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Pioneer SX-990 User Manual

Pioneer SX-990
29 pages
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INSTALLATION,
PERATION
ND
SERVICE
MANUAL
lncluding
PARTS
LIST,
CtRCUtT
DtAGRAMS.
TROUBLESHOOTING
AND
MOUNTING
TEMPLATE
PIONEEIiR"
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Pioneer SX-990 Specifications

General IconGeneral
Total Harmonic Distortion0.8%
Tuning RangeFM, MW
Frequency Response20 Hz to 20, 000 Hz
Signal to Noise Ratio75dB (MM)
Weight10.3kg
Input Sensitivity2.5 mV (MM)
Speaker Load Impedance4Ω to 16Ω
Semiconductors28 x transistors
Power Output28 watts per channel (8 ohms, 20-20, 000 Hz)

Summary

Pioneer SX-990 Receiver Features

High-Performance Tuner and Reception Capabilities

Details FM tuner sensitivity, selectivity, and AM antenna reception.

Built-in Circuits and Operational Versatility

Highlights FM MPX circuit, versatile circuitry, and included accessories.

Elegant Front Panel Design

Describes the aesthetic design of the front panel with its controls.

Line Voltage Selection and Fuse Handling

Voltage Selection and Fuse Replacement Guide

Explains how to select the correct line voltage and replace fuses.

Rear Connections and System Setup

Stereo System Overview and Component Connections

General overview of connecting stereo components like turntables and tape decks.

Installation and Listening Room Considerations

Guidelines for setting up the system and optimizing the listening environment.

Front Panel Controls and Indicators

Indicator Lamps and Tuning Controls

Covers indicator lamps, tuning knob, and signal/tuning meters.

Audio Adjustment Controls (Volume, Tone, Balance, Loudness)

Groups volume, bass, treble, balance, and loudness controls.

Function Selector Switches (Speakers, Mode, Muting, Tape Monitor)

Encompasses switches for speaker selection, mode, muting, and tape monitoring.

Input/Output Jacks (Phones, Microphone)

Refers to headphone and microphone jacks on the front panel.

Receiver Operation Controls Explained

Tuning Meters and FM Stereo Indicator Usage

Guides on using tuning meters for radio reception and the FM stereo indicator.

Tuning Knob and Source Selector Switch

Covers the main tuning knob and selector switch for program sources.

Audio Adjustments and Headphone Jack

Explains bass control, treble, and headphone jack usage.

Front Panel Controls and Functions

Treble, Balance, and Volume Controls

Explains treble, balance, and volume adjustments.

Filter, Loudness, Muting, and Tape Monitor Switches

Describes switches for noise filtering, loudness, muting, and tape monitoring.

Mode Switch and Microphone Jack

Details mode selection and microphone input.

Rear Panel Terminals and Connectors

Input and Output Terminals Overview

Details various input/output terminals like Phono, AUX, Tape.

Antenna and Ground Connections

Specifies antenna input terminals and ground connections.

Rear Panel Connectors and Features

Tape Deck Interface and Antenna Terminals

Covers DIN tape connector and AM/FM antenna terminals.

Amplifier and Speaker Connections

Details pre-amp, main-amp, center channel, and speaker outputs.

Power and Accessory Connections

Covers switched/unswitched AC outlets and the AC power cord.

Connection Guidelines for External Devices

Loudspeaker System Connection

Detailed instructions for connecting speakers to output terminals.

Antenna Connection and Grounding

Guides for FM and AM antenna setup and grounding.

External Device Connections

Grounding and Turntable Hookup

Grounding advice and turntable connection procedures.

Tape Deck and Cartridge Tape Player Connections

Instructions for connecting tape decks and cartridge players.

Receiver Operation Procedures

Radio Broadcast Reception (FM/AM)

Guides for tuning FM and AM stations and optimizing reception.

Audio Source Playback and Microphone Usage

Instructions for playing records/tapes and using the microphone.

Tape Operations and Advanced System Configurations

Tape Recording, Playback, and Monitoring

Covers recording, playback, and monitoring tapes with a deck.

System Expansion and Configurations

Guides on multi-amplifier, 3-D, and center channel systems.

Technical Specifications

Component and Audio Section Specifications

Lists transistors, ICs, diodes, and audio section performance details.

Tuner, Power Supply, Dimensions, and Weight

Covers FM/AM tuner specs, power supply, dimensions, and weight.

Troubleshooting Common Issues

Diagnosing and Resolving Audio Noise

Guides on identifying and fixing various types of noise during operation.

Addressing Power and Howling Problems

Troubleshooting power-on issues and audio howling.

FM Section Alignment Procedures

FM Section Alignment Steps and Equipment

Step-by-step instructions for FM alignment using test equipment.

Alignment Procedures for MPX and AM Sections

Multiplex (MPX) Section Alignment

Detailed steps for multiplex section alignment.

AM Section Alignment Steps

Detailed steps for AM section alignment.

Component Layout Diagrams

Top View Component Layout

Visual guide to components on the top of the unit.

Bottom View Component Layout

Visual guide to components on the bottom of the unit.

Parts Listings

Electronic Components and Switches

Lists capacitors, resistors, coils, switches, and potentiometers.

Miscellaneous and External Parts

Lists other parts like front panel elements and connectors.

Detailed Parts Lists by Unit

FM Front End and FM IF Unit Components

Lists parts for the FM front end and FM IF units.

More Detailed Parts Listings

Coils, Transformers, and Compound Parts

Lists specific coils, transformers, and compound parts.

MPX Unit Components

Muting and Indicator Unit Components

AM Tuner Unit Components

Head Amp and Control Amp Unit Components

Control Amp Unit Capacitors and Resistors

Lists capacitors and resistors for the control amp unit.

Control Amp and Control Unit Components

Control Amp Unit Resistors and Transistors

Lists resistors and transistors for the control amp unit.

Switch Units and Main Amp Unit Components

Push Switch Units Parts (Capacitors, Resistors, Switches)

Lists parts for the push switch units.

Main Amp Unit Capacitors

Lists capacitors for the main amp unit.

Main Amp Unit Components

Main Amp Unit Resistors

Lists resistors for the main amp unit.

Main Amp Unit Diodes, Transistors, and Potentiometers

Lists diodes, transistors, and potentiometers for the main amp unit.

Power Supply Unit and Dial Cord Stringing

Dial Cord Stringing Instructions

Guides on how to string the dial cord for the tuning capacitor.

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