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s. ASSEMBLYADJUSTMENTS
I. General
All switch assemblies consist of leaf springs, contacts,
separators, plastic tubing and screws to hold them to the
mounting surface on the relay frame. Before attempting
to adjust a switch assembly, make sure that these screws
are tight. If not, tighten screw closest to the contact
end of the leaf spring first.
This will prevent the
assembly from being secured in such a manner that the
leaf
springs tend to fan out. ' In general, all leaf springs
are adjusted for a 1/3211 gap in the open position and .010"
overtravel or wipe in the closed position. All contacts
should be in good condition. Unless otherwise instructed,
they should be dry or non-lubricated. All contacts should
be free of dust and
dirt. Tranish can be removed with a
contact file followed by a burnishing tool. Severely
pitted contacts must be replaced as an assembly. In gen-
eral, contacts need be cleaned or replaced and adjusted
when they are found to be a source of game malfunction.
2. Relays
All of the above applies. Relay contacts are operated dry.
Beyond the norml 1/32" gap adjustment, relays with a self-
holding circuit must be adjusted such that the self-holding
contacts make just before the other
contacts (adjust to
.025" gap). Care in making this adjustment prevents false
credi ting and false scoring during the game.
The game-over relay is an example of an interlock relay.
Interlock relays are adjusted for a .010" gap between the
trip and latch coil armatures in the trip position and a
.010" gap between the nylon on the latch coil armature
and the trip coil armature in the latch position. If an
adjustment is necessary, the inte~lock relay adjustment
screws should be loosened and the trip coil repositioned
until the trip and latch armture gaps are proper. The
screws are then secured. Always check the switch adjust-
ments after a gap adjustment is made. Open contacts should
have a 1/32" gap. Closed must show .010" overtravel.
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