Tandy 1000 SL Technical Reference Manual page 505

3-5-7. Replacement of
PCBA
M F D Control
( A )
Tools
(1) Cross p o i n t screwdriver, M 3
(2) Common
screwdriver,
small size
( 3 ) SKA or u s e r ' s system
(41 Required equipment f o r each r e f e r r i n g item
(B) Replacement procedure
(1) DiscoMect a l l of t h e connectors connected t o t h e P C B A M F D c o n t r o l
(Fig.405, No.29) r e f e r r i n g t o item 3-2-2.
( 2 )
Remove t h e
PCBA
W D c o n t r o l by removing t h r e e f i x i n g s c r e w s (Fig.405,
S 3 ) .
( 3 ) I n s t a l l a new P C B A i n t h e r e v e r s e o r d e r .
(4) S e t t h e s t r a p s and terminator a s they were on t h e o l d PCBA.
(5). Check t h e f i l e p r o t e c t sensor according t o i t e m 3-4-5.
(6) Check t h e e r a s e g a t e delay according to i t e m 3-4-7.
( 7 ) Check
(or
a d j u s t ) t h e asymmetry according t o
i t e m
3-4-9.
(81 Check t h e read l e v e l according
t o i t e m
3-4-10.
( 9 )
Check t h e r e s o l u t i o n according
to i t e m
34-11.
(10) Adjust t h e t r a c k 00 sensor p o s i t i o n according t o
i t e m
3-4-li.
(11) Check t h e index burst timing according t o i t e m 3-4-15.
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