Sharp VC-A410U Service Manual page 21

4-15 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.
Azimuth screw
Spring
2
Figure 4-23.
• Replacement
1. Solder the removed PWB to the new head assembly.
2. Adjust the height from the A/C head arm (lower surface)
to the A/C head plate to 10.8mm with slide calipers. (3
places of azimuth screw section, tilt screw section and A/
New A/C head ass'y
Never touch the head
10.8mm
Figure 4-24.
Tilt screw
3
Height screw
1
Solder
A/C head PWB
A/C head plate
10.8mm
C head front section) (See the figure below.)
3. Align the left end of gear of A/C head arm with the
punched mark of chassis, tentatively tighten the screws
1 and 2 so as to ensure smooth motion of A/C head
arm. Tentative tightening torque must be 0.15 to 0.20
N·m (1.5 to 2.0kgf·cm).
1
2
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 4-18.)
21
3
Height screw
Left end of A/C head arm gear
Punched line mark on chassis
Figure 4-25.
VC-A410U
VC-H810U