Sony DSR-250 Service Manual page 103

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