Technics SU-A700 User manual

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this unit.'please read these instructions completely
Technics
Stereo Integrated Amplifier
SU-A700
SU-A600
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-A700 and SU-A600.
These operating instructions, however, fundamentally explain the operation of model SU-A700.
Contents
• Accessories. 2
• Caution for AC mains lead
{For United Kingdom). 3
• Connections. 4
• Front Panel Controls and Functions. 7
• Listening to Sound. 8
• Recording.10
• Remote Contro l Transmitter
feiftwnmniM.11
Remote Control Operation
Itoi'&MftSim . 1 2
Suggestions for Safety.14
Technical Specifications.15
Maintenance.15
Troubleshooting Guide. Back cover
-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.)
Accessories
• AC power supply cord. 1
(For United Kingdom) (For Australia and N.Z.)
(For others)
• Remote control tran smitter (EUR642210).1
GBBB
• Batteries..2
masESEsm
n=re nzra
• Power plug adaptor. 1
(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.
A 5-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 BS1362.
Check for the ASTA mark <Q> or the BSI mark ^ 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 IS 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
Before use
Remove the connector cover as follows.
M
TYf
-4-- Connector
JJ cover
How to replace the fuse
1. Remove the fuse cover with a screwdriver.
A
^ Fuse cover
2. Replace the fuse and attach the fuse cover.

Connections
To connect to each terminal
Make connections to each component in the
stereo connection cables {not included).
■ “GND” terminal
This terminal is for use with a turntable which has a ground wire.
“TUNER” terminals
Connect to a tuner.
®
Connect to a component such as a video disc player (audio only
connectable), etc.
Video disc player (not included)

(E) ( “TAPE 2” terminals )
Connect to a second tape deck (Tape deck 2) or a graphic
equalizer, etc.
TAPE 2
REC PLAY
(OUT) (IN)
0
a
1
R) (l
u
4
(R) (L)
u
Tape deck 2 (not included)
REC(IN)
„ la
PLAY
H
OUT)
1 - 1 (R)(L
)(R)<
li
4 J
(F) ( ~ "TAPE 1” terminals )
Connect to a first tape deck (Tape deck 1) or a digital compact
cassette deck (DCC), etc.
@( “REMOTE CONTROL OUT” terminals ~)
^rraroiirniFW
These terminals can be used only with Technics tape deck and
compact disc player which have the appropriate remote control
terminal. (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
a
REMOTE
CONTROL
OUT
Tape deck
(not Included)
Compact disc
player
(not included)
H
H
■
i
■ » 11 1 mmi
B
■
MHl
m
Connection cable
Note:
For a compact disc player with a remote control sensor, the
above connection is not necessary.
To set the power voltage SMEEEBS
For areas except United Kingdom, Europe, Australia and
N.Z.
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]
| About the cooling fan _
The cooling fan operates at high power output levels only.
(There is no cooling fan for some countries.)
Note:
Note that this unit will be seriously damaged If this setting is not
made correctly.

Connections
(continued)
To connect to speakers _
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 all terminals.
C To connect main and/or second speakers ~)
(not Included)
■ 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
■ Bl-wirlng
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 air 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 ssssssmm 4 -
center conductor. 10 mrn Twist
( 2 ) Turn completely to the
left.
(D Insert the wire and turn completely to the right. Pul! the
cord to assure a proper connection.
Note: Be sure to only connect positive (+) cords to
positive (+) terminals, and negative (—) cords to
negative (-) terminals.
Note:
To prevent damage to circuitry, never
short-circuit the positive (+) and negative
(-) speaker wires.
-For United Kingdom only
When using banana plugs
Use with the speaker terminal
knob tightened completely.
£—Banana 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.
Connect the AC power supply cord (included) after all other
cables and cords are connected.
AC power supply cord
(included)
(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¬
ing.
However there Is no problem using the
unit.
jL
Household
AC outlet
Connector
Approx. 6mm
'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 plug will not fit your socket, use the power plug
adaptor (included).

Front Panel Controls and Functions
[0 Power “STANDBY 6 /ON” switch
(POWER, a STANDBY d) m 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 abnormal 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.
GO Volume control (VOLUME)
E 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 listen to a phono disc, radio broadcast,
compact disc, etc.
(See pages 8 and 10.)
[si
Remote control signal receptor (SENSOR)
Receives the signals from the remote control.
E Headphones jack (PHONES)
(See page 9.)
E Speaker select buttons/indicators
(SPEAKERS)
These select buttons are used to select the speakers to be
used. (See page 8.)
UO Tone controls (BASS/TREBLE)
The bass control is used to adjust the low-frequency sound
range, and the treble control is used to adjust the high-
frequency sound range.
E Balance control (BALANCE)
This control Is used to adjust the left/right volume balance.
m Tone control button (TONE)
This switch is used to set the tone control circuit (bass, tre¬
ble) to ON or DEFEAT.
10 ] ,n P ut selectors/indicators
These selectors are used to select the sound source to be
heard, such as a disc, radio broadcast, etc. (See page 8.)

Listening to Sound
I S et the volume control to the “MIN” posi¬
tion.
2 Switch ON the power.
3 S elect the speaker system to be used.
The corresponding Indicator above will Illuminate to In¬
dicate 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.)
4 P ress 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.
5 S elect the sound source.
TAPE 1: Press this button to listen to equipment connected
to the "TAPE 1 ” terminals.
TAPE 2: Press this button to listen to equipment connected
to the “TAPE 2" terminals.
AUX: Press this button to listen to equipment connected to
the “AUX" terminals.
CD: Press this button to listen to compact discs.
TUNER: Press this button to listen to radio broadcasts.
PHONO: Press this button to listen to phono discs.
6 B egin 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.

| While listening to music
| BALANCE |
Adjust the balance for the left/right volume.
( To adjust the tone quality )
[TONE I
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.
I BASS 1
Adjust the tow-frequency sound to the desired
tone quality.
[TREBLE]
Adjust the high-frequency sound to the desired
tone quality.
| While listening through headphones
• Reduce the volume level before connecting headphones.
• 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
Tape n
II
r
monitor ^
l
WI1 wit toun
O o o
J
o o
o Q
o o
□
□
AUX
hJ
tUMEH
««NO
SU-A700
2
SU-A700
1 To record from compact discs, etc.
I S et the tape-monitor button to the
“SOURCE” position.
2 Select the program source to be recorded.
AUX: Press this button to record from equipment con¬
nected to the ‘‘AUX" terminals.
CD: Press this button to record from compact discs.
TUNER: Press this button to record from radio broadcasts.
PHONO: Press this button to record from phono discs.
3 Prepare the tape deck for recording.
(Refer to the operating instructions for the tape deck for
detailed adjustment of the recording level, etc.)
Start 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 pane! 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.
^j) 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
I S et the tape-monitor button to the
“SOURCE” position.
2 Pr ®ss ^e “TAPE 1” button.
3 Start tape deck 2 for recording and tape
deck 1 for playback.
Set the tape monitor to “TAPE t" or “TAPE 2" and the
monitor switch on the tape deck to “TAPE"
■ To check the sound recorded
With a tape deck with 3 heads, it is possible to check the sound
recorded on the tape.
TAPE 1: when recording on tape deck 1 (first tape deck)
TAPE 2: when recording on tape deck 2 (second tape deck)

Remote Control Transmitter
SU-A700 only
Insertion of remote control transmitter batteries
1. Open the cover.
2. Insert the batteries.
• Be sure to insert according to the
(+) and (-) Indications in the
battery compartment.
• Use two UM-4, "AAA” R03 (1.5 V)
size batteries. /
3. Close the cover.
■ Battery life
Battery life is about one year. (Battery life
may vary depending upon the frequency of
use and other conditions of use.)
The batteries should be replaced If the unit
cannot be operated even when the remote
control transmitter Is brought close to the
unit.
■ Battery notes
• Be sure that batteries are inserted so that
they are placed correctly with respect to
the (+) and (-*) indications in the battery
compartment. If the batteries are not In¬
serted correctly, they may leak and
damage the remote control transmitter.
• Do not use rechargeable (nickel-cadmium)
type batteries.
• Do not mix old and new batteries, or bat¬
teries of different types (such as carbon
and alkaline.)
• If the remote control transmitter is not to be
used for a long period of time, take out the
batteries and store them in a cool, dark
place.
• Remove and dispose of worn-out batteries.
• Never attempt to recharge or short-circuit
the batteries, and do not disassemble them
or expose them to excessive heat or throw
them Into a fire.
• If a battery leaks, remove both batteries
and dispose of them, and then thoroughly
clean the battery compartment before in¬
serting new batteries.
Remote control transmitter operation notes
Face about 7 meters In front of
the sensor.
(This actual range will depend on the
angle at which the remote control is
used.)
©©•© e&esfi
A
30°
V
m \
13CT
i
Be sure the transmitter part of the remote control
transmitter and the receptor part of this unit are
free from dust.
Excessive dust might prevent reception.
^§@© ■ 0 Aeeaa
Avoid dust
Avoid dust
-Other notes-
1. Do not expose the receptor (on this unit) 2.
to direct sunlight or other strong light,
because to do so might result in Incorrect
operation.
Do not use a remote control transmitter 3.
for a TV set, a VCR or other video compo¬
nent at the same time as this remote con¬
trol transmitter is being used, because to
do so might result in Incorrect operation.
If this unit Is installed in a rack with glass
doors, the glass door’s thickhess or color
might make it necessary to use the
remote control transmitter a shorter
distance from the unit.
11

Remote Control Operation
SU-A700 only
• This remote control transmitter can be used to operate CD
players and tape decks which are equipped with remote control
terminals or remote control sensors, or to operate tuners which
are equipped with remote control sensors.
Consult your dealer for details.
• For detailed information concerning operation steps, etc.,
please refer to the appropriate page for each unit and the
respective operating instructions.
• Make sure that the power of each unit is set to the "ON” posi¬
tion before beginning the operations.
NOTE:
Face this remote control transmitter toward the main unit to
operate the main unit or other units which are connected to
the main unit by means of a remote control cable (See page
5).
To operate any other unit, face this remote control transmitter
toward that unit.
To operate the amplifier
To select an input source
AUX CO TUNER PHONO
o o o o
TAPE 1 TAPE 2
o o
To adjust the volume level
VOLUME +
CUD
To listen to radio broadcasts
To select the desired channel sequentialy
S' /\
PRESET O CD
Select the desired
preset channel.
To select the desired channel directly
i wen
O *
2
o
3
0
4
o
6
0
7
0
6
o
0
O 5
Specify the preset channel
Example: Channel 12
. i’O 1 2
lO « ► O *OJ
To select the desired band
TUNER
o *
txsc/BAND The band changes
each time the
button is pressed.
12

To listen to compact discs
To start play
►
O
To start play from the desired track
TUNER , -Q-
PRE3ET Q Q
2 3 4
o o o o
s a 7 8
o o o o
9 0 £10 01SC/BAN
o o o o
66^6
oj|°S' s 6 o
II ■ DECK ^ ►
oooo
AUX CD - TUNER PRO NO'
oooo
TAPE1 TAPE 2
\D O
4 3 4
OOOO
sere
* OOOO
' 9 o >10
O O O
Select the desired
track number.
Example: track 12
2<0 1 2
lo*o*o
— ► F or CD changer
Select the desired disc by pressing
“DISC/BAND" and then appropriate
numeric button
To stop play
To stop play
temporarily
To skip a track
Press t0 resume play.
<5(5
To listen to tapes _
deck va 0nly when us,ng 9 double cassette deck 4
O Se,ect the ta P® deck (DECK 1 or DECK 2). ^ O O
(Reverse) (Forward)
The remote control Indicator of the cassette deck is changed
over each time the button Is pressed.
To stop play
To stop play
temporarily
4 ►
Press C ) CD 10 resume play.
To fast-forward or
rewind the tape o o
13

Suggestions for Safety
■ Use a standard AC wail outlet
1. Use of an AC power source of high voltage, such as for an
air conditioner, is very dangerous.
There Is the possibility that a fire might be caused by making
such a connection.
2. A DC power source cannot be used.
Be sure to check the power source carefully, especially on a
ship or other place where DC is used.
■ Grasp the plug when disconnecting the power
supply cord
1. Wet hands ere dangerous.
A dangerous electric shock may result if the plug is touched
by wet hands.
2. Never piece heavy items on top of the power euppiy cord,
and never force it to bend sharply.
■ Place the unit where it will be well ventilated
Place this unit at least 10 cm (4") away from wall surfaces, etc.
Be careful that curtains and similar materials do not obstruct the
ventilation holes.
■ Avoid places such as the following:
In direct sunlight or in other places where the temperature is
high.
In places where there Is excessive vibration or humidity.
Such conditions might damage the cabinet and/or other compo¬
nent parts and thereby shorten the unit’s service life.
■ Be sure to place the unit on a flat, level sur¬
face.
If the surface Is inclined, a malfunction may result.
■ Take particular care If children are present
Never permit children to put anything, especially metal, Inside
this unit. A serious electric shock or malfunction could occur If
articles such as coins, needles, screwdrivers, etc. are inserted
through the ventilation holes, etc. of this unit.
■ If water is spilled on the unit
Be extremely careful if water Is spilled on the unit, because a fire
or serious electric shock might occur. Immediately disconnect
the power cord plug, and consult with your dealer.
■ Avoid spray-type Insecticides
Insecticides might cause cracks or “cloudiness" In the cabinet
and plastic parts of this unit. The gas used in such sprays might,
moreover, be ignited suddenly.
■ Never use alcohol or paint thinner
These and similar chemicals should never be used, because they
might cause flaking or cloudiness of the cabinet finish.
■ Disconnect the power supply cord If the unit
will not be used for a long time
If the unit Is left for a long time with the power ON, this will not
only shorten its useful operation life, but may also cause other
troubles.
■ Never attempt to repair or reconstruct this
unit
A serious electric shock might occur if this unit is repaired,
disassembled or reconstructed by unauthorized persons, or if the
internal parts are accidentally touched.
■ if trouble occurs
If, during operation, the sound is interrupted or Indicators no
longer Illuminate, or if abnormal odor or smoke Is detected, Im¬
mediately disconnect the power cord plug, and contact your
dealer or an Authorized Service Center.
14

Technical Specifications (DIN 45 500)
20 Hz-20 kHz continuous power output
both channels driven [SU-A700]: 2 x 45 W (8 ft)
[SU-A600]: 2 x 40 W (8 ft)
1 kHz continuous power output
both channels driven (THD: 1%)
[SU-A700]: 2x55 W (8 ft)
2x80 W {4 ft)
[SU-A600]: 2 x 50 W {8 ft)
2x70 W (4 ft)
63 Hz-12.5 kHz continuous power output
both channels driven (THD: 0.7%)
[SU-A700]: 2 x 50 W (8 ft)
2x70 W {4 ft)
[SU-A600] : 2x45 W (8 ft)
2x65 W {4 ft)
Total harmonic distortion
rated power at 20 Hz-20 kHz
Intermodulation distortion (50 Hz: 7 kHz=4:1,
rated power
Residual hum and noise
Damping factor
Headphones output level/impedance
Load Impedance
A or B, BI-WIRING
A and B
Input sensitivity/impedance
PHONO MM
TUNER, CD, AUX, TAPE 1, TAPE 2
0.01 % (8 ft )
SMPTE)
0.007% (8 ft)
1 mV
60 (8 ft)
30 (4 ft)
540 mV/47 ft
4 ft—16 ft
8 0—16 ft
2.5 mV/47 kft
150 mV/22 kft
Phono maximum input voltage (1 kHz, RMS)
MM 150 mV (150 mV. IHF ' 66 )
S/N (rated power, 4 ft)
PHONO MM 76 dB (78 dB, IHF ’ 66 )
TUNER, CD, AUX, TAPE 1, TAPE 2 91 d 8 (99 dB. IHF * 66 )
S/N at -26 dB power (4 ft)
PHONO MM 68 dB
TUNER, CD, AUX, TAPE 1, TAPE 2 70 dB
S/N at 50 mW power (4 ft)
PHONO MM 64 dB
TUNER, CD, AUX, TAPE 1, TAPE 2 64 dB
Frequency response
PHONO MM RIAA standard curve ±1 dB
(30 Hz-15 kHz)
TUNER, CD, AUX, TAPE 1, TAPE 2
3 Hz-80 kHz(+0, —3 dB)
+0 dB. -0.3 dB (20 Hz-20 kHz)
Tone controls
BASS 50 Hz,+10 to - 10 dB
TREBLE 20 kHz, +10 to -10 dB
Output voltage
TAPE 1, TAPE 2 REC OUT 150 mV
Channel balance (AUX 250 Hz- 6.3 kHz) ±1 dB
Channel separation (AUX 1 kHz) 50 dB
■ GENERAL
Power consumption 200 W
Power supply
For Europe 50 Hz/60 Hz AC, 230 V
For United Kingdom, Australia and N.Z.
50 HZ/60 Hz AC, 230 V-240 V
For others 50 Hz/60 Hz AC, 110 V -127 V/220 V-240 V
Dimensions (W x H x D) 430x125x318 mm
weight .• [SU-A700]: 8.4 kg
[SU-A600]: 6.2 kg
Notes:
1 . Specifications are subject to change without notice.
Weight and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
For United Kingdom only
This apparatus was produced to BS 800.
Maintenance
To clean this unit, use a soft, dry cloth.
For very dirty surfaces, dip a soft cloth in a weak soap-and-water
solution and wring well. After cleaning, wipe with a soft, dry cloth.
Never use alcohol, paint thinner, benzine, or a chemically treated
cloth to clean this unit.
Such chemicals may damage the unit’s finish.

Troubleshooting Guide
Before requesting service for this unit, check the chart below for a possible cause of the problem you are experiencing. Some simple checks or a
minor adjustment on your part may eliminate the problem and restore proper operation.
If you are in doubt about some of the check points, or If the remedies indicated in the chart do not solve the problem, refer to the directory of
Authorized Service Centers (enclosed with this unit) to locate a convenient service center, or consult your Technics dealer for instructions.
Problem Probable cause(s)
Suggested remedy
Problems noted at
all times
No sound is heard when the
power is switched ON.
The power cord plug is not completely Inserted.
• Confirm that the power cord plug is connected
completely.
Connections to the speakers, etc. are Incomplete
or incorrect.
• Check to be sure that all connection wires are
correctly connected.
The Input selector setting Is incorrect.
• Check to be sure that the selection of the desired
sound source is made correctly.
The speaker selector is set incorrectly.
• Set It to the correct position.
When listening to stereo
sound, the sound lacks
depth (i.e. thin bass, tinny
sound).
One of the speakers Is connected out of phase
[(+)->(-). (~M+)1-
• Reconnect the speakers maintaining proper polarity
[i.e., (+)-(+), (-)-(-)].
When listening to stereo
sound, the left and right
sounds are reversed.
The left and right speaker connections, source
connections, or graphic equalizer connections
are reversed.
• Check all connections and correct them if necessary.
A low-pitched noise (“hum”
or “buzz”) is heard.
The power cord or a fluorescent light, etc., is near
the connection wires.
•Try separating this unit as far as possible from the
electric appliance.
Sound Is not heard from
one of the speakers.
The speaker wires are disconnected.
• Check and correct the connections of the speaker
wires.
The balance control is set too far to one side.
• Set so that sounds are heard at the center, between
the speakers.
Sound stops during a
performance, or no sound
Is heard when the power is
switched ON.
The protection circuitry has functioned because
the positive and negative speaker connection
wires are “shorted", speakers with an Impedance
less than the indicated rated impedance of the
amplifier are used, or DC voltage appears in the
output, causing the protection circuitry to
function.
• Switch OFF the power, and, after determining and
correcting the cause, switch ON the power once
again.
• Use the speakers of the proper impedance rating.
While using the remote control transmitter
The remote control
transmitter does not
Batteries are incorrectly placed.
• Insert the batteries so that the positive (+) and
negative (-) polarities are correct.
function.
The remote control transmitter batteries are dead.
• Replace them with new batteries.
There is an obstruction between the remote
control transmitter and this unit.
• Remove the obstruction.
The remote control transmitter Is not correctly
facing this unit.
• Face the remote control transmitter correctly
toward this unit.