Sony SLV-L45AR User manual

MICROFILM
SLV-L45AR/L65HFAR/L75HFAR
RMT-V241/V242V
SERVICE MANUAL
JVIDEO CASSETTE RECORDER
Photo : SLV-L75HFAR
Argentina Model
SPECIFICATIONS
N-PALNTSC
Sistema
Formato
VHS PAL-N/NTSC estándar
Cobertura de canales
VHF 2 a 13
UHF 14 a 69
CATVA-8 a A-1, Aa W,
W+1 a W+84
Antena
Terminal de antena de 75 ohmios para VHF/UHF
Entradas/salidas
LINE IN (SLV-L65HFAR)
LINE IN y LINE IN 2 (SLV-L45AR/L75HFAR)
VIDEO IN
Toma fonográfica (1) (SLV-L65HFAR)
Tomas fonográficas (1 por cada) (SLV-L45AR/L75HFAR)
Señal de entrada : 1 Vp-p, 75 ohmios,
desequilibrada, sincronización negativa
AUDIO IN
Tomas fonográficas (2, L/R) (SLV-L65HFAR)
Tomas fonográficas (1 por cada) (SLV-L45AR)
Tomas fonográficas (2 por cada, L/R) (SLV-L75HFAR)
Nivel de entrada : 327 m Vrms,
Impedancia de entrada : superior a
47 kiloohmios
LINE OUT
VIDEO OUT
Toma fonográfica (1)
Señal de Salida : 1 Vp-p, 75 ohmios,
desequilibrada, sincronización negativa
AUDIO OUT
Tomas fonográficas (2, L/R) (SLV-L65HFAR/L75HFAR)
Toma fonográfica (1) (SLV-L45AR)
Salida estándar : 327 m Vrms,
Impedancia de carga : 47 kiloohmios
Impedancia de salida : inferior a
10 kiloohmios
General
Requisitos de alimentación
220 a 240 VCA, 50Hz
Consumo de energía
18 W
Temperatura de funcionamiento
5˚C a 40˚C
Temperatura de almacenamiento
-20˚C a 60˚C
Dimensiones
Aprox. 360 x 97 x 298 mm (an /al / fn)
incluidas las piezas y controles
sobresalientes
Masa
Aprox. 3,7 kg
Accesorios suministrados
Control remoto (1)
Pilas tipo R6 (tamaño AA) (2)
Cable de antena (1)
Cable de audio / video (1)
(sólo el modelo SLV-L65HFAR/L75HFAR)
Cable de alimentación de CA (1)
Diseño y especificaciones sujetos a modificaciones sin previo aviso.
Ver 1.0 1998.07

– 2 –
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer :
4. Look for parts which, though functioning, show obvious
signs of deterioration. Point them out to the customer and
recommend their replacement.
5. Check the B+ voltage to see it is at the values specified.
1. Check the area of your repair for unsoldered or poorly-sol-
dered connections. Check the entire board surface for sol-
der splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly tran-
sistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED
LINEWITH MARK !ONTHE SCHEMATIC DIAGRAMS AND
INTHE PARTS LIST ARE CRITICALTO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÈCURITÉ!
LESCOMPOSANTSIDENTIFIÉSPAR UNE MARQUE!SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTEDES
PIÉCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT.
NE REMPLACER CES COMPOSANTS QUE PAR DES
PIÉCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OUDANS
LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 3 –
1. GENERAL
Paso 1 Conexiones........................................................1-1
Paso 2 Configuración de la videograbadora..................1-2
Paso 3 Ajuste del reloj...................................................1-3
Selección del idioma.....................................................1-3
Instrucciones adicionales de sintonización...................1-3
Reproducción de cintas.................................................1-4
Grabación de programas de televisión..........................1-4
Grabación de programas de televisión con
temporizador.................................................................1-5
Grabación de programas de televisión mediante la
función VCR Plus +......................................................1-6
Reproducción/búsqueda a distintas velocidades...........1-6
Grabación de programas de televisión con el
temporizador instantáneo..............................................1-6
Comprobación/cancelación de ajustes del
temporizador.................................................................1-7
Búsquedas con la función de índice..............................1-7
Grabación de programas estéreo y bilingües................1-7
Edición con otra videograbadora..................................1-7
Ajuste de la imagen.......................................................1-8E
Indice visual..................................................................1-8E
2. DISASSEMBLY
1-1. Removal of Cabinet, Mechanism Unit and Main
Board.....................................................................2-1
Removing the Cabinet Parts..................................2-1
Removing the Mechanism Main Unit and the
CP-1 PWB Assembly.............................................2-1
l-2. Temporarily Setting Up and Connecting
CP-1 PWB Assembly.............................................2-3E
1-3. Installation of the Front Panel................................2-3E
3.DIAGRAMS
Circuit Boards Location................................................3-1
Mechanism Connection Diagram..................................3-2
Overall wiring Diagram (SLV-L45AR).........................3-3
Overall wiring Diagram (SLV-L65HFAR/L75HFAR)...3-5
System Control & Servo Circuit Diagram
(SLV-L45AR)................................................................3-7
System Control & Servo Circuit Diagram
(SLV-L65HFAR/L75HFAR).........................................3-9
Audio & Video Circuit Diagram (SLV-L45AR)...........3-11
Video & Audio Circuit Diagram
(SLV-L65HFAR/L75HFAR).........................................3-13
4.SCHEMATIC DIAGRAMS AND PRINTED
WIRING BOARDS
CP-1 Board (PW-A) Power Supply Circuit Diagram...4-1
CP-1 Board (VA-A) Video, Audio & Tuner
Circuit Diagram (SLV-L45AR).....................................4-3
CP-1 Board (VA-A) Video, Audio & Tuner
Circuit Diagram (SLV-L65HFAR/L75HFAR)..............4-5
Video Circuit Waveforms..............................................4-7
VP-1 Board Video Pre-Amp circuit Diagram
(SLV-L45AR)................................................................4-8
VP-1 Board Video Pre-Amp circuit Diagram
(SLV-L65HFAR/L75HFAR).........................................4-9
A7101 Display (FLD) Grid/Anode Assignment
Drawing & Table...........................................................4-11
TM-1, 2 Boards Operation Key, Display & Timer
Circuit Diagram (SLV-L45AR).....................................4-11
TM-1, 2 Boards Operation Key, Display & Timer
Circuit Diagram (SLV-L65HFAR/L75HFAR)..............4-13
TABLE OF CONTENTS
Section Title Page
______ ____ ____ Section Title Page ______ ____ ____
Servo Circuit Waveforms..............................................4-15
IC 301 System Control & Tuning Control MPU Pin
Functions Table.............................................................4-16
CP-1 Board (SY-A) System Control & Servo
Circuit Diagram (SLV-L45AR).....................................4-17
CP-1 Board (SY-A) System Control & Servo
Circuit Diagram (SLV-L65HFAR/L75HFAR)..............4-19
5. ADJUSTMENTS
1. Maintaining and Checking the Mechanism...............5-1
l -1. Regular Checks and Maintenance Items...............5-1
1-1-1. Regular Checks................................................5-1
1-1-2. Cleaning............................................................5-1
1-2 Service Tools...........................................................5-2
1-2-1. Service Tools...................................................5-2
1-2-2. Using the Relay Cable (J-6090-057-A)............5-3
2. An Overview of the Mechanism................................5-3
2-1. Names of the Main Parts........................................5-3
2-1-1. Cassette Mechanism Assembly........................5-3
2-1-2. Top View..........................................................5-4
2-1-3. Under Side........................................................5-4
2-2. An Overview of the Mechanism Modes................5-5
2-2-1. Mechanism Mode Switching Table..................5-5
2-2-2. Movement Check List for the Main Parts of the
Mechanism........................................................5-6
2-2-3. How to Check the Mechanism
Mode Position...................................................5-6
2-2-4. Self-Diagnosis Display.....................................5-6
3. Disassembling the Main Parts of the Mechanism.....5-7
3-1. How to Make the Mechanism Move......................5-7
3-1-1. How to Operate the Loading Motor Using
ADC Voltage Supply.......................................5-7
3-1-2. Operating the Loading Motor
by the Manual Method......................................5-7
3-1-3. Making the Mechanism Move
Using the Manual Method................................5-7
3-2. Mechanism Unit.....................................................5-8
3-3. Cassette Drive Mechanism....................................5-8
3-3-1. Cassette Mechanism Assembly........................5-8
3-3-2. Cassette Drive Gear..........................................5-9
3-3-3. Door opener, Under Frame and Stand L...........5-9
3-3-4. Start Rack Gear and Front Rack Gear..............5-10
3-4. Cleaner Roller Assembly.......................................5-10
3-5. Cylinder (DRUM)..................................................5-11
3-5-1. Cylinder Motor (ROTOR and STATOR).........5-11
3-5-2. Cylinder Assembly...........................................5-11
3-6. FE Head and ACE Head........................................5-12
3-6-1. Audio R/PHead Assembly (ACE HEAD).......5-12
3-6-2. Full Erase Head................................................5-12
3-7. Capstan Motor........................................................5-13
3-7-1. Capstan Motor..................................................5-13
3-7-2. Capstan Brake Assembly..................................5-13
3-8. Loading Motor Assembly and
Worm Gear Assembly............................................5-14
3-9. Pinch Roller Pressure Mechanism.........................5-14
3-9-1. Pinch Roller Lever Assembly...........................5-14
3-9-2. Pinch Lift Cam and Pinch Cam Gear...............5-15
3-10. LGuide Lever Assembly and
Load Lever Assembly..........................................5-16
3-11. BTLever Assembly.............................................5-16
3-12. Reel Drive Mechanism........................................5-17
3-12-1. Reel Belt, Reel Pulley, Friction Gear
Assembly and Clutch Change Lever..............5-17
3-12-2. Clutch Mounting Assembly............................5-17

– 4 –
Section Title Page
______ ____ ____
3-12-3. S Soft Lever, Supply ReelAssembly
and S Reel Gear .............................................. 5-17
3-12-4. T Soft BrakeAssembly, Take Up Reel
Assembly, T Reel Gear ................................... 5-18
3-13. Brakes .................................................................. 5-18
3-13-1. S Brake Assembly, T Brake
Assembly, T Brake ACT Slide ........................ 5-18
3-13-2. Brake Control Lever and Brake ACT Lever
Assembly ........................................................ 5-19
3-13-3. S Brake ACT Slide and BT Spring Lever
Assembly ........................................................ 5-19
3-14. Guides .................................................................. 5-20
3-14-1. Guide Roller Assembly................................... 5-20
3-14-2. S and T Incline MountingAssemblies............ 5-20
3-15. Wheel Gear 2, Main Cam and Mode Switch ....... 5-21
3-16. Crescent Slide ...................................................... 5-22
3-17. S Load Gear, T Load Gear, S Load Lever
Assembly and T Load Lever Assembly ............... 5-23
3-18. Tape Sensors, Reel Sensor and EP SW Lever ..... 5-24
3-18-1. Tape Top Sensor and Tape End Sensor ........... 5-24
3-18-2. Reel Sensor ..................................................... 5-24
3-18-3. EP Switch Lever ............................................. 5-24
4. Mechanism Checks and Adjustments........................ 5-25
4-1. Reel Table Torque Check ....................................... 5-25
4-2. Adjusting the BT Lever Assembly Position and
Checking the Back Tension Torque in Play Mode..... 5-25
4-2-1. BT Lever Pole Position Adjustment ................. 5-25
4-2-2. Checking the Back Tension Torque
Play Mode......................................................... 5-25
4-3. Tape Path Adjustment ............................................ 5-26
4-3-1. Adjustment Procedure ...................................... 5-26
4-3-2. Load Lever Assembly Height Adjustment ....... 5-26
4-3-3. Guide Roller Height Adjustment ...................... 5-27
4-3-4. Audio R/P Head (ACE HEAD) Height
Adjustment, Azimuth Adjustment and
Horizontal Position Adjustment........................ 5-28
4-3-5. Checking After Adjustment .............................. 5-29E
6. ELECTRICAL ADJUSTMENTS
Circuit Boards Location ................................................ 6-1
Self -Diagnosis Display................................................. 6-2
1. Self-Diagnosis Contents and Mechanism Mode
Display ...................................................................... 6-2
2. Electrical Adjustment ................................................ 6-4
2-1. Servo Circuit Adjustment....................................... 6-4
2-1-1. Test Equipment and Standards Required .......... 6-4
2-1-2. Location of Adjustment Points ......................... 6-4
2-1-3. Switching Position Adjustment ........................ 6-5
2-1-4. SP STIL V-LOCK Adjustment ......................... 6-5
2-2. Video Circuit Relay Jig .......................................... 6-6
2-2-1. Test Equipment and Standards Required .......... 6-6
2-3. MTS Decoder CircuitAdjustment
(SLV-L65HFAR/L75HFAR only).......................... 6-7
2-3-1. Test Equipment and Standards Required .......... 6-7
2-3-2. Location of Adjustment Points ......................... 6-7
2-3-3. Stereo/SAP Filter Adjustment .......................... 6-8
2-3-4. Stereo VCO Adjustment ................................... 6-8
2-3-5. Input Level Adjustment .................................... 6-8
2-3-6. Separation Adjustment...................................... 6-8
2-3-7. Audio Output Mode and Output Signal Check ... 6-9
2-4. IF Circuit Adjustment ............................................ 6-10E
2-4-1. Test Equipment and Standard Required ........... 6-10E
2-4-2. Location of Adjustment Point........................... 6-10E
2-4-3. RF AGC Adjustment........................................ 6-10E
3. Test Points for Tape Path Adjustment ....................... 6-10E
7. EXPLODED VIEWS
7-1. Cabinet & Chassis Parts......................................... 7-1
7-2. Mechanism Parts-1 ................................................ 7-2
7-3. Mechanism Parts-2 ................................................ 7-4E
8. ELECTRICAL PARTS LIST ................................. 8-1
Hardware List................................................................ 8-9E
Section Title Page
______ ____ ____

1-1
SECTION 1
GENERAL
SLV-L45AR/L65HFAR/L75HFAR
This section is extracted from SLV-
L75HFAR instruction manual.

1-2

1-3

1-4

1-5

1-6

1-7

1-8 E

2-1
SECTION 2
DISASSEMBLY
1-1.REMOVAL OF CABINET,MECHANISM UNITAND MAIN BOARD
REMOVINGTHE CABINET PARTS (Fig.1-1-1 )
1. Remove the cabinet and bottom cover by removing the
four screws 1and four screws 2.
2. Remove the front panel by removing the locks of the
clamps (A) using a screwdriver, etc. and slightly rotating
the bottom part in the direction of the arrow.
Notes:• Electrical adjustments for the this model can be
performed with only the cabinet removed.
• When replacing the bottom cover, do not tighten
the screws 2too much. Excess tightness may
damage the screws taps on the chassis.
REMOVINGTHE MECHANISM MAIN UNIT AND
THE CP-1 PWB ASSEMBLY (Fig.1-1-2 and 1-1-3)
After removing the cabinet parts, remove the mechanism
unit and the CP-1 PWB assembly connected as follows.
1. Spread out the lock clamps (C) in the arrow direction
slightly and remove the TM-1 PWB as shown in Fig. 1-1-2.
2. Remove the screw 4at the chassis.
3. Remove the red screw 5in the chassis, the red screw
6, and remove the holder in this order. (SLV-L45AR)
Remove the screw 5in the chassis, the screw 6, and
the holder in this order. (SLV-L65HFAR/L75HFAR)
4. Remove the two screws 7and two screws 8of the
mechanism unit. The two screws 8of the cassette tray
can be removed easily by pushing the tray lock lever in
the arrow direction to remove the lock as shown in the
enlarge view Aand by pushing the lid opener lever in
the arrow direction to remove the lock as shown in the
enlarge view B.
5. Lift up the whole mechanism unit and main board (CP-1
PWB assembly), and as shown in Fig. 1-1-3, push the
two lock clamps (D) of the chassis in the arrow direction
so that they can be removed from the chassis.
Fig.1-1-1
1
1
1
1
2
2
2
2
Cabinet
Bottom Cover
Main Unit
Clamps(A)
Front Panel
SLV-L45AR/L65HFAR/L75HFAR

2-2
3
8
5
7
8
47
6
Fig. 1-1-2
(C)
(C)
Holder
TM-1 PWB
Chassis
B
Lid Opener Lever
A
Tray Lock Lever
Cassette Tray
(C)
(C)
Terminal Board
(C)(C)
(B)
TM-2 PWB
SLV-L75HFAR
SLV-L45AR
(B)
TM-2 PWB
SLV-L65HFAR
TM-2 PWB
Fig. 1-1-3
Mechanism Main Unit
TM-1 PWB
Clamps(D)
Chassis
CP-1 PWB Assembly
VP-1 PWB Assembly
TM-2 PWB
SLV-L45AR SLV-L75HFAR
SLV-L65HFAR

2-3
2. Operate the unit using the buttons on TM-1 PWB or the
remote control.
Screws 9
Fig. 1-1-4
CP-1 PWB Assembly (Foil side)
TM-1 PWB
Mechanism Main Unit
Terminal Boord
Cassette Compartment
TM-2 PWB
1-3. INSTALLATION OFTHE FRONT PANEL
When installing the front panel to the chassis after repaires and adjustments.
1. Pressing down the door opener lever of the mechanism
main unit.
2. Set the cassette door to half-opened state as shown in
Fig. 1-1-5, and install the front panel to the chassis.
Note: Opened cassette door position does not install the
front panel to the chassis.
Fig. 1-1-5
Jutted part of
Cassette Holder
Door Opener Lever
Front Panel
Cassette Door
(Position B)
Cassette Door
(Position A)
E
1-2.TEMPORARILY SETTING UP AND CONNECTING CP-1 PWB ASSEMBLY
The following is an example of how to place and connect the main board without a jig, when repairing the CP-1 PWB
assembly.
1. Place the mechanism unit and main board up side down
as a whole on a flat surface with foil side of the main
board facing up.

3-1
SECTION 3
DIAGRAMS
SLV-L45AR/L65HFAR/L75HFAR
CIRCUIT BOARDS LOCATION
CP-1 PWB Assembly
TM-1 PWB
TM-2 PWB
VP-1 PWB Assembly
3 in 1 Tuner
(Tuner/IF/RF Conv.)

3-2
MECHANISM CONNECTION DIAGRAM

3-3 3-4
SLV-L45AR/L65HFAR/L75HFAR
OVERALL WIRING DIAGRAM (SLV-L45AR)

SLV-L45AR/L65HFAR/L75HFAR
OVERALL WIRING DIAGRAM (SLV-L65HFAR/L75HFAR)
3-5 3-6

3-7 3-8
SLV-L45AR/L65HFAR/L75HFAR
SYSTEM CONTROL & SERVO CIRCUIT DIAGRAM (SLV-L45AR)