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VC-90ET
@ Reassembly
1. Set the new drum.
2. Place the relay PWB as shown in the figure and
solder it securely.
Notes:
1) Before setting the drum, make sure that there
is No scratches or dust on the end surface and
circumference of the disk.
2) Before setting the drum, make sure that there
is no scratches or dust on the internal surface
and end surface of the upper drum.
Install the upper drum onto the disk with such
care that the upper drum is not tilted.
4) When reassembling these parts, do not allow
dust and dirt to come between the disk and the
upper drum.
5) Do not use excessive force when driving in the
screws.
1. Fasten the upper drum in place with the two
setscrews.
2. Solder the leads quickly and carefully without
touching adjacent patterns.
3. Finally be sure to check the tape drive train
adjustment
and the following
electrical
adjustments.
* Adjustment of the playback switching point
* Checking and adjustment of the X-position
* Adjustment of SP and EP slow tracking preset
3
—
Figure 1-76.
REPLACEMENT OF D.D. MOTOR
1.
2.
WAaWN
setscrew
D.D. stator ass'y (+)
i
7
Put the unit in the eject mode.
Unplug the power cord from the wall socket.
Removal
(Follow the order of the indicated
numbers.)
(Reverse the order in reassembly.)
. Remove the FFC.
. Remove the D.D. rotor assembly setscrews.
. Pull out the D.D. rotor assembly.
. Remove the D.D. strator assembly setscrews.
. Pull out the D.D. stator assembly.
Installation positioning
hole
D.D. rotor ass'y
C) Frc
(Full flat cable)
Figure 1-77.
N
otes:
1) Be careful not to damage the upper drum and
the video head.
switching point.
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