Teac BX-550 - Adjustments; Before Adjustment Procedures; Mid-Point Potential Adjustment

BX-550/B8X-330
4 ADJUSTMENTS
4-1
BEFORE
ADJUSTMENT
(Do
not
apply
AC
power)
1.
Set
the
VOLUME
control
to
MIN
and
the
SPEAKERS
selector
to
OFF.
2.
Set
the
semi-fixed
variable
resistors
to
the
following
positions.
R133/R233
(BX-550)
R124/R224
(BX-330)
R139/R239 (8X-580)| Be te ata Gta
R130/R230 (BX-330) . whore
| At the center position
4-2.
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-550)
or
R124/R224
(BX-330)
so
that
the
voltmeter
indicates
0
V
+50
mV
DC.
Note:
A
differential
voltmeter
is
preferable.
DC
VOLTMETER
Bie
ee
i)
.
Fig. 2