Technics RS-B14 User Manual

RS-B14
©
Playback
frequency
Condition:
Equipment:
response
*
Playback
mode
*
VTVM
*
Normal
tape
mode
*
Oscilloscope
* Test tape...QZZCFM
1. Test equipment connection is shown in fig. 2.
2.
Playback
the
frequency
response
portion
of
test
tape
|
Playback
frequency
response
chart
(022СЕМ):
3.
Measure
output
level
at
315Hz,
12.5kHz,
8kHz,
4kHz,
1kHz,
amt
ШЕШІНЕ
ne
250Hz,
125Hz
and
63Hz,
and
compare
each
output
level
ІШ;
ИСЕН
9%
ul
with the standard frequency 315Hz, at LINE OUT.
4.
Make
measurements
for
both
channels.
ИН
СШ
5.
Make
sure
that
the
measured
values
are
within
the
range
|
-
=
=
ag
specified
in
the
frequency
response
chart.
(Shown
in
fig.
8).
ШІ
ao
ІШ
Sat
=
63H H н: H2 н: н: z
Fig. 8
© Playback gain Condition: Equipment:
* Playback mode * VTVM
* Normal tape mode * Oscilloscope
* Test tape...QZZCFM
1. Test equipment connection is shown in fig. 2.
2. Playback standard recording level portion on test tape (QZZCFM 315Hz) and, using VTVM, measure the
output level at LINE OUT.
3. Make measurements for both channels.
[ Standard value: 0.4V+1dB |
гар.
.
If
the
measured
value
is
not
within
the
standard,
adjust
VR1
(L-CH)
or
VR2
(R-CH)
(See
fig.
1).
B After
adjustment,
check
"Playback
frequency
response"
again.
@ Erase current Condition: Equipment:
* Record mode • VTVM
* Metal tape mode * Oscilloscope
Erase head
. Test equipment connection is shown in fig. 9.
. Place UNIT into metal tape mode.
. Press the record and pause buttons.
. Read voltage on VTVM and calculate erase current by following
formula:
AON-
Record mode
R84 (12
Voltage across resistor R84 Fe
1 (Q)
Standard value: 155+15mA (Metal)
Erase current (A) =
5. If the measured value is not within the standard value adjust it by
following the adjustment instructions.
Adjustment
* |f the erase current is more than 170mA, cut the jumper wire (See fig. 1).

Technics RS-B14 Specifications

General

Brand	Technics
Model	RS-B14
Category	Cassette Player
Language	English