Pioneer A-109 User Manual
STEREO AMPLIFIER
A-109
Operating Instructions
1
Thank you for buying this PIONEER product.
Please read through these operating instructions so you will
know how to operate your model properly. After you have
finished reading the instructions, put them away 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
explanatory drawings. However, the method of connecting
and operating the unit is the same.
IMPORTANT
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within the
product's enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
CAUTION:
TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
WARNING: TO PREVENT FIRE OR SHOCK HAZARD,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
This product complies with the Low Voltage Directive (73/
23/EEC), EMC Directives (89/336/EEC, 92/31/EEC) and CE
Marking Directive (93/68/EEC).
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
The cut-off plug should be disposed of and must not be
IMPORTANT
FOR USE IN THE UNITED
KINGDOM
The wires in this mains lead are coloured in
accordance with the following code :
If the plug provided is unsuitable for your socket
outlets, the plug must be cut off and a suitable plug
fitted.
Blue : Neutral
Brown : Live
inserted into any 13 amp socket as this can result in electric
shock. The plug or adapter or the distribution panel should
be provided with a 5 amp fuse. 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,
proceed as follows :
The wire which is coloured blue must be connected to the
terminal which is marked with the letter N or coloured black.
The wire which is coloured brown must be connected
to the terminal which is marked with the letter L or coloured
red.
POWER-CORD CAUTION
Handle the power cord by the plug. 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, a piece 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.
Do not connect either wire to the earth terminal of a
three-pin plug.
NOTE
After replacing or changing a fuse, the fuse cover in the
plug must be replaced with a fuse cover which corresponds to the colour of the insert in the base of the plug
or the word that is embossed on the base of the plug, and
the appliance must not be used without a fuse cover. If
lost, replacement fuse covers can be obtained from your
dealer.
Only 5 A fuses approved by B.S.I. or A.S.T.A to B.S.
1362 should be used.
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 or other
chemicals on or near this unit, since these will corrode
the surfaces.
2
CONTENTS
FEATURES ......................................................................... 3
INSTALLATION .................................................................. 3
CONNECTIONS.................................................................. 4
PANEL FACILITIES............................................................. 6
FEATURES
7 Advanced Direct Energy MOS Power Amp
Pioneer incorporates highest quality amp circuitry featuring Advanced Direct Energy MOS FET devices which can
achieve higher performance. Together with Pioneer’s original Wide Range Linear Circuit technology they reduce
power consumption while maintaining the power output of
current models.
In terms of performance, this technology contributes to flat
damping factor characteristics across the audio spectrum.
It also allows a wide range and especially ultra␣ high frequencies to be reproduced more accurately and improves
power linearity.
OPERATIONS..................................................................... 9
TROUBLESHOOTING ...................................................... 11
SPECIFICATIONS ............................................................. 12
7 High-power Output of 40 W+40 W/8 Ω(DIN)
7 Wide-Range Linear Circuit
This new current feedback circuit assures improved operating stability for flat output impedance and stable driving
of speakers across the full range of frequencies.
7 Low power consumption design.
7 Complementary capacitor pair.
7 Stabilizer
Transformer stabilizer and stabilizer frame (attached to
chassis) deliver powerful sound.
INSTALLATION
LOCATION
Install the unit in a well-ventilated location where it
will not be exposed to high temperatures or humidity.
Do not install the unit in a location which is exposed to direct
rays of the sun, or near hot appliances or radiators. Excessive
heat can adversely affect the cabinet and internal components. Installation of the unit in a damp or dusty environment
may also result in a malfunction or an accident. (Avoid
installation near cookers etc., where the unit may be exposed
to oily smoke, steam or heat.)
Do not install the unit on a tottered stand, nor on an unstable
or inclined surface.
VENTILATION
÷ When installing this unit, make sure to leave space around
the unit for ventilation to improve heat radiation (at least 60
cm at top, 10 cm at rear, and 30 cm at each side). If not
enough space is provided between the unit and walls or
other equipment, heat will build up inside, interfering with
performance or causing malfunctions.
÷ Do not place on a thick carpet, bed, sofa or fabric having a
thick pile. Do not cover with fabric or other covering.
Anything that blocks ventilation will cause internal temperature to rise, which may lead to breakdown or fire
hazard.
3
CONNECTIONS
Before making or changing the connections, switch off the power switch and disconnect the power cord from
the AC outlet.
CD player
OUT
L
R
CD
Cassette deck/
CD recorder/
MD recorder
MINIDISC
PLAY
REC
L
R
L
R
L
R
R
L
R
L
L
L
R
L
R
L
R
R
Cassette deck
L
R
REC
PLAY
L
R
L
R
Adaptor component
(graphic equalizer etc.)
IN
OUT
L
R
L
R
L
R
L
R
Turntable
SIGNAL
PHONOINTUNERINCDINLINEINTAPE 1/CD-R/MD
GND
L
R
TAPE 2 MONITOR
REC PLAY REC PLAY
SPEAKERS
RL
L
R
OUT INOUT IN
L
R
L
R
L
R
·ª·
ª
·
ª
L
R
L
R
OUT
FM-AM
Tuner DVD player, VCR, etc.
ª·
L
R
AUDIO OUT
DVD
AC INLET
To an AC wall socket.
Speaker
system (Left)
Speaker
system (Right)
4
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