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JVC RC-XC3BK

JVC RC-XC3BK
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RC
—
XC3BK
B/E/EN/G/GI
i
Amp.
Section/Cassette
Mechanism
Section
Test
Tape
Adjustment
and
Confirmation
Methods
Stand.
values|
Adjust
Adjustment
of
head
|
Test
tape
1.
Play
the
test
tape
VTT703
(10
kHz).
Within
2
dB
Perform
this
:VTT703
(10
kHz)
|
2.
With
the
head
azimuth
adjusting
screw,
adjust
|
from
the
peak
|
adjustment
Measurement/
the
replay
output
to
within
2
dB
from
the
peak
|
point
and
whenever
Metering
output
point
and
the
phase
difference
to
minimum.
minimum
the
head
terminal
After
adjustment,
lpck
the
head
azimuth
phase
has
been
‘Speaker
terminals,
adjusting
screw
by
as
much
as
half
turn.
difference
changed.
3. In
case
the
measurement
values
deviate
from
the
standard
values,
perform
fine
adjustment
with
the
head
azimuth
adjusting
screw.
L
and
R
speakers
(Load
resistance
14Q)
q
mise
ALLS
BL
LEN
REV
FWD
HA
Test
tape
‘VTT712
(3
kHz)
Measurement
.
With
VR750,
adjust
the
tape
speed
by
playing
|
Tape
speed
the
test
tape
VTT712
(3
kHz)
after
it
has
been
|
:Within
3,010
winded
so
that
the
frequency
counter
reading
|
+10Hz
Adjustment
of
tape
speed
and
check
of
wow
flatter
output
terminal
is
3,010
+
10
Hz,
and
confirm
that
the
Wow
flatter
:Speaker
terminal
frequency
at
high
speed
is
within
5,000~
:0.28%
or
more
5,800
Hz.
(JIS
WTD)
2.
Confirm
that
the
wow
flatter
is
not
higher
than
0.28%
(JIS
WTD).
While
replaying
the
test
tape
VTT724,
confirm
that
the
speaker
terminal
level
when
the
volume
is
positioned
at
29~30
becomes
0
dBs
+
3
dB.
Confirmation
of
Test
tape
OdBs
+
3dB
replaying
output
‘VTT724
(1
kHz)
level
Measurement
output
terminal
:Speaker
terminal
Test
tape
Confirmation
of
The
level
deviation
of
the
frequency
level
when
1k/63Hz
replaying
:VTT739
(63
Hz,
the
test
tape
VTT739
(63
Hz,
1
kHz
and
10
kHz)
|:
—1+4dB
frequency
1
and
10
kHz)
is
replayed
should
be
within
-
1+
4
dB
at63Hz
|
1k/10kHz
characteristics
Measurement
and
+2
+
4
dB
at
10
kHz
with
reference
to
1
kHz.
|
:+2
+
4dB
output
terminal
:Speaker
terminal
'101.1kHz
+
0.1kHz
Adjustment
of
bias
oscillator
frequency
Test
tape
‘AC
-
225
Measurement
output
terminal
‘Secondary
circuit
of
oscillator
coil
(erasing)
1.
Connect
the
frequency
counter
[(insert
a
470
k
Q
resistor
in
series)
or
TP
(any
serial
resistor
is
not
needed)]
to
the
secondary
terminal
of
the
eraser
L310.
2.
After
loading
the
test
tape
(AC
-
225)
into
the
deck,
keep
the
tape
under
the
[RECORD]
and
[PAUSE]
conditions.
3.
With
L310,
adjust
the
reading
of
frequency
counter
to
101.1
KHz
+
0.1
KHz
when
the
tape
is
recorded.
Normal
tape
L:
VR101
:+2dB+1dB
|
R:
VR202
Adjustment
of
recording
and
replaying
frequency
characteristics
Reference
.
While
repeatedly
applying
reference
frequency
frequency
signals
of
1
KHz
and
10
KHz
to
the
[AUX
IN]
71.25
kHz
and
terminal,
record
the
signals
in
a
normal
tape.
10
kHz
(REF.
level:
|
2.
With
VR101
and
VR202,
adjust
the
deviation
-
20
dB)
between
the
1
KHz
and
10
kHz
speaker
Measurement
input
terminal
outputs
to
become
+2
+
1
dB
when
terminal:[AUX
IN]
the
recorded
section
has
been
replayed.
terminal
3.
Similarly
in
the
cases
of
the
chromium
tape
Measurement
AC514
and
metal
tape,
confirm
that
the
output
terminal
deviations
are
within
+2
+
3
dB
and
+2.5
‘Speaker
terminal
+
3
dB,
respectively.
Test
tape
‘AC-
225
Test
tape
Confirmation
of
.
While
inputting
a
1
KHz
reference
frequency
L:
VR102
recording
and
:
AC-
225
level
of
-
20
dB
to
the
[AUX
IN]
terminal,
R:
VR202
replaying
Input
terminal
record
and
replay
the
frequency
level
in
the
sensitivity
:{AUX
IN]
terminal
tape
AC-
225,
and
confirm
that
the
recording
Output
terminal
and
replaying
levels
are
within
0.5
+
3
dB
with
:Speaker
terminal
reference
to
the
replaying
level
of
VTT724.
Reference
frequency
:400
Hz
(REF.
level
:-20
dB)
(No.
1991)
43

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