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MAGNET and the LONG BEAM OPTO SWITCH
Even though the magnet does not need to rest against the Magnet Left side switch {#81} or the Magnet
Right side switch (#83)
it
Is recommended that the switches be adjusted so that 'the magnet does rest
against
each side. This ellmlnate"s any marginal switch adjustments.
The Ball On Magnet switch (#82) is a long beam
apia
and does not function like a short beam
opto.
With
the short beam optos, the transmitter Is always "on" and
the
receiver detects this constant "on" bearnand
produces a voltage drop. The long beam cpto transmits a modulated 40Khz (40,000 hertz) infrared beam,
and the receiver detects this signal (much like
an
AM radio, or a remote control for a TV). Simply checking
tor
voltages
on
the
receiver and transmitter af long beam aptos DOES NOT ensure proper operation.
The long beam apia, Ball On Magnet switch (#82), is a crflcal switch. Failure of this device can lead to false
"end of ball" conditions or multiple balls on the playfield (just like a bad trough switch). This also can
confuse
or mislead the error messages relating to 'the magnet It Is vital that this apia switch function
correctly.
If it cannot
be
made functional, then disable the magnet unit by using Feature game adiustrrern
A.2 42 until it can be fixed. Setting this adjustment to DISABLE causes the game to ignore the magnet
unit and start Mist Multiball via the Mist Mulliball shot.
The long beam opto can reflect under the ball when the ball is in the middle of the playfield. The antt-
retlecttcn
"L"
bracket in the
left
pocket eliminates most of this reflection and software eliminates the rest.
The long beam apta sender LED (white case) should be adjusted toward the Iront of the game. It
can
be
adjusted by loosening the three screws that hold the white case in place then sliding the device toward
the Iront of the game.
MAGNET and the SHORT BEAM OPTO SWITCHES
From the Magnet test, enter the sub-test Opla Check 1. The controlled lamps and flash lamps blink to see
If they lntertera with the apia beam when It Is covered and uncovered.
If there is any flasher or lamp
in1erference in this test, the most common problem Is that the sending LED and/or the receiving apia has
moved in its white/black plastic housing and are NOT pointing at each other. Both should be firmly
soldered to their PC boards, without any exposed wires between the device and the PC board. Other
problems can be that either plastic housing is not pornling at each other.
From the Magnet test, enter lhe SUb-test Opto Check 2. As In sub-test Opto Check 1, the controlled
lamps and
Ilashlamps blink to see
if
they interfere
with
the
opto bea,m
when
il is
cove-red
and uncovered. If
there is any flasher or lamp interference in this test, lhe most likely problem is that the ground of the
shielded cable is not grounded properly .
..