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TEST/DIAGNOSTIC PROCEDURES
WILLIAMS ELECTRONICS GAMES provides a series of diagnostic tests to aid the operator in determining game
condition (that is, whether the game's features and highlights are operating satisfactorily). These tests activate
virtually all the electronic and electromechanical devices comprising the game, so that the operator can readily
locate a malfunctioning device or simply verify that all devices are working properly. In order, these tests deal
with the music, the displays, the game sounds, the lamps, the solenoids. and the switches.
In addition to the diagnostic testing, a feature called the Auto Burn-in Mode is available. Activating this mode
enables the operator to observe the game while all of the diagnostic tests,
except the switch test,
occur. This
can be very helpful in locating intermittent problems.
Activating either the entire test series or one of the individual tests requires use of the Game Adjustmenll
Diagnostic switches. Open the coin door for access to these switches. To proceed to the Diagnostic Tests. the
operator must simply switch the game On, set the AUTO-UP/MANUAL-DOWN switch to MANUAL-DOWN, and
press the ADVANCE button.
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GRAND LIZARD's System
11
game program
has a new capability to aid the operator and service per-
sonne!: When the operator is beginning the TesUDiagnostic Procedures (and also at game Turn-On),
a display now signals when a switch has NOT been actuated during ball play for a lengthy period of
time (60 balls, or 20 games). However, for the Switch Problem Reporting activity at the beginning of
the Test/Diagnostic Procedures, the display of problem switches is
not
limited to just three
switches; it now includes
ALL
switches exhibiting problems. Refer to the text on Switch Tests for
additional information. To proceed with the Test/Diagnostic Procedures, use AUTO-UP, and press
ADVANCE.
MUSIC TEST.
1. In the Music Test, observe that the player 1 and 2 displays show the message, MUSIC TEST. Adjust the
volume control for proper sound level for the game location.
2. Use the AUTO-UP position.
DISPLA Y TEST.
1. To initiate the Display Test, press ADVANCE. Observe that player 1 and 2 displays briefly show the
message, DISPLAY TEST, and that the Credits display shows 00 (the Display Test identifier).
2. Use AUTO-UP. Observe that all displays begin a display cycle of all Osthrough all 9s, one digit at a time.
Verify that the proper comma segments light during display of the odd-numbered digits. Next, a special
"all segments" character 'walks' from left to right across each display (player 1, 2, 3, 4, BALL IN
PLAY/MATCH, Credits).
3. To halt the display cycle, use MANUAL-DOWN. Then, press ADVANCE to step through the sequential digit
display, digit by digit, and the subsequent "all segments· characters display test. Use AUTO-UP to
resume cycling, and to proceed to the next test.
SOUND TEST.
1. (From Display Test) To initiate the Sound Test, press ADVANCE. Observe that the player 1 and 2 displays
show the message, SOUND TEST, and that the Credit display shows 01 (the Sound Test identifier). The
BALL IN PLAYIMATCH display shows a series of test steps from 00 through 07. Verify that a different
sound is heard each time the number in the BALL IN PLAY/MATCH display changes.
2. To repeatedly pulse a single sound, use MANUAL-DOWN. Verify that one particular sound repeats. Press
ADVANCE to step to the next sound, which repeats until ADVANCE is pressed again. Use AUTO-UP to
resume cycling the sounds, and to proceed to the next test
LAMP TESTS.
1. All Lamps.
(From Sound Test) To initiate the first Lamps Test, press ADVANCE. Observe that the player 1 and 2
displays show the message, ALL LAMPS, and that the Credit display shows 02 (All Lamps Test identifier)
and that all feature lamps (playfield and backbox) blink on and off. (Note, however, that the General lllurnl-
nation lamps remain lighted steadily.) To locate the wiring associated with a particular lamp. refer to the
Lamp-Matrix Table. CPU Board connections at jacks 1J6 (columns) and 1J7 (rows) are also fisted in
the table.
GRAND LIZARD 23