MAIN BOARD INPUTS - CONTINUED
The Space Ballz input/output board utilizes 5 input IC's to control all inputs used within the game. In Space
Ballz, only three of the five IC's are used U08, U09, U10. The remaining two IC's U11 and U12 are not used
to control any input function. These two IC's can be used to replace the other IC's should they become
corrupt.
SPACE BALLZ - MAIN BOARD INPUT CHART CONTINUED
IC
INPUT #
CONTENT
PICTURE
U1
2
33
34
35
36
37
38
39
40
U12
IS NOT UTLIZED IN SPACE BALLS. THIS
SPARE IC CAN BE USED IN
U08
,
U09
, &
U10
TO RECITFY POTENTIAL ISSUES WITH
THOSE IC'S. IF YOU SWAP IC'S, BE SURE TO
PUT THE DEFECTIVE IC BACK INTO
U12
BEFORE POWERING THE UNIT ON. IF THIS
FIXES YOUR PROBLEM, BE SURE TO
RECORD THAT THE IC IN
U12
IS NOW
DEFECTIVE AND CANNOT BE USED AGAIN
IN ANOTHER SOCKET
Jennison Entertainment Technologies
Space Ballz Service Manual
Page 50
