Tandy 1400LT Service Manual page 126

Q
I
Check CTL6, C91,
and C92
(The frequency i s 16MHz)
I
MOTOR ENA(3. 5) s i g n a l
l e v e l measured a t
P i n 6 1 of GATE5 must
b e Low.
I L
1
DRIV SELO (3. 5 ) s i g n a
l e v e l measured a t
Pin63 o f GATE5 must
be low.
YES
1
I
Check GATE5
]
~ F D D u n i t replacement.
I
I
Check t h e c o n s t a n t C95, C96,
I
o f IC57.
,
I [ R ~ I - R ~ ~
C o n s t a n t s
a r e n o t
proper.
5-17