Technics SU-A900 User manual

Technics
Stereo Integrated Amplifier
SU-A900
SU-A800
Operating Instructions

Dear Customer
Thank you for purchasing this product.
For optimum performance and safety, please read
these instructions carefully.
These operating instructions are applicable to models SU-A900 and SU-A800.
Contents
© Accessories ....... cece cee eens 2 e Remote Control Transmitter.............. 1i
¢ Caution for AC mains lead e Remote Control Operation................ 12
(For
United
Kingdom).
................
000000
3
©
Suggestions
for
Safety...................
14
e
Connections
.....................
cece
ee
4
©
Technical
Specifications
.................
15
e
Front
Panel
Controls and
Functions
...... 7
e
Maintenance.......................000
eee
15
e
Listening
to
Sound.......................
8
©
Troubleshooting
Guide
.........
Back
cover
©
Recording
.............
cece
cece
eee
10
For areas except United Kingdom, Europe, Australia and N.Z.
CAUTION: :
The AC voltage differs according to the area.
Be sure to set the proper voltage in your area before use.
(For details, please refer to page 5.)
e AC power supply cord
(For United Kingdom) (For Australia and N.Z.)
* Batteries
© Power plug adaptor
(Not supplied for United Kingdom, Europe, Australia and
N.Z.)

Caution for AC mains lead
(For United Kingdom)
(“EB" area code model only)
For your safety, please read the following text care-
fully.
This appliance is supplied with a moulded three pin
mains plug for your safety and convenience.
A5-ampere fuse is fitted in this plug.
Should the fuse need to be replaced please ensure
that the replacement fuse has a rating of 5-ampere
and that it is approved by ASTA or BSI to BS 1362.
Check for the ASTA mark @ or the BSI mark Y on
the body of the fuse.
If the plug contains a removable fuse cover you must
ensure that it is refitted when the fuse is replaced.
if you lose the fuse cover the plug must not be used
until a replacement cover is obtained.
A replacement fuse cover can be purchased from
your local dealer.
CAUTION!
IF THE FITTED MOULDED PLUG !S UN-
SUITABLE FOR THE SOCKET OUTLET IN
YOUR HOME THEN THE FUSE SHOULD BE
REMOVED AND THE PLUG CUT OFF AND
DISPOSED OF SAFELY.
THERE IS A DANGER OF SEVERE ELEC-
TRICAL SHOCK IF THE CUT OFF PLUG IS
INSERTED INTO ANY 13-AMPERE SOCKET.
If a new plug is to be fitted please observe the wiring
code as shown below.
If in any doubt please consult a qualified electrician.
IMPORTANT
The wires in this mains lead are coloured in accor-
dance with the following code:
Blue: Neutral
Brown: Live
As the colours of the wires in the mains lead of this
appliance may not correspond with the coloured
markings identifying the terminals in your plug, pro-
ceed as follows:
The wire which is coloured BLUE must be connected
to the terminal in the plug which is marked with the
- letter N or coloured BLACK.
The wire which is coloured BROWN must be con-
nected to the terminal in the plug which is marked with
the letter L or coloured RED.
Under no circumstances should either of these wires
be connected to the earth terminal of the three pin
plug, marked with the letter E or the Earth Symbol
L
Before use
Remove the connector cover as follows.
How to replace the fuse
1. Remove the fuse cover with a screwdriver.

Connections
To connect to each terminal
Make connections to each component in the system by using
stereo connection cables (not included).
Stereo connection cable White (L)
Red (R)
GOO O=
® “PHONO” terminals
Connect to a turntable.
GND
DO Turntable (not included)
® U
M “GND” terminal
This terminal is for use with a turntable which has a ground wire.
“TUNER” terminals
Connect to a tuner.
Tuner (not included)
SPEAKERS
Cooling fan
(See page 5.)
©Cep" terminals)
Connect to a compact disc player.
© Compact disc player (not included)
e OUT
D Q
GS ~ AU =
©) “AUX” terminals
Connect to a component such as a video disc player (audio only
connectable), etc.
Video disc player (not included)
AUDIO OUT
9 Ọ
LJ

Æ “TAPE 2” terminals
Connect to a second tape deck (Tape deck 2) or a graphic
equalizer, etc.
Tape deck 2 (not included)
REC(IN) PLAY(OUT}
œŒ Q
© C “TAPE 1” terminals
Connect to a first tape deck (Tape deck 1) or a digital compact
cassette deck (DCC), atc.
Tape deck 1 (not included)
@ (“REMOTE CONTROL OUT” terminal
This terminal can be used only with Technics tape deck and com-
pact disc player which have the appropriate remote control ter-
minal. (Consult your dealer for details.)
Proper connection with remote control connection cables will
allow control of some functions from this unit’s remote control
transmitter. (See pages 12—13 for details.)
Connect to a tape deck and/or compact disc player as shown
below,
If a tape deck is not being used, the compact disc player can be
connected directly (dotted line).
This unit
REMOTE
@ CONTROL
OUT
Connection cable
for remote control
(included with tape
deck)
Tape deck
(not included)
REMOTE
Q CONTROL
;
2 =
Connection cable
for remote control
(Included with
compact disc
r=-
Compact disc
player A
(not included) REMOTE =
For a compact disc player with a remote control sensor, the
above connection is not necessary.
To set the power voltage
For areas except United Kingdom, Europe, Australla and
N.Z.
CoE,
CODCOD
Set the voltage selector to "110 V—127 V" or “220 V-240 V"
according to the area in which the unit will be used.
{Use a minus (—) screwdriver]
Note:
Note that this unit will be seriously damaged if this setting is not
made correctly.
There is no cooling fan for some countries.
The coofing fan operates at high power output levels only.

CONNECTIONS n.s
One pair of speakers can be connected to the “A” terminals of
this unit and one pair to the “B” terminals, or only one pair of bi-
wired speakers can be connected to ail terminals.
To connect main and/or second speakers
Main (A) speakers
(not Included)
(right)
Second (B) speakers
(not Included)
Hi Load Impedance
© When only the “A” or only the “B” terminals are used: 4—16
ohms
When both the “A” and the “B” terminals are used
simultaneously: 8—16 ohms
To connect bi-wired speakers (not included)
Note: Connect only bi-wired speakers in this way.
@ Load impedance
When bi-wired speakers are used: 4-16 ohms
E Bi-wiring
The treble range and the bass range of the speakers are con-
nected to the speaker terminals of the amplifier by using two
speaker connection cords separately for each.
As a result of making connections in this way, sound can be
reproduced with much greater nuance and detail, with the feel-
ings of alr oscillation and deepness of sound provided by an input
source that suppresses reciprocal band-range Interference.
(Refer to the operating instructions of the speakers.)
To connect cords to terminals
© Strip off the outer ©
covering, and twist the —- — et m
center conductor. 10 mm Twist
@
Turn
completely
tothe
®©
®
left.
sy
Ps)
insert the wire and turn completely to the right. Pull the
cord to assure a proper connection.
Note: Be sure to only connect positive (+) cards to
positive (+) terminals, and negative (—) cords to
negative (—) terminals.
Note:
To prevent damage to circuitry, never
short-circuit the positive (+) and negative
When using banana plugs
(—) speaker wires.
e 8
Use with the speaker terminal OOS
knob tightened completely. e
Pf fy en plug
(not included)
To connect the AC power supply cord
(Included)
FOR UNITED KINGDOM ONLY
BE SURE TO READ THE CAUTION FOR THE
AC POWER SUPPLY CORD ON PAGE 3
BEFORE CONNECTING THE AC POWER
SUPPLY CORD.
For United Kingdom only
Connect the AC power supply cord (included) after all other
cables and cords are connected.
AC power supply cord
a (inctuded)
COOGOs
{For areas except Australia and N.Z.)
Insertion of Connector
Even when the connector Is perfectly
Inserted, depending on the type of in-
let used, the front part of the connec-
tor may jut out as shown in the draw-
Household
AC outlet
Connector
ing.
R
However
there
is
no
problem
using
the
‘Approx.
6mm
unit.
‘Appliance
inlet
Note:
The configuration of the AC power supply cord differs according
to area.
Not supplied for United Kingdom, Europe,
Australia and N.Z.
If the power piug will not fit your socket, use the power plug
adaptor (included).
=E

Front
Panel
Controls
and
Functions
[1] Power “STANDBY () ION" switch
(POWER, m STANDBY Ò = ON) |
Press to switch the unit from on to standby mode or vice ver-
sa, In standby mode, the unit is still consuming a small
amount of power,
[2] Operation indicators
(AMPLIFIER OPERATION MONITOR)
These indicators illuminate to indicate the operating condi-
tion of this unit.
VOLTAGE CONTROL:
When the power is switched ON, this indicator illuminates
when the unit is in the operating condition.
CURRENT DRIVE:
When the power is switched ON, this indicator illuminates
after about 4 seconds when the unit is in the operating condi-
tion.
If an abnormat condition in the circuitry is detected, such as
DC voltage appearing in the output or a short-circuit of the
positive (+) and negative (—) wires from the speaker ter-
minals, the protection circuit functions and this indicator will
not illuminate.
[3] Tone control button (TONE)
This switch is used to set the tone control circuit (bass, tre-
ble) to ON or DEFEAT.
[4] Volume control (VOLUME)
[5] Tape-monitor button/indicators
(TAPE MONITOR)
This button is used to monitor the recorded sound during
recording.
TAPE 1
Set to this position to monitor the sound from the equipment
connected to the “TAPE 1” terminals.
TAPE 2
Set to this position to monitor the sound from the equipment
connected to the “TAPE 2” terminals.
SOURCE
Set to this position to tisten to a phono disc, radio broadcast,
compact disc, etc.
(See pages 8 and 10.)
To open the
panel cover
+
l
l
om oren t
I
L]
L]
|
eS ee er G
Remote
control
signal
receptor
(SENSOR)
Receives
the
signals
from
the
remote
control.
[7] Headphones Jack (PHONES)
(See page 9.)
Speaker select buttons/indicators
(SPEAKERS)
These select buttons are used to select the speakers to be
used, (See page 8.)
Tone controls (BASS/TREBLE)
The bass control Is used to adjust the low-frequency sound
tange, and the treble contro! is used to adjust the high-
frequency sound range.
Balance control (BALANCE)
This control is used to adjust the left/right volume balance.
[11] Input selectors/indicators
(INPUT SELECTOR)
These
selectors
are
used
to
select
the
sound
source
to
be
heard, such as a disc, radio broadcast, etc.
The
input
source
can
be
selected
either
by
sequentially
changing the selection or by direct selection. (See page 8.)
[12] Phono cartridge selector
(PHONO SELECTOR)
This selector should be set to the position which cor-
responds to the type of cartridge used on the turntable.

2
3
1745
Speaker indicators
Set the volume control to the “MIN” posi-
tion.
2 Switch ON the power.
Select the speaker system to be used.
The corresponding Indicator(s) above will Illuminate to
Indicate which speaker system Is selected.
A:
Sound
can
be
heard
from
the
speakers
connected
to
the
“A” terminals,
B: Sound can be heard from the speakers connected to the
“B" terminals.
A and B: Sound can be heard simultaneously from the
speakers connected to the “A” terminals and
the “B” terminals. Or, if bi-wired speakers are
connected, sound can be heard from them.
off: No sound will be heard from the speakers.
(Both indicators will turn off.)
Press the tape monitor button so that the
“SOURCE?” indicator illuminates.
Notes:
When a graphic equalizer connected to the “TAPE 1" or
“TAPE 2” terminals is used, set the selector to the “TAPE
1" or “TAPE 2" position.
Tape monitor
indicators
Input selector indicators
Press
one
of
the
input
selectors
to
select
uJ the sound source.
(o)
:
Each
time
the
button
is
pressed,
the
illuminated
posl-
<
tion
of
the
input
selector
indicator
will
shift
one
posi-
tion
to
the
left.
©
:
Each
time
the
button
is
pressed,
the
illuminated
posi-
»
tion
of
the
Input
selector
indicator
will
shift
one
posi-
tion
to
the
right.
To
directly
select
the
Input
source
The
desired
input
source
can
be
selected
directly
by
using
the
input
selector
buttons
(@
)
located
Inside
the
panel.
TAPE
1:
Set
to
this
position
to
listen
to
equipment
con-
nected
to
the
“TAPE
1"
terminals.
TAPE
2:
Set
to
this,
position
to
listen
to
equipment
con-
nected
to
the
“TAPE
2"
terminals.
AUX:
Set
to
this
position
to
listen
to
equipment
connected
to
the
“AUX”
terminals.
CD:
Set
to
this
position
to
listen
to
compact
discs.
TUNER:
Set
to
this
position
to
listen
to
radio
broadcasts.
PHONO:
Set
to
this
position
to
listen
to
phono
discs.
Then,
set
the
phono
cartridge
selector
to the
posi-
tion
which
corresponds
to
the
type
of
cartridge
us-
ed
on
the
turntable.
(Refer
to
“PHONO
SELEC-
TOR”
on
page
9.)
Begin operation of the components to be
used.
Refer to the operating instructions of each component.
Adjust the volume level.
Turn the volume control to the desired level.
| To open the a
panel cover I
pee t
t
l
I
l
Lo SS A, 4
t

snes, nase STRELE (BALANCE
eo 0 D Q
i
Pro Pete et aC}
To adjust the left/right sound balance -
BALANCE
Adjust the balance control.
To adjust the tone qualit
TONE
Press the tone control switch inward to the
“ON” position If you want to adjust the bass or
treble tone quality.
If set to the “DEFEAT” position, tone controls have no effect, and
frequency response becomes flat.
[BASS]
Adjust the low-frequency sound to the desired
tone quality.
TREBLE
Adjust the high-frequency sound to the desired
tone quality.
When listening phono discs
PHONO SELECTOR
Select the cartridge type.
MM:
Set to this position when using a moving-magnet type cartridge or
high-output moving-coil cartridge (1 mV or more).
MC:
Set to this position when using a moving-coil type cartridge.
PHONO SELECTOR
While listening through headphones
Speaker selectors
Headphones (not included)
© Reduce the volume tevel before connecting headphones.
e If the sound from the speakers is not wanted, set the speaker
selectors to the “off” position.
Avoid listening for prolonged periods of time to prevent hearing
damage.
After listening Is finished
Use the volume control to reduce the volume level and switch
OFF the power of each unit.

Recording
To record from compact discs, etc.
Set the tape-monitor button to the
“SOURCE?” position.
Select the program source to be recorded.
AUX: Set to this position to record from equipment con-
nected to the “AUX” terminals.
CD: Set to this position to record from compact discs.
TUNER: Set to this position to record from radio broad-
casts,
PHONO: Set to this position to record from phono discs.
Prepare the tape deck for recording.
(Refer to the operating instructions for the tape deck for
detailed adjustment of the recording level, etc.)
A ster recording, and play back the source.
Tape-to-tape recording
Tape-to-tape recordings can be made if two regular tape decks,
or one regular tape deck and a digital compact cassette deck
(DCC), are connected to the rear panel of this unit.
Note:
Tape deck 1 (first tape deck) is the tape deck connected to the
“TAPE 1” terminals.
Tape deck 2 (second tape deck) Is the tape deck connected to
the “TAPE 2” terminals.
( To record from tape deck 2 to 1 )
Set the tape-monitor button to the
“SOURCE” position.
2 Press the “TAPE 2” button.
Start tape deck 1 for recording and tape
deck 2 for playback.
( To record from tape deck 1 to 2
Set the tape-monitor button to the
“SOURCE?” position.
D Press the “TAPE 1” button.
Start tape deck 2 for recording and tape
deck 1 for playback.
E To directly select the source for recording
The desired source can be selected directly by using the input
selector buttons ( @ ©) ) located inside the panel.
E To check the sound recorded
With a tape deck with 3 heads, It is possible to check the sound
recorded on the tape.
Set the tape monitor to “TAPE 1” or “TAPE 2” and the
monitor switch on the tape deck to “TAPE.”
TAPE 1: when recording on tape deck 1 (first tape deck)
TAPE 2: when recording on tape deck 2 (second tape deck)