Sharp vc-ga56z, Руководство по обслуживанию

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19
VC-GA56Z
VC-GH96Z
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.
• Replacement
1. Solder the removed PWB to the new head assembly.
2. Adjust the height from the A/C head arm (lower sur-
face) to the A/C head plate to 10.8mm with slide
calipers. (3 places of azimuth screw section, tilt screw
section and A/C head front section) (See the figure be-
low.)
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).
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.)
Figure 4-23.
Tilt screw
3
1
2
Spring
Height screw
Azimuth screw
Figure 4-24.
Solder
New A/C head ass'y
Never touch the head
A/C head plate
A/C head PWB
10.8mm 10.8mm
Figure 4-25.
1
3
2
Height screw
Left end of A/C head arm gear
Punched line mark on chassis