Basic HTML Version
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
[1>@Il.O©~
i1!@OO©[g
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 amently 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
"C.
sides of the circuitry.
•
The upper display then changes to show the 'side' of the cirroit 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 (Fa or F2C) or a faulty relay on the Aux
Power Driver Board; failure of the 12 or 24 voh 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.
•
CAR TEST
From the Switch Test, in AUTO-UP, press ADVANCE. Observe that the upper display shows the
message, CAR TEST, and that the lower display shows 09
(Car
Test identifier). This test confirms
that the Police
Car's
lamps operate and that the program has proper control of the car's operation.