Williams Electronics WHIRLWIND - Auto Burn-in Mode; System-11 B Memory Chip Test; CPU LED Indicator Codes Table

TEST/DIAGNOSTIC
PROCEDURES
(Continued)
AUTO
BURN-IN MODE.
The
Auto__Bu_m_-_in_Mgd_e 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 :
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
Music
Test,
the
Display Test, the Sound Test,
the
All
Lamps
portion of the
Lamp Test,
and the
Solenoid Test.
A
'
3.
To
halt
the
AttLat;t_Mt2t1e, (If
a
switch
problem
is now reported
by the displays, perform
the Switch Tests
again to
determine the
nature
of
the problem;
then,
perfonn necessary repairs.)
SYSTEM-11B
MEMORY
CHIP
TEST.
A new feature
is
now included in
the Memory
Chip
Test for
System
118.
During power‘-up,
the CPU
performs a
self-testing
routine.
When
all
tests are
satisfactory,
the game
proceeds to the
Atttact
Mt2_d_e_, 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
any
part of the self-test
routine
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-test
routine
by
pressing
the
CPU
Diagnostic
Switch (SW 2) on the
edge of the
CPU Board.
CPU
LED Indicator
Codes Table
Diagnostic
LED
B11 k
/
Flaghzs Display
Message
Explanation
1
U25
RAM FAILURE U25 RAM could
not
be used properly (NO other tests are
performed;
the
game is locked here, until the game is
turned off).
2 MEM. PROT.
FAILURE This message means that (A) the Coin Door may
be shut; (B)
the Mem-
ory
Protect
Switch
may
be stuck in the ON
position;
(C) the memory
protect logic is protecting the memory; or (D) a
U25 RAM
failure is
occurring. (See Note 1)
3
U51 PIA FAILURE U51 has a malfunction. (See Note 2)
4 U38 PIA FAILURE U38
has a
malfunction. (See Note 2)
5
U41 PIA FAILURE U41 has a malfunction. (See Note
2)
6 U42
PIA FAILURE U42 has a
malfunction. (See Note 2)
7 U54 PIA FAILURE U54 has a malfunction.
(See Note 2)
8
U10
PIA FAILURE U10
has a malfunction.
(See Note 2)
9 IRO
FAILURE
IRQ
has
a malfunction.
It may be missing
or too fast
or too slow.
1 0 U27 ROM FAILURE U27‘s
internal checksums
do not match.
It may
be a ROM
failure,
or
its
associated
connections
and connectingdevices
are causing
it to ap-
pear to have a problem.
(The following
U26
test is skipped.)
1 1 U26 ROM FAILURE
U26's internal checksums
do
not match.
Notes: 1. This test assuxnes that
the Coin Door is
OPEN; it
is initiated
ONLY
by
pressing
the CPU
Diagnostic Switch
(SW2).
2. Alternatively,
its associated
connections
or connecting
devices
are
causing
the
IC
to ap-
pear
to have
problems.
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