Pioneer A-505R Manuel d'entretien - Page 14
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5.
ADJUSTMENTS
1)
IDLE
CURRENT ADJUSTMENT
1.
Connect
the
measuring
instrument
as Fig.5-1.
(R413 orR4I4)
2.
Set the
VOLUME CONTROL
to
minimum,
BASS
TONE
CONTT^OL
to center,
TREBLE
TONE CONTROL
to center,
BALANCE
CON-
TROL
to
center
and
REC SELECTOR SWITCH
to
off.
Set
VR301
and
VR302
to
minimum.
3.
Set the
POWER
switch
to
ON.
4.
Adjust
VR301
(VR302)
so
that the
voltage
between
both
sides
of
R413
(R4I4) becomes
16mV±lmV.
(Within 10 seconds
from
when
the
relay
is
turned
ON)
5.
Ages
for
7
minutes.
6.
Adjust
VR301
(VR302)
so
that the
voltage
between
both
sides
of
R413
(R414)
becomes
1
lmV±lmV.
Fig.5-1
Adjustment
Method