Pioneer A-550R-S Servicehandleiding - Pagina 26
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A-550R.
A-450R
© PHONO
SELECTOR
button (A-550R
only)
Set in accordance with the type of cartridge used with your
turntable.
MM
(1):
Set to this position when using a moving magnet car-
tridge, or a moving coil cartridge with a high output
of 1 mV or more.
MC
(mm):
Set to this position when using a moving coil car-
tridge.
@ PHONES jack
When using headphones, insert the plug into this jack.
SPEAKERS A selector button
Use this button to listen to the speaker systems connected to
SPEAKERS A terminals.
ON (.m):
Depressed position: Sound is heard from the speaker
systems.
OFF ({@):
Released position: No sound is heard from the speak-
er systems. Set to this position when listening with
headphones.
@ SPEAKERS B selector button
Use this button to listen to the speaker systems connected to
SPEAKERS B terminals.
ON (.m):
Depressed position: Sound is heard from the speaker
systems.
OFF (HL):
Released position: No sound is heard from the speak-
er systems. Set to this position when listening with
headphones.
Remote control sensor window
@ BASS tone contro!
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 DIRECT button
is in the
on position.
e
At volume levels lower than ''4,'' the set tone control ef-
fect is obtained.
At volume levels higher than ''4,"' the effect becomes in-
creasingly weaker.
@ TREBLE tone control
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:
©
This control does not operate when DIRECT button is in the
on position.
©
At volume levels lower than "'4,'' the set tone control ef-
fect is obtained.
At volume levels higher than ''4,"' the effect becomes in-
creasingly weaker.
32
@ SUBSONIC filter button/indicator (A-550R only)
Use this button when playing records with coarse grooves.
on:
The indicator lights: In this position, frequencies of 17 Hz
and below are cut, eliminating super-low-frequency noise
caused by coarse record grooves, and thus helping prevent
sound
distortion.
off: The indicator goes off: Leave in this position for normal
playback.
NOTE:
This button does not operate when DIRECT
button
is in the on
position.
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 low volume levels.
off: The indicator goes off: Should normally be left in this po-
sition.
NOTE:
This button does not operate when DIRECT button is in the on
position.
@5) DIRECT button/indicator
Use this button/indicator when you do not wish to pass the out-
put from input terminal equipment through the various frequency
adjusting circuits (BASS, TREBLE, SUBSONIC, LOUDNESS) and
adaptor terminals (ADAPTOR).
on:
The indicator tights: The signals input through the input ter-
minals are reproduced without passing through the vari-
ous frequency adjusting circuits. This results in flat, pure
sound which is a more faithful reproduction of the input
source.
off: The indicator goes out: The signal passes through the var-
ious frequency adjusting circuits.
MUTING button/indicator
Use to temporarily cut sound volume.
on:
The indicator lights.
The sound is cut off.
off: the indicator goes off.
The sound will return to its previous volume.