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Denon DCD-1420 Service Manual

Denon DCD-1420
39 pages
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DENON
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SERVICE
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NIPPON
COLUMBIA
Co.
LTD.
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Denon DCD-1420 Specifications

General IconGeneral
TypeCD Player
Frequency Response2 Hz - 20 kHz
Total Harmonic Distortion0.0025%
Output Level2.0 V
Disc formatCD
Channel separation105 dB
Dimensions434 x 115 x 320 mm
Digital outputsCoaxial
Line outputRCA

Summary

Important Safety Instructions

Safety Instructions for Audio Set

Guidelines for safe operation, installation, and servicing of audio equipment.

Product Features

Advanced Audio Conversion and Filtering

Features like Super Linear Converter and Digital Filter for sound quality.

Control and Playback Features

Remote control, optical output, and 8cm CD playback capabilities.

Names and Functions of Parts

Core Unit Components

Description of essential parts like power switch, disc holder, and display.

Special Function Buttons

Explanation of Auto Edit and Auto Space buttons.

Unit Functions and Controls

Playback and Navigation Controls

Buttons for starting, stopping, pausing, and searching tracks.

Playback Modes

Options for random, repeat, and programmed playback.

Track Selection and Utility Buttons

Buttons for direct track access, indexing, and display modes.

Audio Output and Volume

Jacks and controls for audio output level and headphones.

Connection Procedures

Output Terminal Connection (FIX-VARIABLE)

Connecting analog output terminals to an amplifier.

Digital Output Jack Connection

Connecting digital output jacks to processors or D/A units.

Disc Handling

Opening, Closing, and Loading

Procedure for opening, closing disc holder and loading discs.

Normal CD Playback

Starting Playback

Steps to begin CD playback.

Stopping Playback

How to stop the CD playback.

Advanced CD Playback Functions

Track Search Functions

Direct track search, advancing, and returning to tracks.

Index Search

Finding and playing sections within a track via index numbers.

Programmed Playback

Programming and playing tracks in a specific order.

Playback Modes and Repeat Functions

Clearing Programmed Tracks

How to clear the programmed track list.

Repeat Playback Options

Functions for repeating all tracks, single track, or intervals.

Pausing and Quick Search

Temporarily halting playback and performing audible quick search.

Search and Playback Operations

Manual Search Functions

Performing forward and reverse search within tracks.

Auto Space Function

Inserts silent gaps between tracks during playback.

Timer-Controlled Playback

Operation and Connection

How to set up and use timer-controlled playback.

Disc and Installation Precautions

Compact Disc Handling and Storage

Guidelines for handling, cleaning, and storing compact discs.

Installation Interference Prevention

Tips to avoid interference with other electronic devices during installation.

Remote Control Operation

Battery Installation and Use

Procedures for inserting batteries and operating the remote control.

Troubleshooting

Common Playback, Program, and Remote Issues

Resolving problems with playback, disc condition, program setup, and remote operation.

Connection and Amplifier Issues

Troubleshooting issues related to cable connections and amplifier settings.

Technical Specifications

Audio and General Specifications

Details on audio performance, general characteristics, and discs.

Unit and Accessory Details

Information on remote control and supplied accessories.

Laser Pick-up Handling Notes

Component Description

Details on the components of the laser pick-up assembly.

Electrical Pin Connections

PD Connector Pinout

Pin assignment for the Photodiode connector.

Actuator & LD Connector Pinout

Pin assignment for the Laser Diode and Actuator connectors.

Laser Pick-up Handling Cautions

General Handling and Storage

Precautions for storing and preventing physical damage to the pick-up.

Laser Diode Safety

Safety measures for the laser diode, including eye protection and surge protection.

Component Specific Cautions

Handling advice for Actuator, Metal Bearing, and general handling.

Deterioration Assessment

Identifying and deciding on pick-up deterioration.

Disassembly Procedures

Chassis Component Removal

Steps to remove the top, bottom, and front covers.

CD Mechanism Disassembly

Steps to remove the loader mechanism, clamp arm, and main unit.

Adjustment Procedures

Service Program Initialization

Steps to start the service program for adjustments.

Service Program Functions

Overview of buttons and their functions within the service program.

Pre-adjustment and Equipment

Preparations and tools required before starting adjustments.

Adjustment Presets and Locations

Component Location for Adjustment

Identifying the location of adjustment points on the main unit.

Potentiometer Preset Adjustment

Setting initial values for adjustment potentiometers (VR101-VR105).

PLL Adjustment

PLL Volume VR105 Adjustment

Adjusting the PLL volume VR105 for frequency counter reading.

Tracking Offset Adjustment

VR101 Tracking Offset Adjustment

Adjusting VR101 for tracking offset using an oscilloscope.

Focus Gain Adjustment

VR102 Focus Gain Adjustment

Adjusting VR102 to symmetrize Lissajous figures on oscilloscope.

Focus Offset Adjustment

VR103 Focus Offset Adjustment

Adjusting VR103 to minimize pattern jitter on oscilloscope.

Tracking Gain and Offset Check

VR104 Tracking Gain Adjustment

Adjusting VR104 to symmetrize Lissajous figures on oscilloscope.

Tracking Offset Adjustment Check

Verifying the tracking offset adjustment.

Special Test Modes

Heat Run Mode Operation

Activating and operating the Heat Run Mode.

Chucking and Skipping Tests

Performing chucking and sound skipping tests.

IC Terminal Functions

CXA1081S IC Pinout

Detailed functions of each terminal for the CXA1081S IC.

CXA1081S Terminal Details

CXA1081S Terminal Function Descriptions

Detailed explanation of each terminal's function on the CXA1081S IC.

CXA1182AS Terminal Functions

CXA1182AS Terminal Function Descriptions

Detailed explanation of each terminal's function on the CXA1182AS IC.

IC Block Diagrams

CXA1182AS Block Diagram

Functional block diagram of the CXA1182AS IC.

CXD1125Q Block Diagram

Functional block diagram of the CXD1125Q IC.

CXD1125Q Terminal Functions

CXD1125Q Terminal Function Descriptions

Detailed explanation of each terminal's function on the CXD1125Q IC.

CXD1125Q Terminal Details

CXD1125Q Terminal Function Descriptions

Further details on terminal functions for the CXD1125Q IC.

Parts List - Servo & Sig. Pro. Unit

Semiconductor Components

List of ICs, transistors, and diodes used on the PCB.

Passive Components

List of capacitors and resistors used on the PCB.

Parts List - Display Unit

Display Unit Component List

List of components for the 2U-1753 Display Unit.

Parts List - Power Supply Unit

Power Supply Unit Component List

List of components for the 2U-1754 series Power Supply Units.

Additional Parts Listings

Other Components and Digital Unit Parts

Parts for miscellaneous items and the digital signal unit.

Exploded View Parts List

Component Identification

Reference numbers and names for parts shown in the exploded view.

Packing and Accessories List

Packing Materials and Accessories

List of items included for packaging and accessories.

FG-402 Mechanism Unit Parts List

Mechanism Unit Components

List of parts for the FG-402 mechanism unit.

Wiring Diagram

System Interconnections

Diagram showing electrical connections between main units and components.

P.W. Board Layout

Servo & Signal Unit Board

Layout diagram of the P.W. Board for the Servo & Signal Unit.

P.W. Board Layouts

Display and Power Supply Boards

Layout diagrams for Display and Power Supply Unit P.W. Boards.

Semiconductor Components

ICs, Transistors, and Diodes

Diagrams and identification for ICs, transistors, and diodes.

Schematic Diagram

System Circuit Diagram

Comprehensive schematic showing all circuit connections and components.

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