Pioneer c 90 a owners manual

Page 1

Opera ting
Instructions

STEREO CONTROL AMPLIFIER

C-SOa

ligi-mi-«imimii

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 ex-
planatory drawings. However, the method of connecting and
'operating the unit is the same.

CONTENTS

Features .......
Connections .
Panel Facilities and Functions ..

.. 2 Operations ........
3 Troubleshooting .
.. 4 Specifications .

PIONEERO

The future of sound and vision.

Page 2

IMPORTANT 1

The lightning flash with arrowhead, within an
equilateral tiiangla, is intended to alert the user of the
presence of uninsulatad "dangerous voltage within Ihe
products enclosure that may be OI sufliciertl magnitude
to constitute a risk at electric shock to persons

CAUTION

RISK OF ELECTRIC SHOCK
DO NOT OPEN

CAUTION:

TO PREVENT THE RISK OF ELECTRIC SHOCK. DO
NOT REMOVE COVER (OH BACKI. NO USER
SERVICEABLE PARTS INSIDE. REFER SERVIC-
ING T0 QUALIFIED SERVICE PERSONNEL

The exclamation point within an equilateral triangle is
intended to alert the user oi the presence of important
operating and maintenance (servicing) instructions in
the literature accompanying the appliance.

IMPORTANT 2

It the apparatus is titted with AC mains power outletls),
sea REAR PANEL FACILITIES for convenient connecn
lion nf additional Hi-Fi mmnentlsl. Make all connec-
tions to the Ac outletts) and the signal terminals tirst.
Connect the plug to the wall socket last, makt! sure that
lhe power switch is 0". Disconnect the wall plug when

FOR USE IN THE UNITED
KINGDOM

The wires in this mains lead are coloured in accordance
with lhe following code:

Blue: Neutral

Brown: Live

As the colours of the wires in the mains lead DI this an
paratus may not correspond with Ilia common marking
identitying the terminals in your plug proceed as
follows:

The wire which is coloured blue must be connected to
Ihe terminal which is marked with the teller N or cnlr
cured black.

the equipment is not in (regular) use, 6,9. whsn on
vacation.

The wire which is coloured brown mus! be conneclcd m
Ihe terminal which is marked with the Iotlcr L in col
outed red.

Equipment sold in the UK. Is not supplied with a
power plug.

FEATURES

SIMPLE design

Based on the fundamental design concept that "simple is
best, the number of circuit elements from input to output has
been made as small as possible.

Independent left, right, and control mono-
construction design.

The C7903 features a three power»transformer design with
independent transformers for the left channel, right chann
nel, and control system, thus eliminating sound deteriora»
tion due to mutual interference,

2

Anti-vibration design.

Special resin material is used in the base legs, aluminum in the
volume control, and copper plating on screws, in order to
eliminate any adverse influence of vibration on sound quality.

High-sound-quality parts

From circuit boards, resistors. and condensers, to semicon-
ductors and wiring, the C-90a uses high-sound-quality parts
specially developed for audio use.