Sansui QRX 4500 Service Manual

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CE

lEGuAR MATRIX

OPERATING INSTRUCTIONS
& SERVICE MANUAL

4-CHANNEL RECEIVER

SANSUI HEX-4500

SANSUI ELECTRIC CO., LTD.

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Congratulations on joining the thousands of proud, satisfied owners of quality
stereo components from Sansui.

The QRX-4500 is a 240 watt 4-channel receiver endowed with practically all
the features necessary for enjoying every type of music in the new, enthrall
ing 4-channel format. Incorporating the Widely-acknowledged Sansui QS
REGULAR MATRIX system, it features the exclusive QS Vario-Matrix
Circuit, which (1) decodes encoded 4-channel program sources back into 4-
channel and (2) trasforms (synthesizes) conventional 2-channel sources into
4-channel. It also has complete provisions for reproducing discrete 4-channl
sources. And of course, reproduces 2-channel sources in 2-channel stereo
if you so desire.

The QRX-4500 connects up to three pairs of speaker systems for the front
channels, and two pairs for the rear channels, enabling you to hear the
reproduction in two rooms. In addition, it is provided with a Synthesizer/
Decoder Function Control and a Mode Switch to let you hear each selection
With the most effective sound effect. In short, we have made it one of the
most complete, most versatile 4-channel receivers available today.

Now it is up to you to read the instructions contained in this booklet, so that
you may take full advantage of its rich performance potential.

Again, welcome to the world of 4Achannel stereo, and our sincere gratitude
for your choice. You will not be disappointed.

CONTENTS

SWITCHES AND CONTROLS ................................................... 3~7
TO ENJOY 4-CHANNEL STEREO AT ITS BEST ........................... 8
CONNECTING SPEAKER SYSTEMS/PLAYING RECORDS ............ 9, 10
RADIO RECEPTION ............................................................ 11, 12

2-CHANNEL TAPE DECKS ..................................

4-CHANNEL TAPE DECK ...................................................... 15, 16
SIMPLE MAINTENANCE HINTS .......................................... 17, 18
SIMPLE MAINTENANCE HINTS/ACCESSORIES... ................... 19
SPECIFICATIONS ..................................................................... 20
GENERAL TROUBLESHOOTING CHART .............................. 21, 22
DISASSEMBLY PROCEDURE ............................................. 23, 24
TEST POINTS ........................................................................... 25
SCHEMATIC DIAGRAM OF AUDIO SECTION ........................ 26, 27
SCHEMATIC DIAGRAM OF TUNER SECTION ........................ 28, 29
ALIGNMENT ..................................................................... 30~32
PRINTED CIRCUIT BOARDS AND PARTS LIST ..................... 33~45

OTHER PARTS AND THEIR LOCATION ON CHASSIS ............ 46~48