SLV-L44AR, SLV-L66HFAR - Sony VCR Service Manual (repair manual). Page 3

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
Reproducción/búsqueda a distintas velocidades ........... 1-6
Grabación de programas de televisión con el
temporizador instantáneo .............................................. 1-6
Comprobación/cancelación de ajustes del
temporizador ................................................................. 1-6
Búsquedas con la función de índice .............................. 1-6
Grabación de programas estéreo y bilingües ................ 1-7
Edición con otra videograbadora .................................. 1-7
Ajuste de la imagen ....................................................... 1-7
Indice visual .................................................................. 1-8E

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

Circuit Boards Location ................................................ 3-1
Overall wiring Diagram ................................................ 3-3
Mechanism Connection Diagram .................................. 3-5
Video & Audio Circuit Diagram (SLV-L44AR) ........... 3-6
Video Circuit Diagram (SLV-L66HFAR) ..................... 3-9
System Control  & Servo Circuit Diagram
(SLV-L44AR) ................................................................ 3-12
System Control  & Servo Circuit Diagram
(SLV-L66HFAR) ........................................................... 3-15
Audio Circuit Diagram (SLV-L66HFAR) ..................... 3-18

CP-1 Board (PW-A) Power Supply Circuit Diagram ... 4-1
CP-1 Board (SY-A) System Control & Servo
Circuit Diagram (SLV-L44AR) ..................................... 4-3
CP-1 Board (SY-A) System Control & Servo
Circuit Diagram (SLV-L66HFAR) ................................ 4-5
IC 301 System Control & Tuning Control MPU Pin
Functions Table ............................................................. 4-7
Servo Circuit Waveforms .............................................. 4-8
TM-1, 2 Boards Operation Key, Display & Timer
Circuit Diagram (SLV-L44AR) ..................................... 4-9
A7101 Display (FLD) Grid/Anode Assignment
Drawing & Table ........................................................... 4-10
TM-1, 2 Boards Operation Key, Display & Timer
Circuit Diagram (SLV-L66HFAR) ................................ 4-13
A7101 Display (FLD) Grid/Anode Assignment
Drawing & Table ........................................................... 4-15
CP-1 Board (VA-A) Video, Audio & Tuner
Circuit Diagram (SLV-L44AR) ..................................... 4-19

Video Circuit Waveforms .............................................. 4-21
CP-1 Board (VA-A) Video, Audio & Tuner
Circuit Diagram (SLV-L66HFAR) ................................ 4-22
Video Circuit Waveforms .............................................. 4-24
VP-1 Board Video Pre-Amp circuit Diagram
(SLV-L44AR) ................................................................ 4-25
VP-1 Board Video Pre-Amp circuit Diagram
(SLV-L66HFAR) ........................................................... 4-25

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

      A DC 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/P Head 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. L Guide Lever Assembly and

  Load Lever Assembly .......................................... 5-16

3-11. BT Lever Assembly ............................................. 5-16
3-12. Reel Drive Mechanism ........................................ 5-17