Sony DSR-250, Service Manual

Page: 103 / 322

DSR-250/250P
4-33 4-34
SERVO-2
VI-156 (11/25)
For Schematic Diagram
• Refer to page 4-63 for printed wiring board.
• Refer to page 4-123 for waveforms.
NO MARK:REC/PB MODE
R :REC MODE
P :PB MODE
5.2 0.7
0
3.0
3.0
1.7
1.7
1.4
1.4
1.0
1.0
1.5
1.5
1.0
55
R0/P0.6
0.8
1.9
0.4
0.4
0.4
0.8
6.7
3.0
2.8
1.3
2.8
2.8
2.8
1.4
1.2
1.2
1.2
0 0 2.8 2.8 2.8 0 0.3 2.9 0.3 0 0.6
0.7
5.1
5.1
5.1
5.1
1.6
1.6
1.6
0.5
1.0
2.8
4.4
0.5
1.0
1.0
1.2
R0.9/P0
0
0.6 5.1 0.6 0.6
0
1.0
0
0.5
0 0
56
57
0
0
0.7
1.1
0.6
1.1
2.4
0
1.6
0.6
0
5.2
0
5.2
0
0
1.1
1.6
1.6
2.3
1.0
0.1u
B
C4523
JR4501
16V
TA
1u
C4501
1/10W
1
R4534
JR4503
10k
R4503
4700p
B
C4502
1/10W
0
R4402
JR4505
0.1u
B
C4515
1/10W
1
R4533
0.01u
B
C4508
CXA8062R-EB
IC4500
1
PG_IN
2
GND2
3
PGC
4
PGO
5
PGO2
6
VB2
7
B_IN
8
B_OUT
9
EC_IN
10
EC_OUT
11
YPCI
12
YPCV
13
YCS
14
GND3
15
Vsc_FB
16
Vsc
17
DRUM_Vs
18
SOUT
19
YMU
20
YMV
21
YMW
22
YLU
23
YLV
24
YLW
25
YUU
26
YUV
27
YUW
28
VB3
29
VB1
30
LU1
31
LU2
32
LL1
33
LL2
34
LM_RF
35
GND1
36
REFR
37
RS
38
Vcc1
39
CM_LIMEN
40
CM_LIMOUT
41
DEC1
42
DEC2
43 44
TREEL_-
45
TREEL_FG
46 47
SREEL_-
48
SREEL_FG
49
END_IN
50
END_OUT
51 TOP_IN
52
TOP_OUT
53
DRUM_ON
54 DRUM_CLK
55
DRUM_F/R
56
SU
57 SV
58
SW
59
Vdd
60 FGO
61
Vcc2
62
FGC
63 FG_IN
64 Vref
10uH
L4500
TA8486F(EL)
IC4501
1 U2
2
U
3
DRUM_Cs
4
U1
5
DRUM_Vs
6 W1
7 DRUM_Cs
8 L1
9 LOAD
10 LM_VB
11 UNLOAD
12 UL1 13 UL2
14 UNLOAD
15 LM_Cs
16 LOAD
17 L2
18
W
19 W2
20 DRUM_Vs
21 V1
22 DRUM_Cs
23 V
24 V2
10k
R4504
0.1u
B
C4522
0.1u B
C4401
16V
TA
4.7u
C4525
1/10W
1
R4516
0.1u B C4404
0.1u
B
C4400
0.1u
B
C4524
18P
CN400
1 HW-
2
HW+
3 HV-
4 HV+
5 HU-
6 HU+
7
V
8 V
9 W
10
W
11
HE VCC
12 HE GND
13 U
14
U
15 MR GND
16 FG2
17
FG1
18 FG VCC
0.01u
B
C4510
0.01u
B
C4509
100
R4513
22k
±
0.5%
R4519
0.1u
B
C4521
20V
TA
4.7u
C4405
LB1991V-TLM IC4400
1
Vcc1
2 Vcc2
3 Vs
4
N.C.
5 U OUT
6 RF
7
V OUT
8 RF
9 W OUT
10 VH+
11 VH-
12
ANGLE
13
GND
14 FRC
15 STBY
16
U IN1
17 U IN2
18 V IN1
19
V IN2
20
W IN1
21 W IN2
22
FG IN+
23
FG IN-
24 FG OUT
0.1u
B
C4506
100
R4514
3300
R4511
100k
R4405
0.1u
B
C4519
0
R4506
2P CN501
1 CM_UNLOAD
2 CM_LOAD
B
C4507
0.1u
100
R4512
±
0.5%
470
R4501
XX
R4521
1/10W
1
R4532
120k
± 0.5%
R4520
1/10W
1
R4535
0.1u
B
C4512
0.1u B C4407
0.001u
B
C4504
CM_LIMIT_EVR
LM_LIM_DET
LM_LIM_ON
XREEL_HALL_ON
CM+
0.1u B
C4402
18k
R4403
16V
TA
4.7u
C4511
11P CN500
1 W
2 W
3 V
4 V
5 U
6 U
7 GND
8 GND
9 SENSOR Vcc
10 FG
11 PG
XX
R4510
1k
R4507
20V
TA
4.7u
C4520
± 0.5%
120k
R4522
0.1u
B
C4403
0.1u
B
C4503
10uH
L4400
10k
R4400
10k
R4505
0.1u
B
C4505
1/10W
1
R4515
560p
CH
C4518
22k
±
0.5%
R4518
150k
±
0.5%
R4508
10k
± 0.5%
R4509
20V
TA
4.7u
C4406
DRUM_START
DRUM_FWD
DRUM_FG
DRUM_PG
DRUM_PWM
IC4500_16
REG_GND
DRUM_ON
DRUM_VS
MT_5.2V
CFG_DUTY
D2.8V
CAP_VS
IC4400_VCC
CAP_FWD
CAP_ON
CAP_FG
1
A
CM+
CM_LIMIT_ON
CM_LIMIT_DET
CM-
CM_LIMIT_ON
CM_LIMIT_DET
CM-
CM+
-REF.NO.: 10000 SERIES-
16
XX MARK:NO MOUNT
VI-156 BOARD(11/25)
SERVO-2(CM BLOCK)
M M902
CAM
MOTOR
FG
M
HOLL
SENSOR
CAPSTAN
MOTOR
M903
FG/
PG
M901
M
DRUM
MOTOR
10
G
H
5 13
M
L
6
E
3 8
B
12
D
C
9 2 4 7
J
N
I
17 16
F
K
11 15 14
REC/PB
Drum speed servo
Drum servo (speed and phase)
Capstan speed servo
REC PB
Drum phase servo
SIGNAL PATH
TO(10/25) 288
86
TO(9/25)
103
TO(19/25)
TO(9/25) 9
78
TO(9/25)
94
TO(9/25)
84
TO(9/25)
TO(9/25)
88
TO(10/25) 289
16
TO(25/25)
105 TO(12/25)
TO(25/25)
101
TO(10/25)
290
TO(25/25)
6
DRUM FG/PG AMP,
CAM MOTOR PREDRIVE
IC4500
IC4501
DRUM/CAM
MOTOR DRIVE
IC4400 CAPSTAN MOTOR
CONTROL/DRIVER
Capstan servo (speed and phase)