Hitachi VK-K274R Manuals

Table of Contents

• • 2

    Table of Contents

• 3

  Safety Precaution for Repair

  • 3

    Cautions
  • 3

    Notes When Using Service Manual
  • 3

    Value Units Used in Parts List
  • 3

    Values in Schematic Diagrams
  • 4

    Identifications of Sides A/B in Circuit Board Diagrams
  • 5

    Electrostatic Protection Measures
  • 5

    Grounding for Prevention of Electrostatic Damage
  • 5

    Cautions When Handling Optical Pickup
  • 6

    Lead-Free Solder
  • 6

    Characteristics of Lead-Free Solder
  • 6

    Solder for Servicing
  • 6

    Soldering Iron for Servicing

• 7

  General Description

  • 7

    Overview
  • 7

    Servicing Method
  • 7

    Features
  • 8

    Specifications
  • 10

    Comparison of Main Control Ics

• 11

  Description of Operation

  • 11

    Structure Schematics
  • 12

    Microprocessor Pin Function Tables
  • 12

    Camera Microprocessor

• 15

  Troubleshooting

  • 15

    Trouble Diagnosis
  • 15

    Setting to Service Position
  • 16

    Trouble Diagnosis Flowchart

• 25

  Disassembly and Reassembly

  • 25

    Order of Disassembly
  • 25

    Disassembly

• 27

  Adjustment

  • 27

    Preparations for Adjustment
  • 27

    List of Equipment and Jigs
  • 27

    List of Test Equipment and Charts
  • 28

    Connections for Adjustment
  • 29

    Setting Test Equipment
  • 29

    Starting Adjustment Program (ZMAP)
  • 31

    List of Adjustment Items
  • 31

    List of Adjustments Needed After Replacing Major
  • 32

    Adjustment Flowchart
  • 33

    Data Initialize
  • 33

    Electronic Volume
  • 34

    CDS Sampling Pulse Adjustment
  • 34

    Adjustment (Camera Adjustment)
  • 35

    Auto Iris Control Adjustment
  • 35

    White Balance Adjustment
  • 36

    Chroma Gain Adjustment
  • 37

    Auto Focus
  • 37

    Zoom/Focus Tracking Adjustment
  • 38

    AF Noise Level Adjustment
  • 38

    Check of Zoom/Focus Trace
  • 39

    Spot Noise
  • 40

    Error Messages and Countermeasure

• 42

  Exploded View and Parts List

  • 42

    Exploded View
  • 43

    Replacement Parts List
  • 43

    Mechanical Parts List
  • 43

    Electrical Parts List

• 47

  Schematic, Circuit Board and Block Diagrams

  • 47

    Wiring Diagram
  • 48

    Schematic Diagrams
    • 49

      (For Display)
    • 50

      (For Printing) A-A
    • 51

      (For Printing) A-B
  • 53

    Circuit Board Diagram
  • 53

    PC Circuit Board Diagram
  • 54

    SP Circuit Board Diagram
  • 54

    CSR Circuit Board Diagram
  • 55

    Identification Parts Location
  • 56

    Block Diagrams
  • 56

    Overall Block Diagram
  • 57

    Power Block Diagram