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SECTION 5
BUILT IN DIAGNOSTICS
The built in diagnostics were designed for ease of opera-
tion and thoroughness.
The diagnostics have been
organized in such a way as to allow individual testing of
different areas in the machine. These areas include:
a) CPU Board Self - Test
b) Game Status change
c) Display digits test*
d) Lamps (test 01)
e) Solenoids (test 02)*
f) Switches (test 03)*
g) Game status display (test 04)*
* There are specific subtests in these tests. The different
ways to enter the diagnostics and normal game operation
are shown in Figure 5. There is also an auto cycle test
which will be discussed later.
DIAGNOSTIC SWITCHES
There are three switches which are used to control the
operation of the diagnostics:
I.
Diagnostic switch (lower pushbutton on CPU)
2. Auto/ Manual (inside coin door)
3. Advance switch (inside coin door)
Pressing the Diagnostic switch on the CPU Board initiates
the diagnostics and causes the CPU to perform three self
tests automatically:
1. ROM/PROM test
2. RAM test
3. CMOS RAM test
If any errors are detected,
the two LED's on the CPU
Board will light to indicate the specific failure. If all three
tests pass successfully, the two LED's will blink twice and
then go off. The diagnostics will then be in GAME
STATUS CHANGE.
CPU BOARD SELF TESTS
ROM
I
PROM TEST
The ROM / PROM test specifically checks the contents of
CPU Board IC 17, IC 20, IC 21, IC 22 to see if the in-
formation in the ROM's and the field PROMS is correct.
If the information is incorrect, the bottom LED will light
up and the top LED will be OFF on the CPU Board.
OFF
0
ROM / PROM failure
ON
.'tiII.-
,T-
RAM TEST
The RAM test specifically checks the ability of the RAM
lC's 13 and IC 16 to retain information correctly. If the
information is not retained correctly, the CPU Board top
LED will light up and the bottom LED will be OFF.
ON
*_
RAM failure
OFF
0
CMOS RAM TEST
The CMOS RAM test specifically checks the ability of
the ~MOS ~A~ IC 19 to retain information correctly. If
t~e information
IS
not retained correctly, both LED's will
light up and stay ON on the CPU Board.
ON
ON
-*-
CMOS RAM failure
-:.-
, t '
GAME STATUS CHANGE
Following the successful completion of the CPU Board
self tests, the two LED's blink twice and the diagnostic
program enters the game status change area. This is the
only time that changes can be entered as outlined in Sec-
tion 3 of this manual. Replay points, maximum credits,
match features, etc. can be changed ONLY during this
portion of the diagnostics. Any changes made to the data
will not be displayed until the game status display (test 04)
described later. After making all game status changes (if
any), press the ADVANCE pushbutton once to go to the
digits test.
NOTE:
This section of the diagnostic is the only section
where ALL player and master display digits are
turned OFF. No digits show on the displays un-
til the next section of the diagnostics is entered
by pressing the ADVANCE pushbutton on the
coin door.
DISPLAY DIGITS TEST
This test is controlled by the two switches mounted on
the coin door. If the AUTO/ MANUAL switch is in the
AUTO position,
the digits on the display will alternate
from 0 to 1 etc to 9 and back to 0, I, etc. This will con-
tinue until the ADVANCE pushbutton is' pressed.
If the AUTO/ MANUAL switch is in the MANUAL
position when entering the test, the digit displays will
show all zeros and will remain at zero until the AD-
VANCE is pressed. This will change all the displays to all
1'so Pressing ADVANCE again will change the display to
all 2's etc.