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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 to remove
them from Capstan D.D. motor control PWB.
2. Remove the reel belt 1.
3. Remove the three screws 2.
2
Capstan
D.D. motor
1 Reel belt
Figure 8-33.
• 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 1.
3. Solder loading motor wire and drum FFC to the capstan
D.D. motor control PWB.
Notes:
1. After installing the capstan D.D. motor, be sure to rotate
the capstan D.D. motor and check the movement.
2. Load a tape, and check for wrinkles on the tape near the
reverse guide in the playback mode. Make adjustments
according to "2. Adjustment of A/C head height and
azimuth" in "8-19. ADJUSTMENT OF TAPE DRIVE
TRAIN". If wrinkles are found, make adjustments
according to "3. Tape run adjustment" in the same
section.
3. When soldering the FFC and the loading motor wires, do
not scatter solder over the magnet of the capstan rotor.
Main chassis
Solder loading
motor wire
Solder drum FFC
Capstan D.D. motor
control PWB
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 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
37
DV-NC65H/S
DV-NC70H
3
Drum D.D.stator ass'y
1
4
FFC
5
Drum D.D. rotor ass'y
Upper drum
Figure 8-34.
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