Tandy 1400LT Service Manual page 118

Replace t h e
LCD U n i t
Check power s u p p l y v o l t a g e s :
-
LCD
u n i t
e p a i r e d
LCD U n i t f a i l u r
NO
I
Check
P i n 3 , 5 , 7 , 9 , o f IC32
Pin47, 50-52 of IC30.
Check
P i n l 2 , 1 4 , 1 6 , 18, of IC32
,
Pin69-72 of IC30.
I
~
Check t h a t t h e
c o n n e c t o r i s
p r o p e r l y c o n n e c t e d
Check t h a t t h e
LCD
d r i v e waveform
i s normal?
IChange L;CD Unit.1
5-9