Sharp DV-NC55S Service Manual page 28

DV-NC55S/H
DV-NC60H
8-22.REPLACEMENT OF THE CAPSTAN D.D.
(DIRECT DRIVE) MOTOR
• Remove the mechanism from the main PWB (refer to 8-
4 item 1 When removing the mechanism from the main
PWB ).
• Removal (Follow the order of indicated numbers.)
1. Remove the reel belt 1.
2. Remove the slow brake lever 2.
3. Remove the three screws 3.
3
Capstan D.D.
motor
1
• Reassembly
1. Taking care so that the capstan shaft does not contact
the mechanism chassis, set its position on the mecha-
nism chassis, and then install with the three screws 3.
2. Install the slow brake lever 2.
3. Install the reel belt 1.
Notes:
1. Before installing the capstan D.D. motor, confirm whether
an acetate tape (ZTAPEN120020E) is drawn on the
back of mechanism chassis.
Stick an acetate tape on the projection part of
the chassis.
Mechanism Chassis from the back.
2. After installing the capstan D.D. motor, be sure to rotate
the capstan D.D. motor and check the movement.
3. Set the tape, and check for the tape crease near the
reverse guide in the playback mode. Adjust the A/C
head and azimuth as stated in 8-21 item 2. If crease is
found, adjust as stated in 8-21 item 3.
Capstan D.D. motor
control PWB
Reel belt
2
Slow Blake Lever
Figure 8-37.
Capstan Motor Installation position.
Figure 8-38.
8-23. REPLACEMENT OF DRUM D.D. MOTOR
1. Set the ejection mode.
2. Withdraw the main power plug from the socket.
• Removal (Perform in numerical order.)
1. Disconnect the FFC cable 1.
2. Unscrew the D.D. stator assembly fixing screws 2.
3. Take out the D.D. stator assembly 3.
4. Unscrew the D.D. rotor assembly fixing screws 4.
5. Take out the D.D. rotor assembly 5.
Notes:
1. In removing the D.D. stator assembly, part of the drum
earth spring pops out of the pre-load collar.
Be careful not to lose it.
2. Install, so that the D.D. rotor ass'y and upper drum ass'y
mounting direction check holes align.
(Align the upper drum dent with the rotor hole.)
3. Be careful not to damage the upper drum or the video
head.
4. Protect the hole elements from shock due to contact with
D.D. stator or D.D. rotor ass'y.
5. After installation adjust the playback switching point for
adjustment of servo circuit.
2
4
5
Figure 8-39.
32
D.D. stator ass'y
3
1
FFC
4
D.D. rotor ass'y
Upper drum