Teac BX-500 - Adjustments and Voltage Conversion; Before Adjustment Procedures; Mid-Point Potential Adjustment

BX-500/BX-300
|
3
ADJUSTMENTS
AND
VOLTAGE
CONVERSION
3.1
BEFORE
ADJUSTMENT
(Do
not
apply
AC
power)
1.
Set
the
VOLUME
control
to
MIN
and
SPEAKERS
selector
to
OFF.
2.
Set
the
semi-fixed
variable
resistors
at
the
following
positions.
R133/R233
(BX-500)
R124/R224
(BX-300)
R139/R239
(BX-500)
R130/R230
(B
X-300)
At the center of full turning range
Fully counter-clockwise
3-2.
MID-POINT
POTENTIAL
ADJUSTMENT
1.
Depress
POWER
switch
to
ON.
2.
Connect
the
DC
voltmeter
between
T.P-5
(for
L-ch)
or
T.P-6
(for
R-ch)
and
GND.
3.
Adjust
R133/R233
(BX-500)
or
R124/R224
(BX-300)
so
that
the
voltmeter
indicates
0
V
+
10
mV.
Note:
A
differential
voltmeter
is
preferable.
OC VOLTMETER
TA-1068