Spectravideo SVI 318 Service – Technical Manual page 19

SA200 MAINTENANCE EQUIPMENT
A l i g nme n t D i s k e t t e
T he SA12 4 a l i gnme n t d i s k et t e i s u s e d for alignment of the SA200 .
a d j u s t me n t s and ch e c k s c an be ma d e u s ing the SA12 4 .
a . R e a d/Wri t e h e a d ra d i a l adju s tme n t us ing trac k
b . I nd ex Pho to d e t e c t or a l i gnme n t u s ing
c . Tra ck 00 i s re cor d e d w i t h a 12 5 kHz signal ( 2 F ) .
d e s i gna t e i f t he h e a d i s pos i t i one d over track 0 0 w h e n t he t r a c k 00
i n d i c a t ion i s t r u e.
d. Tra ck 34 ha s a
i s pos i t ione d ov er t r a c k 3 4 .
Ca u t i on shou l d b e exerc i s e d no t to d e s troy pre-recorded a l i gnme n t t ra c k s.
T h e s e t r ack s a re: 00, 0
a l w a y s be i n s t a l l e d on t h e SA12 4 t o p re ve n t acc i d ent a l wri t i ng on t h e d i s k e t t e.
Exerc i s er
T he exerc i s er u s e d on t h e SA2 00 con s i s t s of
c ab l e s e t . Th i s exerc i s e PCB c a n b e u s e d in a s t and a l one mod e , bu i l t i n to a
t e s t s t a t i on , or u s e d i n a t e s t er for f i e ld service.
T he exerc i s e r e nab l e s t he u s er to per form all a d j u s t m e n t s and c h e c k s r e q u i re d
on t h e SA2 00 d r i ve.
wr i t e a 2 F 125 k H z s i g n a l wh i c h i s t he r e c ord i ng fre q u e n c y u s e d f o r amp l i t ude
c he cks on th e SA200 .
and e n a b l e s rea d i n t he S A 2 00 to a l low c h e c k ing o f proper read back s ig n a l s.
DIAGNOSTIC
I n t roduc t i on
In correc t op era t i ng proce d u re s , f a u l t y programm i n g , d ama g e d d i s k e t t e s, "sof t
e r rors" cre a t e d by a irborne con t am i n an t s , and o t her ext erna l c a u s e s can produce
error s fa l s e l y a t t r i b u t e d to drive f a i l ure or m i s a dju s tme n t .
i n s p e c t i on o f the d r i ve d i s c l os e s a n obv ious m i s a l i g nme n t o r b rok e n p art,
a t t e m p t to re pea t t h e f au l t w i t h t h e or i g i na l d i s ke t t e , t h e n a t t emp t t o
d u p l i c a t e t he f a u lt o n a s e c on d d i s ke t te.
k H z signa l ( 2 F ) re corded, and s p e c i f i e s i f t h e h e a d
125
I t i s also u sed for r e f erence p urpo s e s .
1 , 15, 1 6, 17
I t ha s no i n t el l i g e n t d a t a hand l i ng c a p a b i l i t ie s b u t c a n
The exe rc i s e r c a n also s t ar t and s top t h e d r iv e moto r ,
16.
track
0 1 .
and 3 4 . T he wr i t e p ro t e c t t ab s hou l d
an
809 exe rc i s er w i t h a spe c i a l
3.4
The f o l l ow ing
Th i s t r a c k i s u s e d t o
Un l e s s v i s u a l