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Main Board Electric Diagram for SD-270: Front end
1
ESD
DSPVCC33
R43
+ EC10
4.7R
47uF/16V
C52
C53
NM
NM
1uF
1uF
Close to CN2
Q2
R44
9012
DSPVCC33
CN2 is used for Sanyo/Sony OPUs
R45
+ EC11
4.7R
47uF/16V
C54
C196
C55
1nF
1nF
1nF
Q3
R46
1
9012
GND-LD
2
DVDLD
LD-DVD
3
NC
4
OPU_HFM
HFM
C56
5
MD
CDLD
1nF
6
LD-CD
VR_DVD
7
VR-DVD
8
VR_CD
VR-CD
9
NC
10
E
11
OPU5V
L2
10uH
VCC
VC1
R48
33R
2.1V
12
VC
13
GND-PD
14
F
28
15
NC
B
16
A
27
17
NC
RF
2
18
CD/DVD
26
19
NC
D
20
C
TACT-
25
21
NC
T-
TACT+
22
T+
23
FACT+
F+
24
FACT-
F-
CN2
SF-HD6B/0.5mm,24P TOP
C58
C57
0.1uF
+ EC13
0.1uF
47uF/16V
FOCUS_S
SLED_S
TRACK_S
SPDL_S
DRVSB
3
CN4
SLED+
SL_MOT+
6
SLED-
SL_MOT-
5
GND
4
HOMESW
3
SP+
2
SP_MOT+
SP-
1
SP_MOT-
NM(SLED & SPINDLE)
DSPVCC33
CN3
C42
0.1uF
LOAD-
LOAD-
1
LOAD+
2
LOAD+
3
OUTSW
4
R92
R90
R91
GND
5
R87
NM [0R]
4.7K
4.7K
4.7K
INSW
R88
0R
NM(TRAY_CNN)
[NM]
HOMESW
C64
C65
C66
NM
NM
NM
[1nF]
[1nF]
[1nF]
4
A
4-4
B
OPU
313A
HD65
502W
R49: 100R
0R
91R
R50: 100R
0R
91R
220R
LD_DVD
R49
100R
VR_CD
MD_DVD
VR_DVD
MD_CD
R50
100R
220R
LD_CD
R47
0R
RFA5V
+ EC12
100uF/16V
RF_E
RFA5V
VC
R52
RF_F
RF_B
3.3K
RF_A
RF
CD_DVD
CD_DVD
RF_D
CD/DVD Control :
RF_C
C195
DVD=LOW
1nF
CD=HIGH
FOCUS_S
SLED_S
TRACK_S
SPDL_S
DRVSB
VC2
SP_MOT+
SP_M-
SL_MOT+
SL_MOT-
FACT-
FACT+
TACT-
TACT+
LOAD-
LOAD+
U7
1
FOCUS_S
VINFC
2
TR_B1
TR_B1
3
REGO2
REGO2
4
SLED_S
VINSL
5
REGO1
REGO1
6
OPEN
FWD
7
CLOSE
REV
29
GND
M5V
8
VCC1
LOAD-
EC14
C62
9
VOTR-
220uF/16V
0.1uF
LOAD+
10
VOTR+
SL_MOT-
11
VOSL+
SL_MOT+
12
VOSL-
FACT-
13
HOMESW
VOFC-
IN_OUT_SW
IN_OUT_SW
INSW
FACT+
14
INSW
VOFC+
B
C
R74
SP_M-
2K
SPDL_SENS-
SPDL_SENS-
D19
DSPVCC33
2
OPU:
313A
HD65
3
R76
R76:
2.2R
1R
1R
1
R75
BAT54C
SP_MOT-
2K
SPDL_SENS+
SPDL_SENS+
Close to motor driver.
DSPVCC33
R84
R86
1K 1%
33K
VC2
R85
C67
C68
1K 1%
0.1uF
0.1uF
AM5888S(HSOP-28)
28
MUTE
DRVSB
VC2
27
D30
BIAS
R66
26
C63
2.2R
VINTK
TRACK_S
100pF
1K
25
TR_B2
TR_B2
24
NC
23
VINLD
SPDL_S
22
GND
30
GND
TR_B1
M5V
Q4
21
VCTL
SS8550D
20
NC
19
VCC2
18
SP_M-
VOLD-
REGO1
SP_MOT+
17
VOLD+
TACT-
16
VOTK-
TACT+
15
VOTK+
C
4-4
D
M5V
D31
Imax=250mA
A
K
6.8R
b
DSPVCC33
b
DSPVCC18
TR_B2
Q5
SS8550D
R70
R72
20k
4.7k
1%
1%
REGO2
R71
R73
12k
10k
1%
1%
GND
GND
D
E
1
C195
A1
C196
A1
C42
A3
C52
A1
C53
A1
C54
A1
C55
A1
C56
A1
C57
A2
C58
A2
C62
B3
C63
C3
C64
A3
C65
A3
C66
A3
2
C67
C2
C68
C2
CN2
A1
CN3
A3
CN4
A3
D19
C1
D30
C3
D31
C3
EC10
A1
EC11
A1
EC12
A1
EC13
A2
EC14
B3
L2
A1
Q2
A1
Q3
A1
Q4
C3
Q5
D3
R43
A1
A1
R44
R45
A1
R46
A1
3
R47
A1
R48
A1
R49
B1
R50
B1
R52
A1
R66
C3
R70
C3
R71
C3
R72
D3
R73
D3
R74
C1
R75
C1
R76
C1
R84
C2
R85
C2
R86
C2
R87
A3
R88
A3
R90
A3
R91
A3
R92
A3
U7
B3
4
E
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