JVC TD-W717TN - User Manual

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Contents
.
Safety
Precautions
I
.
Features
/
Specifications
H
.
Instructions
1
.
Location
of
Main Parts
*
•
•
2
.
Remova
!
of
Main
Parts
*
•
•
3
.
Maln
Adjustment
4
.
Wlring
Connections
—
5
.
Block
Diagram
25
6
.
Standard
Schematic
Diagrams
Page
2
7
.
Location
of
P
.
C
.
Board
parts
4
30
and
Parts
List
5
8
.
Exploded
View
of
Enclosure
Component
Parts
and
Parts
List
12
40
13
9
.
Exploded
View
of
Mechanism
Component
Parts
18
42
23
and Parts
List
\
43
24
10
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Packing
lllusration and Parts
List
/
No
.
4358
June
1995

JVC TD-W717TN Specifications

General

Brand	JVC
Model	TD-W717TN
Category	Cassette Player
Language	English

Summary

Safety Precautions

Leakage Current Safety Test

Test to ensure product safety by measuring current from exposed metal parts.

UK Safety Warning

Important safety information for users in the UK regarding equipment compliance.

Important Safety Precautions

Power Transformer Installation

Securely fix and check the power transformer according to specifications.

Power Cord Inspection

Ensure power cord markings are correct and inspect for exterior damage.

Cord Bushing Installation

Install the cord bushing by the specified tool and marking.

Wiring Terminal Procedures

Guidelines for wiring terminal connections, including winding and arrangement.

Heat Generating Parts Management

Management of heat-generating components to prevent contact with other parts.

Fuse Installation

Ensure all fuses are securely connected and use specified ratings.

Operating Instructions

Troubleshooting Common Issues

Addresses common operational problems and their potential causes.

Technical Specifications

Details the technical parameters and features of the cassette deck.

Product Introduction

Key Features and Functions

Overview of the cassette deck's main features and capabilities.

Compu Link Control System

Explanation of the JVC Compu Link system for component integration.

Automatic Operation Modes

Details on auto-reverse, synchro dubbing, and DDRP features.

Important Cautions and Warnings

Critical safety and operational warnings to prevent damage or injury.

Connections and Operations

Connecting to Audio Systems

Guide for connecting the deck to a stereo amplifier and COMPU LINK.

Cassette Loading Procedure

Step-by-step instructions for properly loading a cassette tape.

General Operations Guide

Basic operational procedures and important notes for correct usage.

Component Identification

Front Panel Controls and Indicators

Identifies and explains the function of each part on the front panel.

Playback Operations

Detailed steps for playing back cassette tapes on decks A and B.

Playback Features

Explains microphone mixing during playback and continuous play mode.

Advanced Operations

Pitch Control and Tape Speed Adjustment

Adjusts tape speed in deck A for pitch variation.

Music Scan and Blank Skip Functions

Features for locating tunes and skipping blank tape sections.

Recording Procedures

Step-by-step guide for recording, including DDRP and Compu Cal.

Compu Calibration Troubleshooting

Explains Compu Cal errors and their solutions.

Recording and Playback Features

Alternate Continuous Recording

Describes continuous recording between decks A and B with auto selection.

Microphone Mixing During Recording

How to mix microphone audio with recording sources.

Recording Level Adjustment

Guidance on setting optimal recording levels for different tapes.

Automatic Record Muting

Function to leave blank sections automatically during recording.

Tape Erasing and Counter Operation

Procedures for erasing tapes and using the linear tape counter.

Dolby NR and HX PRO Features

Explanation of Dolby NR and HX PRO systems for improved sound quality.

System Integration and Dubbing

Compu Link Control System Functions

Details on auto power, source selection, synchro recording, and DDRP.

Dubbing Operations

Instructions for synchro dubbing, muting, NR, blank skip, and tape editing.

Maintenance Procedures

Importance of Cleaning Components

Explains why cleaning heads, capstan, and pinch rollers is crucial.

Cleaning Head Assembly

Steps for cleaning heads, pinch rollers, and capstan.

Head Demagnetization

Procedure for demagnetizing heads and other metal parts.

Main Component Locations

Top View of Main Boards

Identifies major components on the top view of the main boards.

Mechanism Top View (Deck B)

Shows the layout of the mechanism assembly's top view for deck B.

Mechanism Bottom View

Illustrates the bottom view of the mechanism assembly, highlighting key parts.

Disassembly Procedures

Removing Enclosure Parts

Steps to remove the top cover and front panel assembly.

Mechanism Assembly Removal

Guide for detaching the mechanism assembly and its control board.

Part Removal Steps

Eject Arm and Mechanism Holder Removal

Procedures for removing the eject arm and mechanism holder assemblies.

Board Assembly Removal

Steps to remove switch/volume, headphone/mic jack, key switch, and main boards.

Reassembly and Mechanism Components

Front Panel Reassembly

Steps for reassembling the front panel with its associated boards.

Cassette Mechanism Section

Details on head mount and pinch roller assembly removal and reassembly.

Mechanism Component Details

FM Bracket and Capstan Motor Assembly

Removal and reassembly of the FM bracket and capstan motor.

Flywheel and Motor Assemblies

Details on flywheel, reel motor, and actuator motor assemblies.

Mechanism Gear and Cam Assembly

Mechanism Board Removal

Steps for removing the mechanism board and its gearing.

Control Cam and Actuator Gear Removal

Procedures for removing control cam and actuator gears.

Main Adjustments

Required Measuring Instruments

List of instruments needed for performing adjustments.

Power Supply Voltage Settings

How to set the line voltage selector switch according to local voltage.

Standard Switch and Knob Positions

Default positions for switches and volume knobs before adjustment.

Adjustment Points Overview

Diagram showing the locations for various adjustments.

Compu-Calibration Procedure

F.CAL Mode Setup

Steps to prepare and initiate the F.CAL mode for automatic calibration.

Calibration Adjustment Items

Details on level meter, playback, and recording character adjustments.

Compu-Calibration Error Resolution

Level Meter Sensitivity Adjustment Errors

Error codes and solutions for level meter sensitivity calibration.

Playback Level Adjustment Errors

Error codes and solutions for playback level calibration.

Recording Signal Adjustment Errors

Error codes and solutions for recording signal calibration.

Mechanism Adjustments

Head Azimuth Adjustment

Procedure to adjust head angle for maximum signal and phase difference.

Tape Speed Adjustment

Steps to adjust normal and high tape speeds using frequency counters.

Wow, Flutter, Torque Checks

Procedures for checking wow/flutter, play back torque, and fast forward/rewind torque.

Electrical Adjustments

Dolby Circuit Checking

Checks for Dolby circuits during recording mode.

Playback Level Check

Verifies playback level consistency between channels.

Playback Frequency Response Adjustment

Adjusts frequency response using test tapes and VR controls.

Bias Frequency and Slave Oscillation Adjustments

Procedures for bias frequency and HX PRO slave oscillation adjustments.

Electrical Adjustment Details

Input Sensitivity and REC;PB Response Checks

Verifies input sensitivity and REC/PB frequency response.

Recording Sensitivity, Output, and Distortion Checks

Adjusts recording sensitivity and checks maximum output and distortion.

Signal-to-Noise Ratio Check

Procedure to check signal-to-noise ratio for recording and playback.

Erasing Coefficient Check

Erasing Coefficient Measurement

Procedure to check erasing coefficient using a metal tape and band pass filter.

Wiring Connections

System Wiring Diagram

Provides a schematic view of all internal wiring connections between components.

Block Diagram

System Signal Flow Overview

Illustrates the overall signal path and functional blocks of the unit.

Schematic Diagrams

Main Board and Control Schematic

Detailed schematic for the main board and mechanism control.

Schematic Diagrams Continued

Key Switch and Standby Board Schematics

Schematics for key switch, standby LED, and main control sections.

Schematic Diagrams - Circuit Details

Motor Control and Power Schematics

Schematics for motor drivers, capstan, and reel motor controls.

PC Board Component Locations

Main Board Component Layout

Identifies component locations on the main printed circuit board.

Power Supply Board Layout

Shows component placement on the power supply board (excluding U/UT versions).

PC Board Parts List - Main and Power Supply

Main Board Parts List

Comprehensive list of components for the main printed circuit board.

Power Supply Board Parts List

Detailed parts list for the power supply board.

PC Board Parts List - Continued

Main Board Component List (Continued)

Continues the detailed parts list for the main printed circuit board.

Power Supply Board Component List (Continued)

Continues the detailed parts list for the power supply board.

Schematic Diagrams - Sub Board

Sub Board Schematics

Circuit diagrams for the sub board, including key switch and mic jack.

Schematic Diagrams - Control and Amplifier

Control and Amplifier Circuit Schematics

Schematics for control logic, DAC, and audio amplifier circuits.

Schematic Diagrams - Motor Control

Motor Control Circuit Schematics

Schematics for motor drivers, capstan, and reel motor controls.

Schematic Diagrams - Power and Logic

Power Supply and Logic Circuit Schematics

Schematics for power supply block and logic control circuits.

Mechanism Board Details

Mecha Board Component Identification

Identifies components on the mechanism board and lists them.

Sub Boards Overview

Switch;Volume and Key Switch Board Layouts

Layouts for switch/volume and key switch boards on the sub unit.

Indicator and Control Board Layouts

Shows the arrangement of standby indicator and mechanism control boards.

PC Board Parts List - Main and Power Supply

Main Board Component List (Continued)

Continues the detailed parts list for the main printed circuit board.

Power Supply Board Component List (Continued)

Continues the detailed parts list for the power supply board.

Enclosure Exploded Views

External Component Arrangement

Exploded view showing the arrangement of external enclosure parts.

Enclosure Parts List

Main Board Parts List

Comprehensive list of components for the main printed circuit board.

Sub Board Parts List

Sub Board Component Details

Detailed list of components for the sub board.

Parts List - Semiconductors and Resistors

Semiconductor Component List

List of semiconductor devices (transistors, ICs, diodes) used in the unit.

Resistor Component List

List of resistors, including their values and types.

Parts List - Resistors and Switches

Resistor Component List (Continued)

Continues the list of resistors used throughout the circuit.

Switch Component List

Lists the various tactile switches and potentiometers used.

Parts List - Resistors (Continued)

Resistor Component List (Continued)

Further listing of resistors with their specifications.

Parts List - Resistors (Continued)

Resistor Component List (Continued)

Continues the detailed list of resistors used in the unit.

Power Supply Board Details

U;UT Version Power Supply Board Layout

Diagram of the U/UT version power supply board with component numbers.

U;UT Version Power Supply Parts List

Component list specific to the U/UT version power supply board.

Mechanism Board Details

Mecha Board Component Identification

Identifies components on the mechanism board and lists them.

Sub Board Layouts

Switch;Volume and Key Switch Board Layouts

Layouts for switch/volume and key switch boards on the sub unit.

Mic and Headphone Jack Board Layouts

Illustrates the arrangement of mic and headphone jack boards.

Sub Board Component Layouts

Key Switch Board Layouts

Component layout for the key switch boards (A and B).

Indicator and Control Board Layouts

Shows the arrangement of standby indicator and mechanism control boards.

Sub Board Parts List

Sub Board Component Details

Detailed list of components for the sub board.

Parts List - Resistors and Switches (Continued)

Resistor Component List (Continued)

Continues the detailed list of resistors used in the unit.

Switch Component List (Continued)

Lists the various tactile switches and potentiometers used.

Enclosure Exploded Views

External Component Arrangement

Exploded view showing the arrangement of external enclosure parts.

Exploded View - Internal Mechanisms

Internal Mechanism Component Arrangement

Exploded view showing the layout of internal mechanism parts.

Enclosure Parts List - Details

Enclosure Component Details

Detailed list of parts for the external enclosure.

Enclosure Parts List - Continued

Enclosure Component Details (Continued)

Continues the detailed list of parts for the external enclosure.

Mechanism Exploded Views

Mechanism Component Arrangement

Exploded view showing the assembly of mechanism components.

Mechanism Parts List

Mechanism Component Details

Detailed list of parts for the mechanism assembly.

Packing and Accessories

Packing Illustration and Parts

Shows how the unit is packed and lists packing materials.

Included Accessories

Lists all accessories included with the product.