Pioneer SA 7700 Owners Manual

Page 1

STEREO AMPLIFIER

A-77II m

OPERATING INSTRUCTIONS KC

I

l

IMPORTANT NOTICE

_ J( The serial number for this equip- _
Q C ment is located on the rear panel.

S Q Please write this serial number on -
' F TIT . n your enclosed warranty card and
keep in a secure area. This is for
your security.

Walnut grained vinyl top and side panels are
used in the construction of this cabinet.

WARNING: TO PREVENT FIRE OR SHOCK HAZARD,

DO NOT EXPOSE THIS APPLIANCE TO RAIN 0R
GDPIONEER' mousruae.

IIII lllIllllll

Page 2

FEATURES

Low-distortion, Stable-output Power Amplifier

The power amplifier stage adopts a high-reliability npn,
pnp silicon power transistor-based differential first-stage
current mirror load, all-stage direct-coupled pure comple-
mentary OCL circuit.

Continuous power output is 60watts* per chan-
nel, min., at 80th from 20Hertz to 20,000
Hertz with no more than 0.04%total harmonic
distortion.

This is an output which is more than sufficient for
first-rate reproduction of music so the SA.7700 delivers a
powerful and yet high-fidelity stereo reproduction for your
enjoyment. Moreover, the first-stage differential amplifier
which employs two power transistors and the constant
current circuit assures an stable operation stable even in the
face of fluctuations in the power supply voltage and
external temperature.

Equalizer Amplifier with a Tip-top Signal-to-noise
Ratio

The equalizer amplifier features a 3-stage direct-coupled
circuit which adopts low-noise transistors in the first
stage. The SIN ratio thereby achieved is an excellent
86dB (lHF-A), the equalizer elements employ only those
parts which have undergone rigorous selection, and the
deviation in the 20Hz-20kl-lz frequency band is kept down
to 10.2dB. All these features add up to the reproduction of
records which is faithful to the original sound.

A high voltage is supplied from the dual positive and
negative power supplies and a maximum allowable phono
input of l80mV (1 kHz) is obtained with respect to a rating
of 2.5mV. This means that you can sit back and listen to
almost distortion-free record play when you use high-
-output cartridges or when the music source is punctuated
by high signal peaks.

Built.in Protection Circuitry Employing Relays and
Electronic Circuits

The protective circuitry, which is essentially a combina-

tion of electronic circuits and relays, protects the speakers
and power transistors against damage in the event of a
malfunction. There is also a muting circuit which eliminates
unpleasant surge noise during the on-off operation of the
power switch.

Power Meters that Allow the Output Level to be
Read Out Directly

The two large-sized meters located in the center of the
front panel incorporate logarithmic compression scales in
order to display the output level across a wide range from
0.01W to 100W. These handy meters mean that you can
directly read out the power level from 0.01W up to the
maximum output level of the SA-7700 at an 8-ohm
impedance.

Two Sets of Speaker Systems can be Connected

The SA-7700 comes with two sets of speaker terminal
and a speaker selector switch so you can compare the sound
through two different sets of speakers or place a second set
in another room. Another useful facility is the headphones
jack which allows you to listen to music in private late at
night through your stereo headphones.

Duplicate Switch for Easy Tape Editing

This one-touch duplicating switch allows you to do a
whole host of things with tapes. For example, with two
tape decks, you can edit tape programs which you yourself
have recorded in accordance with your own personal prefer-
ence. Also, you can duplicate open-reel tape deck record-
ings on a cassette tape deck.

Functionally Streamlined and Attractively
Designed Front Panel

The functionally designed front panel is made for easy
operation. lts two large-sized output meters in the center as
well as its knobs and switches which respond lightly to the
touch make operating the SA-7700 a real pleasure.

The design matches that of other Pioneer hi-fi stereo
components. Just one look is enough to reassure you that
you have bought the highest performance and most
attractively designed components available on the market.

CO NTEN TS

Features ............................ 2 Operation ........................... 7
Stereo System Composition ............. 3 USing the Tape Decks .................. 8
Installation Cautions .................. 3 Using the AUX Input Jacks ............. 9
Connection Diagram ................... 4 Conditions Frequently Mistaken for

Connections ......................... 4 Malfunction """"""""""""""" 10
Front Panel Facilities .................. 6 Specifications ........ . ............... 11
Before Operation ..................... 7 Schematic Diagram """""""" Insertion

2 * Measured pursuant to Federal Trade Commission 8 Trade Regulation rule on Power output Claims for Amplifiers.