DV-NC55 (serv.man7). Adjustment, replacement and assembly of mechanical units - Sharp DVD Service Manual (repair manual). Page 14

• 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 A/
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. Remove the cassette housing control assembly.
2. In unloading state unplug the power cord.

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

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 8-21.)

1

2

3

Height screw

3

Left end of A/C head arm gear

Punched line mark on chassis

Tilt screw

Azimuth screw