Sharp VC-90ET

VC-9OET
REPLACEMENT OF A/C (Audio/Control)
HEAD
AWN @
. Remove the cassette housing control assembly.
. Place the unit in the unloading mode, and
unplug the power cord..
Removal
. Loosen the tilt adjusting screw ©.
. Remove the azimuth adjusting screw @.
. Remove the A/C head screw ©.
. Unsolder the A/C head PWB soldered to the A/C
head assembly.
Note :
1.
2.
Remove the
A/C head screw. ( 3 al
Payattentionto __
the azimuth spring.
2
After replacement, be sure to perform the
adjustment
of
the
tape
drive
train
(See
page
24).
Under
any
circumstances,
avoid
touching
the
head. Clean the head, if touched with your
finger, with alcohol.
Take care that the azimuth spring does not fly
off when removing the A/C head screw.
Unsolder the A/C head PW8
soldered to the A/C head assembly.
A/C head PWB
Loosen the
tilt adjusting
screw,
1.
2.
AJC head height
adjusting nut
X position
adjusting nut
Figure 1-46.
Replacement
Solder
the
removed
A/C
head
PWB
onto
a
new
A/C
head
assembly.
The
A/C
head
assembly
is
attached
so
that
the
A/C
head
arm
and
A/C
head
plate
are
roughly
Parallel
to
each
other.
Solder
New AC head ass‘y
Never touch the head.
A/C head Plate
Figure 1-47.
22
Remove the azimuth
adjusting screw.
AIC head tilt
adjusting jig
AIC head plate
~ A/C head height
adjusting nut
AIC head
Roughly paraiiel
‘: AIC head arm
Figure 1-48.
@ Adjustment
[A/C head tilt angle]
1. Set the mechanism to the loading mode.
2. Place the A/C head tilt adjusting jig ©.
3.
Slowly
turn
the
tilt
adjusting
screw
@
with
a
screw
driver
until
there
is
no
gap
between
the
jig
and
the
A/C
head.
A piece of white paper
Pea
(for visuality of a gap)
Tilt adjusting
screw
(a)
| q Screw driver
y
AIC head
AIC head arm
(b)
Figure 1-49.