STA-100 Receiver  (310-2089)       Operation           Faxback Doc. # 16420

BEFORE PLUGGING IN THE STA-100

1.  Double-check all connections -- especially the speaker connections --
    to assure that all connections are firm and that there are no shorts.

2.  Set VOLUME to MIN.

3.  All pushbuttons should be out.

Now, plug in Receiver and push POWER button to turn it on.

SPEAKERS/HEADPHONES

Select any speaker or combination of speakers with the SPEAKERS switch.  In
the A position, the Receiver's power goes to the main speakers only and in
the B position to the remote speakers only.  A+B puts the same stereo
signal through both sets of speakers.  In the A REV position, the
left/right sound output from the A/Main speakers will be reversed. 
Sometimes this reversing of channels can give interesting effects from
various sound sources.

The PHONES jack permits headphone listening with any or all of the
speakers.  For private listening, turn the SPEAKERS switch to OUT.

VOLUME

Increase or decrease the VOLUME control setting for a pleasant listening
level.

BALANCE

If necessary, adjust BALANCE for best stereo effect and channel balance, or
to compensate for slightly off-center listening positions.

SELECTOR

Choose THE input you want to turning the SELECTOR switch.

   AM - Use the Tuning knob to find the desired station.  fine-tune for the
        highest reading on the TUNING meter.

   FM - Use the Tuning knob to select THE desired station.  If you're tuned
        to a stereo FM station, the STEREO light will come on.  Adjust
        Tuning for the highest reading on the meter.

PHONO - Adjust the VOLUME, BALANCE and Tone controls.  For the best sound
        and longest record life, do not track your cartridge below the
        recommended force.  Light tracking may actually cause more
        distortion than heavy tracking.

  AUX - Adjust VOLUME, BALANCE and Tone controls.  The auxiliary input can
        be used for any high-level source such as a tape player, a second
        tuner, TV, ceramic or crystal phono cartridge, ham radio, etc.

NOTE:  If the TAPE MONitor button is pressed in, the SELECTOR switch will
       have no effect on the sound.

TAPE MONitor

Press the TAPE MONitor button in to play tapes or (with a three-head deck)
to listen to tapes immediately after they have been recorded.  If not tape
is being played, pressing this button will silence the receiver.

FM 25 uS

(For USA/Canadian models)
Dolby FM Reception.  If you connect a Dolby noise reduction decoder to your
STA-100, you will be able to get the full benefit from Dolby FM broadcasts.
(Check with your local FM stations to see which ones offer Dolby FM
broadcasts.)

To listen to a Dolby FM broadcast:  Press FM 25 uS button in, press TAPE
MONitor button in and turn your Dolby noise reduction accessory on.  You
will then enjoy improved signal-to-noise-ratio; full dynamic range, even at
high frequencies; and improved reception in weak-signal areas.

To listen to non-Dolby FM broadcasts (or if you do not have a Dolby
decoder) leave FM 25 uS button out; otherwise the FM sound will have an
unnatural "brightness".

MUTE

To eliminate interstation noise while tuning for FM stations, press MUTE. 
Receiver will now be silent until you tune a relatively strong (3 uV or
more) signal.  To tune weak FM stations, leave MUTE button in out position.

LOUDNESS

When listening at low volume, press the LOUDNESS button.  This overcomes
the ear's reduced sensitivity to treble and bass at low volume by boosting
these frequencies.

MONO

Press the MONO button to defeat normal stereo operation.  the result is a
composite signal (left + right).  When you listen to weak FM stereo
stations, pressing the MONO button will reduce the hiss, but the signal
will no longer be stereo.

BASS

Turn the BASS control toward + to boost the low frequencies or toward - to
de-emphasize them.  In the center position, the control has no effect on
the sound.

TREBLE

Turn the TREBLE control toward + to boost high frequencies or toward - to
de-emphasize them.  In the center position, the control has no effect on
the sound.

HI FILTER

(For European and Australian models)
Press HIGH FILTER in to eliminate the pops and clicks on an old record,
hiss from tape or FM -- or any high frequency noise.

OVERLOAD PROTECTION

Your receiver has built-in, automatic overload protection.  If an abnormal
load is presented to the speaker terminals, this protective circuit will
automatically silence the Receiver.  If this happens, turn POWER "off" and
check all speaker connections; be sure no pieces of wire ar touching
between speaker terminals and be sure you don't have 4 ohm speakers
connected for both Main (A) and Remote (B).  When you are sure everything
is OK, apply power once more.

THERMAL PROTECTION

Your Receiver also has built-in thermal overload protection.  This means it
can not become abnormally hot and damage some portion of the circuitry.  If
internal temperatures do rise abnormally, the Receiver will automatically
silence itself.  If this happens, check to be sure you have not placed
something over the ventilation holes -- if you have, remote it.  If you are
using speakers with excessively low impedance, the amplifier circuit may be
over-driven and thus producing excessive heat.  This can be caused by using
4 ohm speakers on both Main (A) and Remote (B) speakers -- if you use both
pairs of speakers, be sure to use either 8 or 16 ohm types.


(ALL-08/10/95)