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JVC UX-A5 - Adjustment and Confirmation Items List; Tape Playback Adjustments and Confirmations

JVC UX-A5
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UX-A5
A/B/E/G/GVEN
@
Adjustment
and
Confirmation
Items
Mesurement
zi
:
:
Select
Adjustment
Confirmation
of
|
VTT752
Confirm
the
Lch
output
by
replaying
the
side
A
of
TAPE
Land
R
the
test
tape
VTT752.
Next,
confirm
the
Rch
out-
channels
put
by
replaying
the
side
B.
Confirmation
of
|
VTT704
(1)
Replay
the
test
tape
VTT704
(12.5
kHz).
TAPE
Whenever
the
head
is
changed,
the
azimuth
should
be
readjusted.
head
angle
(12.5
kHz)
(2)
Adjust
the
head
angle
so
that
the
phase
Adjustment
of
difference
becomes
miminum
at
maximum
out-
output:
DOLBY
put
in
both
the
forward
and
reverse
directions.
test
point
Adjustment
V1TT712
©
Replay
the
test
tape
VTT712
(3
kHz)
in
forward
TAPE
VR501
and
confirma-
|
(3
kHz)
direction.
With
VR501,
adjust
the
output
so
that
tion
of
tape
Adjustment
of
the
reading
of
frequency
counter
becomes
speed,
wow
output:
DOLBY
3,000+
10
Hz.
and
flutter
test
point
e
Next,
replay
the
test
tape
VTT712
(3
kHz)
in
reverse
direction.
With
VR501,
adjust
the
output
so
that
the
reading
of
frequency
counter
becomes
3,000+60
Hz.
©
Wow
and
flutter:
0.2%
(JIS
WRMS)
or
less
Confirmation
of
|
VTT739
Replay
the
test
tape
VTT739
with
its
chromium
|
TAPE
——-
detector
click
being
cut
out,
and
confirm
that
the
deveiation
is
(within)
12.5
kHz
with
reference
to
1
kHz.
AUTO.
tape
select
Adjustment
of
output:
DOLBY
test
point
VTT724
(1
kHz)
Adjustment
of
output:
DOLBY
test
point
TMT735
and
VTT739
Adjustment
of
output:
DOLBY
test
point
Replay
the
test
tape
VTT724.
Lech:
VR101
Measurement
of
output:
With
the
following
volumes,
Rch:
VR201
adjust
the
output
level
so
that
it
becomes
—
11
Bs
at
the
DOLBY
test
point:
Loh:
VR101,
Roh:
VR201
Replay
the
test
tapes
TMT735
and
VTT739,
and
conform
that
the
output
at
the
DOLBY
test
point
becomes
as
follows
with
reference
to
1
kHz:
63Hz
:
-—2dBt4dB
12.5
kHz:
O
dB+3
dB
After
selecting
to
the
metal
tape
mode,
confirm
that
the
output
in
the
case
of
12.5
kHz
is
within
-—4+
dB
with
reference
to
that
in
the
case
of
the
normal
tape
mode.
Adjustment
of
replay
output
level
Confirmation
of
replay
frequency
characteristics
Adjustment
TS8
and
TS10
|(1)
While
inputting
Ref.
—20
dB
from
AUX
IN,/TAPE/Normal!
bch:
VR103
and
confirma-
|
Adjustment
of
perform
recording
and
replay
with
the
normal
Rech:
VR203
tion
of
replay
|
output:
DOLBY
tape
TS8.
At
this
time,
confirm
the
output
with
frequency
test
point
VR103
(Lch)
and
VR203
(Rch)
so
that
the
devia-
tion
between
1.25
kHz
and
12.5
kHz
at
the
DOLBY
test
point
becomes
0+1
dB.
TS8,
TS10
and
While
inputting
Ref.
1
kHz
to
AUX
IN
perform
TS11
recording
and
replay
with
the
normal
tape
TS8.
Adjustment
of
|(2)
Adjust
Lch
and
Rch
respectively
with
VR102
output:
DOLBY
and
VR202
so
that
the
output
at
the
DOLBY
test
test
point
point
at
this
time
becomes
0+1.0
dB.
(3)
Next,
perform
recording
(and
replay)
with
the
chromium
tape
TS10
and
metal
tape
TS11
according
to
the
same
procedures
in
the
Step
(1).
(4)
Confirm
that
the
DOLBY
test
point
output
at
this
time
is
O+3
dB.
TAPE/Normal
Lech:
VR102
TAPE/
Rch:
VR202
METAL
CrO2
Adjustment
of
recording
and
replay
output
(No.
1857)
17

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