Tandy 1400LT - Page 138

1
MOTOR ENA (5. 25) signal
level measured
at Pin60
of GATE5
must be High.
DRIV SELO (5. 25) signal
level measured at Pin62
of
GATE5 must be High.
I
I FDD unit rep1acement.l
I
I
C95, C96, C97
R71-R73
Check the constant
of IC57.
are not
proper.
Check for a Low
Pulse at Pin4 of
pPD72065 (IC54)
(CS765 signal)
5-29