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record /erase
Paint ink
over these
parts.
SCrews.
Play back the alignment tape (J-19-A2).
Make
the
azimuth
and
angle
adjustments.
See
page
28.
head
incorrect
aN
ty
RSsssy)
adjusting screw
Fig. 3-25.
Head zenith and height adjustment
4,
tape guide (2)
for FWD _ tape guide (3)
.
record/erase
playback
tape pole (1)
head
head
shifter arm (L)
After the ink dried, run the tape in the FWD
direction for 20 to 30 seconds. Watch the ink
on the core fading away. When the same wide a-
mount
of
the
faded
away
part
cannot
be
obtained
at every
point, turn the zenith and
height adjusting screws in the direction shown
by the arrows. See Fig. 3-25.
Repeat this step several times until the satisfied
result is obtained. After the adjustment clean
the core with a soft cloth dampened
with de-
natured alcohol.
For the record head tracking adjustment, con-
nect
a VTVM
and a 100 kQ resistor in parallel
with
the LINE
OUT
jack, deliver
the
1 kHz
signal
(—60
dB)
to
the
MIC
jack.
Set the
MONITOR
switch to the TAPE
position. Place
the
unit
in a normal
stereo
record
mode.
Turn the record head zenith and height adjust-
ing screws in the same amount of the same di-
rection
so that the same
maximum
output
can"
be obtained at both channels.
Play back
the alignment
tape (J-19-A2),
and
make
the playback azimuth adjustment again.
adjusting
screw
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B)
Make
the playback level and equalizer adjust-
ments. See page 29 and 30.
Apply
lock
paint
to
the
adjusting
screws.
Record/Erase
Head
Replacement
Remove
the azimuth
adjusting screw and the
head holding screw (with spring). Replace the
head with the mounting plate. Do not move the
zenith and height adjusting screws.
Make
the
record
head
azimuth
adjustment.
See
page 30.
Paint
the record/erase head
cores with ink as
shown in Fig. 3-25.
After the ink dried, run the tape in the FWD
direction for 20 to 30 seconds. Watch the ink on
the core fading away. When
the ink does not
fade away
in the same wide amount
at every
point,
turn
the
zenith
and
height
adjusting
screws
in the direction shown by the arrows.
See
Fig. 3-25.
Repeat
this step several times
until
the
satisfied
result
is obtained.
After
adjustment
clean the cores
with a soft cloth
dampened with denatured alcohol.
Make the record head azimuth adjust ment again.
See page 30.
Make
the record
head
track
adjustment.
See
page 31.
Make
the record
bias adjustment,
overall fre-
quency
response and erase ratio
Measure ment.
Make sure that the positioning relation between
the head
core
and
the
tape
is correct.
See
Fig. 3-26.
Apply
lock
paint
to
the
adjusting
screws.
For
REV
Direction
The tape guide (4), which is used for thy REV
tape path adjustment, should not be adjustedin the
head replacement.
The adjustments after playback and record/eras:
head
replacement are the same in procedure as in th: FWD
head replacement.
tape guide (4)
for REV
A
tape guide (5)
\ playback head
4
|
ere erasé | tane guide (6)
ses
shifter a-m(R}
Ch
rare by ee |
Fig. 3-26.
Head adjustment
— 23 —
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