Star Tech Journal
Issue: 1994-March - Vol 16 Issue 1 - Page 7
March 1994
""'"TAR TECH JOURNAL
... Common Problems
3
E.O.S. mounted on the flipper
assembly is defective or out of
adjustment.
DON'S
VI DE 0
CORNER
PROBLEM
3
If the switch contacts are not
making, then the series circuit to
the 50 volt drive circuit enable
will be open -causing the flipper
not to work at all.
SOLUTION
between the game CPU and the
Display Board CPU at which
time the game microprocessor
goes into a wait status which
times out in approximately 15-30
seconds.
4
Install CPU/DISP Eprom revi-
sion 5.10
SOLUTION
Video Card
Games
8 Line
Machines
Don Powell
This can be easily determined by
using a jumper wire to short
across the switch and bypass it
completely until a replacement is
installed.
The switch contacts should be
adjusted so that when the sole-
noid is energized, the contacts
stay closed for almost the full
travel of the plunger. The con-
tacts should open 1/l(i" before
the plunger reaches maximum
travel.
;smifr!?»I
In game over mode, the display
blanks out for approximately 15-
30 seconds. If any coins are in-
serted during this period only the
first coin will give a credit -all
others will not. We have found
this condition only occurs in some
games.
PROBLEM 4
There is communication error
DoN's VtoEo REPAIR
------=-
I
UPDATE=J
Shelbyville, Tennessee
MECHANICAL
This kit for the T-Rex assembly
was installed to reduce torque on
the motors. This only needed to
be installed on games prior to se-
rial #87012, few of which were
sold in the domestic (USA) mar-
ket.
SOFTWARE
CPU 5.01 is the latest T-Rex re-
lated update. This slowed the left/
right motor down to reduce wear
and tear on the gears.
CHERRY
MASTER
VIDEO TRASH
EVERYWHERE
SYMPTOM
Video garbage on whole
screen.
CPU 5.10 is the latest revision
and was released strictly to elimi-
nate the display blanking out in
attract mode (see item #4).
Memory Ram 6116 at lo-
cation 16E may be bad.
NOTE
Sou;noN
Remove suspect IC. Re-
place and verify proper
operation.
If you have any questions, please
call our technical support line.
CAUSE
------------------7------------------
""'"TAR TECH JOURNAL
... Common Problems
3
E.O.S. mounted on the flipper
assembly is defective or out of
adjustment.
DON'S
VI DE 0
CORNER
PROBLEM
3
If the switch contacts are not
making, then the series circuit to
the 50 volt drive circuit enable
will be open -causing the flipper
not to work at all.
SOLUTION
between the game CPU and the
Display Board CPU at which
time the game microprocessor
goes into a wait status which
times out in approximately 15-30
seconds.
4
Install CPU/DISP Eprom revi-
sion 5.10
SOLUTION
Video Card
Games
8 Line
Machines
Don Powell
This can be easily determined by
using a jumper wire to short
across the switch and bypass it
completely until a replacement is
installed.
The switch contacts should be
adjusted so that when the sole-
noid is energized, the contacts
stay closed for almost the full
travel of the plunger. The con-
tacts should open 1/l(i" before
the plunger reaches maximum
travel.
;smifr!?»I
In game over mode, the display
blanks out for approximately 15-
30 seconds. If any coins are in-
serted during this period only the
first coin will give a credit -all
others will not. We have found
this condition only occurs in some
games.
PROBLEM 4
There is communication error
DoN's VtoEo REPAIR
------=-
I
UPDATE=J
Shelbyville, Tennessee
MECHANICAL
This kit for the T-Rex assembly
was installed to reduce torque on
the motors. This only needed to
be installed on games prior to se-
rial #87012, few of which were
sold in the domestic (USA) mar-
ket.
SOFTWARE
CPU 5.01 is the latest T-Rex re-
lated update. This slowed the left/
right motor down to reduce wear
and tear on the gears.
CHERRY
MASTER
VIDEO TRASH
EVERYWHERE
SYMPTOM
Video garbage on whole
screen.
CPU 5.10 is the latest revision
and was released strictly to elimi-
nate the display blanking out in
attract mode (see item #4).
Memory Ram 6116 at lo-
cation 16E may be bad.
NOTE
Sou;noN
Remove suspect IC. Re-
place and verify proper
operation.
If you have any questions, please
call our technical support line.
CAUSE
------------------7------------------
Future scanning projects are planned by the International Arcade Museum Library (IAML).