Sage II Service Manual page 29

1 . .
2 .
3 .
S A G E r I S E R V I C E M A N U A L [ 1 . 0 ]
INTERI"TITTANCE
CIIECKLIST
X INTERIITITTATVCE CHECKLIST :
I f t h e s y s t e m l s l n t e r m i t t e n t r p € r f o r n
t h l s c h e c k l l s t ,
t h e n r e - t e e t
w l t h
CY CLE R:
RAMS are suspect in
intermlttent
fallures.
If RAI,IDISK ls
belng
u s e d , t r y o p e r a t i n g w l t h o u t i t .
I f n o p r o b l e n o c c u r s , l s o l a t e
t h e
bad RAt'{ by swapplng one by one wi th a good RAM.
Check all cables and connectors.
Ttre cables should not have been
p i n c h e d .
P o s t s f o r c a b l e c o n n e c t o r s l n t h e p c b o a r d s s h o u l d s t a n d
s o 1 l d a n d n o t w t g g l e w h e n t o u c h e d .
I n s p e c t f o r c h l p s t h a t
a r e n o t s e a t e d c o m p l e t e l y l n t o
t h e s o c k e t .
Press down flrrnly
on all chlps to Lnsure that
they are naklng good
c o n n e e t l o n w l t h t h e s o c k e t .
I n s p e c t t h e p i n s o f a l l
t h e c h l p s t o
s e e l f
a n y a r e c u r l e d
u n d e r t h e c h t p
l n s t e a d o f g o i n g l n t o
t h e
s o c k e t .
I o o k f o r f o r e i g n
m a t t e r
J a u r m e d l n w l t h t h e p l n
o f a
s o c k e t .
A r e t h e c a P a c l t o r s
t h e r t g h t
v a l u e s ?
C h e c k t h e l r v o l t a g e r a t l n g .
U n d e r r a t e d c a p a c l t o r e
( 0 9 u f 6 v ) a c r o s s t h e L z V p o w e r s u p p l l e s m a y
have rrcrked for
some tlne
before the caps flnally
degraded enough
t o c a u s e p r o b l e m s .
E v e n l f
t h e v o l t a g e s l o o k o k ,
a r . . , . o f t h e s e
c a p s M U S T b e r e p l a c e d
w l t h
1 0 u f
2 5 V c a p s a s t h e y w 1 1 1 c a u s e
p r o b l e m s s o o n e r o r l a t e r .
5 .
C h e c k f o r t e m p e r a t u r e s e n s l t l v e
c h l p s . Use the TEMPEMTURE test.
C h e c k f o r l n p r o p e r
s o l d e r c o n n e c t l o n s .
I n s p e c t
t h e b o a r d f o r
g r a y l s h
s o l d e r a r e a s o n t h e p l n s .
A 1 1 f e e d - t h r o u g h h o l e s s h o u l d
b e f l l l e d .
" B e a d s " o f s o l d e r l n s t e a d o f a s m o o t h b a s e o n a p i n
a r e a l s o s u s p e c t .
T o u c h u p t h e b o a r d w l t h a s n a l l
s o l d e r t t p
a n d
r u n t h e C Y C L E R t e s t .
h .
6 .
2 0