JVC JA-S310 User Manual

woo
Alignment
(our } an Se it (] oo
R735
Ot ols
[DECREASE ] eS [INCREASE J LINCREASE ] ag [DECREASE ]
NGUBRERY/ CURRENT?
R719 R720
Fig. 9
1.
Adjustment
of
the
center
voltage
of
the
power
amplifier
2.
Adjustment
of
the
idling
current
of
the
power
amplifier
(see
Fig.
9).
(see
Fig.
9).
Adjustment sequence and method: Adjustment sequence and method:
* Adjust R707 and R708 to medium before switching * Turn R719 and R720 fully, in the direction of
the power on. DECREASE.
* Connect the negative lead of a high sensitivity * Connect the same high sensitivity voltmeter, used in
voltmeter
(which
can
show
correct
values
below
the
adjustment
of
the
center
voltage,
to
(L)
OUT
and
10mV)
to
E
and
its
positive
lead
to
(L)
OUT
(of
the
TP
(A).
(When
adjusting
for
the
right
channel,
left
channel)
or
(R)
OUT
(of
the
right
channel)
and
connect
it
to
(R)
OUT
and
TP
(B)).
switch the power on. Gently turn R707 or R708 * Two or 3 minutes after the power is switched on,
little by little until the voltmeter indicates OV. turn R719 (R720 for right channel) very slowly in
Notes: the direction of INCREASE until the voltmeter
*
Leave
it
about
3
to
5
minutes
and
check
it
again.
If
shows
a
value
of
10mA
(approx.
20mA
for
right
the
needle
moves
from
alignment,
repeat
the
same
channel).
;
procedural
adjustment.
*
After
completion
of
the
adjustment
to
both
channels,
* If the voltage deviates by more than 100mV, it check, again, the channel which was first adjusted. If
adversely
affects
the
distortion.
Much
care
as
possible
the
reading
is
out
of
alignment,
repeat
the
should be used to this adjustment. adjustment. (Two or three times of repeated
* The voltmeter can, also, be connected to the speaker adjustments will give a correct and reliable result.)
terminals.
* The voltmeter may deflect in either direction. Be
careful, especially, of the deflection toward the minus
(-} side.
3. Standard Gain
PHONO
+13.2dB | 0) | -13.848 1kHz: OdB
MIC 72+2dB 70+1.5dB 67+2dB MIC MIXING: MAX
VOLUME: MAX
SELECT SW: PHONO
Speaker Terminal: 892 Resistor
JA-S310
oe No. 2355

JVC JA-S310 Specifications

General

Brand	JVC
Model	JA-S310
Category	Amplifier
Language	English