Bally 5000 Plus, Manual

Page: 254 / 388

8 . R EEL OPT I C BOARD
I nt roduct i on
T h i s s e c t i on cove r s t he r ee l opt i c boa r d . T h e p a r t s and ob j e c t i ves o f t h i s
sec t i on a r e a s f o l l ows :
PARTS
Theory o f Ope r a t i on
Boa r d Assemb l y
C i r cu i t D e s c r i p t i on
T r oub l e shoot i ng
Boa r d S c h ema t i c
OBJ ECT I VE S
Know how t he r e e l o p t i c boa r d func t i ons
Loc a t e t he componen t s w i t h pa r t numb e r s
Know how t he c i r cu i t wo r k s
Know how t o t r oub l e s hoo t t he boa r d
Downs i ze d r e e l o p t i c s c h e m a t i c f o r r e f e r ence
code r l ng--One o f 2 p l a s t i c r i ng s mo l de d t oge t h e r a n d a t t a c h e d t o t he r ee l s .
T h e ou t e r r i ng e n a b l es so f t wa r e t o d e t e c t t h e cen t e r s ymbo l pos i t i on
on t he r e e l s t r i p when acce l e r a t i ng , r unn i ng con s t a n t , dece l e r a t i ng ,
a n d s t opped . T h e I nner r i ng e n a b l e s so f t wa r e t o d e t e c t t h e pos i t i on
va l ue o f t he r e e l when sp i nn i ng or s t opped .
ve l n--Th e p l a s t i c e x t en s i on s f r om t he code r i ng t h a t b l ock ( i n t e r r up t ) t he
em i t t e r f r om t he d e t e c t o r I n t h e U-shaped opt i c s e n sor s .
P r eques t l ons
Read t he fo l l ow i ng ques t i on s and w r i t e down any o t h e r que s t i on s .
1 . Wha t i s a U-shaped o p t i c senso r ?
2 . Wh a t b r ea k s t he t r ansm l t t l on o f t h e em i t t e r ?
3 . Wh i c h U-s h aped o p t i c s e n so r s d e t e c t t h e ce n t e r s ymbo l pos i t i on ?
Theory o f Oper a t i on
T h e r e a r e 5 r e e l se nsor boa r ds , one for e a c h r e e l s t e p p e r mo t o r . E a c h boa r d h a s
6 U-s h a p e d o p t i c sensor s . T h e opt i c sensor h a s a n em i t t e r ( E ) a n d a d e t e c t o r
( D ) . T h e code r i ng on t he r e e l ma k e s or b r e a k s t h e i n f r a r e d beam be i ng em i t t e d .
T h e s t a t e o f t he code r i ng e i t h e r t u r ns ON and O F F t he senso r s send i ng l og i c
s i gna l s t h rough J 1 t o t he r ee l con t r o l boa r d .
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