Sharp 13VT-N100 Service Manual page 30

13VT-N100
13VT-N150
13VT-CN10
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 and 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 spring out.
Azimuth screw
Spring
2
Figure 1-23.
• 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
below.)
New A/C head ass'y
Never touch the head
10.8mm
Figure 1-24.
3 Tilt screw
Height screw
1
Solder
A/C head PWB
A/C head plate
10.8mm
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
Figure 1-25.
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 32, 33.)
30
3
Height screw
Left end of A/C head arm gear
Punched line mark on chassis