JVC HR-J271MS Manuals

2

Table of Contents

• 3

  Important Safety Precautions

• 5

  1 Disassembly

  • 5

    Disassembly Flow Chart
  • 5

    How to Read the Disassembly and Assembly
  • 5

    Disassembly/assembly Method
  • 8

    Service Position
  • 8

    How to Take Out the Mechanism and Main Board Assemblies
  • 9

    Mechanism Service Mode
  • 9

    How to Set the "MECHANISM SERVICE MODE
  • 10

    Emergency Display Function
  • 10

    Displaying the Emergency Information
  • 10

    Clearing the Emergency History
  • 11

    Emergency Content Description
  • 12

    Emergency Detail Information 1
  • 13

    Emergency Detail Information 2
  • 14

    Syscon Circuit
  • 14

    Syscon CPU Pin Function (IC3001) [HR-J677MS, HR-J777MS]

• 16

  2 Mechanism Adjustment

  • 16

    Before Starting Repair and Adjustment
  • 16

    Precautions
  • 16

    Checking for Proper Mechanical Operations
  • 16

    Manually Removing the Cassette Tape
  • 17

    Jigs and Tools Required for Adjustment
  • 18

    Maintenance and Inspection
  • 21

    Replacement of Major Parts
  • 21

    Before Starting Disassembling (Phase Matching Between Mechanical Parts)
  • 21

    How to Set the Mechanism Assembling Mode
  • 21

    Cassette Holder Assembly
  • 23

    Pinch Roller Arm Assembly
  • 23

    Guide Arm Assembly and Press Lever Assembly
  • 23

    Audio Control Head
  • 23

    Loading Motor
  • 24

    Capstan Motor
  • 24

    Pole Base Assembly (Supply or Take-up Side)
  • 25

    Rotary Encoder
  • 25

    Clutch Unit
  • 25

    Change Lever Assembly, Direct Gear, Clutch Gear and Coupling Gear
  • 26

    Link Lever
  • 26

    Cassette Gear, Control Cam and Worm Gear
  • 26

    Control Plate
  • 27

    Loading Arm Gear (Supply or Take-up Side) and Loading Arm Gear Shaft
  • 28

    Take-up Lever, Take-up Head and Control Plate Guide
  • 28

    Capstan Brake Assembly
  • 28

    Sub Brake Assembly (Take-up Side)
  • 28

    Main Brake Assembly (Take-up Side), Reel Disk (Take-up Side) and Main Brake Assembly (Supply Side)
  • 29

    Tension Brake Assembly, Reel Disk (Supply Side) and Tension Arm Assembly
  • 29

    Idler Lever, Idler Arm Assembly
  • 29

    Stator Assembly
  • 29

    Rotor Assembly
  • 30

    Upper Drum Assembly
  • 31

    Compatibility Adjustment
  • 31

    Checking/Adjustment of FM Waveform Linearity
  • 32

    Checking/Adjustment of the Height and Tilt of the Audio Control Head
  • 32

    Checking/Adjustment of the Audio Control Head Phase (X-value)
  • 33

    Checking/Adjustment of the Standard Tracking Preset
  • 33

    Checking/Adjustment of the Tension Pole Position

• 35

  3 Electrical Adjustment

  • 35

    Precaution
  • 35

    Required Test Equipments
  • 35

    Required Adjustment Tools
  • 35

    Color (Colour) Bar Signal,Color (Colour) Bar Pattern
  • 35

    Switch Settings and Standard Precautions
  • 36

    Servo Circuit
  • 36

    Switching Point
  • 36

    Slow Tracking Preset
  • 36

    Video Circuit
  • 36

    AUTO PICTURE Initial Setting
  • 37

    Syscon Circuit

38

Hr-j777ms Hr-j677ms

• 39

  Safety First
• 39

  Safety Precautions
• 40

  Basic Connections
• 40

  Installing Your New Recorder
• 41

  Initial Settings
• 41

  Video Channel Set
• 43

  Auto Set Up
• 45

  On-Screen Displays
• 46

  Select Language
• 47

  Clock Set
• 48

  PLAYBACK Basic Playback
• 49

  Playback Features
  • 49

    Slow Motion
  • 50

    Manual Tracking
  • 50

    Repeat Playback
  • 51

    Index Search
  • 51

    Skip Search
• 54

  Recording
• 55

  Recording Features
• 57

  Picture System
• 59

  System Setup (HR-J777MS Only)
• 59

  Timer Recording
• 61

  Timer Programming (HR-J777MS Only)
• 63

  Colour System
• 63

  Express Timer Programming
• 68

  Recording
• 69

  Remote Control Functions
• 69

  Special Features
• 73

  Edit to or From Another Video Recorder
• 73

  Editing
• 74

  Edit From a Camcorder
• 75

  Information On Multi-system Compatibility
• 77

  Tuner Set
• 81

  Troubleshooting
• 84

  Questions and Answers
• 85

  Index
  • 85

    Front View
  • 85

    Rear View
  • 86

    Display Panel
  • 87

    Remote Control
• 88

  Specifications
• 95

  Electrical Parts List
  • 100

    Main Board Assembly(hr-j677ms/j777ms)<03>
  • 105

    Audio Control Head Board Assembly <12>
  • 106

    Mini Front Board Asseembly(hr-j271ms/j471ms)<28>
• 107

  Notes of Schematic Diagram
• 108

  Circuit Board Notes
• 109

  Board Interconnections
• 124

  Demodulator Schematic Diagram [hr-j777ms]
• 130

  Demodulator Circuit Board [hr-j777ms]
• 131

  Remote Control Schematic Diagram
• 132

  Voltage Charts [hr-j677ms, Hr-j777ms]
• 133

  System Control Block Diagram
• 134

  Video Block Diagram

• 13

  Manual Tracking
• 13

  Instant Review
• 13

  Repeat Playback
• 14

  Index Search
• 14

  Skip Search
• 15

  Next Function Memory
• 15

  Picture Control
• 15

  Tape Position Indicator

• 24

  Auto Sp Lp Timer
• 24

  Auto Timer

• 34

  Auto Channel Set
• 35

  Manual Channel Set
• 36

  Delete a Channel