Denon DRS-810 Service Manual

DENON
SERVICE
MANUAL
MODEL
DRS-810
STEREO
CASSETTE
TAPE
DECK
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OPERATING
INSTRUCTIONS
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DISASSEMBLY
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NIPPON
COLUMBIA
CoO.
LTD.

Denon DRS-810 Specifications

General

Brand	Denon
Model	DRS-810
Category	Tape Deck
Language	English

Summary

Important Safety Information

General Safety Warnings

Essential precautions to prevent fire, electric shock, and damage to the appliance.

Model-Specific Safety Precautions

Safety guidelines for British and Australian models regarding mains lead wiring.

Notes on Usage and Environmental Precautions

Front Panel Controls and Features

Tape Transport and Counter Functions

Details on buttons for tape movement, counter reset, and memory stop.

Audio and Noise Reduction Settings

Explanation of Dolby NR, MPX Filter, Bias Fine, Balance, and Output Level controls.

Playback and Monitoring Features

Product Features and Connection Guide

System Connection and Installation

Instructions for connecting the deck to an amplifier and safety during installation.

Advanced Recording and Playback Functions

Music Search System Operation

How to use the Music Search system to locate songs automatically.

Recording Level and Bias Adjustment

Guidelines for setting proper recording levels and adjusting bias for optimal quality.

REC/REC MUTE and Pause Button Usage

Recording Procedure and Cautions

Step-by-Step Recording Guide

Detailed steps for recording audio onto a cassette tape.

Important Recording Cautions and REC RETURN

Warnings about accidental erasure and usage of the REC RETURN function.

Tape Monitoring and Noise Reduction Systems

Using the Tape Monitor Button

Dolby B & C Noise Reduction Explained

Dolby HX-PRO Headroom Extension System

Troubleshooting Common Issues

Problem Identification and Resolution

A guide to diagnosing and fixing common operational problems with the cassette deck.

Timer Recording and Playback

Setting Up Timer Recording

Procedure for setting up unattended recording using an external audio timer.

Setting Up Timer Playback

Procedure for setting up unattended playback using an external audio timer.

Technical Specifications

Performance and Electrical Specifications

Mechanism Section Adjustments

Pinch Roller Maintenance and Checks

Instructions for exchanging and verifying the pinch roller's condition and crimp.

Head Replacement and Visual Check

Recording/Playback Head Adjustments

Height and Tilt Angle Calibration

Detailed steps for adjusting the head height and tilt angle using a jig.

Disassembly Procedures

External Panel and Knob Removal

Internal Component Removal

Electrical Section Adjustments and Checks

General Adjustment Precautions

Tape Transport and Azimuth Adjustments

Procedures for checking tape transport and adjusting the azimuth alignment.

Detailed Electrical Checks and Adjustments

Azimuth and Erasure Head Servicing

Tape Transport Torque and Timing Checks

Checking take-up torque, FF/REW torques, back tension, and FF/REW times.

Tape Type Detection and Switch Checks

Playback and Recording Adjustments

Tape Speed and Playback Level Adjustments

Playback Frequency Response Adjustment

Recording Section Calibration

Adjusting recording levels and frequency response for optimal recording.