Harman Kardon HD 990 Service Manual

harman kardon
Model
HD 990
CD/ MP3 Player
Service Manual
- Contents -
SERVICE PRECAUTIONS………….……….……2
BASIC SPECIFICATIONS………………………...5
DETAILED SPECIFICATIONS………………......6
PACKAGE (120V)..…………….…....……..………7
FRONT PANEL CONTROLS………..…………….8
REAR PANEL CONNECTIONS…………………..9
REMOTE CONTROL……………………………..10
OPERATION…………..……..……………...........11
BASIC TROUBLESHOOTING GUIDE…………15
EXPLODED VIEW (120v)….……………………16
BLOCK DIAGRAM.……………..………………..17
ELECTRICAL PARTS LIST (120v)……… …….18
PCB DRAWINGS……………………..................24
SEMICONDUCTOR PINOUTS…………………29
SCHEMATICS………………………………....…49
WIRING DIAGRAM………………………………61
harman/kardon, Inc.
8500 Balboa Blvd.
Released 2010 Northridge, CA. 91329 Rev0 10/2010
Discontinued XXXX

Harman Kardon HD 990 Specifications

Signal Format

sampling frequency	32 kHz to 96 kHz
oversampling	24 Bits/384 kHz

Discrete Analog Output Section

frequency response	20 Hz – 20 kHz +0/-0.5dB
total harmonic distortion	<0.0006% @1kHz
signal-to-noise ratio	116 dB

Power

power requirement	100-240 V 50/60 Hz
power consumption (on)	<20 Watts
power consumption (standby)	<2 Watts

Weight and Dimensions

height	63 mm
width	440 mm
depth	332 mm
weight	3.8 kg

Summary

Servicing Precautions

Handling of the Pick-Up

Essential guidelines for safely handling the optical pick-up unit.

Compact Disc Player Repair Notes

Preparations for Repair

Essential steps and precautions before starting CD player repairs.

Notes for Repair Procedures

Important considerations and procedures during the repair process.

ESD Precautions

Basic Specifications

Detailed Technical Specifications

Audio Technical Specifications

Comprehensive technical audio performance metrics.

Digital Input/Output Specifications

Details on digital audio interface performance.

Front Panel Controls

Rear Panel Connections

Remote Control Functions

Player Operation

Loading and Unloading Discs

Instructions for inserting and removing discs from the player.

Normal Playback Procedures

Steps to play audio discs in standard mode.

Programmed Play Operation

Programming Playback Sequences

Guide to creating custom playback sequences of up to 32 tracks.

Editing and Clearing Programs

Repeat Play Operation

Repeat Modes (One, All, A-B)

Instructions for repeating tracks, entire discs, or specific playback segments.

Troubleshooting Guide

Block Diagram Architecture

Schematics

SMPS Board Schematic

Main Board Schematics

Front Panel Board Schematics

Wiring Diagram