Bally 5000 Plus, Manual

Page: 324 / 388

1 2 . VACUUM FLUORESCENT D I SPLAY BOARD
Troub l eshoot i ng ( co n t ' d )
1 2- 1 6
DOT MATR I X MULT I P L EX I NG F LOWCHART
';'
:;;
'"
DOT M AT R I X
M U LT I P L E X I N G
F A U LT I S O L AT I O N
REPLACE
SPE C i f i C C H I P
( U I -U 1 0 )
GOOD
SEE D I SPLAY
fLOWC HART
NOTE : 1 . I dent i fy the dot matr i x co l umn and row o f the m i ss i ng dots . See the board schemat i c .
2 . I dent i fy t he character row o f the m i ss i ng dots .
3 . Based on 1 & 2 re l ate the prob l em to a spec i f i c l atch/dr i ver
( U l -U 1 0) .