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Pioneer SX-1080 Service Manual

Pioneer SX-1080
65 pages
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AM/FM
STEREO
RECEIVER
SX-IOSO
SERVICE
MANUAL
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Pioneer SX-1080 Specifications

General IconGeneral
Total Harmonic Distortion0.1% (at rated power)
Tuning RangeFM, MW
Damping Factor30
Input Sensitivity2.5mV (MM), 150mV (line)
Output150mV (line), 1V (Pre out)
Speaker Load Impedance4Ω to 16Ω
Frequency Response5Hz to 100kHz
Signal to Noise Ratio90dB (line)
Semiconductors4 x FET, 6 x IC
Power Output120 watts per channel (8 ohms, 20Hz-20kHz)

Summary

Specifications

Semiconductor and General Specifications

Details semiconductor types and key electrical/performance specifications.

Connection Diagram

System Connection Guide

Illustrates how to connect external devices like turntables, tape decks, and speakers.

Front Panel Facilities

Primary Front Panel Controls

Covers power, volume, tone, and speaker selection controls.

Input Selection and Tone/Filter Controls

Details input source selection, tone/filter adjustments, and muting.

Front Panel Tuning and Indicators

Tuning and Signal Meters

Tuning knob, signal meter, and tuning meter for station tuning.

Operational Indicators and Switches

Stereo indicator, tape monitor, mode, and duplicate switches.

Disassembly

Disassembly Procedures

Step-by-step instructions for taking the unit apart for servicing.

Parts Location

Front Panel View

Identifies components on the front panel assembly.

Internal Component Views

Shows component locations with front panel removed.

Top and Bottom Views

Identifies major internal components from top and bottom.

Rear Panel View

Identifies rear panel connections and terminals.

Level Diagram

Signal Level Flow Diagram

Illustrates signal levels through different amplifier stages.

Block Diagram

System Block Diagram

High-level overview of the receiver's functional blocks and signal paths.

Circuit Descriptions

FM Tuner Circuitry

Details the FM front-end, IF amplifier, and multiplex decoder.

AM Tuner and Input Circuits

Explains AM tuner, phono, and microphone input circuits.

Amplifier Stages

Describes flat, tone control, and power amplifier circuits.

Meter, Protection, and Power Supply Circuits

Explains meter amplifier, protection, and power supply circuits.

Adjustment

AM Tuner Adjustment Procedures

Steps for adjusting AM tuner tracking and output.

FM Tuner and MPX Adjustment

Procedures for adjusting FM tuner sensitivity, selectivity, and MPX circuits.

Power Amplifier and Meter Adjustment

Procedures for adjusting power amplifier bias and meter levels.

Dial Cord Stringing

Dial Cord Installation Instructions

Instructions for stringing the dial cord for the tuning mechanism.

Exploded Views

Exterior Component Layout

Exploded view of the unit's exterior parts and their assembly.

Internal Component Layouts

Exploded views of internal panel stay and chassis components.

Rear Panel Component Layout

Exploded view of rear panel parts and connections.

Schematic Diagrams, P.C. Board Patterns and Parts List

Miscellaneous Parts List

Comprehensive list of miscellaneous parts used in the unit.

Schematic Diagram

Overall schematic diagram of the receiver's circuitry.

Tuner Assembly Parts List

Detailed parts list for the tuner assembly.

Power Transistor Connector Assembly Parts

Parts list for the power transistor connector assembly.

Tone Control Assembly Parts List

Parts list for the tone control circuitry.

Flat Amplifier Assembly Parts List

Parts list for the flat amplifier section.

Power Amplifier Assembly Parts List

Parts list for the power amplifier modules.

Speaker Selector Assembly Parts List

Parts list for the speaker selector mechanism.

Function Equalizer Assembly Parts List

Parts list for the function equalizer circuit.

Filter Assembly Parts List

Parts list for the filter circuits.

Power Supply Assembly Parts List

Parts list for the power supply components.

Terminal Assemblies Parts List

Parts list for various terminal connection assemblies.

Speaker Terminal Assembly Parts List

Parts list for the speaker terminal connectors.

Protection Assembly Parts List

Parts list for the protection circuit components.

Packing

Packing and Shipping Procedures

Instructions for packing the unit for shipment or storage.

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