Pioneer Stereo Amplifier A 109 User Manual

STEREO AMPLIFIER  
A-109  
Operating Instructions  
 
CONTENTS  
FEATURES ......................................................................... 3  
INSTALLATION .................................................................. 3  
CONNECTIONS.................................................................. 4  
PANEL FACILITIES............................................................. 6  
OPERATIONS..................................................................... 9  
TROUBLESHOOTING ...................................................... 11  
SPECIFICATIONS............................................................. 12  
FEATURES  
7 Advanced Direct Energy MOS Power Amp  
Pioneer incorporates highest quality amp circuitry featur-  
ing Advanced Direct Energy MOS FET devices which can  
achievehigherperformance.TogetherwithPioneer’sorigi-  
nal Wide Range Linear Circuit technology they reduce  
powerconsumptionwhilemaintainingthepoweroutputof  
current models.  
7 High-power Output of 40 W+40 W/8 (DIN)  
7 Wide-Range Linear Circuit  
This new current feedback circuit assures improved oper-  
ating stability for flat output impedance and stable driving  
of speakers across the full range of frequencies.  
Intermsofperformance,thistechnologycontributestoflat  
damping factor characteristics across the audio spectrum.  
It also allows a wide range and especially ultra high fre-  
quencies to be reproduced more accurately and improves  
power linearity.  
7 Low power consumption design.  
7 Complementary capacitor pair.  
7 Stabilizer  
Transformer stabilizer and stabilizer frame (attached to  
chassis) deliver powerful sound.  
INSTALLATION  
LOCATION  
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 tem-  
perature to rise, which may lead to breakdown or fire  
hazard.  
Install the unit in a well-ventilated location where it  
will not be exposed to high temperatures or humid-  
ity.  
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 compo-  
nents. 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.  
3
 
CONNECTIONS  
Before making or changing the connections, switch off the power switch and disconnect the power cord from  
the AC outlet.  
Cassette deck/  
CD recorder/  
MD recorder  
Adaptor component  
(graphicequalizeretc.)  
Cassette deck  
CD player  
MINIDISC  
CD  
IN  
OUT  
PLAY  
REC  
PLAY  
REC  
OUT  
L
R
L
L
L
R
R
R
L
L
R
L
L
L
L
R
R
R
R
L
L
L
L
R
R
R
SPEAKERS  
SIGNAL  
GND  
PHONO  
TUNER  
CD  
LINE  
TAPE 1/CD-R/MD  
REC PLAY  
TAPE  
REC  
2
MONITOR  
PLAY  
AC INLET  
R
L
L
L
R
R
·
·
ª
ª
IN  
IN  
IN  
IN  
OUT  
IN  
OUT  
IN  
L
L
R
·
·
ª
ª
To an AC wall socket.  
R
L
L
R
R
OUT  
AUDIO OUT  
FM-AM  
DVD  
DVD player, VCR, etc.  
Speaker  
Speaker  
Turntable  
Tuner  
system (Left) system (Right)  
4
 
CONNECTIONS  
CONNECTING THE SPEAKER CORDS  
CONNECTING THE INPUT/OUTPUT  
CORDS  
1. Stripoffthevinylcoveringandtwistthetipofthe  
wire core.  
ConnectthewhiteplugtotheL(left)channel, andtheredplug  
to the R (right) channel. Be sure to push the plugs securely.  
10mm  
Left channel  
L
White plug  
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.  
Right channel  
R
Red plug  
2
1
\
3
NOTE:  
Do not allow any of the cord conductors to protrude from the  
terminals or touch any other conductors. Malfunctioning or  
breakdowns may occur when conductors come into contact  
with each other.  
Speaker Impedance  
The speaker systems used should have a rated impedance in  
the range of 6 - 16 .  
5
 
PANEL FACILITIES  
[ FRONT PANEL ]  
1
2
3
4
VOLUME  
STEREO AMPLIFIER  
POWER  
z¿,?/ Direct Energy MOS  
TAPE 1/  
TAPE 2  
CD  
TUNER PHONO  
LINE  
CD-R/MD  
MONITOR  
OFF _ON  
SPEAKERS  
BASS  
TREBLE  
BALANCE  
INPUT SELECTOR  
PHONES  
LOUDNESS  
DIRECT  
TAPE  
2
MONITOR  
+
+
L
R
MIN  
MAX  
-
0
9
8
7
6
5
1 POWER (OFF/_ON) switch  
4 TAPE 2 MONITOR button/indicator  
Use when there is an adaptor component (graphic equalizer,  
etc.) or cassette deck connected to the TAPE2 MONITOR  
terminals.  
On : Indicator lights when using the adaptor component or  
listening to the cassette deck.  
Press to turn power to the unit ON and OFF.  
2 VOLUME control  
Use to adjust the volume level.  
Off : Indicator goes off when not in use.  
3 INPUT SELECTOR knob/indicators  
Turn the knob clockwise or counterclockwise so that the  
indicatorlightsforyourdesiredinputsource. Turningtheknob  
clockwise causes the lit indicator to right. Turning counter-  
clockwise causes it to left.  
NOTES:  
• When no connections are made to the TAPE2 MONITOR  
terminals, or when they are not in use, be sure to set this  
switch to the off position. (No sound will be heard if it is set  
to the on position.)  
CD  
: For compact disc playback with a CD player.  
: ForAMorFMbroadcastreceptionwithatuner.  
: For record playback with a turntable.  
: Set to this position when listening to the pro-  
gramfromacomponentconnectedtotheLINE  
terminals.  
TUNER  
PHONO  
LINE  
• When the TAPE2 MONITOR indicator is on and the INPUT  
SELECTORknobisnotsettoTAPE1/CD-R/MD,thesignals  
which are input through TAPE2 MONITOR are then output  
at TAPE1/CD-R/MD REC OUT.  
TAPE 1/  
CD-R/MD  
: Forplaybackwithacassettedeck, CDrecorder  
orMDrecorderconnectedtotheTAPE1/CD-R/  
MD terminals.  
6
 
PANEL FACILITIES  
5 BALANCE control  
8 TREBLE tone control  
Should normally be left in the center position. Adjust balance  
ifthesoundislouderfromoneofthespeakers.Iftherightside  
is louder, turn toward the L (left) position and if the left side is  
louder, turn toward the R (right) position.  
Use to adjust the high-frequency tone. 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.  
NOTE:  
NOTE:  
This control does not operate when the DIRECT button is in  
the on position.  
This control does not operate when the DIRECT button is in  
the on position.  
6 DIRECT button/indicator  
9 BASS tone control  
Use this button when you do not wish to pass the output from  
input terminal equipment through the various frequency ad-  
justing circuits (BASS, TREBLE, BALANCE, LOUDNESS).  
On : The indicator lights: The signals passing through the  
inputterminalsarereproducedwithoutpassingthrough  
the various frequency adjusting circuits. This results in  
flat, pure sound which is a more faithful reproduction of  
the input source.  
Use to adjust the low-frequency tone. 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 control does not operate when the DIRECT button is in  
the on position.  
Off : The indicator goes off: The signal passes through the  
various frequency adjusting circuits.  
0 PHONES jack  
When using headphones, insert the plug into this jack.  
7 LOUDNESS button/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 a low volume  
level.  
NOTE:  
The speakers continue to output sound even when head-  
phones are plugged into this jack.  
To mute the sound from the speakers, press the SPEAKERS  
button to OFF.  
Off : The indicator goes off: Should normally be left in this  
position.  
- SPEAKERS button/indicator  
Use this button to listen to the speaker system connected to  
the SPEAKERS terminals.  
On : The indicator lights. Sound is heard from the speaker  
system.  
NOTE:  
This button does not operate when the DIRECT button is in  
the on position.  
Off : The indicator goes off. No sound is heard from the  
speakersystem.Settothispositionwhenlisteningwith  
headphones.  
7
 
PANEL FACILITIES  
[ REAR PANEL ]  
1
2 3 4 5 6 7 8 9  
0
-
=
SPEAKERS  
SIGNAL  
GND  
PHONO  
TUNER  
CD  
LINE  
TAPE 1/CD-R/MD  
REC PLAY  
TAPE  
REC  
2
MONITOR  
PLAY  
AC INLET  
R
L
L
L
R
R
ª
ª
·
·
IN  
IN  
IN  
IN  
OUT  
IN  
OUT  
IN  
1 GND (Turntable ground) terminal  
2 PHONO terminals  
3 TUNER terminals  
4 CD terminals  
= AC INLET jack  
Connect one end of the power cord to here and the other end  
to an AC wall socket, or the AC outlet of an audio timer.  
If you are going to be away from home for a long period of  
time, disconnect the unit from the wall socket.  
NOTES:  
÷ If you use an other power cord than provided, we cannot  
assume the liabilities in what may occur as a result of it.  
÷ (The provided power cord has a current capacity of 2.5 A.)  
5 LINE terminals  
6 TAPE 1/CD-R/MD REC (OUT) terminals  
7 TAPE 1/CD-R/MD PLAY (IN) terminals  
8 TAPE 2 MONITOR REC (OUT) terminals  
9 TAPE 2 MONITOR PLAY (IN) terminals  
0 SPEAKERS terminals (Right channel)  
- SPEAKERS terminals (Left channel)  
8
 
OPERATIONS  
BEFORE BEGINNING OPERATIONS  
COPYING TAPES  
When two decks are used, you can record the sounds from  
one deck onto the other.  
1. Set the VOLUME control to minimum.  
2. Set the POWER switch to ON.  
3. Press the SPEAKERS switch to ON.  
4. Set the BALANCE control to the center position.  
5. Set the DIRECT button to off.  
Application examples:  
÷ To make a tape copy with contents identical to the original  
tape.  
6. Set the TAPE2 MONITOR button to off.  
÷ To edit a recording of an FM broadcast in order to cut out  
unwanted commercials, recording only of desired material  
onto another tape.  
PLAYBACK PROCEDURES  
1. Set the INPUT SELECTOR knob to the desired  
playback source.  
1. Load tapes for playback (pre-recorded tape) and  
recording (blank tape) into the respective cas-  
sette decks.  
2. Select the copying direction with the INPUT SE-  
LECTOR knob and TAPE2 MONITOR button.  
÷ WhencopyingfromthecassettedeckoftheTAPE1/CD-  
R/MD terminals to the cassette deck of the TAPE2  
MONITOR terminals: Set the INPUT SELECTOR knob  
to TAPE1/CD-R/MD.  
÷ For playback of a compact disc: Set to [CD].  
÷ For reception of an AM/FM broadcast: Set to [TUNER].  
÷ For playback of a record: Set to [PHONO].  
÷ For playback with the equipment connected to the LINE  
terminals: Set to [LINE].  
÷ For playback of a tape: Set to [TAPE1/CD-R/MD].  
NOTES:  
÷ When you do not want to monitor the TAPE2 MONITOR  
sound, set the PATE2 MONITOR button to OFF.  
÷ When you select PHONO, the sound is muted for a few  
seconds.  
÷ When copying from the cassette deck of the TAPE2  
MONITORterminalstothecassettedeckofTAPE1/CD-  
R/MD terminals: Set the TAPE2 MONITOR button to  
ON and the INPUT SELECTOR knob to a position other  
than TAPE1/CD-R/MD.  
2. Operate the equipment to begin playback.  
3. Adjust playback volume with the VOLUME con-  
trol on this unit.  
4. Adjust the tone to your preference using the  
BASS and TREBLE controls, and LOUDNESS but-  
ton.  
3. Operate the cassette decks to begin copying.  
Set the cassette deck with the original (playback) tape to  
the playback mode, and set the cassette deck with the  
blank tape to the recording mode.  
RECORDING TAPES  
1. Select the recording equipment with the INPUT  
SELECTOR knob.  
2. Beginrecordingbyoperatingtherecordingequip-  
ment and cassette deck.  
Refer to the operating instructions of your cassette deck  
for proper operating procedures.  
9
 
OPERATIONS  
TO USE THE COMPONENT CONNECTED  
TO THE TAPE2 MONITOR TERMINALS  
[For a cassette deck]  
÷ A cassette deck connected here can be operated in the  
same way (recording and playback) as a deck connected to  
the TAPE2 MONITOR terminals.  
÷ Also, if two decks are used, you can copy tapes from one  
deckontotheother(seethesectiononCOPYINGTAPES”).  
1. Set the TAPE2 MONITOR button to ON.  
2. Operate the cassette deck to perform playback  
(or recording).  
NOTE:  
The source selected with the INPUT SELECTOR knob is  
backedupforafewdaysevenwhenthePOWERswitchisset  
to off or the power cord is unpluged.  
After this period, the CD is automatically selected when the  
power is supplied.  
[For an adaptor component]  
Byconnectingagraphicequalizer, sourcesounds(fromdiscs,  
tapes, AM/FM broadcasts, etc.) can be heard with added  
sound and tone compensation.  
Sounds compensated with the adaptor component can be  
recorded on the cassette deck connected to the TAPE1/CD-  
R/MD terminals.  
1. Set the TAPE2 MONITOR button to ON.  
2. Play back the source.  
3. Operate the adaptor component.  
NOTE:  
Besuretoperformthisoperationwiththeadaptorcomponent  
power switch in the on position. Even when not using the  
adaptor component, its power switch must be left on. If the  
adaptor component is switched off, no sound will be pro-  
duced, or the playback sound will be distorted.  
10  
 
TROUBLESHOOTING  
Incorrectoperationsareoftenmistakenfortroubleandmalfunctions.Ifyouthinkthatthereissomethingwrongwiththiscomponent,  
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  
Cause  
Remedy  
No power supplied to unit.  
÷ Power plug is disconnected from outlet.  
÷ Insert plug securely into outlet.  
÷ The amplifier’s power plug has been plugged ÷ Turn on power to other component.  
into another component’s power outlet (e.g.  
timer, etc.) but power to that unit is discon-  
nected.  
÷ The AC INLET plug is disconnected.  
÷ InserttheACINLETplugsecurelytillthe  
bottom of the jack.  
No sound.  
÷ Connecting cords are disconnected from ter- ÷ Connect securely.  
minals, or connected incorrectly.  
÷ Terminals, or connecting cords pin plugs are ÷ Clean terminals and plugs.  
dirty.  
÷ The TAPE2 MONITOR button is set to ON ÷ Set the button to OFF.  
(except when using an adaptor component).  
÷ Operation of other components is incorrect.  
÷ Consult the operating instructions for  
the other components.  
÷ The position of the INPUT SELECTOR does ÷ Set the button correctly (CD, TUNER,  
not match the component to be played back.  
PHONO, LINE, TAPE1/CD-R/MD).  
÷ SPEAKERS button is set to OFF.  
÷ Set the button to ON.  
No sound from one speaker. ÷ Connectingcordsorspeakercordsarediscon- ÷ Connect securely.  
nected on that side.  
÷ BALANCE control is set to one side.  
÷ Set BALANCE control to center posi-  
tion.  
Cannot record tapes.  
÷ Connections are incorrect.  
÷ Operation of cassette deck is incorrect.  
÷ Reconnect properly.  
÷ Consult the operating instructions for  
the cassette deck.  
÷ The TAPE2 MONITOR button is set to ON.  
÷ SettheTAPE2MONITORbuttontoOFF.  
Cannot perform tape copy- ÷ The position of the INPUT SELECTOR knob ÷ Set buttons correctly. (See section  
ing.  
and TAPE2 MONITOR button are incorrect  
(when using 2 cassette decks).  
COPYING TAPES.)  
÷ Operation of cassette decks is incorrect.  
÷ Consult the operating instructions for  
the cassette decks.  
Abnormal functioning of this unit may be cased by, static electricity, or other external interference. To restore normal operation, turn  
the power off and then on again, or unplug the AC power cord and then plug it in again.  
11  
 
SPECIFICATIONS  
Amplifier Section  
Power Supply/ Miscellaneous  
Continuous power output  
Power requirements .................... AC 220 - 230 V, 50/60 Hz  
Power consumption ..................................................... 80 W  
Dimensions (including knobs and other protruding parts)  
...................................... 420 (W) X 114 (H) X 307 (D) mm  
Weight (without package) ...........................................4.3 kg  
(both channels driven at 20 Hz to 20 kHz)**  
T.H.D. 0.1 %, 8 ..................................... 30 W + 30 W*  
DIN Continuous power output  
(both channels driven at 1 kHz)  
T.H.D. 1.0 %, 8 ....................................... 40 W + 40 W  
Total harmonic distortion**  
Accessories  
Operating Instructions........................................................ 1  
Power cord (Rated current 2.5 A)....................................... 1  
Warranty card..................................................................... 1  
20 Hz to 20 kHz, 15 W, 8 ................................ 0.08 %*  
÷ The above values are applicable when AC 230 V power is  
supplied.  
Input sensitivity/ impedance  
PHONO (MM) ........................................... 2.8 mV/ 50 kΩ  
CD, TUNER, LINE, TAPE1/CD-R/MD, TAPE2 MONITOR  
................................................................. 200 mV/ 50 kΩ  
PHONO (MM) overload level  
NOTE:  
Specificationsanddesignaresubjecttopossiblemodification  
without notice, due to improvements.  
1 kHz, T.H.D. 0.1 % ............................................. 150 mV  
Output level/ impedance  
TAPE1 REC, TAPE2 MONITOR REC ......... 200 mV/ 1 kΩ  
Frequency response  
*
Measured with DIRECT button set to on.  
** Measured by Audio Spectrum Analyzer.  
PHONO (MM) ...........................20 Hz to 20 kHz ± 0.5 dB  
CD, TUNER, LINE, TAPE1/CD-R/MD, TAPE2 MONITOR  
+0  
– 3  
.....................................................5 Hz to 100 kHz dB*  
Tone control  
BASS ....................................................... ± 8 dB (100 Hz)  
TREBLE ................................................... ± 8 dB (10 kHz)  
Loudness contour (volume control set at – 30 dB position)  
......................................+ 6 dB (100 Hz)/ + 4 dB (10 kHz)  
Signal-to-Noise ratio (IHF short circuit, A network)  
PHONO (MM, 5 mV input) ................................... 85 dB*  
CD, TUNER, LINE, TAPE1/CD-R/MD,TAPE2 MONITOR .  
............................................................................ 106 dB*  
Signal-to-Noise ratio (DIN, continuous power/ 50 mW)  
PHONO (MM) ............................................71 dB/ 67 dB*  
CD, TUNER, LINE, TAPE1/CD-R/MD, TAPE2 MONITOR  
...................................................................91 dB/ 71 dB*  
Published by Pioneer Corporation.  
Copyright © 2000 Pioneer Corporation.  
All rights reserved.  
PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan  
PIONEER ELECTRONICS [USA] INC.  
P.O. BOX 1540, Long Beach, California 90801-1540, U.S.A.  
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway, Markham, Ontario L3R OP2, Canada  
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium TEL: 03/570.05.11  
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia, TEL: [03] 9586-6300  
PIONEER ELECTRONICS DE MEXICO S.A. DE C.V.  
San Lorenzo Num 1009 3er piso Desp. 302 Col. Del Valle, Mexico D.F. C.P. 03100 TEL: 5-688-52-90  
<00B00ZF0P00>  
Printed in  
<ARB7237-A>  
 

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