Williams Robotron May 82 Instruction Manual

16P-3005-101
May, 1982
INSTRUCTION MANUAL
FOR
UPRIGHT AND COMPACT GAMES
Including procedures for…
• Operation
• Auditing
• Adjustment
• Diagnostics
For service…
NOTE NEW TOLL-FREE
TELEPHONE NUMBERS:
800-621-1253
In Illinois call:
800-572-13243401 N. California Av.
Chicago, IL 60618
Cable Address: WILCOIN, CHICAGO
(312) 267-2240 

2
ROM SUMMARY
Current Robotron Games use blue-label ROMs.  Earlier games
have either yellow or red-label ROMs, which are interchangeable
and may be mixed in the same game.  DO NOT attempt to mix
blue-label ROMs with red or yellow-label ROMs.
ROM    PART NO. DESCRIPTION
ROBOTRON 1B A-5343-09898 PROM, 4Kx8, RED or YELLOW LABEL
A-5343-09945 PROM, 4Kx8, BLUE LABEL
ROBOTRON 2B A-5343-09899 PROM, 4Kx8, RED or YELLOW LABEL
A-5343-09946 PROM, 4Kx8, BLUE LABEL
ROBOTRON 3B A-5343-09900 PROM, 4Kx8, RED or YELLOW...

3
POWER TURN-ON
CAUTION - This game must be plugged into a properly grounded outlet to prevent shock hazard and to ensure proper game
operation.  DO NOT use a cheater plug to defeat the ground pin on the line cord, and DO NOT cut off the ground pin.
WHEN THE GAME IS FIRST TURNED ON it produces a sound.  Simultaneously general illumination should come on
and a moment later a scanning “rug pattern” indicating the RAM test should appear on the screen.  Next the rug should
become stationary as the ROM test...

4
CLEARING BOOKKEKPING TOTALS
1. Depress ADVANCE to display Game Adjustments.
2. Operate MOVE joystick to position cursor on CLEAR BOOKKEEPING TOTALS.
3. Push FIRE.
4. Depress ADVANCE.
Figure 1. Bookkeeping display
GAME ADJUSTMENTS
In the Game-Over Mode open the coin door with AUTO-UP, and depress the coin door ADVANCE switch twice to cause a
CRT display as shown in Figure 2.
To select and then set functions to the desired values, use the MOVE (UP-DOWN) joystick to select the that is to be changed
and...

5
Figure 2. Game Adjustment
Highest Score Signature
The number of letters allowed the highest scoring player for entering his name can be varied from 3 to 20 and is recommended
as 3.  If objectionable words are entered as the signature name, you can change the lettered entry leaving the highest score the
same.  See Setting Highest Score Name.
Restore Factory Settings
1. Position the cursor on RESTORE FACTORY SETTINGS.
2. Push FIRE.
3. Depress ADVANCE.
Resetting High Score Table
1. Position the cursor on...

6
Table 1. Pricing Schemes
COIN DOOR MECHANISM CREDITS/MONEYTABLE 2
STANDARD SELECTION/
CUSTOM KEY
Twin Quarter
Quarter, Dollar, Quarter1/25¢, 5/$1
2/50¢, 5/$1
1/25¢, 4/$1
2/50¢, 4/$1
1/50¢, 3/$1, 4/$1.25
1/50¢, 3/$1, 7/$2
1/50¢, 3/$1, 6/$2
1/50¢A
B
3
C
D
E
1
5
1DM, 5DM 1/1DM, 6/5DM 2
20-Cent, 50-Cent 1/20¢, 3/50¢ F
1 Franc, 5 Franc 1/2F, 3/5F 4
25 Cent 1/25¢, 4/1G 6
1 Guilder 1/25¢, 5/1G G
5 Franc 1/5F, 2/10F 7
10 Franc 1/10F 8
1 Franc, 2 Franc 2/1F 5/2F 2
100 Lire, 200 Lire 1/200 Lire 8
Twin Coin 1/1...

7 TROUBLESHOOTING PROCEDURES
Certain types of game malfunctions may inhibit the games
diagnostic or display faculties.  Troubleshooting procedures
for most of these types of malfunctions as well as
malfunctions that permit self-diagnosis are covered below.Our troubleshooting algorithm begins with 
Power-Up and
continues until 
Game Over Mode.  All procedures can be
performed with minimal test equipment or merely by
observing the game itself.
POWER-UP TESTS
NO GENERAL
ILLUMINATIONNO INITIAL VIDEO
(RUG...

8
+5v DC ADJUSTMENT (R10 & R24)
Before adjusting the voltage output, always check the output at the supply for AC hum.  This hum should never rise above
0.005v on the +5v DC supply.  If it does, consult your schematic drawing set for proper DC voltages throughout the circuit.
Test for these with the DC setting of your multimeter.  Make a second check using the AC setting.  Pay particular attention to
readings at TP5 (top of capacitor C10).  If the voltage here is too low (less than +11v DC) or you find...

9
DIAGNOSTIC MODE RAM AND ROM TESTS
TESTROM BOARD
LEDs
RECOGNIZE
CONDITIONROM BOARD
LEDs
IDENTIFY
CHIPSVIDEO REMEDY
ROM “2” means ROM
error.2-digit ROM
chip number“ROM ERROR” and ROM chip no. (1) Turn power off.
(2) Replace suspected chip.
RAM “1” means RAM
error.Bank number
first . . . then
chip number in
bank (see figure
3)“RAM ERROR” followed by RAM
bank number and chip number (Note:
with multiple RAM failures this
display may not appear)(1) Check for normal voltages on
indicated RAM chip: -5v/pin 1,...

10
MORE DIAGNOSTIC MODE TESTS
TEST & PROCEDURESVIDEO
SEQUENCESREMEDY OR ADJUSTMENT
RAM 1B RAM 2B
1 Light red screen
2 Red screen
3 Dark red screenToo-light or
too dark red
or gray bandMagenta band
4 Light green screen
5 Green screen
6 Dark green screenYellow band Cyan band
7 Light blue screen
8 Blue screenMagenta band Too-light or too
 dark blue or
gray band
4 Light green screen Green band Dark green band
or gray band
5 Green screen Light green band Dark green band
or gray band
COLOUR RAM TEST
(Test 6)...