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Denon DRA-295 Service Manual

Denon DRA-295
35 pages
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Hi-Fi AM-FM Stereo Receiver
SERVICE MANUAL
MODEL
DRA-295
AM-FM STEREO RECEIVER
SAFETY PRECAUTIONS .......................................... 36
SPECIFICATIONS ..................................................... 36
DISASSEMBLY ......................................................... 37
ADJUSTMENT...................................................... 38,39
BLOCK DIAGRAM ..................................................... 40
LEVEL DIAGRAM ...................................................... 41
SEMICONDUCTORS .......................................... 42~46
PRINTED WIRING BOARDS .............................. 47~51
NOTE FOR PARTS LIST........................................... 52
PARTS LIST OF P.W.B. UNIT ASS'Y ................. 53~59
EXPLODED VIEW ..................................................... 60
PARTS LIST OF EXPLODED VIEW .................... 61,62
PACKING VIEW ........................................................ 63
— TABLE OF CONTENTS —
Some illustrations using in this service manual are slightly different from the actual set.
PARTS LIST OF PACKING & ACCESSORIES ........ 63
WIRING DIAGRAM.................................................... 64
SCHEMATIC DIAGRAMS ................................... 65~69
(1/5) INPUT UNIT ........................................................... 65
VIDEO UNIT ........................................................... 65
(2/5) VOLUME UNIT ....................................................... 66
CONNECTOR UNIT ............................................... 66
(3/5) MAIN UNIT ............................................................. 67
(4/5) FRONT UNIT .......................................................... 68
SWITCH UNIT ........................................................ 68
POWER SW/HP UNIT............................................ 68
(5/5) TUNER UNIT .......................................................... 69
For U.S.A., Canada
& Europe model
14-14, AKASAKA 4-CHOME, MINATO-KU, TOKYO 107-8011 JAPAN
Telephone: 03 (3584) 8111
X0118 842 NC 0108

Other manuals for Denon DRA-295

Questions and Answers:

Denon DRA-295 Specifications

General IconGeneral
Impedance8 ohms
Frequency Response10 Hz - 100 kHz (+1, -3 dB)
Total Harmonic Distortion0.08%
Signal to Noise Ratio95 dB (line)
Tuning RangeFM, MW
Damping Factor60
Input Impedance47 kohms
Tuner SectionFM/AM
Preset Stations40
Power Output50W per channel (8 ohms, 20Hz-20kHz, 0.08% THD)
Input Sensitivity2.5mV (MM)
Speaker Load Impedance8 to 16 ohms
Speaker Impedance4-16 ohms

Summary

Safety Precautions

Leakage Current Check

Procedure for checking leakage current before returning the unit.

Specifications

Audio, Video, and Tuner Specifications

Details on audio, video, and tuner section parameters, including input/output levels.

General and Remote Control Specifications

Power supply, dimensions, weight, and remote control unit details.

Disassembly Procedures

Component Removal Steps

Instructions for removing top, front, and rear panels.

Adjustment Procedures

Tuner Section Alignment

Details on FM and AM alignment procedures for the tuner section.

Audio Section Adjustment

Idling Current Measurement

Procedure for measuring and adjusting the idling current.

Block Diagram Overview

Level Diagram

Semiconductor Components

IC Pin Assignments

Detailed pin functions for the CXP82840-321Q microcontroller.

Transistor Types

DTA and DTC Series Transistor Information

Details on DTA and DTC series transistors, including pinouts.

Diodes and LEDs

Diode Types and LED Characteristics

Information on various diode types, including LEDs.

FL Display Pin Assignment

Printed Wiring Board Layouts

Main P.W.B. Unit Layout

Component layout and routing for the main printed wiring board.

Parts List Notes and Warnings

Resistor and Capacitor Identification Guide

Guidelines for identifying resistor and capacitor types and values.

P.W.B. Unit Parts List

Semiconductor Components List

List of semiconductor parts used in the P.W.B. units.

Capacitor Components List

List of capacitor parts used in the P.W.B. units.

Resistor Components List

List of resistor parts used in the P.W.B. units.

Exploded View Diagram

Exploded Parts List

Main and Front P.W.B. Assemblies Parts

Parts breakdown for the main and front printed wiring boards.

Packing and Accessories

Packing List Details

List of items included in the product packaging.

Wiring Diagram

Schematic Diagrams (1/5)

Input and Video Sections

Schematics for the input and video signal processing sections.

Schematic Diagrams (2/5)

Volume and Connection Sections

Schematics for volume control and board interconnections.

Schematic Diagrams (3/5)

Main Section Schematics

Schematics for the main unit circuitry.

Schematic Diagrams (4/5)

Front Section Schematics

Schematics for the front panel circuitry.

Schematic Diagrams (5/5)

Tuner Section Schematics

Detailed schematics for the FM/AM tuner circuitry.

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