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TEST/DIAGNOSTIC PROCEDURES
(Continued)
SWITCH TESTS (Continued).
2. Switch Edges.
From the Switch Levels Test, press ADVANCE. Observe that the Player 1 and 2 displays show
the message, SWITCH EDGES; the Player 3 display shows 07 (Switch Edges Test identifier).
The right portion of the Player 3 display is blank, indicating that no switch is actuated.
This test permits the operator to test whether actuating a switch provides the proper signal to
the System-11 B switch testing program. When actuating a switch, the operator should see the
switch's name and number (in the Player 1, 2, and 3 displays, respectively). If no indication
appears at the time the switch is actuated, the operator then knows that there is a malfunction
associated with that switch.
Using this technique, the operator can test each switch appearing in the
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switch problem reporting displays (either at game Turn-On or at the beginning of the Diagnostic
Tests) to determine whether the switch can be actuated. If the switch's name and number are
displayed while the operator checks its operation, the operator then knows that the reported
problem with that switch is NOT currently caused by a switch malfunction. The operator can
then seek other causes for the reported problem, being almost certain now that the switch did
not fail.
This test is also useful when the operator is adjusting the sensitivity of
a
particular
switch's actuation mechanism.
Among the possibilities is the fact that the players have not actuated that switch because of
some other problem; the operator should try to analyze what could cause the switch to be
missed during game play, and remedy that problem cause. With these new tests, switch
problems are, therefore, more easily isolated.
3. Playfield or CPU Board?
To determine whether a switch problem is in the playfield or the CPU
Board, remove connectors 1P8 and 1P10 from the CPU Board. Begin the Switch Test. Use a
jumper wire to simulate switch actuation. For example, placing a jumper between 1J10-9 and
1J8-2 should (based on the Switch-Matrix Table) should produce an indication of switch 09
being actuated.
C-SIDE TEST
From the Wheel Test, press ADVANCE. Observe that the Player 1 and 2 displays show the
message, C-SIDE TEST, and that the Player 3 displays shows 09 (C-Side Test identifier).
The Player 1 and 2 displays then change to show the 'side' of the circuit being tested, alternating
between "SELECTED A-SIDE" and "SELECTED C-SIDE", while the Player 3 display shows 09
and the side being tested. The message "Err" appears whenever the side being tested is not
receiving power via the relay and fuse of the Aux Power Driver Board and the resistor and opto
transistor of the Backbox Interconnect Board. The "Err" message of this test indicates a
component failure (most likely, a blown fuse) in the pulsing circuitry for the coils and flashers.
ENDING THE DIAGNOSTIC TESTS.
To end the Diagnostic Tests, reach the C-Side Test (09 in the Player 3 display), use AUTO-UP
and press ADVANCE. The backbox displays should show the
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game's
Identification Information. Use MANUAL-DOWN, and press ADVANCE to reach Adjustment Item
70 (INSTALL FACTORY). Use AUTO-UP, and press ADVANCE to go to the Attract Mode.
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