Bally 5000 Plus, Manual

Page: 261 / 388

9 . R E E L CONTROL BOARD
Theory of Oper a t i on
T h e r e e l con t r o l boa r d h a s 5 c i r cu i t s , e a c h suppor t i ng 1 r ee l .
ope r a t e s I ndepende n t l y .
E a c h c i r cu i t
So f t wa r e w r i t e s a s e quence o f d a t a f r om t he MPU boa r d , t h r ough t h e I /O boa r d , to
t he r e e l con t r o l boa r d . T h i s d a t a a c c e l e r a t e s t h e s t ep p e r mo t o r at + 2 4 VDC and
r un s t he mo t o r s t ea d y at + 1 2 VDC .
The g r ound p i ns be t we e n t h e da t a I i ne s i n t h e J 2 conne c t o r p r o v i de no i se
p r o t e c t i on for t he s i gna l s .
T h e fuses s hown on t he s c hema t i c a r e for f u t u r e use .
j umpe r e d p h y s i c a l l y i n t he boa r d .
NOT E S
P r e s e n t l y , t he y a r e
9-3