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Sansui QRX-4500 Service Manual

Sansui QRX-4500
50 pages
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Sansui QRX-4500 Specifications

General IconGeneral
TypeQuadraphonic Receiver
Total Harmonic Distortion0.5%
Tuning RangeFM: 87.5 - 108 MHz, AM: 530 - 1600 kHz
InputsPhono, AUX, Tape
OutputsTape out
Dimensions540 x 161 x 351mm
Weight16200 g
Input sensitivity2.5mV (MM), 150mV (line)
Signal to noise ratio70dB (line)
Channel separation40dB
Speaker load impedance4 to 16 ohms
Frequency Response20Hz to 20kHz

Summary

Switches and Controls

Power Switch

Controls receiver power and rear AC outlet.

Mode Switch

Selects between 2-channel and 4-channel operating modes.

Selector Control

Selects program sources like PHONO, FM, AM, AUX.

Connecting Speaker Systems/Playing Records

Speaker System Connections

Guides connection of speaker systems and impedance/polarity.

Turntable Setup & Playing Records

Instructions for turntable choice, connection, and record playback.

Radio Reception

FM & AM Tuning Procedures

Steps for tuning FM and AM stations and optimizing signals.

2-Channel Tape Decks

2-Channel Tape Deck Operation

Recording, playback, and connection procedures for 2-channel decks.

Recording from One Tape Deck to the Other

Instructions for dubbing tapes between two connected decks.

Recording & Playback Procedures

Step-by-step guide for recording and playback.

4-Channel Tape Deck

Recording and Playback on a 4-Channel Tape Deck

Explains recording/playback of 4-channel tapes.

Specifications

Disassembly Procedure

Removing Outer Casing

Steps for disassembling the receiver's wood case, front panel, and bottom board.

Tuner Block Removal

Procedure for removing and disconnecting the tuner block.

Schematic Diagram of Audio Section

Schematic Diagram of Tuner Section

Alignment

Current Adjustment

Steps for adjusting current levels during alignment.

FM Alignment Procedure

Detailed steps for aligning the FM section.

FM Multiplex Circuit Alignment

Alignment procedure for the FM multiplex circuit.

Output Adjustment

Steps for adjusting output levels during alignment.

AM Alignment Procedure

Detailed steps for aligning the AM section.

Printed Circuit Boards and Parts List

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