Pioneer A-757 User manual

SPARE
PARTS:
MASTER
STEREO AMPLIFIER
le evs
ass Oar
“A-656" is not available in U.S.
Operating
Instructions
The illustration shows model A-757.
Thank you for buying this Pioneer product.
Please read through these operating instructions so you will know
how to operate your unit properly, After you have finished reading
the instructions, keep the manual in a safe place for future
reference.
In some countries or regions, the shape of the power plug and
power outlet may sometimes differ from that shown in the
drawings. However, the method of connecting and operating the
unit is the same,
WARNING :: To PREVENT FIRE OR SHOCK HAZARD,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
IMPORTANT NOTICE
[FOR U.S. and Canadian models]
The serial number for this equipment is located on the rear panel.
Please write this serial number on your enclosed warranty card
and keep it in a secure area. This is for your security.
[For Canadian model]
CAUTION: To PREVENT ELECTRIC SHOCK DO NOT USE
THIS (POLARIZED) PLUG WITH AN EXTENSION CORD,
RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES
CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
ATTENTION :; POUR PREVENIR LES CHOCS
ELECTRIQUES NE PAS UTILISER CETTE FICHE POLARISEE
AVEC UN PROLONGATEUR UNE PRISE DE COURANT OU
UNE AUTRE SORTIE DE COURANT, SAUF Si LES LAMES
PEUVENT ETRE INSEREES A FOND SANS EN LAISSER
AUCUNE PARTIE A DECOUVERT.
LINE VOLTAGE SELECTOR SWITCH
Only multi-voltage models are provided with this
switch. U.S., Canadian, European, U.K., and Australian
models are not provided with this switch.
Mains voltages in Saudi Arabia are 127V and 220V
only. Never use this model with 110V setting in Saudi
Arabia.
The line voltage selector switch is on the rear panel. Before your
model is shipped from the factory, this switch is set to the power
requirements of the destination. Check that it is set properly before
plugging the power cord into the AC wall socket. If the voltage is
not properly set or if you move to an area where the voltage
requirements differ, adjust the selector switch as follows.
1. Use a medium-size screwdriver.
2. Insert the screwdriver into the groove on the voltage selector,
and adjust so that the tip of the arrow points to the voltage
value of your area. VOLTAGE SELECTOR
120-127 HOV
2s0v 204
a
Py
eA SF
Medium-size
screwdriver
@ PIONEER’
The future of sound and vision.
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IMPORTANT 1
The lightning flash with arrowhead, within an
equilateral triengle, is intended to alert the user of the
presence of uninsulated "dangerous voitage” within the
product's enclosure that may be of sufficient magni-
tude to constitute 2 risk of electric shock to persons.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: ft within an equila fe
TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT f the presi of rapor tant
REMOVE COVER {OR BACK). NO USER-SERVICEABLE operating and maintenence isesvicing) iastructions in
PARTS INSIDE. REFER SERVICING TO QUALIFIED the literature accompanying appliance.
SERVICE PERSONNEL.
IMPORTANT 2
If the apparatus is fitted with AC mains power out-
let(s), see REAR PANEL FACILITIES for convenient
connection of additional Hi-Fi component(s). Make
all connections to the AC outlet(s) and the signal
terminals first. Connect the plug to the wall socket
last, make sure that the power switch is off.
READ INSTRUCTIONS — Ali the safety and operating
instructions should be read before the appliance
is operated
RETAIN INSTRUCTIONS ~ The operating instructions
should be retained for future reference.
HEED WARNING — All warnings on the appliance and
in the operating instructions should be adhered to.
FOLLOW INSTRUCTIONS — All operating end use in-
structions should be foliowed.
WATER AND MOISTURE — The applience should not
be used near water — for example, near a bathtub,
washbow!, kitchen sink, jaundry tub, in a wet
basement, or near 3 swimming pool, etc
LOCATION ~ The appliance should be installed in a
stable location.
WALL OR CEILING MOUNTING — The appliance
should not be mounted to a wall or ceiling,
VENTILATION — The appliance should be situated so
that its location or position does not interfere with
its proper ventilation. For example, the appliance
should not be situated on a bed, sofa, rug, or simi-
lar surface thet may block the ventilation open-
ings; or, placed in @ built-in installation, such as
2 bookcase or cabinet that may impede the flow
of air through the ventilation openings.
HEAT — The appliance shouid be situated away from
heat sources such as radiators, heat registers,
stoves, or ather appliances {including emplifiers)
that produce heat.
POWER SOURCES — The appiiance should be con-
nected to a power supply only of the type
described in the operating instructions or as
marked on the appliance.
POWER-CORD PROTECTION — Power-supply cords
should be routed so that they are not likely to be
walked on or pinched by items placed upon or
against them, paying particular attention to cords
at plugs, convenience receptacles, and the point
where they exit from the appliance.
POLARIZATION — If your purchased product is provid-
ed with a polatized power plug, please read the fol-
lowing instructions. This product is equipped with
a polarized alternating current line plug la plug hav-
ing one blade wider than the other). This plug will
fit into the power outlet only one way. This is @
safety feature. if you are unable to insert the plug
fully into the outlet, try reversing the plug. Hf the
plug should still fail to fit, contact your eiectrician
to replace your obsolete outlet. Do not defeat the
safety purpose of the polarized plug
CLEANING — The appliance should be cleaned only
with a polishing cloth or 2 soft dry cloth. Never
ciean with furniture wax, benzine, insecticides or
other volatile liquids since they may corrode the
SAFETY INSTRUCTIONS
FOR USE IN THE UNITED As the colours of the wires in the mains lead of this
apparatus may not correspond with the coloured
KINGDOM marking identifying the terminals in your plug proceed
as follows:
The wires in this mains lead are coloured in accor- The wire which is coloured blue must be connected to
dance with the following code: the terminal which is merked with the letter N or
Blue: Neutral coloured black
Brown: Live The wire which is coloured brown must be connected
to the terminal which is marked with the letter L or
coloured red.
Equipment sold in the U.K. is not supplied with
a power plug.
POWER LINES — An outdoor antenna should be OUTOOOR ANTENNA GROUNDING — if an outside
located away from power lines. antenna is connected to the antenna terminal, be
NONUSE PERIODS — The power cord of the appliance sure the antenna system is grounded so as to pro-
should be unplugged from the outlet when left vide seme protection against voltage surges and
_unused for a long period of time. built up static charges.
OBJECT AND LIQUID ENTRY — Care should be taken: In the U.S.A, section 810 of the Nationa! Etectri-
so that objects do not fall and liquids are not spilled cal Code, ANSI/NFPA No. 70-1984, provides
inte the enclosure through openings information with respect to proper grounding of
DAMAGE REQUIRING SERVICE — The appliance the mast and supporting structure, grounding of
should be serviced by a Pioneer authorized service the lead-in wire to an antenna discharge unit, size
center or qualified service personnel when of grounding conductors, ocation of antenna dis-
@ The power-supply cord or the plug has been charge unit, connection to grounding electrodes,
damaged; or and requirements for the grounding electrode: See
® Objects have fallen, or liquid has been spilled into Fig. A.
the appliance; or CART — An appliance and cart combination should be
@ The appliance has been exposed to rain; or moved with care. Quick stops, excessive force,
@ The appliance does not appear to operate normally ang uneven surfaces may cause the appliance and
or exhibits a marked change in performance: or cart combination to overturn.
@ The appliance has been dropped; or the enclosure
damaged.
SERVICING — The user should not attempt to service
the appliance beyond that described in the oper-
ating instructions. For all other servicing, contact
the nearest Pioneer authorized service center
a} Use No. 10 AWG (5.3 mm’) cop-
per, No.8 AWG (8.4 mm’) aiumi-
num, No.1? AWG (1.0 mm?)
copper-ciad steel, bronze wire, or
larger as ground wire,
b) Secure antenna lead-in and
Lest ground wires to house with stand-
ui re off insulators spaced from 4 feet
Mentone B (1.22 meters) to 6 feet (1.83
meters} apart
ANTENNA 6) Mount antenna di
WIRE closely as possible to wh
in enters how
TO EXTERNAL — d)__Use jumper wire not smaller than
POWER LINES
SERVICE
ENTRANCE
CONDUCTORS +
age unit ag
re lead-
ANTENNA ; A
EG Ge No.6 AWG.(13.3 mm} copper, of
PRODUCT the equivalent, whesi a separate
ce H antenne-grounding electrode is
Le crouno RE e® AS Na used
SERVICE ENTRANCE |f} CLAMPS UNIT ¢ See NEC Section 810-27 tj}.
EQUIPMENT GROUND
WIRE a,b
4, GROUND
POWER SERVICE zp CLAMPS
GROUNI
fe.g. int OPTIONAL ANTENNA
GROUNDING ELECTRODE
BONDING He DRIVEN 8 FEET (2.44mi
Cabinets
JUMPERd
=
8
INTO
THE
EARTH
8
iF
REQUIRED
BY
FIG.A
$
Local
coves
See
NEC
SECTION
810-21
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FEATURES
CONNECTIONS
CONTENTS
3
PANEL
FACILITIES
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OPERATIONS °-
TROUBLESHOOTING
SPECIFICATIONS ‘oo oct terre treet tee t tence teen ene
FEATURES
These operating instructions are for:
A-757; 150W + 150W/4 © (DIN) power model
A-656; 120W + 120W/4 Q (DIN) power model
The illustrations and text in this manual refer
basically to A-757.
¢ Drive capacity 150W + 150W/4 Q (DIN) matching to high power
and low-impedance-type speaker system.
[model A-856+ +++ 120W + 120W/4 Q (DIN)]
* The use of DIRECT circuit assures high fidelity playback of
consistent frequency characteristics, accompanied by maximum
clarity.
e REC SELECTOR switch makes tape editing very simple.
e Clean ground technology prevents noise on power line to flow
to the signal ground line, permitting clean sound reproduction.
¢ Non-Switching Circuit Type Ill (A-656 is Type II) is employed to
realize high quality sound with minimum distortion.
* Comes with a built-in phono equalizer which accepts MC
cartridge.
¢ Casted Power Transformer (A-757 only)
*® Honeycomb Frame Chassis
e Honeycomb Heat Sink
3
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:

CONNECTIONS
CD piayer
=o:
©
Speaker
ouT
REC
PLAY
REC
PLAY
REC
PLAY
system
B
(R)
t
®re|
.
@
@r
@ rR ®rS @r@
Speaker
system B (L)
Not provided in |
the U.K. model. |
swircve
TOTAL TOOW MAX. 1OOW
VOLTAGE SELECTOR:
r0az7v ov |
2aov 229V Not provided in |
Cn the U.S. and |
YA Canadian model
The illustration shows
model A-757,
Shorting bars:
CAUTION:
Do not insert the shorting bars into
other terminals after removing
them.
L Model A-757 only.
L{ A-656...ADPT/TAPE 3
\A-757...ADPT 1/TAPE 3
To an AC
wall socket
Speaker
system A (L)
Speaker
system A (R)
Video disc player
Tuner VCR etc.
Turntable
4
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CONNECTIONS
CONNECTING SPEAKER CORDS
1. Strip off the vinyl covering and twist the tip of
the wire core.
Twist the wire core.
2. Loosen the knob and insert the wire core into
the terminal hole.
3. Tighten the knob to fix the wire core in place.
NOTE:
Do not allow the wire core to protrude and touch other terminals or
wires.
If
the
cores
of
different
wires
touch,
damage
may
be
caused
to your components.
Speaker Impedance
When speaker systems are connected to only one of the
SPEAKERS
A
or
B
terminals,
such
speakers
should
have
rated
impedance in the range of 4-16Q.,
When speakers are connected to both the A and B terminals, they
should have a rated impedance in the range of 8- 32.
CONNECTING INPUT/OUTPUT CORDS
Left channel
Right channel WO mas
ight channe! ~@
See
a CCliar
Red plug
White plug
Connect
the
white
plug
to
the
L
(left)
side,
and
the
red
plug
to
the
R
(right)
side.
Be
sure
to
push
the
plugs
in
securely.
TO
USE
THE
COMPONENT
CONNECTED
TO
THE
ADPT
2
TERMINALS
(A-757
only)
1.
Set
the
POWER
switch
to
OFF.
2. Remove the two shorting bars from the ADPT
2 terminals.
bord @
OUT
Shorti
NOTE:
horting
bars,
Remove the shorting bars to connect a graphic equalizer to these
terminals, Always keep the bars inserted while the terminals are
not in use, and take care not to lose them.
A-757
Graphic equalizer
The U.K. moedel is not provided with the AC OUTLETS.
AC OUTLETS (SWITCHED)
Power supplied through these outlets is turned on and off by
the amplifiers POWER switch. Total electrical power
consumption of connected equipment should not exceed
100 W (model A-656 of the other destination are 150W).
AC OUTLET (UNSWITCHED)
Power flows continually to this outlet, regardless of whether the
amplifier is switched ON or OFF. Electrical power consumption
of the connected equipment should not exceed 100 W.
The equipment should be disconnected by removing the power
plug from the wall socket when not in regular use, e.g., when
on vacation.
NOTE:
Do not connect appliances with high power consumption such
as heaters, irons, or television sets to the AC OUTLETS in
order to avoid overheating or fire risk.
5
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|
|
/
|
|

PANEL
FACILITIES
[FRONT
PANEL]
@
POWER
switch/indicator
Press
to
turn
power
to
the
unit
ON
and
OFF.
When
the
power
is
ON,
indicator
lights.
@ PHONES jack
When
using
headphones,
insert
the
plug
into
this
jack.
@
SPEAKERS
selector
switch
Use
this
switch
to
listen
to
the
speaker
systems
connected
to
the
SPEAKERS
terminals.
OFF:
Released
position:
No
sound
is
heard
from
the
speaker
system.
Set
to
this
position
when
listening
with
headphones.
A:
For
reproduction
of
sound
with
the
speaker
systems
connected
to
the
SPEAKERS
A
terminals.
B:
For
reproduction
of
sound
with
the
speaker
systems
connected
to
the
SPEAKERS
B
terminals.
A+B:
For
reproduction
of
sound
with
the
speaker
systems
connected
to
SPEAKERS
A
and
B
terminals.
@
BASS
tone
control
Use
to
adjust
the
low-frequency
tone
at
low
volume
level.
The
center
position
is
the
flat
(normal)
position.
When
turned
to
the
right,
low-frequency
tones
are
emphasized;
when
turned
to
the
left,
low-frequency
tones
are
de-emphasized.
NOTE:
This
function
does
not
operate
when
the
DIRECT
switch
is
in
the
ON position.
®
TREBLE
tone
contro!
Use
to
adjust
the
high-frequency
tone
at
low
volume
level.
The
center
position
is
the
flat
(normal)
position,
When
turned
to
the
right,
high-frequency
tones
are
emphasized;
when
turned
to
the
left,
high-frequency
tones
are
de-emphasized.
6
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A-757...ADPT
1/TAPE
3
Model
A-656
is
not
equipped
with
@
and
®.
bere
3
)
NOTE:
This
function
does
not
operate
when
the
DIRECT
switch
is
in
the
ON position.
©
BALANCE
control
Should
normally
be
left
in
the
center
position.
Adjust
balance
if
the
sound
is
louder
from
one
of
the
speakers.
If
the
right
side
is
louder,
turn
toward
the
LEFT
position
and
if
the
left
side
is
louder,
turn
toward
the
RIGHT
position.
NOTE:
This
function
does
not
operate
when
the
DIRECT
switch
is in
the
ON position.
@
PHONO
EQ
switch/indicator
(A-757
only)
When
not
using
a
phono
input,
turn
the
phono
equalizer
power
circuit
off
in
order
to
prevent
it
from
collecting
noise
during
playback
of
other
sources.
ON:
The
indicator
lights:
Always
set
to
this
position
when
using
a
phono
input.
Immediately
after
turning
ON,
audio
signal
will
be
muted
for
several
seconds
until
circuit
operation
becomes
stable.
OFF:
The
indicator
goes
off:
Set
to
this
position
when
not
using
a
phono
input.
LOUDNESS
switch/indicator
Use
when
listening
at
low
volume
levels.
ON:
The
indicator
lights:
Boosts
low
and
high
frequencies
to
give
added
punch
to
playback
even
at
low-volume.
OFF:
The
indicator
goes
off:
Should
normally
be
left
in
this
position.
NOTE:
This
switch
does
not
operate
when
the
DIRECT
switch
is
in
the
ON
position.

PANEL FACILITIES
© ADPT 1/TAPE 3 switch/indicator
(ADPT/TAPE 3 switch in the A-656)
Use this switch to listen to tape playback, or to listen to the
sounds being recorded during tape recording.
ON:
The indicator lights: Press when listening to the playback sound of
the tape deck or the adaptor connected to the ADPT 1/TAPE 3
IN/PLAY terminals, or to monitor the sound being recorded on the
tape deck connected to the ADPT 1/TAPE 3 OUT/REC terminals.
OFF:
The indicator goes off: Normally leave the switch in this position.
NOTE:
When the DIRECT switch is set to ON, this function does not
operate and no signal is output at the ADPT 1/TAPE 3 OUT/REC
terminals.
@ DIRECT switch/indicator
Use this switch when you do not wish to pass the output from input
terminal equipment through the various frequency adjusting
circuits and adaptor terminals (ADPT 1/TAPE 3, ADPT 2, BASS,
TREBLE, BALANCE, LOUDNESS).
ON:
When the switch is in this position, the indicator lights and the
signals input from the input terminals are reproduced without
passing through the various frequency-adjusting circuits. This
results in flat, pure sound which is a more faithful reproduction of
the input source.
OFF:
When the switch is in this position the indicator goes out and the
signal passes through the various frequency adjusting circuits.
@ PHONO SELECTOR switch
Set in accordance with the type of cartridge used in you turntable.
MM:
Set to this position when using a moving magnet cartridge, or a
MC (moving coil) cartridge with high output of 1 mV or more.
MC:
Set to this position when using a moving coil cartridge.
MM SUBSONIC/MC SUBSONIC:
Subsonic filter for moving coil or moving magnet cartridges to cut
ultralow frequency noise less than 17 Hz generated when playing
a warped record.
When using a high-output moving coil cartridge, set this switch to
MM or MM SUBSONIC.
@ VOLUME CONTROL
Use to adjust volume level.
NOTE:
This unit is equipped with a circuit that attenuates the effect of tone
and loudness controls at volume is turned up.
@ MUTING switch/indicator (A-757 only)
Use to temporarily cut sound volume.
ON:
The indicator lights. The sound volume will be cut off.
OFF:
The indicator goes off. The sound will return to its previous volume.
@ INPUT SELECTOR switch
Use to select playback source.
LINE:
Set to this position when listening to the programs from a
component connected to the LINE terminals.
TUNER:
Set to this position when listening to AM or FM broadcasts with a
tuner, -
PHONO:
Set to this position when listening to record playback on a
turntable.
cD:
Set to this position when listening to a compact disc playback with
aCbD player.
DAT/TAPE 1:
For playback with a tape deck or digital audio tape deck connected
to the DAT/TAPE 1 terminals.
TAPE 2:
For playback with a tape deck connected to the TAPE 2 terminals.
® REC SELECTOR switch
Switch to select recording signal. When set at other than SOURCE
or OFF position, signals can be recorded during playback of the
equipment selected by INPUT SELECTOR switch.
TUNER:
To record from a TUNER.
cD:
To record from a CD player.
OFF:
In this position nothing from the REC terminals of DAT/TAPE 1 and
TAPE 2 will be output. Select it when not recording; output to tape
decks will be disconnected, improving sound quality.
SOURCE:
To record the equipment selected by INPUT SELECTOR switch.
TAPE:
12
To record (copy) from the tape deck of DAT/TAPE 1 terminals,
over to the tape deck of TAPE 2 terminals.
21
To record (copy) from the tape deck of TAPE 2 terminals, over to
the tape deck of DAT/TAPE 1 terminals.
NOTE:
The REC SELECTOR switch has no effect on the recording out put
of the ADPT 1/TAPE 3 terminals.
z
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PANEL FACILITIES
[REAR PANEL]
@ TAPE 2 PLAY terminals.
@ DAT/TAPE 1 PLAY terminalis.
@ TAPE 2 REC terminals.
@ DAT/TAPE 1 REC terminals.
@ SPEAKERS B terminals (right channel).
.@ SPEAKERS 8 terminals (left channel).
@ AC OUTLETS. (Not provided in the U.K. model)
@® VOLTAGE SELECTOR.
(Not provided in the U.K. model and, U.S. &
Canadian models of A-757)
@® Power cord.
Connect this cord to an AC wall socket, or the AC outlet of an
audio timer.
@® SPEAKERS A terminals (left channel).
8
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@
a
SRTEREG mewirenen
ora Toow aux “Sao tas
The illustration shows model A-757,
@ SPEAKERS A terminals (right channel).
@ ADPT 1/TAPE 3 OUT/REC terminals.
ADPT/TAPE 3 OUT/REC terminals. (A-656 only)
@ ADPT 1/TAPE 3 IN/PLAY terminals.
ADPT/TAPE 3 IN/PLAY terminals. (A-656 only)
® Shorting bars. (A-757 only)
@ ADPT 2 IN terminals. (A-757 only)
@ ADPT 2 OUT terminals. (A-757 only)
@ PHONO terminals.
@ Turntable ground terminal (GND).
@ LINE terminals.
@® TUNER terminals.
@ CD terminals.

OPERATIONS
BEFORE BEGINNING OPERATIONS
Set the controls and switches as follows: See page 6.
1. Set the VOLUME CONTROL to minimum. @
2. Set the POWER switch to ON. ©
3. Set the SPEAKERS switch to A, BorA+B.@
4
Set the BALANCE control to the center
position. ©
5. Set the DIRECT switch to OFF. @
6. Set the ADPT 1/TAPE 3 switch to OFF. ©
PLAYBACK PROCEDURES
1. Set the INPUT SELECTOR or ADPT 1/TAPE 3
switch. @, ©
How to select playback source;
¢ When listening to programs from equipment connected to the
LINE terminals: Set to [LINE].
« When listening to an AM/FM broadcast: Set to [TUNER].
¢ When listening to a record: Set to [PHONO].
PHONO EQ switch to ON. (A-757 only)
Set PHONO SELECTOR switch to MM (MM SUBSONIC) or MC
(MC SUBSONIC) according to the type of cartridge being used.
* When listening to a compact disc: Set to [CD]. =
« When listening to a tape: Set to [DAT/TAPE 1], [TAPE 2] or
[ADPT 1/TAPE 3].
2. Operate the playback equipment.
3. Adjust playback volume with the VOLUME
CONTROL on this unit. @
RECORDING TAPES
1. Select the recording source with REC
SELECTOR switch.
« When set to the SOURCE position, the signals from the device
selected by INPUT SELECTOR switch are recorded. (To record
signals from the device connected to the PHONO or LINE
terminals, set the REC SELECTOR switch to SOURCE and set
the INPUT SELECTOR switch to PHONO or LINE.)
When recording the signal from PHONO terminal, set PHONO
EQ switch to ON position. (A-757 only)
¢ Recording is impossible with the switch set to OFF.
NOTE:
When this switch is set at other than SOURCE position, the
equipment selected by REC SELECTOR switch can be recorded,
regardless of the setting of INPUT SELECTOR and DIRECT
switches,
2. When using the tape deck connected to the
ADPT 1/TAPE 3 terminals for recording. ©
The source selected with the INPUT SELECTOR will be recorded,
regardless of the REC SELECTOR position.
However, recording will not be possible when the DIRECT switch is
ON.
3. Begin recording by operating the source
equipment and tape deck.
Refer to the operating instructions for your tape deck for proper
operating procedures.
MONITORING WHILE RECORDING
When recording of the tuner or CD only.
On a 3-head tape deck, sound can be concurrently heard while
recording. This operation of checking the sound quality and
recording level is called “monitoring.” At the time of monitoring, set
the INPUT SELECTOR switch of this equipment in the following
way, to match the tape deck on which recording is being done.
When recording on the tape deck of DAT/TAPE 1 terminals:
Set to DAT/TAPE 1.
« When recording on the tape deck of TAPE 2 terminals:
Set to TAPE 2.
* When recording on the tape deck of ADPT 1/TAPE 3 terminals:
ADPT 1/TAPE 3 switch to ON.
COPYING TAPES:
When two decks (or a double cassette deck) are used, you can
record the sounds from one deck onto the other.
Application examples:
* To make a tape copy with contents identical to the original tape.
* To edit a recording of a radio broadcast in order to cut out
unwanted commercials, reocrding only desired material onto
another tape.
When using two tape decks
1. Load tapes for playback (pre-recorded tape)
and recording into the respective tape decks.
2. Select the tape deck to be copied with REC
SELECTOR switch.
« When copying from the tape deck of DAT/TAPE 1 terminals, to
the tape deck of TAPE 2 terminals: Set to 1 B> 2.
e When copying from the tape deck of TAPE 2 terminals, to the
tape deck of DAT/TAPE 1 terminals: Set to 2 > 1.
NOTE:
The tape selected with REC SELECTOR switch can be copied,
regardless of the settings of INPUT SELECTOR and DIRECT
switches.
3. Operate the tape decks to begin copying.
Set the tape deck with the original (playback) tape to the playback
mode, and set the tape deck with the blank tape to the recording
mode.
Playback using graphic equalizer
As to A-757, it can deal with playback of all sources when
connecting a graphic equalizer to the ADPT 2 terminals. However,
playback is not possible when the DIRECT switch is ON.
NOTE:
Remove the shorting bars before using these terminals. Always
keep the bars inserted while the terminals are not in use, and take
care not to lose them (A-757 only).
9
<ARB1175>
E

TROUBLESHOOTING
Incorrect operations are often mistake
n
for
trouble
and
malfunctions.
If
you
think
that
there
is
something
wrong
with
this
component
check
the
points
below.
Sometimes
the
trouble
may
lie
in
another
component.
Investigate
the
other
components
and
electrical
appliances
being
used.
If
the
trouble
cannot
be
rectified
even
after
exercising
the
checks
listed
below,
ask
your
nearest
PIONEER
authorized
service
center
or
your
dealer to carry out repair work.
Symptom
4
Probable Cause
Remedy
No power supplied to unit
Power plug is disconnected from outlet.
The
component
power
plug
has
been
plugged
into
another
component
power
outlet
(e.g.
timer,
etc,),
but
power
to
that
unit
is
disconnected.
i
Insert plug securely in outlet.
Turn on power to the other component.
No sound
Connecting cords are disconnected from
terminals, or connected incorrectly.
Terminals, or connecting cords pin plugs are
dirty.
The INPUT SELECTOR or ADPT 1/TAPE 3
switch selected does not match the
component being played back.
Operation of other components is incorrect.
The SPEAKERS selector switch is set to
“OFF”. :
The PHONO EQ switch is OFF position
(When listening PHONO in A-757.)
Shorting bars are not inserted into the ADPT 2
terminals.
Connect securely.
Clean terminals and plugs.
Set switches correctly (PHONO, TUNER, CD,
LINE, DAT/TAPE 1, TAPE 2). Set the ADPT
1/TAPE 3 to OFF.
Consult
the
opeating
instructions
for
the
other
components.
Set the switch to A, B or A+B.
Set PHONO EQ switch to ON position.
Insert the shorting bars properly.
|
No sound from one speaker
Connecting cords or speaker cords are
disconnected on that side.
BALANCE contro! has been adjusted to one
side.
Connect securely.
Adjust BALANCE control to center position.
fe
an't record tapes
The position of the REC SELECTOR switch is
incorrect.
Connections are incorrect.
Operation of tape deck is incorrect.
Set switch correctly.
(See section RECORDING TAPES).
Reconnect cords properly.
Consult the operating instructions for the tape
deck,
Can't perform tape copying
The position of the REC SELECTOR switch is
incorrect.
Operation of tape decks is incorrect.
Set switch correctly
(See section COPYING TAPES).
Consult the operating instructions for the tape
decks.
POWER-CORD CAUTION
Handle the power cord by the piug. Do not pull out the plug by tugging
the cord and never touch the power cord when your hands are wet as
this could cause a short circuit or electric shock. Do not place the unit,
apiece of furniture, etc., on the power cord, or pinch the cord. Never
make a knot in the cord or tie it with other cords. The power cords
should be routed such that they are not likely to be stepped on. A
damaged power cord can cause fire or give you an electrical shock.
Check the power cord once in a while. When you find it damaged, ask
your nearest PIONEER authorized service center or your dealer for a
replacement.
10
<ARB1175>
E

SPECIFICATIONS
[A-757]
Continuous power output (both channels driven at 20 Hz to
20 kHz) **
U.S., Canadian models
Continuous Average Power Output is 100
Watts** per channel, min., at 8 ohms from 20
Hertz to 20,000 Hertz, with no more than
0,003% total harmonic distortion.
*** Measured pursuant to the federal
Trade Commission’s Trade Regulation
rules on Power Output Claims for
Amplifiers.
FTC continuous power output (both channels driven)
20 Hz to 20 kHz, T.H.D. 0.003%, 8Q ----+-- 100W + 100W*
20 Hz to 20 kHz, T.H.D. 0.005%, 4 Q --+++-- 135W + 135W*
U.K, model
T.H.D, 0.003%, 8 Q
T.H.D. 0.005%, 4 Q
Other destination models
T.H.D, 0,003%, 8 Qsssereee 100W + 100W*
T.H.D. 0.005%, 4 Q sess 140W + 140W*
DIN continuous power output (both channels driven)
U.K, model
S5W + 95W*
++ 140W + 140W*
1 KHz, T.H.D. 1.0%, 8 Qerrerseeee sere TOOW + 100W
1 kHz, T.H.D. 1.0%, 4 Qseeeeeeeee «+++ 150W + 150W
Total harmonic distortion **
U.S., Canadian models
20 Hz to 20 KHz, 100W, 8 Q verter reer reer trees 0.003% *
20 Hz to 20 kHz, 135W, 4 Q ---++eree sai ajie inte ++ 0.005% *
U.K. model
20 Hz to 20 kHz, 95W,8Q --- 0.003% *
20 Hz to 20 kHz, 140W, 4 Q -- 0.005% *
Other destination models
20 Hz to 20 kHz, 100W, 8 Q +-++++++ + 0.003% *
20 Hz to 20 kHz, 140W, 4 Q verre reer reece eeeee ee 0.005% *
The followings are applicable to ail models.
Power bandwidth
0.05%, 82 ater e eee sean e eee tena e ewes 5 Hz-—70 kHz*
Damping factor
{1 kH2/20 Hz to 20 kHz), 8 Qe- essere eee eee eer enee 200/70
Dynamic power output (on EIA dynamic test signal)
4Q]22 +++ 2OOW/300W
Inter-modulation distortion (at rated output) - 0.003% *
input sensitivity/impedance
PHONO (MM) - 2.5 mV/50 kQ
PHONO (MC) ++ seer ee 0.2 mV/100 Q
CD, TUNER, LINE, TAPE
PHONO overload level
- 150 mV/50 kQ
1 kHz, T.H.D. 0.008% (MM/MC) ++++++---+- ++ 200 mV/19 mV
Output level/impedance
TAPE REC, ADAPTOR OUTPUT :------++>- 150 mV/2.2 kQ
Frequency response
PHONO (MM), 20 Hz to 20 kHz ---
PHONO (MC), 20 Hz to.20 kKHz--:-
CD, TUNER, LINE, TAPE (1 Hz to 150 kHz) --
-+ £0.246B
+ $0.3¢dB
. ype
+ ap
Tone control (volume contro! set at -40 dB position)
BASS - aia ‘
TREBLE -
Loudness contour (volume control set at -40 dB position)
Sette eesercesesconeceeensees +5 dB (100 Hz)/+3 dB (10 kHz)
Filter (GUBSONIC)++ +++ 0e essere seen ee er eee 17 Hz (12 dBjoct.)
Signal-to-Noise ratio (IHF short circuit, A network)
PHONO (MM, 5 mV input/MC, 0.5 mV input)
+ 95 dB/77 dB*
110 dB*
CD, TUNER, LINE, TAPE
Signal-to-Noise ratio (DIN, continuous power/50 mW)
PHONO (MM) + 74 dB/65 dB*
CD, TUNER, LINE, TAPE + 92 dB/68 dB*
Power Supply/Miscellaneous
Power requirements
U.S., Canadian models:+++++++ertrerree eee AC 120V, 60 Hz
U.K., Australian models - -a.c, 240 Volts ~, 50/60 Hz
Other destination models -+++++eesrreeerereeteeeeeeeensees
~AC110V/120 — 127V, /220V/240V (switchable), 50/60 Hz
Power consumption
U.S., Canadian models
U.K., Australian models -
Other destination models
AC outlets
switched (X 2) vrreeeeeeeeeeeeeeeereeseees
unswitched (X 1)++++erees
Dimensions ++++++++eeereer eee 420 (W) x 435 (D) x 162 (H) mm
16-9/16 (W) X 17-1/8 (D) x 6-3/8 (H) in
Weight (without package) :---+--+ +++ trerseeeess e+ 19,5 kg (43 Ib)
Accessories
Operating instructions -++++++
Cushion spacer set --+ ++ saiepaie ts as
NOTE:
Specifications and design subject to possible modification without
notice, due to improvements.
* When the DIRECT switch to ON,
** Measured by Audio Spectrum Analyzer.
Be sure to place the unit on a level surface so that it stands
firmly on all its feet. If wobbly, adjust by attaching the supplied
cushion spacers to one or more feet.
Cushion spacers ——=—- Peel off protective paper
S
11
<ARB1175>
E

SPECIFICATIONS
[A-656]
Continuous power output (both channels driven at 20 Hz to
20 kHz) **
U.K. model!
T.H.D. 0.005%, 8 Q +--+ +e etree reece rete eee TOW + 70W*
T.H.D, 0.008%, 4 Qrsrrreceresecereecereccese o5W + 95W*
Other destination models
T.H.D. 0.005%, BQ ere rree eerste rere eee eee s0W + 80W*
T.H.D, 0.008%, 4 Q +e seer eee terre errr eee 1OOW + 100W*
DIN continuous power output (both channels driven)
U.K, model
1 kHz, T.H.D. 1.0%, 8 2
1 kHz, T.H.D. 1.0%, 4 2
Power bandwidth
0.05%, BQ vc eee cece reer eee e rec ee eee eenes 5 Hz—80 kHz*
Damping factor
(4 kHz/20 Hz to 20 KHZ), 8 Q sss eer e eerste eee e eens 200/70
Dynamic power output (on EIA ‘dynamic test signal)
4Q/2Q-
Total harmonic distortion **
U.K. model
20 Hz to 20 kHz, 70W,8Q --
20 Hz to 20 kHz, 95W,4Q --->
Other destination models
20 Hz to 20 kHz, 80W, 8 Q +++
20 Hz to 20 kHz, 100W, 42 ---
Inter-modulation distortion (at rated output) -
Input sensitivity/impedance
PHONO (MM) ----
PHONO (MC) ---
CD, TUNER, LINE, TAPE----
PHONO overload level
80W + BOW
120W + 120W
0.005% *
+ 0.008% *
resee 0.005% *
0.008% *
0.005% *
2.5 mV/50 k Q
0.2 mV/100 2
150 mV/50 k Q
1 kHz, T.H.D, 0.008% (MM/MC) «+++ +++++++++ 200 mV/19 mV
Output level/impedance
TAPE REG coererecssserrcercrcereccerees 150 mV/2,2kQ
Frequency response
PHONO (MM), 20 Hz to 20 kHz - + £0.2dB
PHONO (MC), 20 Hz to 20 kHz- +0.34B
CD, TUNER, LINE, TAPE (1 Hz to 150 kHz) ++ ++-+-- +9 aB*
MAINTENANCE OF EXTERNAL
SURFACES
* Use a polishing cloth or dry cloth to wipe off dust and dirt.
* When the surfaces are very dirty, wipe with a soft cloth
dipped in some neutral cleanser diluted five or six times with
water, and wrung out well, and then wipe again with a dry
cloth. Do not use furniture wax or cleaners.
* Never use thinners, benzine, insecticide sprays and other
chemicals on or near this unit, since these will corrode the
surfaces,
Tone contro! (volume contro! set at 40 dB position)
BASS + 8 dB (100 Hz}
+ 8 dB (10 kHz)
Loudness contour (volume control set at -40 dB position)
setterer sarees +5 dB (100 Hz)/+3 dB (10 kHz)
Filter (SUBSONIC)- 17 Hz (12 dB/oct.)
Signal-to-Noise ratio (HE st short circuit, A network)
PHONO (MM, 5 mV input/MC, 0.5 mV input)
CD, TUNER, LINE, TAPE:+++r+erececerereeeeecene 110 dB*
Signal-to-Noise ratio (DIN, continuous power/50 mW)
PHONO (MM) - ++ 74 dB/65 dB *
CD, TUNER, LINE, TAPE:- ++ 92 dB/68 dB*
Power Supply/Miscellaneous
Power requirements
U.K., Australian models ---
Other destination models - -
~AC110V/120 — 127V, /220V/240V (switchable), 50/60 Hz
Power consumption
U.K., Australian models ---
Other destination models - +
AC outlets
switched { x 2)
unswitched (X 1)-+rrrrt sree erect terete cette reese
+ ac, 240Volts ~, 50/60 Hz
Dimensions «++++++++++ . ++ 420 (W) * 435 (D) x 162 (H) mm
16-9/16 (W) x 17-1/8 (D) x 6-3/8 (H) in
Weight (without package) ---+-+++++rrere eee 13.5 kg (29 Ib 12 oz)
Accessories
Operating
instructions
+++
++e+rereereee
seer
een
e
eres
eeeee
treed
NOTE:
Specifications and design subject to possible modification without
notice, due to improvements.
* When the DIRECT switch to ON.
** Measured by Audio Spectrum Analyzer.
Published by Pioneer Electronic Corporation.
Copyright © 1989 Pioneer Electronic Corporation.
Allrights reserved.
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS [USA] INC. 2265 East 220th Street, Long Beach, California 90810, U.S.A.
P.O. BOX 1720, Long Beach, California 90801, U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 505 Cochrane Drive, Markham, Ontario L3R 8£3, Canada
PIONEER ELECTRONIC [EUROPE] N.V._ Keetberglaan 1, 2740 Beveren, Belgium, TEL: [phone]
PIONEER
ELECTRONICS
AUSTRALIA
PTY.LTD.
178-184
Boundary
Road,
Braeside,
Victoria
3195,
Australia,
TEL:
[03]
580-9914
<S9EQOSF7E01>
Printed in Japan <ARB1175-A>