Technics RS-BX828

RS-BX828
PLAYBACK
GAIN
ADJUSTMENT
1.Playback
the
gain
adjusted
portion
(315
Hz,
0
dB)
of
the
test
tape
(QZZCFM).
2.Adjust
VR3
(L-CH)
and
VR4
(R-CH)
so
that
the
output
is
within
the
standard
value.
Standard
value:
0.4V+0.5dB
Fig.
8
LINE QUT
PLAYBACK
FREQUENCY
RESPONSE
1.
Playback
the
frequency
response
portion
(315Hz,
12.5kHz~63Hz,
—20dB)
of
the
test
tape
(QZZCFM).
2.
Assure
that
the
frequency
response
is
within
the
range
shown
in
Fig.
10
for
both
L-CH
and
R-CH.
+5dB
+308
+208
008
— 208
—3d8
LINE QUT
508
Fig. 10
AC
BIAS
TRAP
ADJUSTMENT
1.
Insert
the
Metal
blank
test
tape
(QZZCRZ)
and
set
the
unit
to
the
Record
mode.
2.
Adjust
L1
(L-CH)
[[L2
(R-CH)]]
so
that
the
output
voltage
between
TP3
(TP4)
and
GND
is
less
than
the
minimum
value.
R/P Head <> }
Lt {L-GH), L2 (RCH)
ERASE
CURRENT
ADJUSTMENT
4.
Insert
the
Metal
blank
test
tape
(QZZCRZ)
and
set
the
unit
un
to
the
Record
Pause
mode.
2.
Adjust
VR303
so
that
the
output
between
TP1
and
GND
ERASE
HEAD
+
EVM
is
within
the
standard
value.
.
R308
192
(Electronic
Standard
value:
190+5mA
(Metal)...EVM
Reading:
190+5mV
Fig.
12
Voltmeter)
HX
PRO
ADJUSTMENT
4.Insert
the
Metal
blank
tape
(QZZCRZ)
and
set
the
unit
to
the
Record
Pause
mode.
2.
Connect
a
DC
voltmeter
across
TPS
(L-CH)
and
GND,
TP6
(R-CH)
and
GND.
3.
Adjust
L301
(L-CH)
and
L302
(R-CH)so
that
the
output
is
the
minimum
value.
o%