Technics RS-B14 User Manual

i
|
RS-B14
|
©
Overall
gain
Condition:
Equipment:
е
Record/playback
mode
*
VTVM
*
AF
oscillator
*
Normal
tape
mode
*
ATT
*
Oscilloscope
*
Input
level
controls...
MAX
*
Resistor
(6009)
J
*
Standard
input
level;
*
Test
tape
МІС
...............
-72%3ав
(reference
blank
tape)
... QZZCRA for Normal
.
Test
equipment
connection
is
shown
іп
fig.
15.
Record/playback
1
2.
Insert
the
normal
reference
blank
tape
(QZZCRA).
ғи
3.
Place
UNIT
into
record
mode.
а
Bx:
4.
Supply
а
1kHz
signal
through
ATT
(-24dB)
from
AF
oscillator,
to
LINE
RE
TT
TS
IN.
oscillator
(BEER
Record
mode
5.
Adjust
ATT
until
monitor
level
at
LINE
OUT
becomes
0.4V+1
dB.
Қайы
6.
Playback
recorded
tape,
and
make
sure
that
the
output
level
at
LINE
—
*"«/Patex
OUT
becomes
0.4V+1dB.
=]
|
7.
If
measured
value
is
not
0.4V+1dB,
adjust
it
by
using
VR5
(L-CH)
or
S
E|
>
i
VR6
(R-CH).
Playback
mode
—
VIVM
Oscilloscope
8.
Repeat
from
step
(2).
Test
tape
Fig. 15
Q
Fluorescent
meter
Condition:
Equipment:
*
Record
mode
e
VTVM
*
AF
oscillator
*
Input
level
controls...MAX
*
ATT
*
Oscilloscope
*
Resistor
(6009)
. Make connections as shown (See fig. 16).
. In the recording pause mode, apply 1kHz (-24dB) to LINE
IN.
.
Adjust
АТТ
so
that
output
level
LNE
OUT
is
0.4V+1dB.
AF
oscilator
АТТ
мелу
Record
mode
УТУМ
—
Oscilloscope
.
At
this
time,
check
that
OdB
indicator
is
lighted
halfway
Fig.
16
(intermediate
brightness
between
full
brightness
and
light-
out:
See
fig.
17).
-:3
Г
ТОРЕК
10
+
$
3
4
(|
*
005
3]
+08
5.
It
the
indicator
is
not
lighted
halfway
as
described
in
step
4,
|
ТІЛЕДІ
£O № +
adjust
VR9
(L-CH),
VR10
(R-CH).
Шш
ШШШ
uibs
gx
6.
Repeat
adjustments
and
checks
at
steps
3,
4
and
5
two
or
three
times.
Fig.
17
ш ш шшшшшшшшшш
Ф
Dolby
NR
circuit
Condition:
Equipment:
*
Record
mode
*
VTVM
*
AF
oscillator
*
Dolby
NR
switch...IN/OUT
*
ATT
*
Oscilloscope
*
Dolby
NR
select
*
Resistor
(6009)
switch...B/C
Balance
control...Center
* input level controls... MAX
Record side
*
Check
of
the
Dolby-B
type
encoder
characteristics
.
Make
connections
as
shown
in
fig.
18.
.
Set
the
unit
to
the
record
mode.
(NR
select
switch
is
OUT.)
.
Apply
a
1kHz
signal
to
LINE
IN.
.
Adjust
the
ATT
so
that
the
output
level
at
TP3
(L-CH)
and
TP4
(R-CH)
is
12.3mV.
.
The
output
level
at
pin
21
should
be
OdB.
.
Set
the
NR
select
switch
to
B,
and
make
sure
that
the
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
IC6
(R-CH)
is
+6dB+2.5dB.
.
Set
the
NR
select
switch
to
OUT,
and
adjust
the
frequency
to5kHz.
The
output
signal
level
at
pin
21
should
be
OdB.
.
Set
the
NR
select
switch
to
B
and
make
sure
that
the
TP3
(L-CH)
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
IC6
(R-CH)
is
ТРА
(R-CH)
+
8dB+2.5dB.
*
Check
of
the
Dolby-C
type
encoder
characteristics
9.
Repeat
steps
1-5
above.
10.
Set
the
NR
select
switch
to
C
and
make
sure
that
the
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
IC6
(R-CH)
is
+
11.5dB«2.5dB.
AF
oscillator
ATT
"me
11.
Set
the
NR
select
switch
to
OUT
and
adjust
the
frequency
16
(R-CH)
VIE.
оваа
to
5kHz.
The
output
signal
at
pin
21
should
be
OdB.
.
12.
Set
the
NR
select
switch
to
C
and
make
sure
that
the
Fig.
18
output
signal
level
at
pin
21
of
IC5
(L-CH)
and
ІС6
(R-CH)
is
T
8.5dB+2.5dB.
со ч ость © ND —

Technics RS-B14 Specifications

General

Brand	Technics
Model	RS-B14
Category	Cassette Player
Language	English