Sony SLV-L78HF VCR Repair Manuals

Manuals and User Guides for Sony SLV-L78HF VCR Repair. We have 2 Sony SLV-L78HF VCR Repair manuals available for free PDF download: Service Manual

Sony SLV-L78HF Service Manual

Sony SLV-L78HF Service Manual (127 pages)

Brand: Sony | Category: VCR | Size: 9.59 MB

Table of Contents

Table of Contents
4
Service Note

6
General

8
Disassembly

27
- Upper Case, Front Panel Block Assembly
  27
- Board, Jk-161 Board
  27
- Rear Panel
  28
- Board with S Mechanism Deck
  28
  - Assembly
    28
S Mechanism Deck Assembly

29
- Board
  29
- Internal Views
  30
- Circuit Boards Location
  31
Block Diagrams

32
- Overall Block Diagram
  32
- Video Block Diagram
  33
- Servo/System Control Block Diagram
  34
- Audio Block Diagram
  35
- Tuner Block Diagram
  36
- Power Supply Block Diagram
  37
Printed Wiring Boards and Schematic Diagrams

38
- Frame Schematic Diagram
  38
  - Schematic Diagrams
    39
  - Printed Wiring Board
    39
  - Rec/Pb Amp
    40
  - Video
    41
  - Servo/System Control
    42
    
    Schematic Diagram
    44
  - Mode Control
    44
    
    Schematic Diagram
    45
  - Tuner
    45
    
    Schematic Diagram
    46
  - Power Supply
    46
  - Operation Switches
    47
    
    Printed Wiring Board and Schematic Diagram
    47
  - Line in 2)
    47
- System Control - Mechanism Block Interface
  48
  - (Ma-317 Board Ic160)
    48
- System Control - Servo Peripheral Circuit Interface
  48
  - (Ma-317 Board Ic160)
    49
  - System Control - System Control Peripheral Circuit Interface
    49
- System Control and Rf Modulator
  49
  - System Control - Video/Rp Block Interface
    49
- System Control - Audio Block Interface
  49
- Adjustments
  
  51
Repair Parts List

58
- Chassis Section
  59
- Mechanism Deck-1
  60
- Mechanism Deck-2
  61
- Mechanism Deck-3
  62
- Electrical Parts List
  63

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Sony SLV-L78HF Service Manual

Sony SLV-L78HF Service Manual (72 pages)

Brand: Sony | Category: VCR | Size: 9.7 MB

Table of Contents

Table of Contents
4
Service Note

6
General

8
- Tel 13942296513
  9
Disassembly

27
- Upper Case, Front Panel Block Assembly
  27
- Board, Jk-161 Board
  27
- Rear Panel
  28
  - Assembly
    28
- S Mechanism Deck Assembly
  29
  - Board
    29
- Internal Views
  30
- Circuit Boards Location
  31
Block Diagrams

32
- Overall Block Diagram
  32
- Video Block Diagram
  33
- Servo/System Control Block Diagram
  34
- Audio Block Diagram
  35
- Tuner Block Diagram
  36
- Power Supply Block Diagram
  37
Printed Wiring Boards and Schematic Diagrams

38
- Frame Schematic Diagram
  38
  - Printed Wiring Board
    39
  - Rec/Pb Amp) Schematic Diagram
    40
  - Video) Schematic Diagram
    41
  - Servo/System Control
    42
    
    Schematic Diagram
    42
  - Audio) Schematic Diagram
    43
  - Mode Control
    44
    
    Schematic Diagram
    44
  - Tuner) Schematic Diagram
    45
  - Power Supply
    46
    
    Schematic Diagram
    46
  - Operation Switches)
    47
    
    Printed Wiring Board and Schematic Diagram
    47
  - Line in 2)
    47
    
    Schematic Diagram
    47
Interface, IC Pin Function Description

48
6 Adjustments

51
- Mechanical Adjustments
  51
- Electrical Adjustments
  51
- Preparation before Adjustment
  51
- Equipment Required
  51
- Equipment Connection
  51
- Input Signal Check
  51
- Alignment Tape
  51
- Input/Output Levels and Impedance
  52
- Adjustment Sequence
  52
- Power Supply Check
  52
- Output Voltage Check (MA-317 Board)
  52
- Servo System Check
  53
- RF Switching Position
  53
  - AF Switching Position Adjustments (MA-317 Board)
    53
- Video System Checks and Adjustment
  54
- X'tal OSC Check (MA-317 Board)
  54
- SYNC AGC Check (MA-317 Board)
  54
- White Clip/Dark Clip Check (MA-317 Board)
  54
- Recording y Level Check (MA-317 Board)
  54
- Y U163
  54
- Recording Chroma Level Check(MA-317 Board)
  54
- Playback Level Check (MA-317 Board)
  54
- Audio System Adjustment
  56
- ACE Head Adjustment
  56
- E-E Output Level Check
  56
- Overall Output Level and Distortion Factor Check
  56
- Overall Noise Level Check
  56
- TUNER SYSTEM ADJUSTMENT (Hifi MODEL)
  56
- Separation Adjustment (MA-317 Board)
  56
- Adjusting Parts Location Diagram
  57
Repair Parts List

58
- Exploded Views
  58
- Front Panel Assembly and Upper Case
  58
- Chassis Section
  59
- Mechanism Deck-1
  60
- Mechanism Deck-2
  61
- Mechanism Deck-3
  62
- Electrical Parts List
  63

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