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Panasonic JU-253-T

Panasonic JU-253-T
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(2) Step
between
specified
tracks
as
shown
in
the
FLAG
0
item
of
Table
8.1
(Turn
the
seek
delay
switch
on
the
exerciser
to
adjust
12
ms
seek.)
(3) Loosen
the
track
0 sensor screw and
adjust
until
the
waveform
on
the
oscilloscope appears
as
shown
in
Fig. 9.7.
,;.._----1-------1-----
VL
A B ADJUST
A:
B TO 1 : 1
Fig. 9.7 Track 0
Waveform
1
.!~illllll!lllt
1
~ll:~.'lil·-~·11~tlB-l!i.1/~~:
[
1]
Set
the
oscilloscope
as
follows.
Set
horizontal
deflection
to
1 ms/division.
CH1
:
ZP
EXT
: Step (No. 20 Pin
of
CMOSITTL
Adaptor)
(2) Step
between
specified tracks
as
shown
in
the
FLAGO
item
of
Table 8.1, (Turn
the
seek
delay
switch
on
the
exerciser
to
adjust
3 ms seek.}
(3) Loosen
the
screw
for
track
0 assembly
so
that
the
waveform
on
the
osciloscope is
as
shown
in
Figure 9.8
and
adjust
the
track
0 assembly
position
by
moving
it
back and
forth.
STEPLJ
3.0ms
Tzp
LJ
.1
O.Bms
Max
(Reference)
CP
Vcp
--------------'---------
GND
LEVEL
Fig. 9.8 Track 0
Waveform
(4) VoltagesfTimings
for
track
0
waveform
1.
Tzp
4.2ms
2.
VL
:;;;;
1.0V
3.
VH
~4.0V
4.
Vcp
~3.2V
-11
-

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