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6
Mechanical Systems
6.1
Pusher boxes
The pusher boxes are mounted on two Accuride slide bearings. An annual check to remove any
build up of dust, and a light coat of grease will ensure many years of reliable service.
Ensure that the coin scraper system is fully intact and working smoothly and freely, replace any
suspect parts subject to wear.
7
Fault Finding
7.1
Methodology
It is of mutual interest that your pusher is kept in excellent working condition, therefore when
required please order original replacement
parts from your distributor, MGA. If a fault occurs with
any electrical system
SWITCH THE MACHINE OFF.
Check that:-
a) There is a suitable mains supply.
b) All circuit breakers are set.
c) All plugs and sockets are correctly mated.
d) No wires are trapped, damaged or broken.
e) All wires are properly secured to their terminals and pins.
Wiring check.
A visual inspection will reveal the general condition of the wiring. A more thorough test using a
continuity tester will be needed to check apparently intact wires, however once a machine has been
playing successfully for some time wiring is not usually at fault.
Device testing.
Disconnect the machine from the mains supply then check the physical condition and operation of
the suspect device (remove from the machine if necessary). Bench test if possible using a suitable
power supply.
In general PCB's are not user serviceable. Should a problem develop indicating a board fault it is
recommended that the board be returned to your distributor for repair.
7.2
Systems Checking
When a fault occurs that affects two back-to-back sections of the machine, the power supply system
should be investigated first.
Check plugs are fully mated and wiring intact.
Check relevant circuit breakers are all set.
Refer to schematics and drawings to check power connections, voltages etc.
If the fault is not visual, or easily measurable it is often helpful to disconnect the outputs from the
PSU, check that the PSU is functioning then connect the loads one at a time.
It is easy to identify the faulty system, then use a similar technique within that system (such as
disconnecting all hoppers) to identify the faulty component.
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