Arcade Game Manual: Midway Service Bulletin

CABLE - MiDCO
TBLBX NO. 72-1596

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

TABLE OF CONTENTS

SfLF TESTING RAMS & ROMS
HAMS & PROM CHART
GAME NUMBERS
DIFFERENT POWER SUPPLIES
ANTI-PENNY KIT
ANTI-STRING KIT
WIZARD OF WOR FEATURES

RALLY X RAM CODE

GORF CARD RACK SYSTEM

GORF PROGRAM CHANGE

SPECIAL ALLEN WRENCH

ANTI-STATIC CLEANER

NEW BACK DOOR KEY

CREDIT BYPASS JACK

COLOR MONITOR BRIGHTNESS ADJUSTMENT

PAC-MAN CUSTOM CHIP

PAC-MAN DIP SWITCHES

PAC-MAN ROM & RAM TEST CODE

CARD RACK SYSTEM TEST CARDS

SPACE ENCOUNTER STROBE UNIT FIX

SPACE ENCOUNTER TRIGGER KIT

SPACE ENCOUNTER GAME BOARDS

SPACE ENCOUNTERS 25K POTS

SPACE ENCOUNTERS POWER SUPPLY

GALAXIAN COIN SWITCH CAPACITOR

GALAXIAN AND PAC-MAN STATIC KIT

GALAXIAN RAM & ROM TEST

GALAXIAN PROGRAM #1& #2

GALAXIAN PROGRAM #3

GALAXIAN ALTERNATE P.C. BOARD

GALAXIAN BAD RAM #2

VIDEO GAME MONITORS

ELECTROHOME COLOR ADJUSTMENT

Page No.

1

2

3-6

7

8-9

10

11

12-13

14

15-17

18

19

20

21

22

23

24

25

26

27-28

29—30

31
32-33
34
35
36-37
38
39
40
41
42
43

GALAXIAN INTERFACE WIRE SEQUENCE

WELLS GARDNER INTERFACE WIRE SEQUENCE

ELECTROHOME INTERFACE WIRE SEQUENCE

GAUXIAN WELLS GARDNER 19K 4500

GALAXIAN 25 INCH MONITOR

GALAXIAN BLACK & WHITE MODIFICATION

EXTRA BASES BALLSENSOR MODIFICATION

EXTRA BASES RAM CARDS

DELUXE SPACE INVADERS NAME FEATURES

SPACE INVADERS DELUXE CUSTOM I.C.

SPACE INVADERS DELUXE PROM & ROMS

PROM & ROM IDENTIFICATION

SPACE INVADERS RANDOM GARBAGE

SPACE INVADERS LINES IN VIDEO

SPACE INVADERS DIP SWITCH SETTING

SPACE INVADERS 25S10 & 74151 CHIPS

SUBMARINE ZERO SWITCHES

18 WHEELER PREMATURE GAME OVER

18 WHEELER BACK DOOR VENTING

ELECTROHOME GO-2 COLOR MONITOR

CUSTOM CHIPS

SEA WOLF II ELECTROHOME MONITOR

ROTATION Vm POWER RESET

ROTATION VIII "F"&"G" BOARD

RAM & ROM SELF TEST BOWLING ALLEY

STRAPPING 2716 & 9316

PROM STRAPPING SINGLE SUPPLY

POWER SUPPLY CHECK LIST

MOTHER BOARD RESET FIX

MONITOR YOKE WIRING

MONITOR MANUFACTURERS

GLOSSARY OF TERMS

Page No.
46-50

51

52

53
54-55

56

57

58

61

62

63-64

65

67

70-71

72

73

74
75-76

77
78-79

80

81

82

83
84—85

87

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/DCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

Roms and Rams Self Testing

GAME

SELF TEST SWITCH

Gun Fight
Sea Wolf

Tornado Baseball

Maze

280ZZap

Check Mate

Boot Hill

Double Play

Road Runner

Guided Missile

Laguna Racer

M-4

Clowns

Extra Inning

Sea Wolf II

Space Walk

Dog Patch

Shuffleboard

Bowling Alley

18 Wheeler

Phantom II

Super Speed Race

Space Invaders II

Galaxian, Pac-Man & Rally X

Space Encounters

Space Zap, Gorf & Wizard Of WOR

None

Roms only

Switches 6, 7, & 8 to off position

Switch #6 off
Switch #4 off
Switch #3 off & #4 on
Switch #8 off
Switch ifS off
Switch #7 on
Switch #7 & #8 off
Switch #8 on
Switch #7 off & #8 on
Switch #5 on
Switch #8 off
Switch #7 on
Switch #8 off
Switch #8 off
Switch #6 on
Switch #8 on
Switch #8 on
Switch #8 on
Switch #6 off
Switch #8 off
Switch #8 off
Slide Switch on
Switch #5 off & #6 on
Slide Switch on

NOTE: Activate coin door tilt switch to start self test
invaders & Blue Shark has no Ram and Rom Test.

(2X)

(2X)
(2X)

(2X)

(2X)

(2X)

(Z80)

(2XL)

(Z80)

(Z80)

(2XL)

(2XL)

ROM
GAME

GUN FIGHT

SEA WOLF

TORNADO BASEBALL

MAZE

280 ZZZAP

CHECKMATE

BOOT HILL

DOUBLE PLAY

ROADRUNNER

GUIDED MISSILE

LACUNA RACER

M-4

CLOWNS

EXTRA INNING

SEA WOLF II

SPACE WALK

DOG PATCH

SHUFFLEBOARD

ROTATION VIII

SPACE INVADER

BOWLING ALLEY

BLUE SHARK

18 WHEELER

PHANTOM II

SUPER SPEED RACE

SUBMARINE

SPACE INVADERS DELUXE

SPACE INVADERS il

& PROM CHART
4K

(NAMCO) GALAXIAN

8
8

NO

8

NO

8

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO
NO

GAME 8K

EXTRA BASES NO

SPACE ENCOUNTERS NO

SPACE ZAP NO

CORF NO

PAC-MAN NO

RALLY X NO

Wizard Of WOR NO

(3604)
(3604)

(3604)

(3604)

8K

4

4

NO

4

6

4

NO

8

8

8

7

8

6

NO

NO

8

NO

NO

NO

NO

NO

NO

NO

NO

3

3

NO

NO
NO

(1976)
(27581)

(2708)
(2708)
(2708)

(2708)
(2708)
(2708)
(2708)
(2708)
(2708)

(2708)

16K

8

8

8

16

NO

NO

NO

16K

NO

2

3

2

3

2

4

4

4

4

4

4

NO

5

4

NO

4

4

4

4

5

3

4

4 + 1

2

2

5

6

7

(9316)
(9216)
(9316)
(9316)
(9216)
(9316)
(9316)
(9316)
(9316)
(9316)
(9316)

(2716)
(2716)
(9316)

(2716)

(2716)

(2716)
(2716)
(9316)

(2716)
(2716)

(2716)
(2716)

(2716)

(2716)
(9316)

(2716)

(2716)
(9316)

32K

4

NO

4

8

6

5

7

CABLE - MIDCO
TELEX NO. 77-1596

/%/\ PHONE: AREA COPE 312 451-1360

MIDWAY MFG. CO. ch/cago phone.. 992-2250

A BALLY COMPANY

10750 W. G«AND AVENUE • FRANKUN PARK, ILL. 60)3)

SERVICE BULLETIN

GAME (UPRIGHT)

DATE

GAME NUMBER

GUN FIGHT

1975

597

SEAWOLF

1976

596

TOP GUN

1976

603

TORNADO BASEBALL

1976

605

280 ZAP

1976

610

MAZE

1976

611

BOOT HILL

1977

612

CHECKMATE

1977

615

ROADRUNNER
DESERT GUN

1977

618

DOUBLE PLAY

1977

619

LACUNA RACER

1977

622

GUIDED MISSILE

1977

623

M-4

1977

626

SEAWOLF II

1978

625

CLOWNS

1978

630

SPACE WALK

1978

640

EXTRA INNING

1978

642

SHUFFLEBOARD

1978

643

DOG PATCH

1978

644

BOWLING ALLEY

1979

SPACE INVADERS

1979

PHANTOM II

1979

18 WHEELER

1979

SUBMARINE

1979

SUPER SPEED RACE

1979

EXTRA BASES

1980

SPACE ENCOUNTERS

1980

SPACE INVADERS II

1980

SPACE INVADERS DELUXE

1980

BLUE SHARK

1980

CALAXIAN

1980

SPACE ZAP

1980

PAC-MAN

1980

CORF

1981

RALLY X

1981

WIZARD OF WOR

1981

730

739

652

653

760

762

761

645

851

852

742

866

902

932

873

935

961

ANDY DUCAY
SERVICE MANAGER

AD/dd

CABLE - MIOCO
TBLBX NO. 72-1596

MIDWAY Mr Gm CU. ch/cago phone 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 6013]

SERVICE BULLETIN

GAME (TABLE)

DATE

GAME NUMBER

GUN FIGHT

1975

604

TORNADO BASEBALL

1976

607

MAZE

1976

613

CHECKMATE

1977

617

DOUBLE PLAY

1977

621

ROTATION VIII

1978

627

CLOWNS

1978

634

BOWLING ALLEY

1979

749

SPACE INVADERS

1979

775

SPACE INVADERS II

1980

851

SPACE INVADERS DELUXE

1980

870

GALAXIAN

1980

869

SPACE ZAP

1980

920

EXTRA BASES

1980

889

PAC-MAN

1980

933

CORF

1981

927

RALLY X

1981

936

CABLE - M/DCO
TELBX NO. 72-1596

^. --_^^ ^^^ PHONE: ARE A CODE 3)2 45hl360

MIDWAY /WFG- CO. ch/cago phone.. 992-2250

A BALLY COMPANY

70750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

GAME (MINI)

SPACE ENCOUNTERS

SPACE ZAP

PAC-MAN
CORF

RALLY X 1981 937

DATE

GAME NUMBEP

1980

905

1980

908

1980
1981

934
926

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - MIOCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

GAME

GUN FIGHT (EARLY MODEL)

GUN FIGHT TO SPACE ENCOUNTERS
8080 SYSTEM (1975 - 1980)

SEAWOLFII

ROTATION VI 1 1

SUPER SPEED RACE

18 WHEELER

SUBMARINE

EXTRA BASES

SPACE ZAP

CORF

WIZARD OF WOR

POWER SUPPLY NUMBER

PC 80-901

PC A082-90400-H000
PCA082-90401-B000
PC A082-90400-E000
PCA082-90401-C000
PC A082-90406-B000
PC A082-90406-B000
PC A082-90408-D000
PCA082-9O411-A0O0
PCA082-90411-A000
PCA082-90411-A000

ANDY DUCAY
SERVICE MANAGER

AD/dd

CABLE -MIDCO

TELEX NO. 72-1596

M^^^^ ^%^% PHONE: AREA CODE 312 451-1360

IwK f iJ WWn J IwK r \Xm W W« CHtCAGO PHONE: 992-2250

A BALLY COMPANY
10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

GAME: All Midway Games

CONDITION: Flipping pennies into return cup for free games.

REMEDY:

Order from the Midway Parts Department an Anti-Penny Device Field Kit.
Part number A090-00064-0000.

Install as per instructions.

Andy Ducay
Service Manager

AD:jk
2/13/80

ANTI-PENNY DEVICE INSTALLATION
A090-000e4-0000

1.
2.
3.

4.

5.

REMOVE COIN ACCEPTOR FROM BRACKET.

REMOVE (3) HEX HEAD SCREWS THAT HOLD BRACKET TO DOOR.

REMOVE BRACKET FROM DOOR.

INSTALL ANTI-PENNY DEVICE MIDWAY PART NO. A090-00064-0000 USING (2)
6-32 X 5/16 SLOT HEX HEAD SCREWS MIDWAY PART NO. 0017-00101-0555.
MOUNT DEVICE WITH 1 SCREW FROM THE FRONT AND 1 SCREW FROM THE
BACK OF BRACKET AS SHOWN.

SCREW BRACKET BACK TO DOOR AND SNAP COIN ACCEPTOR BACK IN
PLACE.

MIDWAY MFG. CO.

A BALLY COMPANY

CABLE - M/DCO
TELEX NO. 72-1596

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

PHONE: AREA CODE 312 45 M 360

CHICAGO PHONE: 992-2250

ANTI-STRING DEVICE INSTALLATION
A090-00061-0000

SERVICE BULLETIN

1. REMOVE 1/8 LONG SLOT HEAD MACHINE SCREW.

2. INSTALLANTI-STRINGINGDEVICEMIDWAYPARTNO. 0090-00907-0000.

3 REPLACE 1/8 LONG SLOT HEAD MACHINE SCREW (STEP 1) WITH 3/8
LONG SEMS PHILLIPS HEAD MACHINE SCREW. MIDWAY PART NO.
0017-00101-0339.

4 REMOVE (2) #4 SLOT HEAD MACHINE SCREWS WHICH MOUNT
MICRO SWITCH AND SWITCH COIN GUIDE ASSEMBLY.

5 REPLACE SWITCH COIN GUIDE ASSEMBLY WITH NEW SWITCH COIN
' GUIDE ASSEMBLY MIDWAY PART NO. A090-00060-0000. MOUNT

MICRO SWITCH USING (2) #4 MACHINE SCREWS REMOVED IN STEP 4.

Andy Ducay
Service Manager

10

CABLE - M/DCO
TELEX NO. 72-1596

MIDWAY MFG. CO- ch/cago phone: 992.2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

June 11, 1981

SERVICE BULLETIN

GAME: WIZARD OF WOR

SUBJ ECT: NEW FEATURES

1 Wizard of Wor allows you to service the entire electronic system (with the
exception of the video monitor) from the front of the cabinet, (upright only).

2. Wizard of Wor features lighted coin slots.

3. Wizard of Wor is equipped with wheels on the back of the cabinet for ease of
movement.

4. Wizard of Wor is a talking video game that uses three speakers for improved
sound.

5 Wizard of Wor features Midway's positive approach to increase price of play
at the player's option. A single coin gives a player the standard number of
Worriors, two coins for two players. If additional Worriors are desired, 2
coins will give 1 player twice as many Worriors plus an additional bonus
Worrior. Four coins will give 2 players twice as many Worriors plus an
additional bonus Worrior for each player.

6. New service outlet.

7. Flourescent lamp fixture.

8 Wizard of Wor copyrighted and trademarked in accordance with the U.S.
copyright laws. Midway will protect its proprietary rights agamst any
infringers of Wizard of Wor.

ANDY DUCAY
SERVICE MANAGER

AD/dd

11

CABLE - M/OCO
TELBX NO. 72-1596

#%^% PHONE: AREA CODE 312 451-1360

MIDWAY MFG. CO. Chicago phonE: 992.2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

June 11, 1981

SERVICE BULLETIN

GAME: RALLY X

SUBJ ECT: RAM TEST MESSAGE CODE

1 . The position of rams given in our Ram Test Message on page 6 of the Parts
and Operating Manual is incorrect.

2. The correct Ram Test Message Code is shown in figure #1.

3. Each of the 2114 Rams are checked during the Ram Test and when any
irregularity is found a test message (e.g. Ram OL) is displayed and the test
series stops. If there is no irregularities in the rams the sound and switch

test begins.

4. The Ram Test is only for the 2114 Rams.

ANDY DUCAY
SERVICE MANAGER

AD/dd

12

FIGURE #1

Test Message

RAMOL

RAM OH

RAM1L

RAM1H

RAM2L

RAM2H

RAM3L

RAM3H

RAM4L

RAM4H

RAM5L

RAM5H

Position of RAM on PCB

6C

6A

6D

6B

6K

6J

6L

6H

6M

6F

6N

6E

13

CABLE - MIDCO
niBX NO. 72'}S96

^%#% PHONE: AREA CODE 312 451-1360

MIDWAY MFG- CO- ch,cago phone: 992.2250

A BALLY COMPANY

J 0750 W. GRAND AVENUE • FRANKLIN PARK, ILL. 60131

SERVICE BULLETIN

GAME: GORF

SUBJ ECT: NEW 6 CARD Z-80 SYSTEM USI NG A CARD RACK

************************************************************

GAME CARD (PC A084-90708-A873)
l&O CUSTOM CHIP (TWO)
TALKING CHIP -SC-01

ROM & RAM CARD (A082-91364-A000)

DOMESTIC & FOREIGN (A082-91374-A000)

RAMS 2114

ROMS 9316 OR 9332

CPU CARD (A082-91354-E000)
Z80 CPU

ADDRESS CUSTOM CHIP
DATA CUSTOM CHIP
CRYSTAL 14,318

RAM CARD (A082-91 356-0000)
TWO RAM CARDS
16 RAM EACH (M4027)

PATTERN CARD (PC 082-91 355-COOO)

SHIFTS INFORMATION AT A FASTER RATE

POWER SUPPLY (PC 082-9041 1-AOOO)
SAME AS SPACE ZAP

NOTE: ALL PC CARDS EDGE CONNECTORS ARE GOLD PLATED.

Andy Ducay
Service Manager

14

CABLE - MIDCO
TELEX NO. 72-1596

^^% r^r% PHONE: AREA CODE 3n 45)-)360

MIDWAY MFG. CO. ch/cago phone.- 992-2250

A BALLY COMPANY

J 0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

April 27, 1981

SERVICE BULLETIN

GAME: GORF

SUBJ ECT: ROM PROGRAM CHANGE

1. Rom program number two is now in all Gorf games which will make the
game harder to play after the 5th mission .

2. The roms will not be interchangeable between program number one and
two.

3. The rom code and board location of program number one and two roms. See
the code and location chart.

4. The rom location on domestic and foreign rom/ram boards are different.

ANDY DUCAY
SERVICE MANAGER

AD/dd

15

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 6013)

CABLE - MIDCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

ROM COPE AND LOCATION CHART

Domestic Rom/Ram Board
PCA082-91364-A000

PROGRAM NUMBER ONE

ROM CODE

LOCATION

M873A-0850

x-1

M873B-0850

x-3

M873C-0850

x-5

M873D-0850

x-7

M873E-0850

x-11

M873F-0850

x-1 3

M873G-0850

x-15

M873H-0850

x-1 7

Foreign

Rom/Ram Board

PC A082-91374-A000

ROM CODE

LOCATION

M873A-0850

x-1

M873B-0850

x-2

M873C-0850

x-3

M873D-0850

x-4

M873E-0850

x-5

M873F-0850

x-6

M873C-0850

x-7

M873H-0850

x-8

16

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/DCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

ROM CODE AND LOCATION CHART

Domestic Rom/Ram Board

PCA082-91364-A000

PROGRAM NUMBER TWO

ROM CODE

873-109AXR-

873-109AXR-

873-109A>;R-

873-109AXR-

873-109AXR-

873-109AXR-

873-109AXR-

873-109AXR-

AXSD
BXSD
CXSD
DXSD
EXSD
FXSD
CXSD
•HXSD

LOCATION
x-1
x-3
x-5
x-7
x-11
x-13
x-1 5
x-1 7

ROM CODE

873-109AXR-
873-109AXR-
873-109AXR-
873-109AXR-
873-109AXR-
873-109AXR-
873-109AXR-
873-109AXR-

AXSD
BXSD
CXSD
DXSD
EXSD
FXSD
-CXSD
-HXSD

Foreign Rom/Ram Board
PCA082-91374-A000

LOCATION

x-1
x-2
x-3
x-4
x-5
x-6
x-7
x-8

17

CABLE - MiOCO
TBLBX NO. 72 1596

-«— ^^ ^^^ PHONE: AREA CODE 3T2 457-7360

MIDWAY MFG. CO. ch/cago phone.. 992.2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, ILL 60737

April 3, 1981

SERVICE BULLETIN

GAME: GORF

SUBJ ECT: ALLEN KEY 1/8" TAMPER PROOF WRENCH
(0017-00009-0484)

The operator can not service the control grip without this special wrench.
Enclosed, please find a spare tamper proof wrench.

ANDY DUCAY
SERVICE MANAGER

AD/pc

18

CABLE -M/DCO
TELEX NO. 72-1596

MM^^^ ^%#% PHONE: AREA CODE 312 45 M 360

Irl f 1/ wwn W twl ■ w ■ www ch/cago phone.- 992-2250

A BALLY COMPANY

J0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

March 30, 1981

SERVICE BULLETIN

GAME: PAC-MAN, RALLY X, & GORF

SUBJ ECT: ANTI-STATIC CLEANER APPLICATION

When a game has a plexiglas front glass and or tinted Plexiglas T.V. tube
overlay, anti-static cleaner must be used.

When using any anti-static cleaner, both surfaces of the Plexiglas must be
sprayed and cleaned individually. Also, as a new policy, we will be usmg this
same anti-static cleaner to clean the C.R.T, This is most important smce this is
the prime source of static discharge.

In the past we have been using a anti-static cleaner called K-Lux. We will
continue using this product until the stock has been depleted. We will then
begin using a new product called Merix Anti-Static No. 79 Concentrate
(0017-00008-0091). This concentrate must be diluted 1:10-1 part concentrate;
10 parts H20.

Please read caution label before using.

ANDY DUCAY
SERVICE MANAGER

AD/pc

19

CABLE - M/DCO
JBieX NO. 721596

_ -« tUtCf^ f^f% PHONE: AREA CODE 312 451-1360

iWt f 1/ WWi\ W IWt ■ W ■ W %/■ CHiCAOO PHONE: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

April 9, 1981

SERVICE BULLETIN

GAME: PAC-MAN, RALLY X & GORF

SUBJ ECT: NEW BACK DOOR, #350 KEYS

Some Pac-Man, Rally X & Gorf will have the new lllinis locks with #350 keys.

Extra Illinois locks with #350 keys can now be ordered from our parts
department.

All operators must order locks and keys from their local distributor.

ANDY DUCAY
SERVICE MANAGER

AD/pc

20

CABLE - M/DCO
TELEX NO. 72)596

r%^\ P^ONE: AREA CODE 312 451-1360

MIDWAY MFG. CO. Chicago phone-. 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

March 30, 1981

SERVICE BULLETIN

CAME: PAC-MAN (UPRIGHT & MINI)

SUBJECT: CREDIT MULTIPLIER

BYPASS JACK PC# A080-9109-A000

The credit unit bypass jack is not needed when a credit multiplier unit is used.
PC# A082-01348-C000.

The credit multiplier is for foreign games, for additional credits.

When the credit multiplier is missing the coin jack must be inserted to the
credit bypass jack for proper coin operation.

ANDY DUCAY
SERVICE MANAGER

AD/pc

21

CABLE - MtDCO
TELEX NO. 72-1596

_^ _-_^^ r^^\ PHONE: AREA CODE 312 451-1360

MIDWAY MFG. CO. ,,^^,^^ ,,^^,.^ ,,2-2250

A BALLY COMPANY

?0750 W. GRAND AVENUE • FRANKUN PARK, ILL 60131

May 15, 1981

SERVICE BULLETIN

CAME: PAC-MAN & RALLY X

SUBJ ECT: BRIGHTNESS ADJ USTMENT

WELLS GARDNER COLOR MONITOR (K4604 - 4)

1 . To set the brightness level on a Wells Gardner Color Monitor, use the Black
Level Control located ontthe interface PC Board.

2. Location of the Black Level Control can be found by following the logic board
video cable which will be connected to the Interface PC Board.

3. Do not alter the screen control on the neck board, this can distort the picture
when used as a brightness control.

ANDYDUCAY
SERVICE MANAGER

AD/dd

22

CABLE - M/DCO
JBLEX NO. 72-1596

^^ ^^\ PHONE: AREA CODE 312 451-1360

MIDWAY IwFG. CO. ch/cago phone.. 992-2250

A BALLY COMPANY

]0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

GAME: P AC-MAN

SUBJ ECT: CUSTOM CHIPS 6-D and 5-S

:|e:|c:|e3(c:|:3|c

**************************♦**************************'*

When the custom chips are not available due to a supply problem the
following alternate plug in units will be used.

1 . At location 6-D PC 082-91 383-BOOO Z80 sync buss controller.

2. At location 5-S PC 082-91 384-BOOO V-Ram Addresser.

Andy Ducay
Service Manager

AD/dc

23

CABLE - M/DCO
TBLBX NO. 72-1596

^^^^ PHONE: AREA CODE 312 451-1360

MIDWAY MFG. CO. ch/cago phone: 992.2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, HL 60131

11-13-80

SERVICE BULLETIN

GAME: PAC-MAN

SUBJ ECT: DIP SWITCH SETTING (7 & 8)

1. Switches 7 & 8 must be in the off position for proper game operation.

2. When switch #7 is on, a test of all racks is possible.

3. When switch #8 is on, the picture will lock up.

4. The above information will be added to all switch setting cards.

Andy Ducay
Service Manager

AD/pr

24

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, tlL 60131

CABLE - MIDCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

Januarys, 1981

SERVICE BULLETIN

GAME: P AC-MAN

SUBJ ECT: ROM-RAM TEST

************************************************************

BAD ROM LOCATION CODE

DISPLAY
M-Rom-O
M-Rom-1
M-Rom-2
M-Rom-3

DISPLAY
BadV Ram-0
BadV Ram-1
Bade Ram-0
Bade Ram-1
Bad W Ram-0
Bad W Ram-1

BAD RAM LOCATION CODE

LOCATION
6E
6F
6H
6J

LOCATION
4K
4N
4L
4P
4M
4R

ANDY DUCAY
SERVICE MANAGER

AD/pc

25

CAfltE - M/DCO
TELBX NO. 72-1596

llifr/^ f^f% P^Q^^-- ^^^^ ^Q^^ ^^^ 45?-? 360

Irl I £/ Vw /I I Irl « U ■ W W» CH/CAGO PHON5: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

November 19, 1980

GAME: SPACE ZAP, GORF & WIZARD OF WOR

SUBJ ECT: Card Rack System Test Equipment

************************************************************
To aid board repair the following test cards are available.

1 . A Ram Test card to locate a bad Ram. A082-91516-A000.

2. A Card Rack Test card which is used with the Ram Test Card and will also
test the pattern card. A082-91517-A000.

3. Order test cards from Midway's Parts Department.

Andy Ducay
Service Manager

AD/dc

26

CABLi - MiOCO
TELEX NO. 72-1596

mMgW\tMi£i\f Hiir/^ f^f\ PHONE: AREA CODE 312 451-1360

Irl f 1/ Vr M J Iwl ■ U ■ w \/« Chicago phone-. 992-2250

A BALLY COMPANY

10750 W, GRAND AVENUE • FRANKUN PARK, ILL 60131

December 11, 1980

SERVICE BULLETIN

GAME: SPACE ENCOUNTERS

SUBJ ECT: Strobe unit PC A084-91359-B645
Serial No. 101 to 3700

MODIFICATION: (see figure #1)

************************************************************

1 . Change resistor R3 and R5 to one of the following values.

1 . 300 ohms, 20 watts. 10% .
2.310ohms,20watts.10%.

2. Capacitor C-2 and C-3 should be 22MF. , 250 V.

3. Check electrically.

ANDY DUCAY
SERVICE MANAGER

27

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28

CABLB - M/DCO
Tf LEX NO. 72-1596

_^ -, _«_^i^ ^^^ PHONE: AREA C ODE 312 451-1360

MIDWAY MFG. CO- ch,cago phone: 992.2250

A BALLY COMPANY

J 0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

November 19, 1980

GAME: SPACE ENOUNTEIrS

SUBJECT: Trigger Switch Kit

***************************************************

1 . Due to field failures a new trigger switch is now available.

2. The switch and hand grip assembly kit may be ordered from the parts
department. (A645-00042-0000).

Andy Ducay
Service Manager

AD/dc

29

(O

tfe

I
CO>-

o
o
o

o
= I

UJCD S

<?< en
So

«>< 2
oi *-'

CM

O
<

■

in

z — ^
.OOUJ

— ' ^1—
iij 0:^-5

UJCDOCO

3IA-X3
O-Oh-li-

30

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • fRANKUN PARK, ILL 60131

CABLE - MiDCO
TELEX NO. 72-) 596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

GAME: Space Encounters

SUBJ ECT: Angle Encoders

1 . Due to a shortage of Encoders some games will have 25K pots, (two)

2. For proper operation of pots a A/C converter. PC A082-91377-B000 has
been added.

3. The A/C Converter PC is mounted under the control panel .

4. Refer to instruction adjustment for proper pot alignment.

Andy Ducay
Service Manager

AD/dc

32

SPACE ENCOUNTERS U.R. AND MINI
INSTRUCTIONS TO ADJUST CONTROL PANEL: "B" VERSION

1. Place adjustment switch (5) "OFF" and (6) "ON".

2. Press trigger button, located on steering control to set test mode.

3. On P.C. board A082-91377-B000, rotate Pot A clockwise and Pot B
counter-clockwise.

4. Push steering control forward, rotate vertical pot until defense ship is in
Its' furthest position. Back off pot until ship starts to come back down.
Tighten set screw.

5. Put steering control in its' furthest out position. Rotate Pot A until defense
ship stops in lower part of viewing area.

6. Put steering control all the way to the left.

7. Turn horizontal pot until defense ship is to the left side of the tunnel.

8. Tighten set screw.

9. Turn control to the right and adjust Pot B until the defense ship reaches
the right side of the tunnel .

A/G CONVERTER
P.C. A082-91377-B000

POT "A"

T Trr ml

POT "B'

um

10

1

10

33

CABLE - MIDCO
TELEX NO. 72-1596

r»^^ r^^\ PHONE: AREA CODE 312 451-1360

MIDWAY MFG. CO. ch/cago phone.. 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

CAME: Space Encounters

SUBJ ECT: Power Supply PC0080-00904H

Condition:

The power supply +5 voltage may shut down in certain games due to an
overload. The 0.18 5 watt resistor tolerance will affect the + 5 volts, shut down .

Modification:

1. Replace the 0.18 resistor with another 10% tolerance type (better
tolerance).

2. Replace the 0.18 resistor with a 5% tolerance if available.

3. Parallel a 1 .5 1 watt resistor across the 0.18 resistor (rear side).

4. Check game electrically.

Note: This power supply overload only occurs in Space Encounters.

Andy Ducay
Service Manager

AD/cm

34

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 6013]

CABLE - MIOCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451 1360

CHICAGO PHONE: 992-2250

April 16,1980

SERVICE BULLETIN

GAME:

SUBJECT:

Galaxian (Serial No. #101 to #8400)

Loss of Credit

MODIFICATION:

1. Install 100MF 10V capacitor to coin switch terminals as shown in
Figure #1.

2. Capacitor is only needed at one coin switch.

3. Check game electrically.

Figure #1

ORN-B

o

r.

100MF 10V
CAPACITOR

/ESt

COIN SWITCH

RED

Andy Ducay
Service Manager

35

CABlf-MIOCO

TBLBX NO. 72- T 596

Ailfff\IJ/il\^ tmCf^ f^f\ PHONE: AREA CODE 312 451-1360

iwM f 1/ Vr M I Irl ff U ■ \# %/■ CH/CAGO phonE: 992-2250

A BALLY COMPANY

?0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 6013)

April 29,1980

SERVICE BULLETIN

GAME: CALAXIAN & PAC-MAN

SUBJECT: StaticCondition Causing A False
Ram and Rom Test.

************************************************************

MODIFICATION:

1 . Order from the Midway Parts Department an Anti-Static Kit PC A865-
00078-0000 and install as shown in instruction diagram. (Fig. #1 )

2. Check game out electrically.

Andy Ducay
Service Manager

36

CABl£ - MIOCO
TBLBX NO. 721596

mMgr\tMi£k\f tmcf^ f^f% phone: area code 212 451-1360

iwi f 1/ Vr M F IW ff U ■ w w ■ CH/CAGO phone: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

February 11,1980

SERVICE BULLETIN

GAME: Galaxian

************************************************************

GAME BOARD TEST

If game board is good, the foliowing information will be displayed on the

screen:
OK

Coin Adjustment Setting
Bonus Adjustment Setting
No. of Gaiixip Per Game Setting

RAM/ROM TEST

If any of the Rams or Roms are faulty, the following information will be

displayed on the screen:

*'Bad Ram 1 " - indicates bad Ram at location 7N or 7P.

"Bad Ram 2" - indicates bad Ram at location 3F or 3H.

**Bad Ram 3'* - indicates bad Ram at location 4FH or 5FH.

''Bad Rom" - indicates bad Rom on memory board.
*NOTE: Early models were not equipped with memory boards. In these
models, ''Bad Rom" indicates bad Rom at location 7F or 7H.

CONTROL PANEL and COIN SWITCH TEST

To verify operation of any switch, close switch in question. If the switch is
operating properly, a game sound will emit when closure is made.
CAUTION: Be sure to return test switch to game mode when all tests are
completed.

Andy Ducay
Service Manager

AD/jk

38

MIDWAY MFG. CO-—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL. 60131

CABLE - MIDCO
TELEX NO. 72-7596

PHONE: AREA CODE 312 457-1360

CHICAGO PHONE: 992-2250

GALAXIAN LOGIC BOARD

SERVICE BULLETIN

^c************************************************* ***********

There are two (2) versions of the Galaxian Program. They are:

M866J-09S0

M866L-09S0

M866U-09S0

M866V-09S0

M866W-09S0

M866Y-09S0

M866Z-09S0-

CHARACTER-

PROGRAM.

NAMCO

2.

M866J-09S1
M866L-09S1
M866U-09S1
M866Y-09S1

CHARACTER-
PROGRAM.

MIDWAY

The Midway Roms and the Namco Roms CHARACTER CANNOT be mixed.
It will result in the super-imposing of the names in the attract mode of the

game.

However the Midway and Namco Program can be mixed with one exception
and that is the locations U & Y. If you use one you'll have to use the other or
you'll get a BAD ROM read-out.

39

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/DCO
TBLBX NO. 72-] 596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2750

SERVICE BULLETIN

May 6, 1980

GAME:
SUBJECT:

Galaxian (As of Serial No. 11,500)

Rom program identification (3rd Program)

1 . The 3rd program ciiange has new Bonus Values, (see Figure #1 ).

2. New program identification (Game, Location and Program).

M866 - U - 09S2
M866- V-09S2
M866-W-09S2
M866 - Y - 09S2
M866 - Z - 09S2

3. The 1st program version 09S0 and 2nd program version 09S1 can not
mix with 3rd program 09S2.

4. The 1st and 2nd program has 2716 Proms and also 2716 Proms mixed
with 9316 Roms.

5. If additional clarification is needed please call the service department.

6 New Program Bonus Values are as follows (Figure #1 ).

SW. 3 SW. 4

Bonus Galaxip at 7000 pts. OFF ON

Bonus Galaxip at 1 0,000 pts. ON OFF

Bonus Galaxip at 1 2,000 pts. OFF ON

Bonus Galaxip at 20,000 pts. ON OFF

Andy Ducay
Service Manager

40

CABLE - M/DCO
TELEX NO. 72-1596

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 6013)

PHONE: AREA CODE 312 451-1360
CHiCAGO PHONE: 992-2250

SERVICE BULLETIN

GAME: CALAXIAN

SUBJ ECT: Alternate PC A082-91 370-000

1.
2.

3.

4.

Due to a supply problem an alternate PC Board may be located at position
8F, 8H,and4J,4K.

The alternate PC Board replaces the Bi-directional Drivers 8216, 8304,
and 74LS245. (8F, 8H, 4J , 4K, 9B, and 5J ).

The ICs on the alternate PC Board are 74LS244 and 74S00.

The alternate PC Board can be removed and ICs 8216, 8304, and 74LS245
can be used in the proper location.

Andy Ducay
Service Manager

AD/dc
8/7/80

41

CABLE - M/DCO
TftfX NO. 72-1596

m^^% ^%#\ Pi^ONE: AREA CODE 312 451-1360

MIDWAY MFG. CO- ^,^^^^^ p^one: 992.2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, ILL 60131

June 5, 1980

SERVICE BULLETIN

GAME: Galaxian

SUBJECT: When Ram Test reads Bad Ram #2 and Rams are Good,

************************************************************
PROBABLE REMEDY

1 . Replace Bi-Directional Driver at location 9-B or 5-J {74C245).

2. Alternate chips 821 6 and 8304 may be used as replacements.

3. Refer to Galaxian Parts and Operating Manual component layout page
#20 for alternate locations.

Andy Ducay
Service Manager

AD/dc

42

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, ILL 60131

CABLE - MIDCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

November/, 1980

SERVICE BULLETIN

SUBJECT: MONITOR'S MIDWAY GAMES

******* **:|c***************************** *************** ******

MANUFACTURE MODEL NO. GAME

WELLS GARDNER 19K4500 (19") GALAXIAN UR

WELLS GARDNER 19K4601 (19") GALAXIAN UR & CT

ELECTROHOME G02 (25") GALAXIAN UR

ELECTROHOME G07-901 & 904 UPRIGHT & COCKTAIL

ELECTROHOME V-17 (15") SPACE ZAP, SPACE ENCOUNTERS MINI

WELLS GARDNER V1001 (19") SPACE ZAP & SPACE ENCOUNTERS

MOTOROLA M-500 (19") SPACE ZAP & SPACE ENCOUNTERS

ELECTROHOME G07 (13") PAC-MAN, GORF & RALLY-X

Andy Ducay
Service Manager

AD/dc

43

CABLE - MIDCO
TELEX NO. 72-1596

a^^^^ ^%^\ PHONE: AREA CODE 312 451-1360

twl I mJ Vr /I f fri ■ W ■ w w- ch/cago phone.- 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, ILL 60131

SERVICE BULLETIN

CAME: GALAXIAN, PAC-MAN & CORF

SUBJ ECT: Electrohome 19" Color Monitor

************************************************************

Static convergence (in the center of the monitor) is achieved by nnanipulating
four magnets located on the neck of the CRT nearest the base of the tube. The
middle pair of rings adjust the red and blue Crosshatch. The rear pair of rings
adjusts the blue/red to the green Crosshatch lines. Dynamic Convergence is
handled by tilting the yoke up, down, left and right, then securing it with
wedges. Refer to the game schematic for Diagnostic Tests that generate
Crosshatch and background colors.

A. Tilt the yoke up, down, left and right to achieve convergence around the
edges. Secure with one temporary wedge.

B. Rotate the center rings to adjust the red and blue seperation

C. Rotate the rear rings to adjust the magenta (red-blue) and green seperation;
when best results are obtained, seal the rings with nail polish.

D. Remove the temporary wedge from the yoke. Tilt the yoke again to adjust
the edges of the screen for minimum seperation and insert three new wedges.
These should have adhesive added to hold them permanently.

See figure #1 .

Andy Ducay
Service Manager

44

FIGURE 1

CRT

ir?1

It' Blue

f-

^

i

f

^^

tr

(FRONT VlEWl

Let the red ond blue lines come In line toy
turning two 4-pole mognets.

Green

Around
centre

m

(FRONT VIEWl

Let the green and magenta lines come in line
by turning two 6-pole magnets.

PURITY RINGS

RED 8c BLUE SEPARATION

MAGENTA 8t GREEN SEPARATION

LOCKING RING ON SOME MODELS
Red-^ Gf ^ B lue

Blue-f... ^
Green-

Red-

r¥TA

(FRONT VIEW)

"V

LV^CJ

-^Red
Green

Blue

Blue Green Red
Tilting the yoke upward will move the lir>es
0$ shown with the arrows.

Green

Blue

BHje^f^ Red

Tilting ttie yoke to the right will move the
lir>es as shown with the arrows.

45

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 6013?

CABLE - M/DCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

GAME: CALAXIAN

************************************************************

1. Proper video cable wire sequence for interface PC, Wells Gardner color
monitor 19K4500. (See Figure #1)

SYNC

RED GUN

GREEN GUN

BLUE GUN

r r r h' 'h H

G-R GRND

MONITOR INTERFACE

L _ ,- J

"CALAXIAN"

MIDWAY MFG, CO.

10750 W.GRAND AVE.

FRANKLIN PARK ILL. 60131

Figure #1

NOTE: The 19K4500 is used only in upright gannes.

46

2. Proper video cable wire sequence for interface PC, Wells Gardner color
monitor 19K4601 . (upright) (See Figure #2)

-; r r r r 'h

"CALAXIAN"
MIDWAY MFC. CO.

I MONITOR (HTEflFACE

L _ ,_ -I

Figure #2

NOTE: The cocktail table main cable is wired for the Electrohome monitor and
must be altered when installing a Wells Gardner monitor. (Same wire
sequence as above)

47

3. Proper video cable wire sequence for interface PC, Electrohome 19" color
monitor G07 - 901 & 905 (upright & cocktail table). (See Figure #3)

MAIN CABLE

W-Y

Y-B

KEY

R-W

G-R

0-R

ADAPTOR

UPRIGHT ONLY

Figure #3

R-W

W-Y

Y-B

G-R

0-R

O-R

INTERFACE PC

NOTE: 1. The adaptor Jack PC A080 - 91106 is used in upright games for
proper wire sequence.

2. The cocktail table wire sequence if for the Electrohome Monitor.

R-W

W-Y

Y-B

C-R

O-R

0-R

MAIN CABLE (TABLE)

48

4. Proper video cable wire sequence for interface PC, Electrohome color
monitor. C02 - 25 inch (upright). (See Figure #4)

"CALAXIAN"

MIDWAY MFC. CO.

10750 W. GRAND AVE.

FRANKLIN PARK, ILL. 60131

Figure #4

NOTE; Due to cable changes and other modifications the 25 inch color monitor
must be used.

49

Proper video cable wire sequence for interface PC, Electrohome color monitor
C07 CBO - 904. (upright & cocktail table). (See Figure #5)

NOTE:

FROM MAIN
CABLE

R-W

1
2
3
4
5
6

W-Y

Y-B

C-R

MAIN PC

G07-CB0

REMOVE 0-R

Figure #5

1 . The adaptor jack PCA080 - 91106 is used to eliminate wire changes in
upright games.

2. Not used in cocktail table games. (PCA080 - 91106).

3. The orange- red must go to 3 pin jack as shown.

AD/dc

Andy Ducay
Service Manager

50

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, til. 60131

CABLE - MtDCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

CAME: PAC-MAN, CORF AND RALLY-X

**

:K*:Ie*******************************************************

1. PROPER VIDEO CABLE WIRE SEQUENCE FOR WELLS GARDNER
COLOR MONITOR 19K4606
SEE FIGURE #1

MONITOR

INTCRFACC

L _ J

~1

.^^

' .^*

«-

W

1 o—

W-BRN

V-B

u^

' 3

C-k

-i«

FIGURE #1

NOTE- PAC-MAN, CORF AND RALLY-X UPRIGHT GAMES CAN USE 19"
ELECTROHOME OR WELLS GARDNER COLOR MONITORS.

MINI GAMES CAN USE THE G07-13 ELECTROHOME COLOR
MONITOR.

ANDY DUCAY
SERVICE MANAGER

51

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, ILL 60131

CABLE - M/DCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

GAME: PAC-MAN, GORF AND RALLY-X

************************************************************

1. PROPER VIDEO CABLE WIRE SEQUENCE FOR ELECTROHOME 19''
COLOR MONITOR G07-CB0

SEE FIGURE #1

0-R

o

d^

G-R

FIGURE #1

NOTE PAC-MAN, GORF AND RALLY-X COCKTAIL TABLES USE ONLY
ELECTROHOME MONITORS G07-CB0.

ANDYDUCAY
SERVICE MANAGER

52

CABLE - M/OCO
JELBX NO. 72-1596

PHONE: AREA CODE 3)2 451-1360

MIDWAY MFG. CO- ch/cago phone.. 992.2250

A BALLY COMPANY

?0750 W. GRAND AVfNUE • FRANKLIN PARK, ILL 60131

April 14,1980

SERVICE BULLETIN

GAME: Galaxian

SUBJECT: Wells Gardner 19 inch Color Monitor

****

*********************************************************

The four controls contrast, brightness, color and tint are not used. These
controls are located in the upper right side of the monitor panel.

The brightness control is located on the interface P.C. Board. (85-X0134-
001)

Andy Ducay
Service Manager

53

CABLE - MIDCO
TELEX NO. 72-1596

_^ mm^f% f^gX PHONE: AREA CODE 312 451-1360

iWi 1 1/ Vr At f Irf r U ■ w \/» Chicago phone-. 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

July 1,1980

SERVICE BULLETIN

GAME: GALAXIAN

SUBJ ECT: ELECTROHOME GO-2 COLOR MONITOR

MODIFICATION: AS OF SERIAL NO. 20509

1 . Due to a supply problem the 25 inch Electrohome monitor will now be used in
upright games.

2. See figure #1 for additional and deleted parts.

3. The modification prevents using the 19 inch monitors as replacements.

Andy Ducay
Service Manager

AD/bp

54

Figure #1

New Part No.

Name

Replaces Part No. Comment

0866-0091 3-OOXF

0866-00912-0000
0866-00507-0000
0866-00508-0000

0866-00914-0000

A866-00094-0000

0866-00127-0000
-0100

0866-00128-0000

0866-00129-0000

0866-00130-0000

Display Glass..... 0866-00900-OOXF New Part uses the same

blank glass.

Tinted Plexi 0851-00904-0000

Cabinet 0866-00500-0000

Monitor Support 2 Req'd Was not required on

standard game
5h jgl^ Was not requireq on

standard game.

Monitor Brkt. Assy Was not required on

standard game.

Side Mtg. Brkt Was not required on

standard game.

Back Shipping Brkt Was not required on

standard game.

Front Shipping Brkt Was not required on

standard game.

Support Brkt Was not required on

standard game.

These parts will be deleted:
Part No. Name

0866-00904-0000
0866-001 11 -OOXF
0866-00120-0000

T.V. Bezel

Monitor Shipping Brkt.

Chassis Brace

These parts will continue to be used:
Part Ng^ Name

0866-00124-0000
0866-001 26-OOXF

Re-lnforcingBrkt. 2 Req'd.
Monitor Brkt. 2 Req'd.

NAME

25" Color Monitor

2.5V R-G-B-lnterface P.C.

(Modified)

2.5V R-G-B-lnterface
Schematic

Galaxian Wiring Schematic

Low Voltage Cable Assy.

High Voltage Cable Assy.

Monitor Service Literature

TAG-"Modified 2.5V R-C-B
Interface"

TAG-''Unit Supplied with
25" Monitor''

Replaces
Part Number

Quantity

New
Part Number

17-00003-0294
Not Used Before

Not Used Before

M051-0866-B003
A866-00054-0000
A866-00051-0000
Not Used Before
Not Used Before

Not Used Before

1 A866-00099-0000

1 A084-91304-B162

1 M051 -00866- A027

1 M051-00866-C003

1 A866-00096-0000

1 A866-00095-0000

1 M051 -00866- A024

1 M051 -00866- A026

1 M051 -00866- A025

Delete: MT82 MTOO-00082-0000

55

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - MIDCO

TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

February 11,1980

SERVICE BULLETIN

GAME:

Galaxian

************************************************************

MODIFICATION:

To bench test a Galaxian logic board with a black and white monitor, the
following change must be made (see Figure #1 ) :

+7VDC

T RED

lOMF(lOV)

+ t 1 —

16 CRN

TO

LOGIC ^^
BOARD

U BLUE

17 SYNC

VIDEO

^#1

-WVNAAA/ —
470

IN 4148
GRND

330

5.1V

TO

B&W

MONITOR

rj

-^n

FIGURE #1

Note: The top and bottom may be slightly distorted due to horizontal
synchronization.

Andy Ducay
Service Manager

AD/jk

56

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/OCO
TELEX NO. 72-7596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

July 30, 1980

SERVICE BULLETIN

GAME: EXTRA BASES

SUBJ ECT: BALL CONTROL UNIT PC A082-91323-E000

************************************************************

MODIFICATION;

1. The Extra Bases Ball control PC A082-91323-E000 can be used on Shuffle
Board or Bowling Alley without any modification.

2. The Shuffle Board and Bowling Alley Ball Control unit PC A082-91323-
EOOO can be used on Extra Bases with the following modification

A. Change the two 51 K resistors to 33K.

B. Change the two 270K resistors to 51 K.

3. Check Electrically.

Andy Ducay
Service Manager

AD/dc

57

CABLE - M/DCO
TELEX NO. 72-1596

^%^\ PHONE: AREA CODE 312 451-1360

MIDWAY MFG. CO- ^^^^^^^ p^one.. 992-2250

A BALLY COMPANY

;0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

July 1,1980

SERVICE BULLETIN

CAME: EXTRA BASES

SUBJ ECT: Upright and Cocktail game Card Rack Ram Cards

(PC A082- 91356 -BOOO)

************************************************************

NOTE FOLLOWING;

1. In all upright games the Ram card must be plugged into jack J-1.
(J -2 is empty).

2. In all cocktail games we have two Ram cards which are plugged into jack
J-1 and J -2. These Ram cards are interchangeable.

Andy Ducay
Service Manager

AD/dc

58

CABLE - M/DCO
JBLEX NO. 72-1596

^^ /%/* PHONE: AREA CODE 312 451-1360

Iwl f 1/ Vw M f Irl ■ i> ■ W W ■ CH/CAGO PHONE: 992-2250

A BALLY COMPANY

J0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

December 26, 1979
SERVICE BULLETIN

GAME: Deluxe Space Invader

sH* ************************************************* **********

ATTENTION:

A. For proper game operation in play mode, switch #2 must be in the "on*'
position. PC A082-90700-A000.

B. The record name feature can be tested, or the high score can be raised as
follows:

HIGH SCORE AND NAME DISPLAY PROGRAM

1. Place switch #2 located on Game Logic Board (P.C A082-90700-
AOOO) in **OFF'' position.

2. Close coin switch to display one credit on screen.

3. Depress One Player Select Button. *Treset Mode" will be dis-
played on screen.

4. Depress One Player Select Button again to increase score until pre-
vious Hi Score is beaten.

5. Depress Fire Button to start game. When all laser bases have been
destroyed, the alphabet will be displayed on the screen. A new
name may now be programmed on the screen as indicated by instruc-
tions on Control Panel.

6. Place switch #2 located on Game Logic Board (P.C. A082-90700-
AOOO) in "ON*' position to reestablish game mode.

Note: To reset Hi-Score (to 5000) and Name Display, depress "ON-
OFF" switch.

Andy Ducay
y^Q.jI^ Service Manager

59

CABLB - MtDCO
reiEX NO. 72-7596

^/\ P HONE: ARC A CODE 312 451-1360

MIDWAY MFG. CO. ch,cago phone: 992-2250

A BALLY COMPANY

?0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

April 14,1980

SERVICE BULLETIN

GAME: Space Invaders Deluxe

SUBJECT: Game Board Auxiliary, PC A080-91366-A000

1. Due to a supply problem, we are temporarily out of the Custom LC.
MB14241 on the Game Board PC A082-90700-A000.

2. The plug in Auxiliary PC Board will be used until the Custom bit shifter
is available again.

3. The Auxiliary PC Board has 4 - 25S10 bit shifters and 4 - 74175 latches.

Andy Ducay
Service Manager

60

CABLE - MIOCO
TBIEX NO. 72-1596

^%^% P^ONE: AREA CODE 312 451-1360

MIDWAY MFG. CO. ch/cago phone,- 992^2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

May 16, 1980

SERVICE BULLETIN

CAME: Space invaders Deluxe

SUBJ ECT: Proms and Roms

*************************************************************

1. Due to a supply problem the Invader program may be all 2716 Proms or all
9316 Roms.

2 On occasion the Invader program will be a mixture 2716 Proms (single supply)
and 9316 Roms. The 2716 Proms will have pin #21 cut with a jumper wire
between pin #21 and pin #24.

3. When all 2716 Proms are single supply type the Mother Board Strapping is
different from 9316 and 2716 multiple type.

Andy Ducay
Service Manager

AD/dc

61

CABLE - MIDCO
TELEX NO. 72-1596

llilfmA#ilV tUtCf^ f^f% PHONE: AREA CODE 312 451-1360

iWt 1 1/ wwn J IwK r \3I ■ w %/■ ch/cago phone.- 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

GAMES: 18 Wheeler, Bowling Alley, Space Invaders and

Blue Shark

SUBJECT: Prom and Rom Identification

1 . The game number will identify which game Proms and Roms belong to,
as listed below:

18 Wheeler M-653-H
Bowling Alley M-730-H
Space Invaders M-739-H
Blue Shark M-742-H

Midway-Game-Locations

NOTE: The game number of each game can be found on the cover of the
parts catalog.

Andrew Ducay
Service Department

AD:dc

07/2/79

62

CABLE - MtOCO
TELEX NO. 72-1596

EWt 1 1/ Vr M f iWt r \Jlm \^%Jm CHICAGO PHONE: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

GAME: Space Invaders (Up-right and cocktail table)

SUBJECT: Prevent random garbage and extra credit condition

************************************************************

MODIFICATION:

1. All A084-90700-739-D game boards have three capacitors which are
not grounded (RRC Network).

2. Refer to Figure #1 for the location of 1 .0MF-25V capacitors.

3. On rear side of game logic board, solder jumber wires from negative side
of capacitor to ground (See Figure #1).

4. Check coin and control circuits electrically.

Andrew Ducay
Service Manager

AD/r
07/16/79

63

FIG. #1

[ tin I

< Trs, — I b sw

e:

Mil I

sn

~g^

CONNECT JUMPERS
ON REAR SIDE
AS SHOWN HERE

) 7414

f m &tP '

) 7m

CXI]

5 74161

r*NT. [-5sir 1

) 74161

iboicl

CONNECT THE
NEGATIVE SIDE
OF THESE 3
CAPACITORS
TO GROUND

) LM390C

I ?*t I

1 I20K I

: 1^^-

^ MYLAR.

76477

I ISOK )

OE,

a,0

CLCNJ

r 2.2H I

I 330A I
lllN4004

d

■oy-n^o

i~ir— I

5 74153

)74L5!5I

74175

)74L5I5I

:> 74153

)74LS15I

3 74i75

) 74 LSI 51

) 71153

)74L5l5t

} 74174

)74LSI5I

-jf 1 * ;).iMr. yy. cewamk.

) 74153

)74LSI51

) 74174

)74LSI5I

) 7442

) 74174

74174

MYLAW.

) 7404

7417

7417

t [iO»^t;_2V

! t^ott I

■r ">iMF.

D 7411

) 55G

MYLAK.

12 ■>■ |iOMf.

OE. OHi izr

.OlMF. ^t

0.1 MF.
IIOOV.

■'mylaw.

HlW4i4b I
[ltN4l4o I

CMKl]

I iucjk""]

)LM3900

n-Q-Q->n 1=^^^

^0.4TMF, H"'4t 4g i

J 401C

1 6fc6x I

I )'W4 l4e 1

I f80K 1

Cj^

i frBOK

)LM39uO

O^

)LM3^XX)

J30Pf.

■^a"AMic.

I ^-6^ 1

)LM3900

^lOMf.
TANT.

I 220K I

I K)OK i

I lOOK I

--OJMf.

[ IOk ']

I WOx I

1_2JK_I

sO-"*.

I- (ioMf ZSV \ -

i l ii*4>48 I

I^ OK I

4?o ^-f,

|"tO OK~ l
niM4HB" '|

)LN'39C'U

JiOOV.
MtLAR.

DO.IMf.
100¥._
MYLAR.

Sl3

.CW^/F. I 4.7M I

^MYLAW.

-^TANT.
^TANT.

~^. ]

•Tai^l

I feftoiT"

O.IWF.

luOV.
MYLAR.

I 'OOH i

I *TOiH 1

)Lk:-) vK"

- 470Hf.
CCDAWIC.

I 4 7f ■« I

'iC^ I Lj^

•^[■OMF. 2Sv"l

^tOK I I |tH4l4e I

_.Q.IMF,

_;joov.

MYLAR,

^ .7

ilOMF.

)25V.
'tant.

.O.IMF.
'lOOV.
MYLAR.

nyjT

I 4 70K 1

OK I

r looK

j-jlQU'f 2 5Y~ !-

Lioa.J

} 4006

iLM39jO

^30^'F.
- lERAMIC.

I [ m4l4f 1

SPACE INVADERS
A084-90700-D739

Zl

I 3.31*

1 I.SM
I £2W~

nM«;

4030

--,0.1 MF
J iOOV.
WYLAH.

_ .OOlMF.

wriAR,

64

CABlf - M/DCO
TELEX NO. 72-1596

_^ -« mmpg% f^f\ PHONE: AREA CODE 312 451-1360

IWa f 1/ wwn J Irf ■ w » w w» ch/cago phone .- 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

February 13, 1980

SERVICE BULLETIN

GAME: Space Invaders

CONDITION: Garbage Lines In Video and Extra Credit

*************************************************************

POSSIBLE REMEDY

1. Check game board for proper RRC capacitor grounding. (P.C. A804-
90700-D739).

2. Clean game board edge connector and inspect Mother board 72 pin
connector.

3. Measure +5, +12 and -5 voltages at edge connector of Mother board.
Adjust voltages using pots on Pov^er Supply.

4. Replace possible heat sensitive TI-8080 CPU v^ith 791 9 date code.

5. Add a Cor-Com line filter. (0017-00003-0114)

6. Inspect soldering of bit shifters on game board. (25S1 or 741 51 )

Andy Ducay
Service Manager

AD:jk

65

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - MIOCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

May 14,1979

GAME:

SUBJECT:

Space Invaders Upright and
Cocktail Table

Dip Switch Settings, Game Logic
Board (PC-A084-90700-739)

************************************************************

1. Upright Games

A. Switches 5, 6, 7 and 8 must be in on position.

2. Cocktail Table

A. Switches 5, 6, 7 and 8 must be in off position.

Andy Ducay
Service Manager

AD:jk

66

CABLE - MIOCO
TELEX NO. 72-1596

■ilfff\IJ/ilV tmCf^ f^f% PHONE: AREA CODE 312 451-1360

IW f 1/ WWr\ J twt ■ U ■ \^%Jm CHICAGO PHONE: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

December 11,1978

SERVICE BULLETIN

GAME: Space Invaders

SU BJ ECT : Game Logic Board

:^=C********************************** *************************

MODIFICATION:

1. Due to a supply problem the 25S10 shifter I.C.'s have been replaced
with 74151 data selector multiplexers.

2. Game logic board P.C. A084-90700-B000 have four 25S1 I.C.'s.

3. Game logic board P.C. A084-90700-C00 have eight 74151 I.C.'s.

Andy Ducay
Service Manager

AD:jk

67

CABLE - M/DCO
TELEX NO. 72-1596

tkMMr\tMiii\f tkMCf^ f^f\ P^Ot<^- Afi^A COPE 3T2 45) -1360

iWl f £/ WWn W iWl r \Mm \^\0m CHICAGO PHONE: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, ILL 60131

SERVICE BULLETIN

GAME: Submarine

*************************************************************

ATTENTION:

The target ship explosion light zero switch and sink target ship zero switch
must be closed for proper game operation. If either switch is open, dirty con-
tacts or loose cam set screws the coin counter will pulse and the game will
stay in the game over mode.

Andy Ducay
Service Manager

AD:jk
11/26/79

68

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W, GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/DCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

GAME: 18 Wheeler

CONDITION; Premature Game Over (games serial #101 to 300)

************************************************************

MODIFICATION:

1. Solder 0.1 MFD disc capacitor to the mother board PC A082-90400-
BOOO, location J-4. (See Figure #1 )

2. Check out game electrically.

AD/r
07/27/79

Andrew Ducay
Service Manager

(Figure #1

MIDWAY MFC, CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/OCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

18 WHEELER'; BACK DOOR REWORK
TO IMPROVE CABINET VENTING

CUT OUT VENT

AREA RIBS AS

SHOWN

RE-MOUNT EXISTING VENTS
FLUSH WITH 6 x Vi SCREW
(0017-00101-0014)

70

'18 WHEELER" PROJECTOR FANREWORK

Installation Instructions

1. Remove 6 screws holding projector light shroud to
pan and hub assembly.

2 . Remove old fan and platform .

3. Assemble bracket (Item 1) to new exhaust fan (Item 2)
as shown using self threading screws (Item 3).

4. This assembly gets fastened using the game holes and
screws as the old fan platform.

5. Drill 2, 3/16 dia. holes in bottom of shroud as per
dimensions on shroud rework detail.

6. Replace projector light shroud by first assembling 2
self threading screws through fan shroud to the fan
mounting bracket (Item 1) and then the 6 remaining
screws through the shroud to the pan and hub
assembly.

KIT PARTS LIST CONSIST OF

Item
1
2
3

Description
Bracket

Exhaust Fan Assy.
#8-32x5/16 Sit.
Hex. Hd. Mach.
Screw

Part No.

0653-00191-0000
A653-00074-0598
0017-00101-0598

1
1
4

^DIA. H0LE(2)

'~ \^^^^2'-\

EXISTING
HOLES

'16

SHROUD REWORK DETAIL

M051-00653-A028

71

CABte - MIOCO
TBLEX NO. 72-1596

mmmm^mMgm^^ Mil C /^ ^ f\ PHONE: AREA CODE 312 451-1360

iWl f 1/ Ww/\ J IwB r\Mm X^X^m CHiCAGO PHONE: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60731

February 11 , 1 980

SERVICE BULLETIN

GAME: Super Speed Race and Sea Wolf II

CONDITION: Reversed Image on GO-2 Color Monitor (25")

*************************************************************

Both Super Speed Race and Sea Wolf II use the Electrohome GO-2 color
monitor. In Sea Wolf II a mirror reverses the image from the monitor, but in
Super Speed Race the monitor is viewed directly.

If the monitor in either game is changed and the image comes up back-
wards, switch the yellow and green wires at pins #1 and #2 on the round male
connector coming from the yoke assembly to the geometry PCB #82-230010-
05.

Pin #1 should be yellow and pin #2 green for "direct** viewing.

Bob Norton
Service Technician

BN:jk

72

CABLE - M/DCO
TELEX NO. 72 1596

Jliffm4/ilV tkMCf^ f^f\ ^^O^^'- ^^^^ <^OD^ 312 45} -1360

Mwl 1 1/ Vr M f Irl f U ■ \# !/■ ch/cago phone.- 992-2250

A BALLY COMPANY

]0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

GAME: SEAWOLF II, EXTRA BASES, SPACE ZAP & CORF

SUBJ ECI: Custom chip identification (I/O, Address, and Data)

************************************************************

The following numbers will identify the special custom chips used in Seawolf
II motherboard (PC 084-90002-B-625):

I/O 2720 or 0066-1 1 7XX

Address 2719 or 0066-1 15XX

Data 2721 or 0066-1 16XX or 2860

Andrew Ducay
Service Manager

AD/r

07/10/79

73

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, HL 60131

CABLE - M/DCO
mfX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

SEAWOLF II

ELECTROHOME COLOR MONITOR (25")

SYMPTOM: TV loses anode voltage, 30,000 VDC approximately,

after 5 or 6 seconds.

CAUSE: On the Electrohome color monitor, the high voltage is

protected by an overvoltage protection circuit. This
circuit is probably too sensitive, or the 125 volt DC
power supply is faulty.

SOLUTION : First determine if 1 25 volts DC is available on the power

supply PCB. C940 could make it more sensitive if it has
excessive leakage. Check R928B 680k .5 watt, if it*s
missing or clipped out, replace it. If R928B 680k is being
used, change this resistor to one with a value of 510k
.5 watt. If it is still too sensitive, change resistor to 470k
.5 watt.

REACTANCE
CONTROL

HOR. DRIVER

Q926

_«• 4- 2?c V

CUPPEO i3 'TOURED PDR ,
R930 AOkJUSTMeNT

■I T FACTORY i

m NOMINAL ^vALUE
FiC TCRYS£L£CTED

Andy Ducay
Service Manager

AD:ih
05/78

74

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/DCO
reiBX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

GAME:

SERVICE BULLETIN

Rotation VIII

CONDITION: Power reset failure when turning game on causing coils

to pulse or stay energized.

************************************************************

MODIFICATION:

1. Replace the 2.7 volt zener in power reset circuit with a 7.5 volt zener.

2. Cut trace at pin 4 LM339 location A2-3. (See Fig. 1 )

3. Solder a 1 K resistor from pin 4 LM339 to the cathode of the 7.5 volt
zener. (See Fig. 1)

4. Solder a IN4148 diode from pin 4 LM339 to ground (pin 12 LM339).

5 . Check game out electrically.

Andrew Ducay
Service Manager

AD:jk
05/3/79

75

FIG. #1

H

<

U

u.

^

Q

>

O

o

LJJ

<

to

H

LU

O

Qi:

Q£:

Qd:

UJ

^

o

a.

76

CABLE - M/DCO
TELEX NO. 72-} 596

tkM M r\tAi Jk^f tmCf^ f^f\ f'^O^^'^ ^^^^ CODE 3n 4S}-}360

IWK 1 1/ WwM J IWt r\Mm \^\Jm CHiCAGO PHONE: 992-2250

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKUN PARK, ILL 60131

December 21, 1978
SERVICE BULLETIN

GAME: Rotation VIII

SUBJECT: Logic Board A084-91313-G627 (Sound)

***********************************************************

When changing from an 'T'* board to a "G" board, cut the orange or yellow-
green wire at power supply jack "C" pin #6. (Prevents damage to amplifier
I.e. LM377.)

Andy Ducay
Service Manager

Note: When changing from a "G" board to an "F" board, the orange or
yellow-green wire must be connected at "C" jack, pin #6. (For
proper sound.)

AD:jk

77

CABLE - M/DCO
TELEX NO. 72- J 596

JUIffmii/AV tmCf^ f^f% PHONE; AREA CODE 312 451-1360

IwK f £/ rr/l f Irf r U ■ w wa ch/cago phone: 992-2250

A BALLY COMPANY

J0750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

SERVICE BULLETIN

V

GAME: Bowling Alley

SUBJ ECT: Rams, Proms and Roms

***************************************************

The BOWLING ALLEY game microprocessor system has been programmed
to detect a defective Ram, Prom and/or Rom. To utilize the test, proceed as
follows:

1. Set switch #8 to on position (A084-90700-C730).

2. Activate coin door tilt switch.

3. The Ram test sequence will scan and vertical lines will appear.

4. When all Rams are good, the scan will be continuous.

5. When a Ram is defective, dark vertical columns will appear (refer to
Figure #1 for method of locating a bad Ram).

6. When Ram test is completed and all Rams are good, the T.V. screen will
blank out to indicate a bad Prom or Rom by displaying letters locating
it

7. When Proms and Roms are good, the Ram scan will be continuous.

8. Return switch #8 to off position (A084-90700-C730).

9. The Ram scan will stop and game will return to normal when the tilt
switch is activated.

NOTE: Rams must be good before Prom and Rom test can be made.

Andy Ducay
Service Manager

AD:jk

3/2/79

78

GAME:

SERVICE BULLETIN

Bowling Alley

SUBJECT: Figure One - Method of Locating a Bad RAM

************************************************************

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RAM
LOCATION

15 14 13 12 11 10 9 8 15 14 13 12 1 1 10 9 8

1. When one or more colunnns are nnissing or altered, this would indicate a
RAM problem.

2. Use Figure One TV display to determine location of faulty RAMs.

AD/r
12/27/77

79

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80

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - M/DCO
TEtEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

October 13, 1980

SERVICE BULLETIN

GAME: SEA WOLF \. 280Z. GUIDED MISSILE, LAGUNA RACER

SUBJ ECT: 8516 & 2716 Prom Strapping Information (16K)

1 . Refer to figure #1 for proper strapping of jumpers and capacitor removing or
relocating.

2. Cut pins #18 and #20 of each prom and jumper as shown in figure #2.

3. Check electrically.

FIGURE #2

JUMPERS

PROM

PIN #20

PIN#18

REVERSE PIN #18 & 20 AS SHOWN

Andy Ducay
Service Manager

81

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - MIDCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

GAMES:

SUBJECT:

Gun Fight
Sea Wolf
Tornado Baseball

Power Supply P.C. 80-904

What may look like a logic problem may be a power supply failure.
Check the following;

(1) +5V,-5V,and+12V.

(2) The 24 pin jack for defective wiring or pin connectors (female and male).

(3) Cold solder connections, capacitors, diodes, resistors, and transistors,
(rear side).

(4) Damaged printed circuit traces.

(5) Loose parts on heat sink.

(6) Make repairs and check game out electrically.

AD:r
09/30/76

82

MIDWAY MFG. CO.—

A BALLY COMPANY

10750 W. GRAND AVENUE • FRANKLIN PARK, ILL 60131

CABLE - MIDCO
TELEX NO. 72-1596

PHONE: AREA CODE 312 451-1360

CHICAGO PHONE: 992-2250

SERVICE BULLETIN

GAMES: Gun Fight, Sea Wolf, and Tornado Baseball

CONDITION: Randonn errors appearing on TV screen.

1. Garbage

2. Lock-up condition

3. False ram scan (Tornado Baseball)

MODIFICATION: Add two .01 MFD capacitors to the mother board,

PC 80-900; reset circuit (CPU) as shown below.

1 . Solder .01 MFD capacitor between pin #10 and ground (-5 volts).

2. Solder .01 MFD capacitor between pin #10 and +5 volts (VCC).

GROUND

PIN #10
^ RESET CIRCUIT (ORN.)

PC 80-900- D
MOTHER BOARD

+5 VOLTS

AD:r

10/05/76

83

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CABLE - MIDCO
JELBX NO. 72? 596

_^ -- -__^ /*/> PHONE: AREA CODE 312 451-1360

iWt f 1/ ¥r M I IW r U ■ W %/■ CH/CAGO PHONE: 992-2250

A BALLY COMPANY

]0750 W. OR AND AVENUE • FRANKLIN PARK, ILL 6013)

MONITOR MANUFACTURERS

MOTOROLA INC.

Display Products

455 East North Avenue

Carol Stream, Illinois 60187

Telephone: (312) 231-4400

Chris Petri, Product Service Manager

WELLS GARDNER ELECTRONICS CORP.
2701 North Kildare Avenue
Chicago, Illinois 60639

Telephone: (312) 252-8220

Norm Schumacker, Service

ELECTROHOME LIMITED
809 Wellington St. N.
Kitchener, Ont. N2G4J6

Telephone: (519) 744-7111

Tom Van Gink, Program Co-Ordinator

86

Glossary of Computer Terms

Silicon Valley - The region around Sunnyvale, California (south of San Francisco) is known as the
birthplace and present capital of the microprocessor. Fairchild Instrument is considered as the
pioneer company in this area with most of their engineers leaving and branching out to form com-
peting companies such as Intel and Zilog.

Hardware ■ The physical components of a system, i.e. transistors, capacitors, microprocessor,
data chip, incput-output chip, address chip.

Software - Can be best defined as the program, whether it be resident permanently as a fixed set
of instructions as in ROM or inputed as data by the user.

Bit - A word is one logical unit of information consisting of 4, 8, 12 or 16 bit (a bit is a binary digit,
either 1 or 0, high or low). An 8 bit microprocessor requires 8 bits of data and the word size for an 8
bit microprocesssor is therefore 8 bits.

Byte - Eight bits are called a byte.

Memory - That part of a system which is used to store both the programs which will execute on the
processor, and the data which will be manipulated by the system.

ROM - Read Only Memory is a device that has data permanently entered into it to be outputed on
demand, a fixed set of instructions.

RAM - Random Access Memory is a type of memory in which any byte can be accessed (that is,
written into or read from) after any other byte. The random access capability of RAM makes it
easier to use, and allows much faster operation.

Address -The position or location of the word within the memory is called its address.

LSI technology - Large Scale Integration technology allows the implementing of 1 to 15,000 tran-
sistors on a single chip.

CPU -The CPU (central processing unit) is basically a microprocessor. The CPU Is divided into two
units, the ALU (arthimetic logical unit) and the CU (control unit). The function of the ALU is to per-
form arithmetic and logical operations on data passing through it. The CU will sequence the
operation of the entire system. The control unit fetches, decodes and executes successive
instructions stored in the memory system.

Microprocessor - An LSI component which implements the functions of an arithmetic-logical-unit
plus its associated control unit in a single chip.

Register - A fundamental unit inside a micoprocessor which is a specialized memory. It can be
thought of as a blackboard where data is written so it can be easily accessed and changed.
Registers usually contain the data the processor is currently working on. Generally, micro-
processors with more registers are more powerful and easier to program to do a given job.

Intel 8080 - First off-shoot of the 8008. This machine inspired the development of most microproc-
essors today, such as the Motorola 6800, Rockwell PPS8, Signetics 2650, and the Zilog Z-80. The
8080 is a general purpose middle of the road microprocessor. Its instruction set and other
characteristics are good examples of microprocessors in general, being neither extremely
simplified, nor extremely powerful, nor particularly unusual.

Motorola 6800 - A machine that was introduced as direct competition to the Intel 8080. The 6800
has two apparent advantages to the 8080, it requires only one voltage level to operate as com-
pared to the three needed by the 8080, hence a more simplified power supply is needed. Secondly,
the 6800 hasd an additional two pins.

F-8 (by Fairchild) - This microprocessor is designed for specialized applications where the
microprocessor is permanently incorporated as part of a specific piece of equipment unrelated to
computing. This microprocessor is known for the large amount of supporting circuitry and
devices it needs for operation.

Zilog - Designers of the Z-80. This microprocessor was developed by many of the men who design-
ed the Intel 8080. This device is probably the first case where experienced microprocessor
designers, after having seen the results of their work used in practical applications, designed a
new general purpose microprocessor.

The Z-80 executes 158 different instructions, which increase to 696 operation codes, com-
pared to 78 instructions and 244 operation codes for the 8080A (the first version of the 8080).

87