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Denon DCD-425 Service Manual

Denon DCD-425
32 pages
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DENON
........
SERVICE
MANUAL
MODEL
DCD-425
MODEL
DCD-335
STEREO
CD
PLAYER
DCD-425
OPERATING
INSTRUCTIONS
SPECIFICATIONS
NOTE
FOR
HANDLING
OF
LASER
PICK-UP
DISASSEMBLY
ADJUSTMENT
SEMICONDUCTORS
PRINTED
WIRING
BOARD
NOTE
FOR
PARTS
LIST
PRINTED
WIRING
BOARD
PARTS
LIST
PARTS
LIST
OF
EXPLODED
VIEW
EXPLODED
VIEW
OF
CHASSIS
AND
CABINET
EXPLODED
VIEW
OF
CD
MECHANISM
PARTS
LIST
OF
CD
MECHANISM
BLOCK
DIAGRAM
WIRING
DIAGRAM
PARTS
LIST
OF
ACCESSORIES
AND
PACKING
VIEW
SCHEMATIC
DIAGRAM
e
Some
illustration
using
in
this
service
manual
is
slightly
different
from
the
actual
set.
NIPPON
COLUMBIA
CO.
LTD.
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Denon DCD-425 Specifications

General IconGeneral
Frequency Response2 Hz - 20 kHz
Total harmonic distortion0.0025%
Line output2V
Channels2
Digital OutputCoaxial
Disc formatCD

Summary

OPERATING INSTRUCTIONS AND FEATURES

Safety Instructions and Warnings

Comprehensive safety warnings, handling precautions, and operational guidelines.

Notes on Usage and Product Features

Handling advice, multilingual observations, and key features of the CD player.

Names and Functions of Parts

Detailed identification of the CD player's controls, displays, and connectors.

Playback Operations and Modes

Instructions for various playback functions: programming, repeat, pause, random, intro scan.

Remote Control Unit Usage

Instructions for operating the CD player using the wireless remote control.

TECHNICAL PROCEDURES AND MAINTENANCE

Timer Playback, Connection, and Troubleshooting

Setup for timer playback, system connections, and common issue resolution.

Compact Disc Handling and Storage

Proper methods for handling and storing compact discs.

Laser Pick-up Description and Handling

Detailed explanation of the laser pick-up component and specific handling instructions.

Electrical Pin Connections

Pin assignments and circuit diagrams for key internal components.

Laser Pick-up Maintenance and Deterioration

Procedures for laser pick-up care, adjustment, and identifying deterioration.

Disassembly Procedures: Top Cover and Front Panel

Step-by-step guide for removing the outer casing and front panel.

Disassembly: CD Mechanism and Rear Panel

Instructions for detaching the CD mechanism and rear panel assembly.

Adjustment Methods and Presets

Necessary equipment and initial preset settings for unit adjustments.

Adjustment Procedures with Disc

Specific steps for focus offset, tracking offset, and gain adjustments using a reference disc.

COMPONENT IDENTIFICATION AND DIAGRAMS

Semiconductor Component Details (ICs)

Detailed list of integrated circuits, pinouts, and their functions.

Microcontroller and Servo IC Functions

Pin functions for key microcontrollers and servo system ICs.

Other Integrated Circuits and Components

Identification of miscellaneous ICs, transistors, diodes, and IC protectors.

Transistors, Diodes, and Sensors

Specific types and identifiers for transistors, diodes, and remote sensors.

Display Tube and Switch Connections

FL tube details, pin connections, and anode connections for display elements.

Printed Wiring Board Layout

Schematic overview of the printed circuit board component placement.

Printed Wiring Board Parts List

Detailed list of components mounted on the main unit's PCBs.

Chassis and Cabinet Parts List

Parts identification for the unit's external structure and internal frame.

Exploded View of Chassis and Cabinet

Visual breakdown and assembly of the unit's physical housing.

Exploded View of CD Mechanism

Visual breakdown and parts list for the CD reading mechanism.

System Block Diagram

High-level functional overview of the CD player's internal architecture.

Wiring Diagram

Detailed schematic illustrating internal electrical connections between units.

Accessories and Packing Information

List of included accessories, packaging details, and model variations.

Schematic Diagrams

Detailed circuit schematics for comprehensive troubleshooting and repair.

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