Basic Operating; Switching On The 8251; Volume; Selecting The Audio Sources - Revox B251 Operating Instructions Manual

2
BASIC OPERATING
PROCEDURES
2.1
Switching
on
the
8251
amplifier
-
Press POWER
ON button
[1]
or one of
the
MONITOR
buttons
([31]
trough [36]) to switch the amplifier
on.
- When the amplifier is switched
on
with
POWER
ON
[1],
the
last
operating condition
is
automatically reestablished.
lf one
of the MONITOR
buttons ([31] trough
[36])
is
pressed, the
se-
lected source is connected through.
-
The speaker
outputs
are
only enable after
a
brief delay in
order
to
prevent damage
to the
speaker
system
from
switching
clicks.
2.1.1
Selecting the audio sources
(MONITOR
SELECTORS
[31]
trough
[36])
A different audio source can be selected at any
time after the
amplifier
has been switched on. The selection buttons
[31]
through
[36]
activate the corresponding outputs
on
the
rear pa-
nel of the
amplifier.
TAPE 1 t31l
:
signalfrom inputTAPE
1
lN [49]
TUNER
l32l
:
signal
from
input TUNER
[50]
PHONO
[33]
:
signal
from input
PHONO
MM [56] or
from
input
PHONO
MC
[57] (option)
if
the
PHONO
switch
[10] is
in
the MC
position
The required capacitance
of the cartridge (refer
to
specifica-
tions
of
the
cartridge) should
be
approximately equalto the sum
of the cable capacitance and the
switch
capacitance.
TAPE
2 t34l
:
signal
from
input
TAPE
2 lN
t48l
DISC
[35] :
signal
from
input
DISC
[51]
AUX
[36] :
signal
from
input
AUX
[55]
t31l t32l
t33l
rll
t34l t35l
t36l
IEVOX
r
t_l
rä
fur:
roNf
t)crdnor JA4,
2.1.2
Volume
control
R'VOX
Press
button VOLUME [25]. The display l2Tlwill
be switched
to potentiometer
indicaiion.
n
':<
ThespeakeroutpUtSareenabledwithadelayofapproximatelywltruH=ffiF
3 seconds
(speaker
protection).
Two volumes
are
possible
after - .i
,;
;
'!'LUi'-
'L:rra., raFE?
the amplifier has been
switched
on:
-
lf
the last volume selected
was
higher than
the programmed
power-on volume (for programm ing refer to Section
4.1.1).
the
volume is reduced to
the power-on volume.
-
lf
the amplifier was previously operated below the power-on
volume. this lower
volume
is selected.
Adjusting the volume:
-
The
volume can be reduced by
pressing
button
[28] or
in-
creased
by
pressing button [29].
-
The
volume changes slowly if one of the
buttons
is
pressed on
the side
with
one
arrow
((
or
))
and
quickly
if
pressed on the
side
with
two arrows
((
or
)).
2.1.3
Channel balance
The channel balance
is
adjusted
with
the
two buttons BALANCE
LEFT [16] and RIGHT [14].
The range of
adjustment
is
+3/-10
dB
and can be
varied
in steps of
0.5
dB.
The
sound
pattern can
thus
be
accurately adjusted
to
the
acoustics
of
the
room. Brlef
touch-
ing of the buttons adjusts
the balance
in
one 0.5 dB step,
other-
wise the balance is
automatically corrected step-by-step for
as
long as
the button is held.
t14l