Sansui AU 888 Service Manual

Page 1

OPERATING INSTRUCTIONS
SERVICE MANUAL

SOLID-STATE STEREO AMPLIFIER

am
CTRIC COMPANY LIMITED

SAN SUI ELI

LJ

Page 2

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

The AU-888 is the most advanced professional control amplifier ever manufactured by
Sansui. Designed specifically for an ardent audiOphile like you, it features the refined dull
black panels common to all AU series professional control amplifiers from Sansui.

The preamplifier section is constructed of carefully selected low-noise PNP silicon tran-
sistors, while the power amplifier section features direct-coupled circuits specially de-
veloped with the improvement of tone quality in mind. Together, they permit the ALI-888
to deliver a full 140 watts (4.0) in music power output with unprecedentedly good tone
quality.

The AU -888 is lavishly endowed with accessory circuits. These include a Midrange Tone
Selector an improved from of the Triple Tone Control circuit that offers a choice in selec-
ting the critical frequencies of tone control; a Speaker Selector which permits connecting
three sets of speaker systems; a facilities to connect two phonographs and two tape decks;
and a tape reprint circuit which makes it possible to copy a recorded tape by utilizing two
tape decks. Special provisions have also been made to permit the amplifier to be built up
into an electronic crossover stereo system and permit comparing such a system with a
standard stereo setup.

From the superior performance characteristics to the careful finish of control knobs,
Sansuis tradition of quality is evident. Packed with the most advanced circuits throughout,
the AU-888 comes to you with the full confidence and guarantee of the manufacturer.

It is now up to you to read the contents of this manual carefully before setting out to use
it, so you may operate it correctly and obtain the maximum performance it is capable of
offering for many years to come.

CONTENTS

SWITCHES AND CONTROLS ............................................................... 3, 4, 5, 6
OPERATIONS .......................................................................................... 7, 8
-SPEAKER CONNECTIONS
-RECORD PLAYING
OPERATIONS ....................................................................................... 9, 10
--RADIO RECEPTION
-MICROPHONE
OPERATIONS ....................................................................................... 11, 12
-TAPE PLAYBACK
-TAPE RECORDING
ELECTRONIC CROSSOVER SYSTEM ...................................................... 13, 14
MAINTENANCE .............................................................................. 15, 16, 17
SPECIFICATIONS ....................................................................................... 1 8
CHARACTERISTICS/ACCESSORIES ......................................................... 19, 20
TROUBLESHOOTING CHART ............................................................... 21, 22
DISASSMBLY PROCEDURE/TEST POINTS ................................................... 23
ALIGNMENT ............................................................................................. 24
BLOCK DIAGRAM .................................................................................... 25
PRINTED CIRCUIT BOARDS AND PARTS LIST ..................... 26, 27, 28, 29, 30, 31

OTHER PARTS AND THEIR POSITION ON CHASSIS ........................... 32, 33, 34