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NOTE
Since the heads are factory aligned on
their mounting plates, these components
should be replaced as a unit.
Installation
Reverse removal procedure.
4.9.6 CAPSTAN MOTOR REPLACEMENT
1.
Disconnect capstan motor's molex connector.
2.
Detach Transport Electronics board (four nuts).
3.
Detach front and side panel. (Note screw lengths
to facilitate replacement.)
4.
From top of transport, remove 3/32 inch Allen
screw fastening capstan shaft mounting assembly
to chassis. Capstan shaft can now be moved,
permitting access to capstan motor screws.
5.
Remove capstan motor mounting screws and lift
motor out of chassis.
Installation
Reverse removal procedure.
NOTE
The motor shaft bevel gear must be per-
fectly centered with respect to the cap-
406-0331-700
stan bevel gear before the capstan motor
mounting screws are tightened. Figure
4-2 illustrates bevel gear centering.
Bevel Centering
1.
Replace the capstan shaft mounting bl.ock. Mount
the capstan motor in pOSition but leave the mount-
ing screws loose.
2.
From the front of the machine, sight down both
edges of the capstan shaft mounting block, lining
them up with the edges of the capstan shaft. (See
Figure 4-2.)
Note the amount of motor shaft
bevel gear visible from both sighting positions.
3.
Adjust motor position until the same amount of
motor shaft bevel is visible from both sighting
positions. (See Figure 4-2.) Then tighten the
capstan motor mounting screws.
4.10 MAINTENANCE TOOLS
In addition to normal electronic tools and test gear
(oscilloscope, voltohmmeter, etc.) the following
items should be available for service and repair:
Set of nut drivers or open end wrenches,
Phillips and standard slot-head screwdrivers,
Maintenance Kit, Kennedy PN 198-2324-001:
Head cleaner
Hex socket keys 7/64", 5/32", 1/8", 3/32"
Lint-free swabs
CAPSTAN SHAFT
".
)
NOTE: Model 331 is in upside
down position.
CAPSTAN SHAft MOUNTING BLOCK
110-0118
Figure 4-2. Motor Shaft Bevel Centering
4-7
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