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ADVANCE. The backbox displays should MANUAL-DOWN,and press ADVANCEto
reach Adjustment Item 70 (CLEARCOINS). Use AUTO-UP, and press ADVANCEto
go to the Attract 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 Start button. Set the AUTO-UP/MANUAL-DOWN switch to
AUTO-UP.
2.
Press ADVANCEto start the Auto Burn-in Mode. This mode repeatedly
sequences through the Music Test. the Display Test, the All Lamps portion of the
Lamp Test. and the Solenoid Test.
3.To halt the Auto Burn-in Mode. switch the game Off and then On. DR.
DUDE
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-ll C MEMORY CHIP TEST
A new feature is now included in the Memory Chip Test for System
11
C. 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 of 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, LED 2 ('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 reset the program by pressing the CPU Switch (SW2) on the edge of the
CPU Board.
SYSTEM-ll C SOUND CIRCUITRY TESTS
Tests of the System-II C Sound circuitry, including the Audio Board. are possible
only after successful completion of the System-lIC Memory Chip Test.
Audio Board Test
A brief check of the Audio Board (D-11581) circuitry occurs at game Turn-on: the
game reports the test results by brief sounds. as follows: No sound = Audio Board
Is not operating. or a failure is affecting the sound circuitry (broken cable: dead
amplifier:
etc.):
1 sound = system OK: 2 sounds = RAMproblem: 3 sounds = U4
problem: 4 sounds = U19 problem: 5 sounds=U20.
Test/Diagnostic Procedures
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