User Manuals: Hitachi VT-FX840E VCR Remote Control

Manuals and User Guides for Hitachi VT-FX840E VCR Remote Control. We have 1 Hitachi VT-FX840E VCR Remote Control manual available for free PDF download: Service Manual

Hitachi VT-FX840E Service Manual

Hitachi VT-FX840E Service Manual (91 pages)

Brand: Hitachi | Category: VCR | Size: 15 MB

Table of Contents

Contents
3
General Information
5
Specifications
5
Comparison of Features
6
Comparison of Main Control Ics
7
Tips for Servicing
8
How to Remove the Cassette When a Malfunction Has Occured
8
Trouble Display Function
9
LCD Display
9
Procedure to Display a Malfunction
9
Display of Details of Malfunction
9
Troubleshooting According to Malfunction Display
10
Customer Controls
16
VCR Customer Controls
16
Instructions on Use and Description of New Functions
16
Disassembly
19
Before Starting Disassembly
19
Identifications of Circuit Boards
19
Parts Hierarchy Chart
19
Disassembly Procedure Diagrams
20
Cassette Door and Buttons
20
SHU Board
21
Front Frame and LCD Board
21
Separation of MAS Board from US Mechanism
22
Procedure to Remove Only the US Mechanism
22
Disassembly Method
23
Front Frame, LCJ and FST Board
25
NAC and N&A Board
25
Cautions When Reinstalling the US Mechanism
27
Electric Circuit Adjustment
29
Service Positions
29
Servicing Position During Electrical Adjustment
29
Electrical Circuit Adjustment
31
Test Equipment/Jigs Necessary for Adjustment
31
Cautions on Adjustment
31
Tips for Adjustment
31
Test Points and Adjustment Points
32
MAS Circuit Board
32
Servo Circuit Adjustments
33
Switching Point Adjustment
33
X-Value Adjustment
33
Vertical Jitter Adjustment
34
Forward Slow Tracking Preset Adjustment
34
Reverse Slow Tracking Preset Adjustment
34
Audio Circuit Adjustments
35
Cylinder Rotation Accumulated Hours of Usage Display
35
List of Data in EEPROM and Initial Settings
35
Hi-Fi Audio Playback Level Check
35
List of Hidden Commands
36
EEPROM Initialization Commands
36
Caution When Replacing IC903
36
Exploded View
37
Cabinet Section
37
US-Mechanism Top View Section
39
Bottom View Section
40
FL Mechanism Section
41
Replacement Parts List
43
Mechanical Parts List
43
Electrical Parts List
44
Schematic, Circuit Board and Block Diagrams
57
Microprocessor Pin Function Table
57
Connection Diagram
59
LCD Display Schematic Diagram
60
LCD Grid Table
60
Shuttle Switch Schematic Diagram
60
Lcd/Jack Schematic Diagram
61
Front Shuttle Schematic Diagram
61
Cyl. Motor Drive Schematic Diagram
62
Capstan Motor Schematic Diagram
62
Servo Waveforms
62
Y/Chroma Waveforms
62
Main Schematic Diagram
64
Rear Jack Schematic Diagram
65
Nicam Schematic Diagram
66
A2 Schematic Diagram
66
Tape Navigation Schematic Diagram
67
Tape Navigation/Commercial Advance Schematic Diagram
68
IC Block Diagram
69
Identification of Parts Location
70
Difference Table
70
RJK, N&A Circuit Boards
74
NCM Circuit Board
77
NAC Circuit Board
78
Block Diagrams
79
System Control
79
Servo
80
Video
81
Power Supply
82
Audio
83
Microprocessor Pin Function Tables
84
LCD Driver
84

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