Dc-Dc Circuit Diagram - LG DP381B Service Manual

4. DC-DC CIRCUIT DIAGRAM

2
D
BAT_9V
S
G
1 3
CSM2307 R70
R71 2K1% R72
BAT_9V
3.3V C29
L11 FB(1206) L12 47uH
Q20 R73 1000pF
CSM2307 750R R76 680K
1
C33 + CE18 D4
R82 0.1R/1%
0.1uF 220uF/10V SS14
BAT_9V C34 + CE19
0.1uF 100uF/25V
1 F-
2 F+
3 T+
4 T-
5 C/c
6 D/d
7 CD/DVD SW VCC
8 RF
9 A/a R159 10k
10 B/b R158 100k
11 F
12 GND-PD
13 Vc(Vref) R154 10k
1
14 Vcc
15 E Q31
NC 2N3904
16
17 VR-CD
18 VR-DVD
19 CD-LD 1 1 R155 100k
20 MD
21 HFM Q18 Q16
22 NC 2SK3018 2SK3018 VCC
23 DVD-LD FB
24 GND-LD R157 R156 L22
1200X CB1 CB5 + CE27
con3 0 0 100uF/10v
0.1uF 102
GND
24
LD-DVD
23
22
21 AVCC1
20 MDI1 Very Important to
LD-CD
19
reduce Noise
VR_DVD
18
VR_CD
17
16
15 E
14 AVCC1
13 V20 CB48
12 GND 102
F
11
B
10
A CB2
9
8 RFO
7 IOA 0.1uF CB49 102
6 D
5 C
T- L25
4
T+
3
F+ 10uH
2
F-
1
Q25
2SB1132
HEADER 24 SMD0.5 TOP L26 1
1200X 10uH
R99
R100
Q28
2SB1132
1
24 T- MDI1
23 T+
22 F-
21 F+
PD_DVD
20
19 VCC
18 VR
17 GND
16 LD_DVD
15 LD_CD
14 VR
GND
13
12 PD_CD
11 GND
10 VRF
9 C
8 B
7 A
6 D
5 F
4 E
3 VCC
2 Vs
1 GND
HITACHI HOP1200
LGE Internal Use Only
R66 20K
BAT_9V
R67 10K R68 20K
R69 10K
1.2K1%
0R
U4
V1P4
1 34 C30 0.1uF
EN2 BAIS
STBY
C31 68pF 2 33 R74 10K R75 1.2K1%
CT2 MUTE
3 32
COMP2 EN1
R77 15R 4 31 CT1 C32 68pF R78 100R
SW2 CT1
R80 10K R81 680K
5 30
IPK2 COMP1
R83 15R
6 29
PVCC1 SW1
R84 0.1R/1%
7 28
PVCC2 IPK1
F+
8 27
VOFC+ PGND2
F-
9 26
VOFC- PGND1
M5V
M5V R85
10 25
VCC1 PGND
FOSO R86 0R
11 24
VINFC VCC2
TRSO
DMSO R87 10K 12 23 750R
VINSL+ VINTK
FMSO
13 22 R88 0R
GND VINSP
SP+ 14 21 SL-
VOSL+ VOSP-
SP- SL+ BAT_9V
15 20
VOSL- VOSP+
16 19
GND GND
T+ T-
17 18
VOTK+ VOTK-
35 36
GND GND
AM5898N
TROPEN
IOA
J3
DM-520 SLED MOTOR
SL+
1
1
SL-
2
2
2PIN2
C55 2200pF
R98 NC
R101
C 2
S3.3V 150K
1 B C E 3 R106 NC
2SB1132
R107
SP-
R108 1R
SP+
10K
LIMIT
S3.3V
R97
DM-520 SPINDLE MOTOR
47K
1
Q26 LDO2_TO_USB 2
3906/NC 3
CE30 4
1
220uF/6.3V
4.7 S3.3V
4.7
Q27
+ CE31 3906/NC R103 R104
1
47uF/6.3V 10K/NC 10K/NC
LDO1
CE32 CE33
100uF/10V/NC 100uF/10V/NC
D6
PG05GBUSC
BAT_9V
M5V
R151
27K
CT1
Q12
1
3906
1 Q15
3904
R152 R153
51K 6.8K
M5V
R79 3.6K1%
CE23
47uF/6.3V
BAT_9V
CSM2307
1
L13 47uH L14 FB(1206) 5VA
C35
Q21
1000pF D5
SS14 C36 + CE20
0.1uF 220uF/10V
TP5
TP6
A+5V L23 10uH
2
IN
+ CE28
10uF/16V
S3.3V
R94 10K
C49 C50
0.1uF
0.1uF
1 SL+
2 SL-
C53
OPO
0.1uF/NC
OP-
OP+
R102
C56 R105
150K 2200pF
680K
V1P4
J4
4
4
3
3
2
2
1
1
4PIN2
SP-
SP+
LIMIT
GND
DV33
L18 FB
3-33 3-34
C39 C40 C41
0.1uF 0.1uF 0.1uF
OFF-PAGE CONNECTION
5VA
5VA
5VA
5VA
A-5V
A-5V
A+5V
A+5V
C51 3.3V
3.3V
GND
U5
GND
1uF
TPS60400
1 5
TP7 BAT_9V
L24 10uH A-5V
BAT_9V
1
OUT
2 V20
V20
CE29
3 4 V1P4
10uF/16V V1P4
TPS60400
STBY
STBY
TRSO
TRSO
DMSO
DMSO
FOSO
FOSO
FMSO
FMSO
OP+
OP+
OP-
OP-
OPO
OPO
LIMIT
LIMIT
TROPEN
TROPEN
LDO1
LDO1
LDO2_TO_USB
LDO2_TO_USB 5
IOA
IOA
A
A
B
B
C
C
D
D
VCC
5VA E
E
L20 FB M5V F
F
RFO
RFO
MDI1
MDI1
CE25
47uF/6.3V
GND
GND
L21 FB
A+5V
SERVO I/F SERVO I/F
C42
C38 CE26 C48
0.1uF 47uF/6.3V 0.1uF
0.1uF/NC
S3.3V
CE22 C37
47uF/6.3V 0.1uF
Copyright © 2008 LG Electronics. Inc. All right reserved.
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4
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1,5
1,2,5,6
1,2,4,5,6
1,2,4
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5
5
5
5
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1,2,4,5,6
DC-DC
Monday, March 03, 2008
Only for training and service purposes