Atari Tempest - Leaf Switch; Led; Start Switch

Tempest
ENCODE?
BLUE,
RE
&
VIOLET
1.
Leaf
Switch
Replacement
The
leaf
switches
operate
on 5
volts at a
very low
current.
Therefore,
pitting
of these
switches
would
be
extremely
rare.
Probably the
only
reason that
pit-
ting
would
occur is
very
high-humidity.
Don’t
burnish
the
switch
contacts.
Burnishing
them
removes
their
plating, thus
increasing the
cor-
rosion
of
the
contacts.
The best
method
of
cleaning
the
switch
contacts
is to
wipe
them
with
a
non-abra-
sive
surface.
A
business
card
works very
well.
To
replace a
leaf
switch,
remove
the
screw with a
Phillips-head
screwdriver—
see
Figure
10.
If the
black button
itself
needs to
be
replaced,
turn
the
stamped
nut with
a
wrench in a
counter-
clockwise
direction, as
seen
from the
inside
of the
control
panel.
The
black ring
on the
outside of the
control
panel should
not
spin, due to
its
design.
2. LED
Start-Switch
Replacement
The
light-emitting diode (LED) switches
on
the
control panel have
a
very
low
failure rate. In
case a
switch should
ever
be suspect, first test it per
the
description that follows. To replace
the
switch,
refer
to
Figures 10 and 11.
•
Remove
the wires from
the suspected
switch.
•
Set multimeter
to
ohms scale.
Set ohms scale
to
R x
1,
then zero
the meter.
•
Connect multimeter
leads
to appropriate LED
switch contacts
(see Figure 11 for
designation
of switch contacts
and meter lead
placement).
Check contacts
(push and release
the switch
button) for closed and
open continuity.
If the
contacts do not operate
sharply or always
remain closed or open,
then replace
the LED
switch
as
outlined
in Figure 10.
Reconnect the
wires as shown in Figure
11.
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