Tandy 6000 HD, Service Manual

Page: 313 / 416

SECTION 6
TROUBLESHOOTING GUIDE
AND REPLACEMENT PROCEDURES
INTRODUCTION
T h is s e c tio n is d e s ig n e d to h e lp lo c a te a n d c o r­
r e c t fa ilu r e s r e la te d to th e d r iv e . T a b le 6-1 is a
tr o u b le s h o o tin g g u id e o u t lin in g th e p ro b le m ,
it s p o s s ib le cause, a n d th e re c o m m e n d e d
a c tio n . T h is s e c tio n a ls o c o n ta in s p a r ts r e m o v ­
a l a n d re p la c e m e n t p ro c e d u re s .
T h e re c o m m e n d e d s p a re p a r ts l i s t a n d a sse m ­
b ly d r a w in g s i n A p p e n d ix A a re u s e fu l w h e n
r e p la c in g a s s e m b lie s . I n a d d itio n , th e c h e c k s
a n d a d ju s tm e n t p ro c e d u re s i n S e c tio n 5 m u s t
be u se d to v e r if y p ro p e r in s t a lla t io n a n d
e n s u re th e d r iv e ’s p e rfo rm a n c e .
6.1 SYMPTOM DIAG NO STIC
TECHNIQUES
W h e n t r y i n g to d ia g n o s e a f a u l t a t t r ib u t e d to
d r iv e f a ilu r e , a v is u a l in s p e c tio n o f th e d r iv e
m a y r e v e a l a n o b v io u s m is a lig n m e n t o r
b r o k e n p a r t o n th e d r iv e . A lw a y s c h e c k th e
p o w e r s u p p ly v o lta g e s b e fo re p ro c e e d in g w i t h
th e tr o u b le s h o o tin g g u id e .
I n som e cases, e rro rs a t t r ib u t e d to th e d r iv e a c ­
t u a l l y m a y be caused b y in c o r r e c t o p e r a tin g
p ro c e d u re s , f a u l t y s y s te m p r o g r a m m in g , in c o r ­
r e c t d r iv e o p tio n p a tc h in g , a n d d a m a g e d o r i n ­
c o r r e c t c e r t if ie d d is k e tte s . R e v ie w S e c tio n 3 to
e n s u re c o rre c t c o n fig u r a tio n o f th e d r iv e .
6.2 SOFT ERRORS
S o f t e r r o r s c a n b e c a u s e d b y a ir b o r n e
c o n ta m in a n ts , ra n d o m e le c tr ic a l n o ise , exces­
s iv e te m p e r a tu r e , a n d o th e r e x te r n a l causes.
T o c o r r e c t s o ft e rro rs :
1. E n s u r e p r o p e r g r o u n d in g b e tw e e n
p o w e r s u p p ly , d r iv e , a n d h o s t s y s te m .
2. V e r i f y th e re is n o ra n d o m e le c tr ic a l
n o is e to th e d r iv e .
3. V e r i f y th e r e is n o r a d ia te d n o ise to th e
d r iv e .
4. E n s u re te m p e r a tu r e in th e v i c i n i t y o f
th e d r iv e is w i t h i n s p e c ific a tio n .
5. T r y to v e r if y a n d d u p lic a te th e f a u l t on
a second d is k e tte .
6. U s u a lly , q u a lit y m e d ia is s u f f ic ie n t to
c le a n th e he a d s. W h e n c o n ta m in a tio n
o f th e h e a d s is e x tre m e d u e to p o o r
q u a lit y m e d ia o r a ir b o r n e c o n ta m i­
n a n ts , c le a n in g d is k e tte s m a y be used
in a c c o rd a n c e w i t h th e m a n u f a c t u r e r ’s
in s tr u c tio n s .
CAUTION
Do not use cotton swabs, solvents,
or otherwise clean the heads by
hand since damage to the heads
may result
6.3 T R O U B L E S H O O T I N G
GUIDE
T h e tr o u b le s h o o tin g g u id e is p re s e n te d i n th e
fo r m o f a ta b le . T h e ta b le in c lu d e s :
1. A s t a t e m e n t r e p r e s e n t i n g t h e
c o n d itio n .
2. A l i s t o f p o s s ib le causes.
3. T h e re c o m m e n d e d a c tio n to be ta k e n .
N O T E
C h e c k th e p o w e r s u p p ly v o lta g e s
to e n s u re th e y a re w i t h i n spec­
i f i c a t i o n b e fo r e p r o c e e d in g
w i t h th e tr o u b le s h o o tin g g u id e .
6-1