Sharp DV-NC70U Service Manual page 32

DV-NC70U/C
DV-NC72U
8-20 REPLACEMENT OF THE CAPSTAN D.D.
(DIRECT DRIVE) MOTOR
• Remove the mechanism from the set.
• Removal (Follow the order of indicated numbers.)
1. Unsolder loading motor wire and drum FFC.
2. Remove the reel belt 1.
3. Remove the three screws 2.
2
Capstan
D.D. motor
• 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 2.
2. Install the reel belt.
3. Solder loading motor wire and drum FFC.
Notes:
1. After installing the capstan D.D. motor, be sure to rotate
the capstan D.D. motor and check the movement.
2. 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 8-19 item 2.
Main chassis
Solder loading
motor wire
Solder drum FFC
1 Reel belt
Figure 8-33.
8-21 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 Drum D.D. stator assembly fixing screws 2.
3. Take out the Drum D.D. stator assembly 3.
4. Unscrew the Drum D.D. rotor assembly fixing screws 4.
5. Take out the Drum D.D. rotor assembly 5.
Notes:
1. In removing the Drum 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 Drum 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
Drum D.D. stator or Drum D.D. rotor ass'y.
5. After installation adjust the playback switching point for
adjustment of servo circuit.
2
4
32
3 Drum D.D.stator ass'y
1
4
FFC
5 Drum D.D. rotor ass'y
Upper drum
Figure 8-34.