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TEST/DIAGNOSTIC PROCEDURES
(Continued)
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). This test
confirms that the Solenoid
AIC
Select Relay (Sol. 12) is actually in the 'C' position (ready to power
flashlamp circuits).
The Player 1 and 2 displays then change to show the 'side' of the circuit being tested, alternating
the
NC
Relay between "SELECTED A-SIDE" and "SELECTED C-SIDE", while the Player 4 display
shows the state of the C-Side Switch. When the switch is closed, the Player 4 display shows
"C-SIDE".
The message "Err" appears whenever the C-Side Switch is not operating properly.
Causes of
improper operation can be blown n.ses (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
NC
Relay's operation, press MANUAL-DOWN and press ADVANCE to activate
the
A/C
Relay manually.
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 JOKERZ 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 Anract Mode.
AUTO BURN-IN MODE.
The Auto Burn-in Mode permits the operator to check intermittent (or nonrecurring) problems
associated with most portions of the game's circuitry. Repeatedly cycling through a group of tests
can sometimes bring a problem, which occurs only randomly or occasionally, to exhibit itself more
frequently, thereby aiding in the isolation of the problem. To activate the Auto Burn-in Mode:
1. While in the Game Adjustments, reach Ad 67 and change the Factory Setting of NO to YES, via
the Credit button. Set the AUTO-UP/MANUAL-DOWN switch to AUTO-UP.
2. Press ADVANCE to start the Auto Burn-in Mode. This mode repeatedly sequences through
the Music Test, the Display Test, the Sound Test. the All Lamps portion of the L.amp Test, and
the Solenoid Test.
3. To halt the Auto Burn-in Mode, switch the game Off and then On. JOKERZ now starts in the
Attract Mode.
(If a switch problem is now reported by the displays, perform the Switch Tests
again to determine the nature of the problem; then, perform necessary repairs.)
SYSTEM-11 B MEMORY CHIP TEST.
A new feature is now included in the Memory Chip Test for System 11B. During power-up, the
CPU performs a self-testing routine. When all tests are satisfactory, the game proceeds to the
Attract Mode, allowing players to use the game. Whenever a portion of the testing does not
produce satisfactory results, the game displays a message, before proceeding to the next portion
at the testing. ONLY after all tests are satisfactory does the game allow play to begin.
In addition to the displayed message, when a test fails. LED2 (,DIAGNOSTIC') mounted on the CPU
Board can be observed to determine the probable cause of the problem.
This LED blinks, or
flashes, a certain number of times to identify the probable cause. as described in the CPU LED
Indicator
Codes Table.
The operator can also start the self-testing routine by pressing the
CPU Diagnostic Switch (SW 2) on the edge of the CPU Board.
JOKERZ
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