Sharp VC-FH3GM/SM Serviceanleitung Seite 18

VC-FH3GM/SM
VC-FH5GM.
REPLACEMENT OF A/C (Audio/Control) HEAD
1. Remove the cassette housing contro! assembly.
2. In unloading state unplug the power cord.
« Removal
1. Remove the screws ()@)@), Azimuth screw, Tilt screw.
2. Unsolder the PWB fitted to the A/C head.
Notes:
1. When replacing, never touch the head. If you touched,
clean with the cleaning liquid.
2, When removing the screw @), take care so that the
spring may out.
Tilt screw
Azimuth screw
Figure 4-23.
e Replacement
1. Solder the removed PWB to the new head assembly.
2. Adjust the height from the A/C head plate (lower surface)
to the A/C head base to 10.8mm with slide calipers. (3
places of azimuth screw section, tilt screw section and
hight screw section) (See the figure below.)
Solder
New A/C head ass'y S)
a | A/C head PWB
*kNever touch the hea
A/C head base
10.8mm
Figure 4-24,
18
3. Align the left end of gear of A/C head plate withthe
'punched mark of chassis, tentatively tighten the screws
-@ and @)so as to ensure smooth motion of A/C head
plate. Tentative tightening torque must be 0.15 to 0.20
N-m (1.5 to 2.0kgf-cm).
Left end of A/C head plate gear
Punched line mark on chassis
Figure 4-25.
Note:
1. Ifthe screws (D and ©) are tighten tentatively too loose,
the azimuth and height of A/C head may change when
they are finally tightened. Therefore caré must be taken.
2. After completion of A/C head be sure to adjust tape
running. (Execute the running adjustment by the method
described in Page 20, 21.)