Atari Tempest - Maintenance

Tempest™
Disassemble in the
order
indicated.
(Circled numbers
match the steps
described
below.)
Close the
control panel.
Remove the two set
screws in the con-
trol knob.
Open
the control
panel. Unplug
the four-pin harness
connector.
Remove
the carriage
bolts that
hold the encoder wheel
frame
to
the
control panel.
To Lubricate:
1. Loosen the two
socket-head screws that attach the
hub
to
the shaft.
2. Unsnap the bottom
clip ring. Pull the shaft up and
out
of the frame being careful not to drop the fly-
wheel.
3. Lightly lubricate the washer and the two nylon
bushings that snap into the top and bottom the the
frame. Apply Nyogel 779
to
a cotton swab for this
process.
To Replace
the Encoder Wheel:
4. Remove
the three
socket-head screws
that
attach
the top to the
bottom flywheel.
5.
Remove the
etched encoder wheel
and replace
it
with a new one.
Reassemble in
reverse, making
sure
that you center
the new wheel between
the
photo-
sensor device.
To Replace
the
Coupler
PCB:
6.
Remove
the two
socket-head screws,
lock
washers
and
hex nuts that
hold the
coupler PCB
to the
frame.
7 Remove
the
coupler PCB and
repair
as needed.
^
.*
I
PHOTOSENSOR
ENCODER
WHEEL
Figure 12
Encoder
Wheel
Maintenance
and
Repair
3. Encoder
Wheel Maintenance
and
Repair
The encoder-wheel control requires lubrication of
its bushings approximately
every
10,000
credits
and
as
you deem necessary.
To lubricate
or
repair
the
control, remove the control
from
the
control
panel
and
disassemble it
as
illustrated in Figure 12.
For lubrication,
use only
Nyogel 779
lubricant
(Atari part
no. 178027-001)
on the
two bushings
of
the
encoder-wheel
control.
For further
instructions
on how
to replace
the
coupler PCB
or the
encoder wheel,
see
Figure
12.
20