Star Tech Journal
Issue: 1985-June - Vol 7 Issue 1 - Page 1
Sf'AR1f IECHJOURNAL
THE TECHNICAL MONTHLY FOR THE AMUSEMENTS INDUSTRY
P.O. BOX 1065, MERCHANTVILLE, NEW JERSEY 08109
JUNE
BULLETINS
****
BALLY MIDWAY
111111111111111111111111
Game: DEJIIOLITION DERBY
llllllllllllllllllffffff
SubJect: Rom change
(location 1C on CP'J board).
An error has beer1 detected
in the galllE!'s coins/credit
switch settings. When tryir1s
to set the game for either 2
coins/1 play or 1 coin/2
plays, no Matter what the dip
switches are set for, the
game will always give 1 coin
/1 credit. Any game with
Serial Numbers 101 to 350 rnay
exhibit this fault.
If it is necessary to
utilize these settings (2
coins/1 play or! coin/2
plays) a corrected Eprom is
available from the factory
(contact your distributo>' for
availability). The new memory
chip will be installed ir1
position 1C on the CPU board.
1111111111111111111111111
6a11e: FIREBALL CLASSIC
IIIIIIIIIIIIIIIIIIIIIHH
(ga11e serial numbers 101
thru 743).
Problem: The game-over and
high-score feature lights or,
the back box insert do not
light during the attract mode
or during game play. However,
they will flash on and off
during lamp self test.
Reason: Game-over lamp
socket wire, 97(Gy/0rl or
47(Grn/Orl is reversed with
the high-score lamp socket
wire, 95(Gy/Whtl. The insert
24 pin raale 111olex connector
has two wires inserted ir,tc,
the 11rong pcsitior,; pir, 12,
95(Gy/Whtl and pin 13 1
97(6y/Or) or 47(Grri/Orl
Solution: Correct lamp
socket wiring as follows:
6a11e-over lamp socket wire
should be 95(Gy/Whtl.
High-score lamp socket wire
should be 97(Gy/Orl or
47(6rn/Orl.
Correct 24 pin male Molex
connector wire/pir, positions
as fol1011s:
Move 95(6y/Wht) from pin 12
STA~TECH JOOINL, June
1985, Volume 7, Number 1.
Copyright (cl 1985 by Star
Tech Journal, Inc. All rights
1985
VOLUME
to pin 14. 111ove 97(Gy/Orl or
47(6rn/Or) from pin 13 to pir,
15.
7.,
NUMBER
energize and never release.
Solution: Replace 74S04
with 74LS04 (part #26-00007).
1
(All Control Board betlleer,
pins 7 and 11 of TC1.
****
IIIIIIIIIIIIIIIIIIIIHH
111111111111111111111111
Game: FIREBALL CLASSIC
Game: ATTILA THE HUN,
ARACHNID
IIIIIIIIIIIIIIIHHfffH
Salle: ENGLISH MARK DARTS
Problem: The 17 inch long
bar that makes the left rail
of the ball shooter lane may
be shorted to ground, If the
ball should rub against this
rail while rolling over the
right special lane switch, it
will short the special lane
switch to ground and cause
the ■ icroprocessor to Jump
out of program. This can
cause various problems: The
ball can roll in the outhole
and die there; the game car,
go reset and then power up
again; or any solenoid may
energize and burn.
Solution: To test for this
shorted rail condition, the
playfield must be down and
locked. Use an ohm meter to
check for continuity from the
rail to the coin door or to
the center pin of the power
plug. If the rail is shorted,
the short is because the edge
of the rail closer to the
bottom arch is touching the
metalwork of the ball returr1
channel. Simply use a
screwdriver to pry the two
parts apart slightly and the
short will be cured.
1111111111111111 ...... fH
IIIIIIIIIIIIIIIIIIIIIHf
Symptom: Continuous extra
ball condition
Fix: To eliminate
continuous ball condition
Switch 29 on the l'IPU Cor,trol
Board ■ust be ' ON'
(A082-91624-A000).
ATARI
****
111111111111111111111111
Same: MARBLE MADNESS.
lllllllllllllll~fff
Problem: Game displays
•Software E>
PCB to see if there is a 2.2k
oh11 pull-up resistor near 13F
pin 2, to +5 volts.
llllllllllllllllllfffffl
6alle: MARBLE MADNESS.
111111111111111111111111
Problem: Game resets at low
line voltage <100vacl
Solution: Replace diode CR4
with a 754A - Atari part
number 131002-001.
111111111111111111111111
Sue: MARBLE IIIADNESS.
IIIIIIIIIIIIIIIIIIIIIHf
Proble■ : HUJ11111ing noise from
speakers.
Solution: Check Regulator
Audio III PCB for Rev. A 1.:,r
Rev. B. If Rev. A, resistors
R16 and R17 should not be
present. Also a .tuf
capacitor should be installed
across diode CR3.
AGENTS 777
1111111111111111111111111
Proble■: Microprocessor
chip problems.
Solution: If a particular
board seems to have problems
with the Microprocessor chip
itself failing, install a
1N914 (or 1N4148l diode from
the PROG pin (pin 25 on Mpu
8749) to +5vdc (cathode end
to +5).
This can 110St easily be
aCC0111plished on the main PC
board between Ic4 and Ic5.
The cathode (banded endl can
be soldered to the +5vdc bus
at the 74LS138 noise filter
capacitor. The anode end then
can be inserted into the
plated through hole Just
oppcsite the cap (two traces
over).
TECH
CALL
111111111111111111111111
Salle: Bally Midway SPY
HUNTER, TAPPER
IIIIIIIIIIIIIIIIIIIIHH
Problem: The oscillator
I. C. on the MPU board may nc,t
be the correct type. This
I.C. is closest to the
crystal and labeled #3 ar,d
should be 74LS04. If a 74S04
should be in this position
the oscillator does not
always start on power up, ~f
this happens a solenoid raight
Problem: Bookkeeping
failures.
Solution: To prevent
intermittent bookkeepir1g Ram
(15) failures, a 3k, 5%, 1/4w
resistor (X0-23) has been
added to the circuit.
This resistor is part of
the Reset Board Interconriect
Cable Assembly MA-157, ar,d is
positioned on A24P2 between
pins 7 and 11.
The resistor can also be
installed on the
non-eo11ponent side of the
Tech: Chris Love, Bally
Banner, Philadelphia, PA.
Sy ■pto■: Game is
"locked-up•, white screen
with random graphics, will
not coin or start.
Probable cause:
Microprocessor, Z80B, is
eKperiencing a high rate of
failure as well as the Clock
Timer chip
exchanging with a known good
IC. The Z80B must be replaced
Mith another ·a· {speed
considerations), a Z80 or
Z88A wi 11 not work. Check the
+5vdc supply for a reading or1
the PCB of no higher than
5.0vdc with a good digital
VOM. This voltage reading is
critical and its
■ isadJust111ent is the primary
cause of failure for these
reserved. Address inquires
to: POB 1065, Merchantville,
NJ 08109. Subscription rates:
USA $56, Canada $63, Other
countries $98
published monthly
to subscribers on
of the month via US 1st Class
Mail in North Arnerica, via
Air Mail elsewhere. James
Calore: Publisher/Editor.
****
GAME PLAN
111111111111111111111111
Game: ATTILA THE HUN,
AGENTS 777
lllllllllllllllfHfffHf
****
GOTTLIEB/MYLSTAR
111111111111111111111111
Sue: All System 80 and
System 80A Games
1111111111111111111111H
funds).
is
and mailed
the first
THE TECHNICAL MONTHLY FOR THE AMUSEMENTS INDUSTRY
P.O. BOX 1065, MERCHANTVILLE, NEW JERSEY 08109
JUNE
BULLETINS
****
BALLY MIDWAY
111111111111111111111111
Game: DEJIIOLITION DERBY
llllllllllllllllllffffff
SubJect: Rom change
(location 1C on CP'J board).
An error has beer1 detected
in the galllE!'s coins/credit
switch settings. When tryir1s
to set the game for either 2
coins/1 play or 1 coin/2
plays, no Matter what the dip
switches are set for, the
game will always give 1 coin
/1 credit. Any game with
Serial Numbers 101 to 350 rnay
exhibit this fault.
If it is necessary to
utilize these settings (2
coins/1 play or! coin/2
plays) a corrected Eprom is
available from the factory
(contact your distributo>' for
availability). The new memory
chip will be installed ir1
position 1C on the CPU board.
1111111111111111111111111
6a11e: FIREBALL CLASSIC
IIIIIIIIIIIIIIIIIIIIIHH
(ga11e serial numbers 101
thru 743).
Problem: The game-over and
high-score feature lights or,
the back box insert do not
light during the attract mode
or during game play. However,
they will flash on and off
during lamp self test.
Reason: Game-over lamp
socket wire, 97(Gy/0rl or
47(Grn/Orl is reversed with
the high-score lamp socket
wire, 95(Gy/Whtl. The insert
24 pin raale 111olex connector
has two wires inserted ir,tc,
the 11rong pcsitior,; pir, 12,
95(Gy/Whtl and pin 13 1
97(6y/Or) or 47(Grri/Orl
Solution: Correct lamp
socket wiring as follows:
6a11e-over lamp socket wire
should be 95(Gy/Whtl.
High-score lamp socket wire
should be 97(Gy/Orl or
47(6rn/Orl.
Correct 24 pin male Molex
connector wire/pir, positions
as fol1011s:
Move 95(6y/Wht) from pin 12
STA~TECH JOOINL, June
1985, Volume 7, Number 1.
Copyright (cl 1985 by Star
Tech Journal, Inc. All rights
1985
VOLUME
to pin 14. 111ove 97(Gy/Orl or
47(6rn/Or) from pin 13 to pir,
15.
7.,
NUMBER
energize and never release.
Solution: Replace 74S04
with 74LS04 (part #26-00007).
1
(All Control Board betlleer,
pins 7 and 11 of TC1.
****
IIIIIIIIIIIIIIIIIIIIHH
111111111111111111111111
Game: FIREBALL CLASSIC
Game: ATTILA THE HUN,
ARACHNID
IIIIIIIIIIIIIIIHHfffH
Salle: ENGLISH MARK DARTS
Problem: The 17 inch long
bar that makes the left rail
of the ball shooter lane may
be shorted to ground, If the
ball should rub against this
rail while rolling over the
right special lane switch, it
will short the special lane
switch to ground and cause
the ■ icroprocessor to Jump
out of program. This can
cause various problems: The
ball can roll in the outhole
and die there; the game car,
go reset and then power up
again; or any solenoid may
energize and burn.
Solution: To test for this
shorted rail condition, the
playfield must be down and
locked. Use an ohm meter to
check for continuity from the
rail to the coin door or to
the center pin of the power
plug. If the rail is shorted,
the short is because the edge
of the rail closer to the
bottom arch is touching the
metalwork of the ball returr1
channel. Simply use a
screwdriver to pry the two
parts apart slightly and the
short will be cured.
1111111111111111 ...... fH
IIIIIIIIIIIIIIIIIIIIIHf
Symptom: Continuous extra
ball condition
Fix: To eliminate
continuous ball condition
Switch 29 on the l'IPU Cor,trol
Board ■ust be ' ON'
(A082-91624-A000).
ATARI
****
111111111111111111111111
Same: MARBLE MADNESS.
lllllllllllllll~fff
Problem: Game displays
•Software E>
PCB to see if there is a 2.2k
oh11 pull-up resistor near 13F
pin 2, to +5 volts.
llllllllllllllllllfffffl
6alle: MARBLE MADNESS.
111111111111111111111111
Problem: Game resets at low
line voltage <100vacl
Solution: Replace diode CR4
with a 754A - Atari part
number 131002-001.
111111111111111111111111
Sue: MARBLE IIIADNESS.
IIIIIIIIIIIIIIIIIIIIIHf
Proble■ : HUJ11111ing noise from
speakers.
Solution: Check Regulator
Audio III PCB for Rev. A 1.:,r
Rev. B. If Rev. A, resistors
R16 and R17 should not be
present. Also a .tuf
capacitor should be installed
across diode CR3.
AGENTS 777
1111111111111111111111111
Proble■: Microprocessor
chip problems.
Solution: If a particular
board seems to have problems
with the Microprocessor chip
itself failing, install a
1N914 (or 1N4148l diode from
the PROG pin (pin 25 on Mpu
8749) to +5vdc (cathode end
to +5).
This can 110St easily be
aCC0111plished on the main PC
board between Ic4 and Ic5.
The cathode (banded endl can
be soldered to the +5vdc bus
at the 74LS138 noise filter
capacitor. The anode end then
can be inserted into the
plated through hole Just
oppcsite the cap (two traces
over).
TECH
CALL
111111111111111111111111
Salle: Bally Midway SPY
HUNTER, TAPPER
IIIIIIIIIIIIIIIIIIIIHH
Problem: The oscillator
I. C. on the MPU board may nc,t
be the correct type. This
I.C. is closest to the
crystal and labeled #3 ar,d
should be 74LS04. If a 74S04
should be in this position
the oscillator does not
always start on power up, ~f
this happens a solenoid raight
Problem: Bookkeeping
failures.
Solution: To prevent
intermittent bookkeepir1g Ram
(15) failures, a 3k, 5%, 1/4w
resistor (X0-23) has been
added to the circuit.
This resistor is part of
the Reset Board Interconriect
Cable Assembly MA-157, ar,d is
positioned on A24P2 between
pins 7 and 11.
The resistor can also be
installed on the
non-eo11ponent side of the
Tech: Chris Love, Bally
Banner, Philadelphia, PA.
Sy ■pto■: Game is
"locked-up•, white screen
with random graphics, will
not coin or start.
Probable cause:
Microprocessor, Z80B, is
eKperiencing a high rate of
failure as well as the Clock
Timer chip
exchanging with a known good
IC. The Z80B must be replaced
Mith another ·a· {speed
considerations), a Z80 or
Z88A wi 11 not work. Check the
+5vdc supply for a reading or1
the PCB of no higher than
5.0vdc with a good digital
VOM. This voltage reading is
critical and its
■ isadJust111ent is the primary
cause of failure for these
reserved. Address inquires
to: POB 1065, Merchantville,
NJ 08109. Subscription rates:
USA $56, Canada $63, Other
countries $98
published monthly
to subscribers on
of the month via US 1st Class
Mail in North Arnerica, via
Air Mail elsewhere. James
Calore: Publisher/Editor.
****
GAME PLAN
111111111111111111111111
Game: ATTILA THE HUN,
AGENTS 777
lllllllllllllllfHfffHf
****
GOTTLIEB/MYLSTAR
111111111111111111111111
Sue: All System 80 and
System 80A Games
1111111111111111111111H
funds).
is
and mailed
the first
Future scanning projects are planned by the International Arcade Museum Library (IAML).