Sansui RA 500 Service Manual

Page 1

OPERATING INSTRUCTIONS
& SERVICE MANUAL

SOLID-ST ATE REVERBERATION AMPLIFIER

SANSUI fill-500
_

SANSUI ELECTRIC COMPANY LIMITED

Page 2

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

The RA-500 reverberation amplifier is a unique com-
ponent to add a new thrilling pleasure to your stereo
enjoyment. It can provide reverberation effects to all
the program sources set up on your existing stereo
control amplifier, including the playback from, record
ing on a tape deck, and dubbing between two tape
decks. The continuously controllable reverberation
time, multicolored reverberation indicator and other
new ideas have been engineered into the RA-500.
This manual has been prepared to guide you in con-
necting and operating the reverberation amplifier cor-
rectly. Please read it carefully before operating the
amplifier and retain it for future reference.

SWITCHES AND CONTROLS ........................... 3

CONNECTIONS ............................................. 4
CONNECTIONS /OPERATION ..................... 5, 6
HINTS ON USE /SPECIFICATIONS /

ACCESSORIES ......................................... 7, 8
SCHEMATIC DIAGRAM ................................. 9
BLOCK DIAGRAM /DISASSEMBLY

PROCEDURE /DIAL CORD ........................ 10
PRINTED CIRCUIT BOARDS

AND PARTS LIST ................................. 11, 12

OTHER PARTS AND THEIR
POSITION ON CHASSIS ........................ 13, 14

Page 4

CONNECTIONS /0PERATION

.1?

.\
u 7 cot.

A-t -
TAPE DECK A TAPE DECK B 7 "

RECORDING -PLAYBACK RECORDING ' PLAYEACK

RECORD PLAVER

HAEIOU
OUTPUTS

RA>500
INPUTS

WALL OUTLET

REVERBERATIO'N AMP.

RECEIVER OR
CONTROL AMPLIFIER

CONNECTION TO RECEIVER OR CONTROL AMPLIFIER

RA-SOO
REVEREERTION AMP SENTR/OEP ESP

IN TAPEIRECIOquuts
[LEFT © 621]]: (:3 LEFT ]
R'GHT @ dim; 411:}: © RIGHT SPEAKER SYSTEM

OUT TAPElPLAYorMONI Inputs LEFT SPEAKER RIGHT SPEA
[LEFT © 21:311- 13% (0) LEFT ] KER
RIGHT © cam 4mg}: © RIGHT

CONNECTION 0F TAPE DECK TO RA-SOO

RA-SOO
TAPE DECK Aer/and B TAPE DECK

REC Recording inputs
TLEFT @ Cm m: © LEFT
mm o cm tics: @ mam]

PLAY Playback Outputs
[LEFT © aialJl. 41133: © LEFT]
RIGHT © W 2133: © mew

To Reverberate Sound From Any Pro-
gram Solver-Record Player, Tuner
or Microphone -rExcept Tape Deck

1. Set the Tape Monitor switch on the receiver
(or control amplifier) to its PLAYBACK or
ON position.

2. Turn the Tape Mode selector on the RA-
500 to its OFF position.

3. Depress the Reverberation On button.

4. Adjust the Reverberation Time control to
the desired reverberation.

To Reverberate Sound From or
Through the Tape Deck

Playback

1. Set the Tape Monitor switch on the receiver
(or control amplifier) to its PLAYBACK or
ON position.

2. Turn the Tape Mode selector on the RA-
500 to A or B depending on which jacks are
being used for playback.

3. Depress the Reverberation On button.

4. Operate the tape deck in the playback
mode.

5. Adjust the Reverberation Time control to
the desired reverberation.

Recording

1. Set the Tape Monitor switch on the receiver
(or control amplifier) to its PLAYBACK or
ON position.

2. Turn the Tape Mode selector on the RA-
500 to A or B depending on which jacks are
being used for recording.

3. Depress the Reverberation Record button.
4. Operate the tape deck in the recording
mode.

5. Adjust the Reverberation Time control to
the desired reverberation.

Notes:

- If the Reverberation On button is depressed
during the recording process. the original pro-
gram can be recorded without reverberation

while the reverberated sound comes from the
speakers.

- If the Reverberation OH button is depressed
during the recording process, no reverberation
is added to the sound of the recording nor to
the sound from the speakers.

Dubbing

1. Set the Tape Monitor switch on the receiver
(or control amplifier) to its PLAYBACK or
ON position.

2. When recording from the tape deck A to
the tape deck B, turn the Tape Mode selector
to A) B; when recording from the B to the A,
turn the selector to BDA.

3. Depress the Reverberation Record button.
4. Operate one tape deck in the playback
mode and another in the recording mode.

5. Adjust the Reverberation Time control to
the desired reverberation.

Note: If you want not to add reverberation
during the dubbing process, depress the Rever-
beration OH button. If the Reverberation On
button is depressed duving the dubbing process,
the original tape can be recorded without re-
verberation while the reverberated sound
comes from the speakers.

Monitoring

If your tape deck has its own preamplifier as
well as separate recording and playback heads,
you can monitor the tape instantly after the
recording is made and while the recording is
still in progress. For use with a two-head tape
recorder which can pick up a signal before the
recording is made, you can listen to it as well.
If a two-head tape recorder which does not
employ this arrangement is used for recording,
not playback, the Tape Monitor switch on the
control amplifier (or receiver) should be set to
its SOURCE or OFF position, otherwise no
sound comes from the speakers.