Sony SLV-M20HF - Video Cassette Recorder, Service Manual

Page: 58 / 143

SLV-M20HF
4-45 4-46E
POWER BLOCK SR821 (SWITCHING REGULATOR) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
— Ref. No.: SR821 Board; 9,000 Series —
MA-335B
REC/PB AMP, VIDEO, AUDIO,
SERVO/SYSTEM CONTROL,
TUNER
FR-139B
(MODE CONTROL)
DM-81A
(OPERATION SWITCHES)
POWER BLOCK SR821
AJ-2A
(LINE-2 IN)
MG-21
SMART FILE,
GUIDE PLUS
AN-17A
FRONT
SMART FILE
SENSOR
AN-16A
INNER SMART FILE
SENSOR/WRITER
There are few cases that the part printed on this diagram isn’t mounted in this model.
Note :
The components identified by
mark
! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
Note :
Les composants identifiés par
une marque
! sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
L
F101
2A 125V
C101
0.1/250
L101
D107-110
+ +
+
+
+
GND
C105
1500P
125
Q102
C112
0.0047
C111
0.047
PC101
*R109 D104
*R107
C110
0.047
D103
R104
10K
R102
100K
C107
4.7/50
R103
100K
C106
120/200
D106
C109
0.033
400
FB1
D102
R106
33K/3
T101 POWER TRANSFORMER
D201
D202
D204
C202
1000/16
D205
C201
47/50
L202
20uH
C203
220/16
C205
470/10
L203
20uH
C206
47/50
*R207
R206
1.8K
PC101
D206
C208
1/50
+
IC201
SHUNT REG.
Q101,102
SWITCHING
1N4005
EG01
ERA15-02
1SS119
RD3.0ES
PR1003
RD51F
PR1003
S3L20U
D3S4M
2SC4040
ON3131
1N4005
Ref. No min typ max
ON3131
C204
2200/16
AN1431T
TO
MA-335 BOARD
CN603
120VAC
11
10
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
+38
+13
+13
GND
GND
GND
+6V
+6V
POWER BLOCK (SR821)
C104
470P
125
R101
6.8M
1/2
AC IN
D109
D110
D107
D108
D105
Q101
2SC4054
C102
0.1/250
C103
470P/125
H
CN101
R108
22
3
2
1
-30V
-F(0V)
+F(4.5V)
+
C207
470/10
C209
0.01
R208
10
1/2
R201
10 1/2
+
D207
PR1003
R204
0.47
R209
2.7
R205
47
1/2
VR201
500
CN201
(SEE PAGE 4-23)
P1
P2
B1
B2
S5
S4
S3
S1
S6
S8
S7
R107
R109
R207
100/1 120/1 120/1
560
620
680
1.2k 1.5k 2.2k
R210
1.5
0.5W
H
1 2 3 4 5
6 7 8 9 10
11
12
A
B
C
D
E
F
16
SWITCHING REGULATOR
POWER BLOCK SR821