
|
TC
-K222ESA/K890ES
SECTION
2
ELECTRICAL
ADJUSTMENTS
*
Refer
to
page
6
for
Adjustment
Location.
1.
Adjust
the
following
in
the
order
of
listing.
(Adjust
the
recording
system
after
completion
of
adjusting
the
playback
system,
in
general.)
2.
Adjustments
and
measurements
should
be
performed
for
each
channel
unless
otherwise
noted.
3.
For
simultaneous
recording/playback,
input
a
signal
into
the
line
and
set
the
equipment
to
recording
state
to
change
the
monitor
to
the
tape,
immediately
playback
the
recorded
signal
and
issue
it
from
the
line
output.
¢
Switch
position
DOLBY
NR
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OFF
MPX
FILTER
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OFF
TIMER
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OFF
MONITOR
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TAPE
HX
PRO
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OFF
CALIBRATION
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OFF
CD
DIRECT
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OFF
BIAS
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CENTER
CLICK
REC
LEVEL
won
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CENTER
CLICK
BALANCE
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CENTER
CLICK
*
Specified
recording
position
Adjust
knobs
REC
LEVEL
(RV591)
and
BALANCE
(RV592)
so
that
the
following
specified
input/output
signal
level
are
obtained.
Recording
state
AF
OSC
10kQ
O
Attenuator
Input
terminal
Input
signal
level
0.25V
(—10dB)
LINE
OUT
47kQ
0.44V
(—5dB)
Torque
Adjustment
1.
Set
the
torque
measuring
tape
CQ-102C
and
set
the
equipment
to
playback
state.
Adjust
RV801
so
that
the
torque
meter
indicates
40
+
3
g.cm.
2.
After
the
completion
of
the
adjustments,
measure
back
tension
and
FF/REW
torques
and
check
that
the
following
specifications
are
satisfied.
CQ-102C
FWD
CQ-102C
back
tension
CQ-201B
70
-
120g-cm
—
3
—-
Tape
Speeds/Wow
Checking
Procedure:
‘Standard
adjustment
tape
Frequency
counter
WS-48B
(3kHz
0dB)
WOW
&
WOW
meter
47kQ
oe
[=
Line
output
L
or
R-CH
1.
Playback
the
top
section
of
the
standard
tape
and
measure
its
output
frequency
and
WOW
value.
2.
Turn
the
standard
tape
upside
down,
measure
the
same
values
and
check
differences
between
both
measured
values.
(Difference
between
the
top
and
the
end
of
the
tape)
Adjustable
limits:
TAPE
SPEED
deviation
:
2,990
-
3,010
Hz
or
less
TAPE
SPEED
variation
width
:
2,990
-
3,010
Hz
or
less
:
0.04%
or
less
WOW
(WRMS)
MPX
Filter
Checking
Conditions:
DOLBY
NR
switch
:
OFF
MPX
FILTER
switch
:
OFF
Procedure:
1.
Mode:
Stop
state
AF
OSC
¥
Attenuator
|
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|
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Line
output
Line
input
315Hz,
0.5V
(—3.8dB)
2.
Apply
the
signal
of
315Hz,
0.5V
(—3.8dB)
and
set
REC
LEVEL
and
BALANCE
so
that
the
line
output
level
becomes
0.5V
(—3.8dB).
3.
Apply
the
signal
of
19kHz,
0.5V
(—3.8dB)
and
measure
the
line
output
level.
Adjustable
limits:
DOLBY
NR
switch:
B
or
C
MPX
FILTER
switch:
Line
output
level
upon
ON
315Hz:
Within
0.45
to
0.56V
(within
—2.8
to
—4.8dB)
19kHz:
0.015V
(—33.8dB)
or
less