Pioneer SA-9800 Руководство по эксплуатации - Страница 2
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CONTENTS
FOOT OS resi iccctaicete ee Cee
6 ya owes
2
Effective Operations .........-.0++00+5
12
Stereo System Composition
...........-
3
Using the Tape Decks ..........-.++++-+
13
Installation Precautions
......-....+ tee
Bi
Using PRE OUT and POWER AMP IN
Rear Panel Facilities.............200405
4
Jacks
«1.1...
eee e eee eee eee eee 14
.
Conditions Frequently Mistaken for
RSMIRRC RDI Sir STE SG HR ARES
S
Malfunctions ........s0.¢seeese0es 15
Front asa Facilities ...... wiaseetos sated
8
Specifications
ae
Operations ...+.0-eseeerers Siete
ras
11
Schematic Diagram.............. Insertion
|
FEATURES
Power Amplifier with Ultra-wide-frequency-band
Output and Low Distortion
This amplifier
has the impressive feature which is the
NSA
(Non-Switching-Amplifier),
created
specially
by
Pioneer, This is a type of amplifier that adopts the merits of
both
the class A and class B amplifiers, and it excels in
keeping down
the heat loss and allows the transistors to
operate all the time in the active region, For this reason, a
high output power
with a very low distortion
factor is
yielded all the way up to the high frequencies.
Also it is designed to pack a punch at every stage — this
is evident in the first stage differential input, current mirror
load; the predriver stage emitter follower drive, constant-
current
load;
and
the output
stage
2-stage
Darlington,
parallel push-pull output circuit configuration. All this adds
up to a DC amp configuration which uses SL RETs (Super
Linear Ring Emitter Transistors}, which have an excellent
switching response
in the high frequency
range, for the
power transistors,
harmonic distortion.
T-shaped
"skyve"
heat
sink
is used
because
it is
lightweight
and
it dissipates
the heat
very
effectively.
Even when the amplifier is operating continuously under
full power conditions, these heat sinks keep the rise in tem-
perature down, and they ensure that a high-quality power is
provided,
Flat Amplifier with High S/N Ratio and Low
Distortion
This mode! adopts an ICL DC amplifier which is com-
posed of a two-stage differential amplifier for the first stage
using ultra-low-noise dual FETs and an emitter follower for
the final stage. This construction is successful in achieving a
low distortion and a high signal-to noise ratio, and in main-
taining an S/N ratio of
110dB (AUX).
Equalizer Amplifier for Faithful Reproduction of
Sound from Records
The equalizer amplifier is composed of a complementary
differential input which uses ultra-low-noise transistors for
the first stage, and a 3-stage direct-coupled all-stage push-
pull configuration.
This results in yielding a low noise and
low distortion, a signal-to-noise ratio of 90dB (PHONO)
and an RIAA
equalization of only +0.2dB across a fre-
quency spectrum of 20Hz to 20kHz. The maximum rated
input is 250mV/MM
(at 1kHz, 0.002%
total harmonic
distortion) and tOmV/MC, proving that there is more than
enough
headroom
for the reproduction
of sound
from
records.
Load Impedance Selector Switches
This amplifier comes with cartridge load selectors which
make
it possible to display the performance of moving
magnet
(MM) cartridges to the full for sophistication in
operation,
The
load resistance
selector has five settings
(100/10k/25k/50k/100k ohms)
and
the load capacitance
selector
similarly
has five settings
(100/200/300/400/
500pF),
so
that
the two
selectors
can be used
inde-
pendently.
They allow you to make settings which are in
line with the optimum values of the phono cartridge you
are using and also to create
the sound
quality of your
choice.
Another
feature is the MC position which means you
can connect
a moving coil (MC) cartridge with a subtle
and delicate sound quality directly, All you have to do to
derive
the
maximum
in enjoyment
from
your
MC
car-
tridge is set the function selector to the PHONO
2 MC
position,
Power Output Indication on Fluorescent
Display Tubes
The conventional
needle-type of power output meters
have been replaced with the more up-to-date fluorescent
display
tubes featuring digital technology, They employ
logarithmic compression circuits and a peak hold circuit to
indicate
the power
output
over a 0.3mW
to 1OOW
range
without any assisting selection on the attractive fluorescent
display tubes.
2
* Measured pursuant to the Federal Trade Commission's Trade Regulation rule on Power Output Claims for Amplifiers.