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TEST/DIAGNOSTIC PROCEDURES
(Continued)
SWITCH TESTS (Continued).
2. Switch Edges.
From the Switch Levels Test, press ADVANCE.
Observe that the upper display shows the
message, SWITCH EDGES; the lower display shows 07 (Switch Edges Test identifier). The right
portion of the lower 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 displays.
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 _mlTll'Wml!llt§!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 Switch Test, press ADVANCE. Observe that the upper display shows a message, C-SIDE
TEST, and that the lower display shows 08 (C-Side Test identifier). This test confirms that Solenoid
AlC Select Relay (Sol. 12) does alternate between the "A" and ''G'' sides of the circuitry.
The upper display then changes to show the 'side' of the circuit being tested, alternating the relay
between "SELECTED A-SIDE" and "SELECTED C-SIDE", while the lower display shows the state
of the C-Side Switch. While the "SELECTED C-SIDE" test is occurring, when the C-Side Switch
closes, the lower display shows "C-SIDE". When the "SELECTED A-SIDE" message appears, the
word "Err" appears in the lower display to indicate that there is no electrical connnection from the C-
side to the A-side. The message "Err" also appears whenever the C-Side Switch is not operating
properly. Causes of improper operation can be blown fuses (F8 or F2C) or a faulty relay on the Aux
Power Driver Board; failure of the 12 or 24 volt power circuits; a switch matrix failure; or faulty
connections between the circuit boards in the game's backbox (CPU Board, Aux Power Driver
Board, Backbox Interconnect Board). To halt the AlC Relay's operation, press MANUAL-DOWN
and press ADVANCE to activate the AlC Relay manually.
ENDING THE DIAGNOSTIC TESTS.
~
To end the Diagnostic Tests, reach the Car Test (09 in the Player 3 display), use AUTO-UP and
press ADVANCE.
The back box displays should show the \Wi}i)DI10wDI!Ilt§! game's Identification
Information (the Id 00 screen). 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.