Hitachi VT-M728E User Manual

;
SERVICE
MANUAL
SPECIFICATIONS
Format:
Recording:
Tape Speed:
Tape Width:
Operation Temperature:
\ Video:
Recording Time:
Aerial Input:
RF Output:
Video Input:
3 Video Output:
} S/N Ratio (Video):
S/N Ratio (Audio):
Horizontal Resolution:
Audio Input:
Audio Output:
Audio Frequency Range:
Fast Forward/Rewind Time:
Power:
Power Consumption:
Timer:
Cabinet Size:
Weight:
Accessory Included:
NY
[TK] No.3188E |
=a VT-M728E
S, SW, SWM, AU, AUB)
Atal od
VHS PAL Standard
Rotary Two-Héad Helical Scan Azimuth Recording
23.39 mm/sec.
12.7 mm
5°C to 40°C
PAL & MESECAM colour (system B & G)
240 min. (with E-240 cassette)
VHF channels 2 — 12 [For DS, SW, SWM]
VHF channels 0 — 11 [For AU, AUB]
CATV channels $1 — S20 [For DS]
UHF channels 21 — 69 [For DS, SW, SWM]
UHF channels 28 — 63 [For AU, AUB]
UHF channels 37 (34 — 42 adjustable) (Systern G)
[For SW, SWM]
UHF channels 37 (34 — 42 adjustable) (System G or !]
[For DS]
UHF channels 0 or 1 [System B] [For AU, AUB]
0.5 to 1.5V p-p 75 ohm Unbalanced
1V p-p 75 ohm Unbalanced
43 dB
43 dB
Colour 260 lines
—8 dBm 50 Kohm
—8 dBm 1 Kohm
70 Hz to 12 kHz
About 7 minutes (with £-240 cassette)
AC 100—110V/115—127V/200—220V/230—250V, 50/60 Hz
[For DS, SW, SWM]
AC 240, 50 Hz [For AU, AUB}
23W {including timer)
12 hour digital indication
370 mm{(W) x 89 mim(H) x 320 mm(D)
5.4 kg
1 — Aerial cable
1 — Infrared remote control unit
1 — Power socket adapter
2 — Batteries
* Design and specifications are subject to change without notice.
This video deck is a VHS type video
recorder. For proper operation, only
the VHS type cassette must be
used.
Technical
Information
MANUALS RELATED TO THE VT-M728E(DS,SW,SWM,AU,AUB)
Name of Manual Chapters included
Technical Data English 3188E. Chapters 1-6
) SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
VIDEO CASSETTE RECORDER
November 1989
TOKAI WORKS

Hitachi VT-M728E Specifications

General

Type	VHS
Number of Heads	2
Signal-to-Noise Ratio	43 dB
Audio	Mono
Tuner	Yes
Remote Control	Yes
Timer	Yes
Playback Speed	SP/LP
Input/Output	RCA in/out, RF in/out
Recording System	Rotary two-head helical scanning system
Playback System	Rotary two-head helical scanning system

Summary

Specifications

Manuals Related to VT-M728E

Technical Data

Lists technical data manuals.

Technical Information

Lists technical information manuals.

Chapter 1: Controls and Functions

Feature Table

Provides a comparative feature overview for different models.

VTR Controls and Indicators

Explains the operation of VTR buttons and indicators.

Channel, Clock, and Timer Setup

Guides on setting video channels, clock, and timer functions.

Recording, Playback, and Timer Operations

Covers recording, playback, and timer recording procedures.

Special Characteristics

Details unique VTR features like tape counter and OSD.

Chapter 2: Disassembly

Component Identification and Locations

Identifies circuit boards and mechanical components.

Case and Circuit Board Removal

Procedures for removing the VTR casing and circuit boards.

Mechanical Component Removal

Steps to remove main mechanical assemblies.

Chapter 3: Electric Circuit Adjustments

Test Equipment and Cautions

Lists necessary test equipment and adjustment precautions.

Servo and Chroma Circuit Adjustments

Covers adjustments for servo and Y/Chroma circuits.

Delay Line, VCO, Audio, and OSD Adjustments

Adjustments for delay line, VCO, audio bias, and OSD.

Chapter 4: Mechanism Adjustment

Jigs and Tapes for Adjustment

Lists specialized tools and tapes for mechanism adjustments.

Mechanical Parts Adjustment

Procedures for adjusting mechanism state switch and gears.

Tape Transport System Adjustment

Adjustments for reel disk height and tension.

Head Adjustments

Covers A/C head height, tilt, azimuth, and X value adjustments.

Chapter 5: Schematic/Circuit Board Diagrams

Schematic Reading and Cautions

How to read schematics and use MOS ICs safely.

Internal Wiring and Specific Circuit Schematics

Detailed wiring diagrams and schematics for various circuits.

Chapter 6: Replacement Parts List

Electrical and Mechanical Parts Lists

Comprehensive lists of electrical and mechanical replacement parts.

Exploded Views

Visual guides showing assembly and part locations.