Basic HTML Version
T Column Problems.
If display of two (ormore) switch numbers in a column
occurs (while only one switch is actuated), check for a short circuit to
ground or, a bad transistor (Q42-Q49) on the CPUBoard.
Use AUTO-UPto proceed to the next test.
2.
Switch Edges (07)
From the Switch LevelsTest, press ADVANCE.Observe that the Player 1 and 2
displays show the message, SWITCHEDGES: the Player 4 display shows 07 (Switch
Edges Test identifier). The light portion of the Player 4 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-liC switch testing program. When actuating a switch,
the operator should see the switch's name and number (in the Player I, 2, and 4
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
DR.
DUDE
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 Nor
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 CPUBoard, remove connectors IP8 and IPIO from the CPUBoard.
Begin the Switch Test. Use a jumper wire to simulate switch actuation. For
example, placing a jumper between IJlO-9 and IJ8-2 should (based on the Switch-
Matrix Table) should produce an indication of switch 09 being actuated. If only one
number is produced for every simulated switch actuation that occurred then the
CPU is good and the problem is elsewhere.
FLASHERTEST(08)
(From Lamp Test) Using AUTO-UP,press ADVANCE.Observe that the Player
1
and 2 displays show the message, FLASHERTEST, the Player 4 display shows 08
(Flasher Test identifier). Next, the Player 4 display shows a series of test steps
from 01 through 22, while the Player
1
and 2 displays show the flasher name. In
AUTOmode the test cycles through all known flashers one at a time, as fast as
possible. In MANUALmode, the test stops on the current flasher and slowly blinks
it. Pressing ADVANCEin MANUALmode will flash the next flasher. Note that the
solenoid number is after the "08" (same as solenoid test).
ENDING THE DIAGNOSTIC TESTS
To end the Diagnostic Tests, reach the C-Side Test use Auro-UP and press
1-39
Test/Diagnostic Procedures