JVC HR-J683M Manuals

Manuals and User Guides for JVC HR-J683M. We have 1 JVC HR-J683M manual available for free PDF download: Service Manual

JVC HR-J683M Service Manual (88 pages)

Brand: JVC | Category: VCR | Size: 23 MB

Table of Contents
2
CHARTS and DIAGRAMS (4-1 to 4-12)
6
Main, A/C Head, Mini Front and Loading Motor Circuit Boards[Hr-J683M]
7
Dangerous Voltage
7
Main, A/C Head, Mini Front and Loading Motor Circuit Boards[Hr-J486En/J486M]
9
Remote Control Schematic Diagram[Hr-J486M/J683M]
12
Video/Audio Schematic Diagram[Hr-J486En/J486M]
13
Switching Regulator Schematic Diagram
15
Safety Precaution
18
Section 5 Parts List
18
Electrical Parts List
18
Main Board Assembly
18
Important Safety Precautions
25
Disassembly
27
Disassembly Flow Chart
27
How to Read the Disassembly and Assembly
27
Disassembly/Assembly Method
27
Service Position
30
How to Take out the Mechanism and Main Board Assemblies
30
Mechanism Service Mode
31
How to Set the "MECHANISM SERVICE MODE
31
Emergency Display Function
32
Displaying the Emergency Information
32
Clearing the Emergency History
32
Emergency Content Description
33
Emergency Detail Information 1
34
Emergency Detail Information 2
35
Syscon Circuit
36
Syscon CPU Pin Function (IC3001)
36
Mechanism Adjustment
38
Before Starting Repair and Adjustment
38
Precautions
38
Checking for Proper Mechanical Operations
38
Manually Removing the Cassette Tape
38
Jigs and Tools Required for Adjustment
39
Maintenance and Inspection
40
Replacement of Major Parts
43
Before Starting Disassembling (Phase Matching between Mechanical Parts)
43
How to Set the Mechanism Assembling Mode
43
Cassette Holder Assembly
43
Pinch Roller Arm Assembly
45
Guide Arm Assembly and Press Lever Assembly
45
Audio Control Head
45
Loading Motor
45
Capstan Motor
46
Pole Base Assembly (Supply or Take-Up Side)
46
Rotary Encoder
47
Clutch Unit
47
Change Lever Assembly, Direct Gear, Clutch Gear and Coupling Gear
47
Link Lever
48
Cassette Gear, Control Cam and Worm Gear
48
Control Plate
48
Loading Arm Gear (Supply or Take-Up Side) and Loading Arm Gear Shaft
49
Take-Up Lever, Take-Up Head and Control Plate Guide
50
Capstan Brake Assembly
50
Sub Brake Assembly (Take-Up Side)
50
Main Brake Assembly (Take-Up Side), Reel Disk (Take-Up Side) and Main Brake Assembly (Supply Side)
50
Tension Brake Assembly, Reel Disk (Supply Side) and Tension Arm Assembly
51
Idler Lever, Idler Arm Assembly
51
Stator Assembly
51
Rotor Assembly
51
Upper Drum Assembly
52
Compatibility Adjustment
53
Checking/Adjustment of FM Waveform Linearity
53
Checking/Adjustment of the Height and Tilt of the Audio
54
Control Head
54
Checking/Adjustment of the Audio Control Head Phase (X-Value)
54
Checking/Adjustment of the Standard Tracking Preset
55
Checking/Adjustment of the Tension Pole Position
55
Electrical Adjustment
57
Precaution
57
Required Test Equipments
57
Required Adjustment Tools
57
Color (Colour) Bar Signal,Color (Colour) Bar Pattern
57
Switch Settings and Standard Precautions
57
EVR Adjustment
57
Servo Circuit
58
Switching Point
58
Slow Tracking Preset
58
Video Circuit
58
AUTO PICTURE Initial Setting
58
Demodulator Circuit
59
Input Level
59
Stereo VCO
59
Stereo Filter
59
Separation - 1
59
Separation - 2
60
Sap Vco
60
Syscon Circuit
60
Timer Clock
60
Charts and Diagrams
61
Notes of Schematic Diagram
61
Circuit Board Notes
62
Board Interconnections
63
Video/Audio Schematic Diagrams
64
System Control Schematic Diagram
65
Switching Regulator Schematic Diagram
66
Tuner/Demod Schematic Diagram
67
Display, Mini Front and Shuttle Schematic Diagrams
68
Bs Connection and Lithium Battery Schematic Diagrams
69
Terminal Schematic Diagram
69
Main, A/C Head, Mini Front, Shuttle and Loading Motor Circuit Boards
70
Fdp Grid Assignment and Anode Connection
72
Voltage Charts
73
System Control Block Diagram
74
Video Block Diagram
75
Audio Block Diagram
76
Parts List
77
Packing and Accessory Assembly <M1
77
Cabinet and Chassis Assembly <M2
79
Mechanism Assembly
80
Mechanism Assembly M4
81
Electrical Parts List
82
Main Board Assembly <03
82
Audio Control Head Board Assembly <12
87
Mini Front Board Assembly(Hr-J686M)<28
87
Loading Motor Board Assembly <55
87
Shuttle Board Assembly(Hr-J686En) <85
88
Lithium Battery Board Assembly <93
88

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