Sony SLV-M20HF - Video Cassette Recorder User manual

SLV-M20HF
RMT-V250
US Model
Canadian Model
SERVICE MANUAL
VIDEO CASSETTE RECORDER
MICROFILM
S MECHANISM
• Refer to the SERVICE MANUAL of VHS MECHANICAL
ADJUSTMENT for MECHANICAL ADJUSTMENTS.
(9-921-647-11)
G
j
SPECIFICATIONS

SLV-M20HF
4-5
MA-335 (REC/PB AMP) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series —
4-6 4-7
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
MA-335 BOARD
1 IC260 4REC
2 IC260 #º REC
CN261 1REC
3 IC260 @• REC
20mV/Div
0.1µsec/div
0.5V/Div
0.1µsec/div
1V/Div
0.1µsec/div
4 IC260 @™ PB
200mV/Div
0.1µsec/div
5 IC260 !• REC/PB
2.3Vp-p
H
6 IC260 !¶ REC/PB
CN261 3REC/PB
5Vp-p
30Hz
MA-335 BOARD
• For printed wiring boards.
•b: Pattern from the side which enables seeing.
Caution :
Pattern face side: Parts on the pattern face side
(Conductor Side) seen from the pattern face are
indicated.
Pattern face side: parts on the parts face side seen
(Component Side) from the parts face are indicated.
• For schematic diagrams.
• Caution when replacing chip parts.
New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum
capacitor, because it is damaged by the heat.
• All resistor are in ohms, 1/4W unless otherwise noted.
Chip resistor are 1/10W unless otherwise noted.
kΩ: 1000Ω, MΩ: 1000kΩ.
• All capacitors are in µF unless otherwise noted. pF : µ
µF. 50V or less are not indicated except for electrolytics
and tantalums.
•C: panel designation.
• : internal component.
•A: B+ Line.
•B: B– Line.
•J : IN/OUT direction of (+,–) B LINE.
• Circled numbers refer to waveforms.
• Readings are taken with a color-bar signal input.
• Voltagearedc betweenground andmeasurement points.
• Readingsare taken with a digitalmultimeter (DC10MΩ).
• Voltagevariationsmay benoted duetonormal production
tolerances.
When indicating parts by reference number, please
include the board name.
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
REC/PB AMP
MA-335 (1/9)
CJ570 A-3
CN101 C-7
CN102 E-2
CN103 I-4
CN162 J-12
CN163 I-12
CN165 G-11
CN260 B-9
CN261 B-7
CN301 B-4
CN302 B-5
CN341 B-10
CN423 C-12
CN603 H-1
CNJ980 A-2
CNJ981 A-1
D103 F-6
D107 G-8
D109 F-4
D161 J-8
D370 C-10
D379 A-11
D502 C-1
D503 C-2
D504 C-2
D560 B-3
D561 A-10
D611 J-3
D612 J-3
D614 J-3
D702 F-12
D801 D-9
D802 D-9
D980 A-2
D981 A-2
D982 B-1
D983 A-1
D984 A-1
IC100 G-6
IC101 I-3
IC140 H-11
IC141 A-5
IC161 I-9
IC201 D-5
IC202 E-5
IC260 B-8
IC301 B-5
IC340 B-10
IC360 B-11
IC500 C-1
IC501 D-1
IC601 E-12
IC733 H-13
IC871 I-6
IC980 B-1
PH101 H-8
PH102 H-4
Q101 F-1
Q102 F-10
Q103 F-5
Q140 H-10
Q201 C-3
Q204 C-3
Q205 C-3
Q208 D-4
Q209 E-4
Q210 E-5
Q211 D-6
Q214 D-6
Q260 B-7
Q301 C-5
Q331 C-6
Q379 A-11
Q386 A-11
Q387 A-11
Q502 B-2
Q503 B-2
Q505 D-1
Q560 B-3
Q603 J-2
Q604 J-3
Q605 J-4
Q606 J-2
Q731 H-13
Q801 B-8
Q802 E-10
Q803 E-9
Q804 E-9
Q805 E-9
Q806 E-8
Q807 E-8
Q808 E-8
Q809 D-8
Q810 E-8
Q851 C-8
Q852 C-8
Q853 D-8
Q854 D-8
Q855 D-8
Q856 D-8
Q857 D-8
Q871 I-5
Q872 I-5
Q873 I-5
Q874 I-5
Q875 H-5

SLV-M20HF
MA-335 (VIDEO, NORMAL AUDIO) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series —
• See page 4-3 for MA-335 BOARD printed wiring board.
MA-335 BOARD
7 IC201 !∞ PB
CN261 2PB
8 IC201 @º PB
9 IC201 @∞ REC
0.1V/div
0.1µsec/div
200mV/Div 0.1µsec/div
!£ IC201 #• REC/ PB
!∞ IC201 %§ REC
3.579545MHz
550mVp-p
0.5Vp-p
H
!º IC201 @• REC
1Vp-p
H
!¡ IC201 #∞ REC
1Vp-p
H
!™ IC201 #¶ REC/PB
4Vp-p
H
2Vp-p
H
!∞ IC201 %§ PB
3.579545MHz
500mVp-p
!§ IC201 $• REC
IC201 %º REC
0.23Vp-p
H
!§ IC201 $• PB
IC201 %º PB
340mVp-p
H
!¢ IC201 $∞ PB
500mVp-p
H
4-8 4-9 4-10
VIDEO, NORMAL AUDIO
MA-335 (2/9)

SLV-M20HF
MA-335 (SERVO/SYSTEM CONTROL) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series — • See page 4-3 for MA-335 BOARD printed wiring board.

MA-335 BOARD
!¶ IC161 1REC/PB
!• IC161
!ª IC161 $£ REC/PB
3Vp-p
16MHz
5Vp-p
30Hz
@º IC161 &º REC/ PB
@£ IC161 ^• REC/PB
@¢ IC161 ^ª REC/PB
@¡ IC161 &£ REC/PB
@™ IC161 &¢ REC/PB
@∞ IC161 7REC
@§ IC161 ^¶ REC
5Vp-p
360Hz
5Vp-p
360Hz
5Vp-p
1.078kHz
5Vp-p
30Hz
5Vp-p 360Hz
4Vp-p 30Hz
5Vp-p
30Hz
100
4-11 4-12 4-13
SERVO/SYSTEM CONTROL
MA-335 (3/9)

SLV-M20HF
MA-335 (ON SCREEN DISPLAY) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series — • See page 4-3 for MA-335 BOARD printed wiring board.
SLV-M20HF
MA-335 BOARD
@¶ IC501 !º REC/PB
@ª IC500 3, @∞ REC/PB
2Vp-p
H
@• IC500 9REC/PB
503.5kHz
0.65Vp-p 5Vp-p
14.31818MHz
4-15 4-16
ON SCREEN DISPLAY
MA-335 (4/9)

SLV-M20HF
4-17 4-18
MA-335 (DSF) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series — • See page 4-3 for MA-335 BOARD printed wiring board.
#º Q802 #¡ Q810 EPB
0.1V/div
0.1µsec/div
0.2V/div
0.1µsec/div
MA-335
BOARD
BPB
DSF
MA-335 (5/9)

SLV-M20HF
4-19 4-20
AFM AUDIO
MA-335 (6/9)
MA-335 (AFM AUDIO) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series — • See page 4-3 for MA-335 BOARD printed wiring board.

SLV-M20HF
4-21 4-22
TUNER
MA-335 (7/9)
MA-335 (TUNER) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series — • See page 4-3 for MA-335 BOARD printed wiring board.

SLV-M20HF
4-23 4-24
POWER SUPPLY
MA-335 (8/9)
MA-335 (POWER SUPPLY) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series — • See page 4-3 for MA-335 BOARD printed wiring board.

SLV-M20HF
MA-335 (AV-BUS) SCHEMATIC DIAGRAM
— Ref. No.: MA-335 Board; 1,000 Series — • See page 4-3 for MA-335 BOARD printed wiring board.
4-25 4-26
AV-BUS
MA-335 (9/9)

SLV-M20HF
FR-139 (MODE CONTROL) SCHEMATIC DIAGRAM
— Ref. No.: FR-139 Board; 2,000 Series —
4-29 4-30
MODE CONTROL
FR-139

SLV-M20HF
DM-81 (OPERATION SWITCHES) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
— Ref. No.: DM-81 Board; 2,000 Series —
There are few cases that the part printed on this diagram isn’t mounted in this model.
4-31 4-32
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
OPERATION SWITCHES
DM-81
AJ-2 (LINE-2 IN) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
— Ref. No.: AJ-2 Board; 3,000 Series —
There are few cases that the part printed on this diagram isn’t mounted in this model.
/
LINE-2 IN
AJ-2

SLV-M20HF
AN-16 (INNER SMART FILE SENSOR/WRITER), AN-17 (FRONT SMART FILE SENSOR) PRINTED WIRING BOARDSAND SCHEMATIC DIAGRAMS
— Ref. No.: AN-16, AN-17 Board; 3,000 Series — There are few cases that the part printed on this diagram isn’t mounted in this model.
4-33
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
INNER SMART FILE SENSOR/WRITER FRONT SMART FILE SENSOR
AN-16 AN-17
/

SLV-M20HF
4-39 4-40
SMART FILE
MG-21 (1/3)
MG-21 (SMART FILE) SCHEMATIC DIAGRAM
— Ref. No.: MG-21 Board; 3,000 Series —
1 IC002 !∞
2 IC003 #™
MG-21
BOARD
3.3Vp-p
13.56MHz 3Vp-p
16MHz

SLV-M20HF
MG-21 (GUIDE PLUS) (SMART FILE) SCHEMATIC DIAGRAM
— Ref. No.: MG-21 Board; 3,000 Series —
4-41 4-42
GUIDE PLUS
MG-21 (2/3)
5 IC301 ^§ OSCI
3.6Vp-p
4.0MHz
MG-21
BOARD

SLV-M20HF
MG-21 (VIDEO ENCODER) (SMART FILE) SCHEMATIC DIAGRAM
— Ref. No.: MG-21 Board; 3,000 Series —
4-43 4-44
VIDEO ENCODER
MG-21 (3/3)
3 IC502 3H.VCO1
4 IC502 !¡ CHR.VCO1
MG-21
BOARD
0.4Vp-p
4.03MHz 40mVp-p
14.31818MHz

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
pièceportantle numérospécifié.
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
12345678910 11 12
A
B
C
D
E
F
16
SWITCHING REGULATOR
POWER BLOCK SR821