Tandy 1000 SL Technical Reference Manual page 409

( c ) For o b s e r v a t i o n o f SKA t e s t p o i n t s :
Connect t h e probe ground t o t h e f o l l o w i n g t e r m i n a l .
i ) Conventional SKA:
GND
t e r m i n a l o f t h e SKA
ii) SKA3, PRE and DIF t e r m i n a l s : TPl (GND) of t h e
SKA3
O t h e r t e r m i n a l s : TP4
(GND)
o f t h e SKA3
Note: When you u s e t h e SKA, almost a l l t h e checks i n c l u d i n g t h e r e a d
amp. o u t p u t l e v e l a t TPs o f t h e F D D w i l l be done a u t o m a t i c a l l y
through t h e check c a b l e and F D D i n t e r f a c e c a b l e .
A l s o t h e s e s i g n a l s c a n be o b s e r v e d by a n o s c i l l o s c o p e u s i n g t h e
t e s t p o i n t s on a n
SI(A.
( 4 ) Head l o a d o f CSS model
For a CSS model ( w i t h o u t head l o a d s o l e n o i d ) , t h e F D D i s always i n
head l o a d c o n d i t i o n
as
f a r as a d i s k i s i n s e r t e d and t h e f r o n t l e v e r
i s
c l o s e d .
( 5 )
O r i e n t a t i o n o f t h e F D D
P o s i t i o n t h e F D D a s shown i n Fig.3211 u n l e s s o t h e r w i s e s p e c i f i e d .
H o r i z o n t a l s e t t i n g Vertical s e t t i n g
( F i g . 3211) General o r i e n t a t i o n of F D D d u r i n g maintenance
-
3233
-