Star Tech Journal

Issue: 1981-November - Vol 3 Issue 9

S*1J NOVEMBER 1981 3
ATARI
''CENTIPEDE''
T
R
A
C
K
B
A
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M
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There appears to be a misunderstanding as to the mini-track
ball problem and its solution. First of all, the problem is a
marginal optical coupler component on the mini-track ball PCB.
The Atari solutions have been:
1. On the Logic PCB, the value of the input track ball
resistors R83 to R86 and R130 to R133 were reduced from
lOK ohms to 3.3k ohms. 1
2. The generation of an A-035220-02 version of the mini-
track ball PCB. This is a selected PCB 2 to be used with
the "Centipede" games using Rev A through Rev F
Logic PCB's.
3. The manufacturing of a Rev G logic PCB which can be
used with either -01 or -02 versions of the mini-track
ball PCB's.
NOTE: In order for the -02 versions to function properly, make
certain the input track ball resistors on the logic PCB's are 3.3k
ohms. Some older games may still have the 10k ohm resistors.
Some individuals in the field are changing the input track ball
resistor values to match the mini-track ball PCB. This may be a
temporary fix for the specific track ball PCB being used.
However, if a -02 version is later used, the input track ball
resistors on the logic board should be changed to 3. 3 k ohms.
'Some operators have reported optimum results using 6.8k resistors.
'Selected using a 3.3k load. Dark current equals less than .9v Light current equals greater than 4.0v
S• TJ NOVEMBER 1981 4
PHILADELPHIA
VENDING
SERVICE
BALLY
''CENTAUR''
S
E
R
V
C
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N
O
T
215-698-2738
E
S
********
• Ace Locks Rekeyed $1.00
• Ace Keys
$1.00
• American H-10 Pad locks
As Low As $ 7 .00 each
1.
********
A few irregular non-magnetic oversized pinballs may
have been shipped in "Centaur" prototype games.
Check pinballs with a magnet. Wrong size pinballs will
not have magnetic properties. The correct pinball
(M-168-26), 1 ½ 6 inch diameter will have magnetic
properties.
We carry a complete line of
American padlocks. We also
carry all of the game speed-
up kits at low prices.
For further information please
call or write :
Philadelphia
Vending
Service
2.
881 O Dewees St.
The tilt feature on "Centaur" is a new option.
Phila., PA 19152
With switch 23 ON, the feature acts as a standard
player tilt, as with previous games. However, with
switch 23 OFF, the player may tilt the first time and
The
continue to play. After the first tilt the backglass will
Mean Little Kit
display a warning light. The second tilt will cause the
game to go into "game over" position for that player.
********
3.
New compact 24-piece ki1 of electronic tools
for engineers , scientists, technicians ,
students, executives. Includes 7 sizes
screwdrivers, adjustable wrench , 2 pair
pliers, wire stripper, knife, alignment tool,
stainless rule, hex-key set, scissors , 2 flex -
ible files, burnisher, miniature soldering
iron, solder aid, coil of solder and desolder-
ing braid. Highest quality padded zipper
case, 6 x 9 x 1 ¾" inside. Satisfaction
guaranteed. Send check , company purchase
order or c harge Visa or Mastercharge. We
pav ti\-e shipping charges.
JTK-6 Tool Kit . .... . ....... . . . . .. $90.00
,~- • •-= ' ·-
i=-----------=--
""• -
~
F
."'"· ~ ·
-~
- -
!°• A ~~v o ~
Page after page of
hard-to-find precision
tools. Also contains
complete line of tool
kits and tool cases.
Send for your free
copy today!
JENSEN TOOLS INC.
1230 South Priest Drive
Tempe, AZ 85281
"Centaur" Multi-Ball Trough
''Centaur'' utilizes the newly developed ball trough
system. This trough stores four balls below the playfield
and it tells the game, via the fourth ball trough switch,
to return the fifth ball to the outhole. At the start of the
game, the switch also controls the powering up of the
game. If this switch is not closed by the presence of the
fourth ball, displays will show all zeros. Two other
switches are also used. The fifth ball switch is a safety
switch which will clear out the extra ball, since only
four balls belong below the playfield, and the first ball
switch which tells the game that it has a ball to deliver
to the kicker.

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