Sharp VC-780E Service Manual page 21

a
ca
a a
D.D. motor rotor
Note:
Secure the D.D. rotor assembly so that the
installation positioning holes in the D.D. ro-
tor assembly and lower drum match.
Figure 1-28.
REPLACEMENT OF D.D. (DIRECT DRIVE)
MOTOR
Note:
Ai
Put the unit in the cassette eject position.
Removal
Remove the six screws from the bottom panel
and remove the bottom panel.
. Disconnect the drum D.D. motor lead connector.
. Remove the two screws@ which hold the D.D.
rotor assembly in place, using a Phillips
screwdriver.
. Remove the D.D. rotor assembly.
Remove the three screws @ which hold the D.D.
stator assembly in place, using a Phillips
screwdriver.
. Remove the D.D. stator assembly.
21
(2) D.D. stator
VC-790ET
@ Reassembly
1. Place the D.D. stator assembly on top of the
lower drum.
2. Secure the D.D. stator with the three screws @
using a Phillips screwdriver.
Note:
Be careful not to scratch the core, windings or
Hall device.
3. Install the D.D. rotor assembly onto the drum
shaft.
Note:
Install the assembly directly onto the direction of
the shaft. (Refer to Fig. 1-29 for the installation
direction.)
4. Secure the D.D. rotor assembly with the screws
@.
. Connect the drum D.D. motor lead connector.
6. Install the bottom panel. with six screws.
Note:
Be careful) not to damage the upper drum or the
video head.
7. After replacement of the D.D. motor as shown
above, proceed with the adjustment of the
playback switching point.
wn
Notes:
1. Be careful not to damage the upper drum or
the video head.
2. Be sure that the Hall device and the D.D. stator
assembly are not damaged by the D.D. rotor
assembly or other parts.
(D D.D. rotor ass'y screw
Installation positioning hole
D.D. rotor ass'y
ass'y screw
Note:
Secure the D.D. rotor assembly so that the
installation positioning holes in the D.D. rotor
assembly and lower drum match.
D.D. stator ass'y
Figure 1-29.