4
B 4
C 4
D 4
E 4
F 4
RFO 4
MDI1 4
OP- 4
BA1 3
BA0 3
CVBS 5
OP+ 4
GND 3,4,5,6,7
3.3V 3.4,7
89L_B 7
89L_G 7
89L_R 7
CPH1 7
STHL 7
OEH 7
OEV 7
CKV 7
STVL 7
DQ[0..15] 3
LCD_CTRL 5
MA[0..11] 3
RAS# 3
WE# 3
CAS# 3
DCLK 3
DQM[0..1] 3
AR 5
AL 5
DVD_SLEEP 7
CRYSTAL CIRCUIT
RF Reference
RS-232
SERVO I/F
DVD_KEY
IC
LCD
AUDIO INTERFACE
MEMORY
POWER
CONTRL
FLASH
S-FLASH
EMC
EMC
EMC
EMC
EMI
L213
10uH L213
10uH
R228 0 R228 0
L206
FB(50)
L206
FB(50)
C220
10
uF
/1
0V
C220
10
uF
/1
0V
R234 0R/NC R234 0R/NC
C
23
0
0.
1u
F
C
23
0
0.
1u
F
L211
CBV160808A471B
L211
CBV160808A471B
+ CE204
10uF/16V
+ CE204
10uF/16V
1
2
L210 47uH L210 47uH
C255
AVLC18S02003
C255
AVLC18S02003
+
CE213
22uF/16V-NC
+
CE213
22uF/16V-NC
1
2
L219
1K
L219
1K
C229
330pF
C229
330pF
C204
1000pF/NC
C204
1000pF/NC
R214 27K R214 27K
R202 0R R202 0R
+ CE208
100uF/6.3V
+ CE208
100uF/6.3V
1
2
C235
0.1uF
C235
0.1uF
R236
100K
R236
100K
B
C
E
Q202
3904 B
C
E
Q202
3904
1
3
2
C207
0.015uF
C207
0.015uF
R209 0 R209 0
R206 0 R206 0
C251
0.1uF
C251
0.1uF
C206
0.1uF
C206
0.1uF
R205
10
R205
10
L220
10uh
L220
10uh
C210
6800pF
C210
6800pF
C205
0.1uF
C205
0.1uF
R259 0 R259 0
R207 10 R207 10
R230 330 R230 330
+ CE202
100uF/6.3v
+ CE202
100uF/6.3v
1
2
L204
FB(50)
L204
FB(50)
L202
FB(50)
L202
FB(50)
R212 0 R212 0
C241
180pF
C241
180pF
L201
FB(50)
L201
FB(50)
R233
0R/NC
R233
0R/NC
C244
33pF/NC C244
33pF/NC
C209
120pF/NC
C209
120pF/NC
R204
560R 1%
R204
560R 1%
C248
56P
C248
56P
R219
10K
R219
10K
L205
FB(50)
L205
FB(50)
C236
0.1uF
C236
0.1uF
R225
3.3K
R225
3.3K
L214
10uH L214
10uH
+
CE201
100uF/6.3V
+
CE201
100uF/6.3V
1
2
R201 100K R201 100K
C203
0.1uF
C203
0.1uF
R218
10K R218
10K
+ CE207
47uF/6.3v
+ CE207
47uF/6.3v
1
2
L207
FB(1206) L207
FB(1206)
MT1389LP
U201
MT1389L/SMD
LQFP-128
MT1389LP
U201
MT1389L/SMD
LQFP-128
RFA
1
RFB
2
RFC
3
RFD
4
RFE
5
RFF
6
AVDD18_2
7
AVDD33_1
8
XTALI
9
XTALO
10
AGND33
11
V20
12
V14
13
REXT
14
MDI1
15
MDI2
16
LDO1
17
MDILDO2
18
AVDD33_2
19
DMO
20
FMO
21
TRAY_OPEN
22
TRAY_CLOSE
23
TRO
24
FOO
25
PG/GPIO2
26
USB_DP
27
USB_DM
28
VDD33_USB
29
VSS33_USB
30
PAD_VRT
31
VDD18_USB
32
G
P
IO
3/
IN
T#
33
G
P
IO
4
34
G
P
IO
6
35
S
F_
C
S
_
36
S
F_
D
O
37
S
F_
D
I
38
S
F_
C
K
39
U
P
1_
6/
S
C
L
40
U
P
1_
7/
S
D
A
41
IC
E
42
P
R
S
T#
43
IR
44
R
D
0
45
R
D
1
46
R
D
2
47
R
D
3
48
R
D
4
49
D
V
D
D
33
50
R
D
5
51
R
D
6
52
R
D
7
53
D
V
D
D
18
54
D
Q
M
0
55
R
D
15
56
R
D
14
57
R
D
13
58
R
D
12
59
D
V
S
S
33
60
R
D
11
61
R
D
10
62
R
D
9
63
R
D
8
64
VOE/GPIO15 96
VCK/GPIO14 95
VSTU/GPIO13 94
SPDIF/GPIO12 93
HSTR/11 92
LR/GPIO10 91
DVDD18 90
UD/GPIO9 89
VSTD/GPIO8 88
GPIO7/CKE 87
RA3 86
RA2 85
DVDD33 84
RA1 83
RA0 82
RA10 81
BA1 80
DVSS18 79
BA0 78
RAS# 77
CAS# 76
RWE#
75
RA4 74
RA5 73
RA6 72
RA7 71
RA8 70
RA9 69
DVDD33 68
RA11 67
RCLK 66
DQM1 65
H
C
K
/G
P
IO
18
99
H
S
TL
/G
P
IO
17
98
HOE/GPIO1
6
97
R
FH
/O
P
IN
N
12
8
R
FG
/O
P
IN
P
12
7
R
FI
N
/O
P
O
U
T
12
6
R
FI
P
12
5
A
G
N
D
18
12
4
A
V
D
D
18
_1
12
3
A
D
A
C
V
D
D
2
12
2
A
D
A
C
V
D
D
1
12
1
A
L/
G
P
IO
1
12
0
A
V
C
M
11
9
A
R
/G
P
IO
0
11
8
A
D
A
C
V
S
S
11
7
A
P
LL
C
A
P
11
6
A
P
LL
V
D
D
11
5
A
A
D
V
D
D
11
4
A
K
IN
1/
G
P
IO
21
/A
ud
io
_m
ut
e
11
3
A
D
V
C
M
/G
P
IO
20
11
2
A
K
IN
2/
G
P
IO
19
/A
ud
io
_m
ut
e
11
1
A
A
D
V
S
S
11
0
R
10
9
B
10
8
G
10
7
D
A
C
V
D
D
A
10
6
D
A
C
V
D
D
B
10
5
C
V
B
S
10
4
D
A
C
V
S
S
C
10
3
FS
10
2
V
R
E
F
10
1
D
A
C
V
D
D
C
10
0
R223
680
R223
680
C234
0.1uF
C234
0.1uF
D201
1N4148/NC
D201
1N4148/NC
1
2
R203 0R R203 0R
C
21
1
4.
7u
F
C
21
1
4.
7u
F
+ CE211
220uF/6.3v
+ CE211
220uF/6.3v
1
2
C218
0.1uF
C218
0.1uF
B
C
E
Q201
3904
B
C
E
Q201
3904
1
3
2
C239
1uF
C239
1uF
R224
3.3K
R224
3.3K
R268 0 R268 0
SW201
SW212
SW201 SW212
1 4
2 3
C233
6800pF
C233
6800pF
U202
AP1117EL-13
SOT223
U202
AP1117EL-13
SOT223
OUT 2 IN
3
A
D
J
1
TAB 4
R232 0 R232 0
C225
0.1uF
C225
0.1uF
C
20
8
0.
1u
F
C
20
8
0.
1u
F
L209
2.7uH/NC
L209
2.7uH/NC
C227
0.1uF
C227
0.1uF
R221 27K R221 27K
R269
0
R269
0
L215
10uh
L215
10uh
+ CE209
100uF/6.3V
+ CE209
100uF/6.3V
1
2
+ CE203
100uF/6.3v
+ CE203
100uF/6.3v
1
2
C252
0.1uF
C252
0.1uF
C201
0.1uF
C201
0.1uF
C240
56P
C240
56P
C221
0.1uF
C221
0.1uF
C238
0.1uF
C238
0.1uF
C215
0.1uF
C215
0.1uF
C250
18P
C250
18P
C226
0.1uF
C226
0.1uF
C223
0.1uF
C223
0.1uF
C
21
4
22
0p
F
C
21
4
22
0p
F
Y201
27M
Y201
27M
1 2
3
R210 0 R210 0
R235
4.7K
R235
4.7K
R213
100 R
R213
100 R
R229 10K R229 10K
C219
0.1uF
C219
0.1uF
J201
CON4_2.0MM_DIP
J201
CON4_2.0MM_DIP
1
2
3
4
C216
0.1uF
C216
0.1uF
C
22
8
1u
F
C
22
8
1u
F
C224
0.1uF
C224
0.1uF
C213
0.1uF
C213
0.1uF
+ CE212
220uF/6.3v
+ CE212
220uF/6.3v
1
2
L208 47uH/NC L208 47uH/NC
R226
15K
R226
15K
C
22
2
15
00
pF
C
22
2
15
00
pF
C212
27pF
C212
27pF
C202
330pF
C202
330pF
C237
56P
C237
56P
C231
0.1uF
C231
0.1uF
L2
12
FB
(6
00
)
L2
12
FB
(6
00
)
L203 FB(50) L203 FB(50)
R211 15K R211 15K
R216 15K R216 15K
R222 0 R222 0
+ CE205
100uF/6.3V
+ CE205
100uF/6.3V
1
2
R208 0 R208 0
+ CE206
10uF/16V
+ CE206
10uF/16V
1
2
C232
27pF
C232
27pF
R249 2K R249 2K
RN201 10Kx4 RN201 10Kx4
1 8
2 7
3 6
4 5