Sharp VC-S2000HM, Service Manual

Page: 18 / 123

18
VC-S2000HM
Figure 4-24.
• 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.)
3. Align the left end of gear of A/C head plate with the
punched mark of chassis, tentatively tighten the screws
1
and
2
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).
REPLACEMENT OF A/C (Audio/Control) HEAD
1. Remove the cassette housing control assembly.
2. In unloading state unplug the power cord.
• Removal
1. Remove the screws
123
, 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
3
, take care so that the
spring may out.
New A/C head ass'y
A/C head PWB
2
Spring
1
Solder
❈
Never touch the head
10.8mm 10.8mm
Azimuth screw
Height screw
Tilt screw
A/C head base
Figure 4-25.
Note:
1. If the screws
1
and
2
are tighten tentatively too loose,
the azimuth and height of A/C head may change when
they are finally tightened. Therefore care 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.)
Punched line mark on chassis
Left end of A/C head plate gear
1
2
3
Height screw
Figure 4-23.
3