JVC TD-W718BK - Page 24

TD
-
W
717
TNC
/
J
TD
"
W
718
BKA
/
B
/
E
/
EN
/
G
/
U
/
UT
Item
Conditions
Adjustment
and
Confirmation
Standard
Adjusting
12
Checking
erasing
coefficient
1
)
Apply
a
400
Hz
,
+
20
dBs
signal
to
the
LINE
IN
terminals
.
2
)
Perform
recording
with
the
signal
enhaned
by
20
dB
3
)
Era
$
e a
part
of
the
recording
.
4
)
Measure
the
output
difference
between the
erased
part
and
non
-
erased
part
to
compare
with
an
electronic
voltmeter
.
For the
measurement
using
a
metal
tape
,
connect
a
band
pass
filter
between
the
deck
and the electronic voltmeter
.
More than
55
dB
Tape
deck
(
recording
,
erasing
)
Input
(
1
kHz
)
(
1
kHz
)
Electronic
voltmeter
^
Band
pass
filter
22
(
No
.
4358
)