Maintenance Checks And Adjustments; Introduction; Is U A L I N S P E C T Io N; Equipment Required - Tandy 6000 Service Manual

INTRODUCTION

T h is s e c tio n is f o r th e use o f th e O E M R e p a ir
a n d S e rv ic e D e p a rtm e n ts .
m a in te n a n c e ch e cks a n d a d ju s tm e n ts used
d u r in g th e n o r m a l li f e o f th e d riv e . T h e p u r ­
pose o f th is s e c tio n is to o u tlin e th e steps
n e ce ss a ry to v e r if y th e o p e ra tio n o f th e d r iv e
d u r in g tro u b le s h o o tin g o r a f t e r r e p la c in g a
p a r t o r a s se m b ly.
I f a f a u l t is susp e cte d w it h a d r iv e , fo llo w in g
th e ch e cks a n d a d ju s tm e n ts in th e o rd e r p r e ­
s e n te d w i l l h e lp to is o la te th e p ro b le m a re a .
T h e n , one m a y r e fe r to th e p ro p e r s e c tio n o f
th e tro u b le s h o o tin g g u id e .
s p e c ific c h e c k a n d a d ju s tm e n t is r e q u ire d , th e
p re c e d in g checks do n o t n e c e s s a rily n ee d to be
c o n d u c te d .
T h e v a lu e s a n d to le ra n c e s s ta te d in th e ch e cks
a n d a d ju s tm e n ts a re ty p ic a l v a lu e s f o r w o r k ­
in g d riv e s . I f th e v a lu e s m e a s u re d a re w it h in
to le ra n c e o r close to th e lim it s , th e su sp e cte d
f a u l t is n o r m a lly caused
p ro b le m . C o m p le tin g o th e r ch e cks a n d a d ju s t ­
m e n ts m a y d isclo se th e a c tu a l p ro b le m .
R e fe r to th e s c h e m a tic s a n d a s s e m b ly d r a w ­
in g s i n th e a p p e n dices, a n d th e th e o r y o f o p e r­
a tio n in S e c tio n 4 f o r c ir c u it d e s c rip tio n s . T e s t
p o in t lo c a tio n s a re c o n ta in e d in F ig u r e 5-1.
5.1 VISUAL INSPECTION
B e fo re a p p ly in g p o w e r to th e d riv e , o r d o in g
a n y c h e ck s o r a d ju s tm e n ts , v is u a lly in s p e c t
th e d r iv e :
1. C h e c k f o r loose o r m is s in g h a rd w a re .
2. E n s u re th e f r o n t
closes. T h e h e a d a rm ra is e s w h e n th e
d o o r is opened.
SECTION 5
MAINTENANCE CHECKS
AND ADJUSTMENTS
I t c o n ta in s th e
H o w e v e r, i f a
b y som e o th e r
le v e r opens a n d
3. E n s u re th e f r o n t p a n e l is secure.
4. M a n u a lly r o ta te th e d r iv e m o to r. I t
s h o u ld r o ta te fr e e ly .
5. E n s u re th e c ir c u it b oa rds a re secure.
6. E n s u re th e
sea ted , a n d in s ta lle d c o rre c tly .
7. C h e c k f o r d a m a g e d o r m is s in g co m p o ­
n e n ts on th e c ir c u it boards.
8. E n s u re a d is k e tte c a n be in s e rte d a n d
re m o v e d e a s ily .
5.2

EQUIPMENT REQUIRED

T h e f o llo w in g
ch e cks a n d a d ju s tm e n ts .
1. A d u a l-c h a n n e l, w id e b a n d o scilloscope ,
H e w le t t
e q u iv a le n t.
2. A n e x e rc is e r,
e q u iv a le n t, o r a s o ftw a re r o u tin e c a p a ­
b le o f s te p p in g th e d riv e to a n y tr a c k ,
s e le c tin g th e u p p e r o r lo w e r head, a n d
w r it i n g a I F , a ll zeros in F M , o r 2F , a ll
ones i n F M , p a tte r n ,
3. A p o w e r s u p p ly .
4. A c e r tifie d a lig n m e n t d is k e tte , D y s a n
M o d e l 3 6 0 /2 A o r e q u iv a le n t.
5. A c e r tifie d o u tp u t d is k e tte , n o n w r it e
p r o t e c t e d ,
3 7 4 0 /2 D w it h ta b o r e q u iv a le n t.
6. A c e r t if i e d
p r o t e c t e d ,
3 7 4 0 /2 D o r e q u iv a le n t.
5-1
c o n n e c to rs a re f i r m l y
e q u ip m e n t is r e q u ir e d
P a c k a r d M o d e l 1 7 4 0 A
A V A M o d e l 103C
D y s a n M o d e l N u m b e r
o u t p u t d is k e tte ,
D y s a n M o d e l N u m b e r
fo r
o r
o r
w r it e