Denon DN-730R User Manual

IDENON
SERVICE MANUA
MODEL DN-730R
STEREO CASSE'I-I'E TAPE DECK
-- TABLE OF CONTENTS --
SPECIFICATIONS .......................................................................................................................................................... 3
BLOCK DIAGRAM ......................................................................................................................................................... J,
LEVEL DIAGRAM .......................................................................................................................................................... !5
DISASSEMBLY INSTRUCTIONS ........................................................................................................................... 6-7
ADJUSTING AND CHECKING THE MECHANISM SECTION .................................................................................. 3
ADJLISTING THE ELECTRICAL SECTIONS ....................................................................................................... 9-- 10
NOTE FOR PARTS LIST ........................................................................................................................................... l'D
PARTS LIST OF 3U-2584 AUDIO METER UNIT .............................................................................................. 11-13
PARTS LIST OF 3U-2063 POWER SUPPLY UNIT ................................................................................................. 13
PARTS LIST OF EXPLODED VIEW .......................................................................................................................... 14
EXPLODED VIEW ....................................................................................................................................................... 15
EXPLODED VIEW OF CASSEq-I-E MECHANISM .................................................................................................... 16
PARTS LIST OF CASSEqq-E MECHANISM EXPLODED VIEW ............................................................................ 17
PARTS LIST OF PACKING & ACCESSORIES ........................................................................................................ 17
PACKING & ACCESSORIES ..................................................................................................................................... t7
P.W. BOARD OF 3U-2584 AUDIO/METER UNIT .................................................................................................. 18
P.W. BOARD OF 3U-2063 POWER SUPPLY UNIT ............................................................................................... 19
SEMJCONDUCTORS ........................................................................................................................................... 20-21
BUNDLE DIAGRAM .................................................................................................................................................... 2:1
WIRING DIAGRAM ..................................................................................................................................................... 22
SCHEMATIC DIAGRAM ............................................................................................................................................. ,!'.3
NIPPON COLUMBIA CO.. LTD.

Denon DN-730R Specifications

General

Brand	Denon
Model	DN-730R
Category	Tape Deck
Language	English

Summary

Specifications

Block Diagram

Level Diagram

Disassembly Instructions

How to Remove the Front Panel

Step-by-step guide to remove the front panel and cassette window.

How to Remove the Front Escutcheon Ass'y

Instructions for removing the front escutcheon assembly.

How to Remove the Mechanisms

Procedure to detach the main mechanism unit.

How to Remove the Meter Circuit Board

Steps for removing the meter circuit board.

How to Remove the Cassette Door

Steps to remove the cassette door and its components.

How to Remove the Audio Circuit Board

Procedure for removing the audio circuit board.

How to Remove the Power Supply Circuit Board

Guide to detaching the power supply circuit board.

Adjusting and Checking the Mechanism Section

Replacing the Pinch Roller

Instructions for replacing the pinch roller and cleaning surfaces.

Checking the Pressure Force of the Pinch Roller

Method for checking the pinch roller pressure force.

Replacing the Record/Playback Head

Steps for removing and replacing the record/playback head.

Replacing the ERASE HEAD

Procedure for replacing the erase head assembly.

Checking the Take-up Torque

How to check the cassette tape take-up torque.

Checking the FF and REW Torques

Method for checking fast forward and rewind torques.

Checking the Back Tension Torque During Record/Playback

Procedure to check back tension torque during operation.

Checking the FF and REW Times

Verification of fast forward and rewind operation times.

Checking the Existence of a Cassette Housing and the Operation of the Erase Prevention, Metal and Chrome Switch

Confirming cassette housing detection and switch operation.

Adjusting and Checking the Electrical Section

Tape Transport Check

Checking tape path alignment and contact with the R/P head.

Adjusting the Azimuth

Method for adjusting the azimuth screw for optimal playback.

Checking and Adjusting the Tape Speed

Procedure for checking and adjusting tape speed using a frequency counter.

Adjusting the Playback and Recording Section

Adjusting playback level, frequency response, and recording gain.

Equipment for Adjusting and Checking

Measuring Tape

List of measuring tapes and their uses for adjustment and checking.

Measuring Instrument

List of measuring instruments required for service.

Parts List of GU-2778 Audio/Meter Unit

Semiconductors Group

List of semiconductor components for the audio/meter unit.

Resistors Group

List of resistors used in the audio/meter unit.

Capacitors Group

List of capacitor components for the audio/meter unit.

Other Parts

List of miscellaneous parts for the audio/meter unit.

Parts List of 3U-2603 Power Supply Unit

Parts List of Exploded View

Exploded View

Exploded View of Cassette Mechanism

Parts List of Cassette Mechanism Exploded View

Parts List of Packing & Accessories

P.W. Board of GU-2778 Audio/Meter Unit

P.W. Board of 3U-2603 Power Supply Unit

Semiconductors

IC

Pin diagrams and identification for integrated circuits.

Transistors

Diodes

Bundle Diagram

Wiring Diagram

Schematic Diagram