OPERATING INSTRUCTIONS
& SERVICE MANUAL
SOLID-STATE REVERBERATION AMPLIFIER
SANSUI RA-500
SANSUI ELECTRIC COMPANY LIMITED
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.
CONTENTS
SWITCHES AND CONTROLS.......................—.... 3
CONNECTITONE лока а ee or vera 4
CONNECTIONS / OPERATION el 5, 6
HINTS ON USE /SPECIFICATIONS /
A CE BR TE i AR Sot sss salina oe nae 7,8
SOHEMATIC TIAGRAM ©... iii: 9
BLOCK DIAGRAM DISASSEMBLY
PROCEDURE /DIAL CORD 10
PRINTED CIRCUIT BOARDS
AMO PAR TREE. kA tt
OTHER PARTS AND THEIR
POSTHON-ON CHASSS rennt rn Er 13, 14
EVE RHE ERATION
E
E ra № “sr
TA PE MODE
E
°
=
J -
и
mms
Fe
x
oo
Tn a
CE.
3
1
aC
Ц,
E
e
e
Ч
eu
я
A 5
НЯ
oo
LAE
a
er
e
+
o, L
E
i:
ch
= =
ic
se
ah
1 E
+ EL
+
3 o
AE
Se
3
y
ME
SWITCHES AND CONTROLS
CONNECTIONS
REVERBERATION INDICATOR —
The reverberation indicator is illuminated when
the Reverberation On or Record button is de-
pressed. The two rainbows, one inverted, draw
sharply and distinctly apart as the reverberation
time is shortened.
REVERBERATION TIME CONTROL
Use this control to adjust the reverberation time
while watching the reverberation indicator. To
lengthen the time, turn it clockwise; to shorten
the time, turn it counterclockwise.
POWER SWITCH ——
Push this switch once to turn the power on; push
it again to turn the power off.
POWER INDICATOR —
The power indicator is lit when the Power switch
is turned on. It remains lit while the amplifier
is on.
REVERBERATION PUSHBUTTONS —
ON—Depress this button to add reverberation to
any program source. |f it is depressed during
the recording process, the recording is made
without reverberation but only the sound from
the speakers is reverberated.
OFF—Depress this button if you want not to add
reverberation during the recording process or
while listening to records, radio broadcasts or
tapes.
RECORD—Depress this button to add reverbera-
tion to the sound of the recording.
Ÿ
TAPE MODE SELECTOR
B—Use this position to record on, or play back
through, the tape deck connected to the TAPE
DECK B jacks.
A—Use this position to record on, or play back
through, the tape deck connected to the TAPE
DECK A jacks.
OFF—Use this position to provide reverberation
effects to a program source set up on the receiver
(or control amplifier) connected to the RA-500.
With the selector switched to this position, the
reverberation amplifier is disconnected from the
tape deck circuits.
AD B—Use this position to record from the tape
deck A to the tape deck B.
Bp A—Use this position to record from the tape
deck B to the tape deck A.
GROUNDING
TAPE POCO 1) ето
FRE [PTS
[a Fo TUE
à c c—o
0 0 &=0
EARES ETETES À
RSE Pa T
A Г
ol ci i:
REAR PANEL OF RECEIVER
(or control amplifier)
VOLTAGE SELECTOR
|
TO TAPE DECK
Nm
TAPE DECK B
TAPE DECK À
POWER
FUSE
а (=>
3 AA /
B=
WALL OUTLET
1
=]
La a
TO OUTPUTS TO INPUTS TO OUTPUTS
| TOINPUTS Z > OF TAPE DECK А OF TAFE OF TAPE DECK B
DECK A [== === === = DEC IT ar = _
| i or я I IE RE |
| | / Lar oe i 3
| e \ Le Ti %
Na NX) NE ))
| ii i ra | й — xT
Ea | MENTA
CONNECTIONS / OPERATION
я Is. < % | E \ ©
AE : | | | ; 1 бе” | | | ! e №
[= тей в / \' \ ch / i Re wn WL F
a NI Eh SC
= Mr LJ da - CC |
y _ ÿ E E E а | : = = = = — ; |
— = “on - oa
TAPE DECK A | TAPE DECK B
"a
~~
RECORDING <=
+,
——> PLAY BACK
RECORDING > PLAYBACK
REVERBERATION AMP.
WIE
=
—
RA-500
OUTPUTS
1 fus wm = ii я
de : de —-
# 1: LE E
—_—
в Веер
E EEE
RA-500
INPUTS RECEIVER OR
-< [© © |456
WALL OUTLET
RA-500 RECEIVER OR
REVERBERTION AMP CONTROL AMP
IN TAPE (REC) Outputs |
[LEFT o Tp => © Leer 7
- RIGHT © ET = Е (© RIGHT - —
OUT TAPE (PLAY or MON} Inputs
| LEFT © El {ЩЕ © LEFT 7
RIGHT © =I] В © RIGHT
я CONNECTION OF TAPE DECK TO RA-500
A-500
| TAPE DECK Aor/and B | [MC
REC Recording Inputs
r LEFT © EMP © LEFT 7
L RIGHT © El IT E ©) RIGHT
PLAY Playback Outputs
[Let O E {ЕЁ © Бест 7
RIGHT © {ЕЁ © RIGHT
— —— — = =, = : 4 = A =
CONTROL AMPLIFIER
CONNECTION TO RECEIVER OR CONTROL AMPLIFIER
LEFT SPEAKER
—
"SPEAKER SYSTEM —
RIGHT SPEAKER
RECORD PLAYER
To Reverberate Sound From Any Pro-
gram Source—Record Player, Tuner
or Microphone—Except 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 Off 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 ¡ts PLAYBACK or
ON position.
2. When recording from the tape deck À to
the tape deck B, turn the Tape Mode selector
to APB; when recording from the B to the A,
turn the selector to BPA.
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 Off button. If the Reverberation On
button 1s 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 1s 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.
HINTS ON USE/ SPECIFICATIONS / ACCESSORIES
Connections
Be sure to use shielded cable (four connecting
cords supplied) to connect a control amplifier
and tape decks to the RA-500. The use of an
ordinary twin leadwire may cause hum or
noise. Always check to see if the connecting
cords are plugged firmly and properly into their
corresponding output or input jacks. If the
connections are loose or in touch with other
parts, the RA-500 will not perform normally,
and may produce undesirable noise. If used in
such a way for a long time, it will eventually
break down.
A.C, Outlets
The two a.c. outlets on the rear panel are live
at all times and for plugging in a pair of tape
decks. They have a maximum capacity of 300
VA total. Never use them beyond their rated
capacity.
UNSWITCHED
TOTAL 300VA
MAXIMUM
Power Fuse
If the unit remains completely dead when the
power is switched on (the POWER indicator
fails to light), the power fuse is probably blown.
In this case, remove the line cord from its a.c.
outlet and replace the fuse after finding and
eliminating the trouble that caused the fuse
to blow. Use only an identical glass-tubed fuse.
For 100-117 volt operation, a 0.5 ampere fuse
is required. For 220-240 volt operation, a 0.3
ampere fuse should be used. Never attempt
to use a piece of wire or a fuse of a defferent
capacity as a substitute.
100-117V O.5A
220-240V O.3A
PR TE LR Ll RE Bi
(a
=
=
Е.
Grounding
Connect one end of vinyl or enameled wire to
the terminal screw marked GND on the rear of
the amplifier, attach a copper plate to the other
end and bury it underground. In all cases,
grounding is desirable since it allows a better
SN ratio to be obtained. To ground an entire
audio system, connect the grounding wire of
each component to this terminal.
UNDERGROUND
Voltage Adjustment
To reach the voltage selector, remove the two
screws from the nameplate on the rear panel
and then remove the nameplate. The voltage
selector makes it possible to operate the RA-
500 at the correct volt in any area. The volt
has been pre-adjusted at the factory, but can
be easily readjusted as follow:
1. Set the arrow on the voltage selector plug to
the required volt: 100, 117, 220 or 240 volts.
2. The power fuse should also be changed
whenever the a.c. line voltage is changed. For
100-117 volt operation, a 0.5 ampere fuse is
required. For 220-240 volt operation, the fuse
should be changed to a 0.3 ampere fuse.
Note: The voltage selector can be also used to
eliminate the trouble caused by the consider-
able voltaege fluctuation. In this case, it should
be set to the peak voltage.
TIE EA
EL 1
ls
N “—100V
Placement
Your RA-500 may be placed in any position
where 1t is convenient to reach. But we recom-
mend to place it away from the speakers be-
cause unnatural reverberation or booming noise
may be caused.
SPECIFICATIONS
RATED OUTPUT VOLTAGE:
300mY (at 1,000Hz Reverberation time minimum
input level 200mV)
MAXIMUM INPUT VOLTAGE:
3V (at 1,000Hz, Reverberation time minimum
HARMONIC DISTORTION:
Less than 0.2% (at 1,000Hz, Reverberation
time minimum output level 300mV)
FREQUENCY RESPONSE:
20 to 30,000Hz +2dB
(at Reverberation time minimum)
20 to 30,000Hz —10dB
(at Reverberation time maximum)
SIGNAL TO NOISE RATIO:
65dB (at output teve! 300mV)
REVERBERATION TIME;
1.9 to 3.2 second (at 1,000Hz)
INPUT IMPEDANCE:
greater than 200k ohms (at 1,000Hz)
INPUT AND OUTPUT JACKS:
INPUT
OUTPUT
TAPE RECORDING—A
TAPE RECQORDING—B
TAPE PLAY BACK—A
TAPE PLAY BACK—B
LOAD IMPEDANCE: 100k ohms
SWITCHES AND CONTROLS:
REVERBERATION MODE:
ON, OFF, RECORD
TAPE MODE:
REC/PLAY—B REC/PLAY—A
A—B DUBBING
B—A DUBBING
REVERBERATION TIME:
POWER REQUIREMENT:
POWER VOLTAGE: 100, 117, 220, 240V
50/60Hz
POWER CONSUMPTION: 10VA
SEMI CONDUCTORS: Transistors: 11 Diodes: 3
DIMENSIONS; 1157/64” (302mm) W,
63/8/(162mm) H,
107/15” (265mm)D
WEIGHT: 11.4 Ibs. (5.2kg)
ACCESSORIES
SCHEMATIC DIAGRAM BLOCK DIAGRAM/ DISASSEMBLY PROCEDURE /
DIAL CORD
BLOCK DIAGRAM a
| LOW FREQUENCY AMP
EE 6 BER a E 3 5 2 EB 2%
о В a © НЫ LAW ae E "EL LEFT TR501 TR503 TRs05
i aw Bn om EY won © . x 3 : ‚ REV AMP INPUTS: à
* BR OE E E S BB © 2 RO; ВОт 1 - —] E) REV AMP OUTPUT
à 8 8 3 2 я E ES ESE |
5 = © E E + 2 2 = FR = 3 a ik |
i 60019 90 90-00-00 [= [| |№о0ю оямея даме 5 — |
=: #1 —] e 4 5] tL | | TAPE B PLAYBACK Z2Z—0 ; | THe = a TE REVERBERA- | Crk ~ TAPE A RECORDING
[4 | | t= a EZ: TION |i
| | [= Mam = | =| | » = R507 TR508 | oe 8: »
‘Ea Г) a » . > ¥
= =| ue gan 1 т 1
n | | ! ha | w = Ï 2:
pill = Co i E | - || E IT I wi
| = | A + - = '
— =i ` Ч
—
RIGHT
REV AMP INPUT
: $ REV AMP OUTPUT
— — —
TAPE A PLAYBACK
Le
TAPE B PLAYBACKG-——o —
»
OD TAPE B RECORDING
+
TAPE A RECORDING
+
=,
AC 100V | '
117V TRst1 REVERBERATION
220V CIRCUIT ‚ UNIT
240V я
ı *[F-1232]
—— WOOD CASE
T Y=
iho
Lad
o
3 =
Le E
pe к о y
Же EE | La LA
D ; wl SS
TT af | РЕ =
- al Fa ъ— = — Бы — —
PT Ч Чего Её Ce tu tir !
mA > Eo Ae yl em ER E
ES TE I € E
= = ER! de
Bo 8 de oy Tr do RR Fay TRE O PO
| À? ve» - ЗАЗ LD LD
© а в | = 50
/ a E a % o_o |
BY Ys LDF i “ 1 == af
X E NE” | Moe :
a J + Е. У SN 3
$I _ Е = я I, т E]
i
! = An Y
So Fin E
_ ! a
г АК в o ,
| "462 BR |
! re. æ Co
MRE ELA 1 ~l
1 — + —
=“
|
1
JE ms, [és got | ON = Né — Е
| =||8 f ЗН — mm E — >. ic — .
= E si | Hoge JSF a © » y к „= |
2 - —_— — = | J 728 1 | a
Mor { TOT = y _
x | я =
Он Be i
34% £ © Nu
| = I
e “а СЕ г en
i =F Tye be o |
и | = t
+ w
© dev 5 Medea y DA có Tn x
5 Ea
ph Ene 0 FA 2 8 |
же Y E E = E
= + | uf
A ges ST т
113 No
Sn 5 x
S = Eu ©
© 8 Hy NI: o
e = a со I
+ © 53 4
1 E 2 — wy
AS. = =
= = + Sy
> = 3 E wg 1
== = J oO 5
= a =
Y | 58 À я S ©
ha =a 1 pt rE 4 =
== wi ‘ Jo
E | = |
TAL ©
OLIVE
PRINTED CIRCUIT BOARDS AND PARTS LIST
Abbreviations
CR : Carbon Resistor
MC : Mylar Capacitor
EC: Electrolytic Capacitor
CC : Ceramic Capacitor
OC : Oil Capacitor
W: Parts No. X: Parts Name Y: Stock No. Z: Position of Parts
W X Y / Z w X Y z
Rsot | 2.2k027 0101222 |2C Сю! | 0.154F 0601158 | 2C
+102 V MC,
R502 2.2kQ) 0101222 2C С со vl +10% 50 e 0601158 [8 С
К 503 470к © 0101474 2C C 503 а ИЕ 0510330 IC
Ко | 470k0 0101474 2C = я 6.3V EC. | 0510330 1C
R505 270k) 0101274 | 1C 504 33uF 0401307 125
Rses | 2700 0101274 |1C Csos 0.034) 40% 59 y mE
| C 02 0601307 2C
R507 | 56kM 0101563 | 1,2C 506 0.03 uF
Rsos | 56k0 | 0101563 2C С507 10 pF 25 V EC 0513100 2A
Rsoy | 82k) 7 0101823 2C C508 10 pF 0513100 28, C
R510 82k O 0101823 2C C509 100 uF Е 0510101 2A
Rs11 6.8k 0101682 1C Csio 100 uF 6.3V EC. 0510101 2B
R513 68k) 0101683 IC Cs? | 0.047 uf 10% 50 V MC. 0601477 28
R514 68k) 0101683 IC | EH La
R515 2.2kQ) 0101222 2B Cs13 3.3uf 0513337
Rsi7 | 68 O 0101683 2C C515 10 uF 0513100 1,28
Rsis | 680 0101683 |2 В C516 10 uf 0513100 28
Rsi9 + 820k0 0101824 1,28 Cs7 | 0.03uF +10% 50 V MC. | 0601307 IC
R520 820k O 0101824 2C С518 10 uf VE 0513100 1B
R521 5600 0101561 2A Cs19 | 10 uF 25 С. 0513100 |1С
Ro? | 5600 0101561 128 Cs20 150pF +10% 50 V CC. | 0660151 18
К523 2.20 0101222 28 Con 47 pF 0513470 1 A, B
R524 2.210 0101222 |2 В 25 V EC. a
R525 39k) 0101393 1,28 C522 47 pF 0513470
R 527 6.80 0101682 | 2 A Cs24 | 0.0022uF 0652222 | A
В52 0101682 |2 В Cs25 330 uF 0515331 | 1,
Ress Coal £10% MW CR. o 0515101 |2 A
529 120k0 0101124 | ЗА С526 100 uF 50 V EC.
R530 120k) 0101124 | 2B Cs27 47 uf 0515470 |1,2A
RS31 | 5600 0101564 [2 A Css 0.04uF T1009 50 М СС. | 0650403 TA
R532 560k 0 0101564 12 В
К 533 22k 0 0101222 2A
Rs34 | 2.2102 0101222 1,28 Ds01 oN Varistor 0340030 | TA
R535 6.8kQ) 0101682 2A D 502 DS-40 0340030 18
R536 6.8 0 0101682 1,2B Dso3 10DC-1(N) 0310680 1A
R537 3.310 0101332 2C
R 538 3.3k N | 0101332 2C TRs01 0305470,1 2C
R539 39.0 0101393 ZA TR502 0305470,1 2C
R540 39k} 0101393 | 2 В ТВ 503 03054701 2 В
R542 68k) 0101683 IC ТВ 505 0305470 1 2 A
R543 220k) 0101224 18
28
R 544 1.80 0101182 |1C Toe 0305470.1 в
В 545 6.8k0 0101682 |18 507 | 25C536 (E) 0305150
R 546 3.3kQ 0101332 |1B, C ТВ 508 25C872 (D, E) 0305470,1| 1 В
К 547 6.8 Q 0101682 |1B, C TRs09 | 8001 (А, В, С) 0305660, 1,2| 1 В
R548 68k) 0101683 [1B TRs10 | 9001 (A, B, C) 0300200. 1,2| | B
R549 1800 0101181 |1B, C TRs11 | 25C971 (3) 0305530 | 1 A
R 550 2.7402 0101272 |1A
R551 1kQ 0161102 | ТА
R552 150) 0101150 | 1 В
В 553 150 0101150 | 1 В
К554 220 0101220 1A
R555 22k 0 0101223 | ТА
Rssé | 1000, 0101101 |TA
— MW ==
MODE SWITCH BLOCK<F-1263-5>
W X Y
Cool 0.06uF 10% 50 V MC. 0601607
S1~3 Reverberation Mode Switch 1130410
— 12 —
OTHER PARTS AND THEIR POSITION ON CHASSIS
W: Parts No. X: Parts Name Y: Stock No.
OTHER PARTS
w X Y
Cool 0.033 uF 0591337
Coo2 oot] 6007 OC. 0591476
VRoo1, 002 | 50k)(B)x2 1010530
PLoo1 8V 0.15A 0400120
PLoo2 0420020
PLoo3 6.3V 0.25A Fuse Type 0420020
PLoos 0420020
Рост 0.3A (220~240V) 0430450
0.5A (100~117V) 0430012
P Uoo1
Coo2
ГОО
C0001
CO002
P Too1
W X Y
$001 Power Switch 1130160
S4(avf) | Tape Mode Switch 1102270
КЕ\У 001 Reverberation Unit 4350010
PToo1 Power Transformer 4000690
P Uco Voltage Selector 2410080
2410090
CO001 2450011
CO002 AC Outlet 2450011
VRoo1
VRoc2
Sa
(a—f)
* Manufacturer reserves right to change design and/or specifica-
tions without notice for purpose of improvement.
— ie
SANSUI ELECTRIC COMPANY LIMITED
Head Office; 14-1, 2-chome, Izumi, Suginami-ku, Tokyo, Japan. TEL. 323-1111
Printed in Jopan (N1440M4)
">
