Tandy 1000 SL Technical Reference Manual page 431

3-4-5. Check o f F i l e P r o t e c t Sensor
( A )
Equipment
(1) MAX media j i g C
(2) SKA
or u s e r ' s
system
(B-1) Check procedure (General method)
(1) Place t h e F D D on t h e work bench w i t h t h e LED i n d i c a t o r up and t h e
f r o n t l e v e r down. (See Fig.3411).
( 2 ) Connect an o s c i l l o s c o p e (DC range, 2V/div) t o t h e WRITE PROTECT
i n t e r f a c e l i n e .
( 3 )
I n s e r t
t h e MAX media j i g C from open s i d e and
s e t it so
t h a t t h e
notch
A
a r e a i s l o c a t e d on t h e l i g h t p a s s from t h e f i l e p r o t e c t
sensor
LED.
See Fig.3411.
(4) Adjust t h e o r i e n t a t i o n o f t h e F D D so t h a t it
i s
n o t exposed with
s t r o n g l i g h t .
(5) Confirm t h a t t h e WRITE PROTECT s i g n a l goes t o LOW
level
when power
i s
s u p p l i e d and t h e F D D i s DRIVE SELECTed.
( 6 ) P u l l o u t t h e j i g a l i t t l e so t h a t t h e notch
B a r e a
i s l o c a t e d on t h e
l i g h t p a s s .
(7)
Confirm t h a t t h e WRITE PROTECT s i g n a l goes t o H I G H l e v e l .
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3419
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