Tandy 1400LT Service Manual page 116

A
Check P i n 3 0 4. 7 7 / 2 / 2 = 1 . 19MHz
o f GATE4
m
Check IC45:
A c t i v e d e l a y
l i n e
P i n 1
p i n 6
p i n 5
3 0 n s e c
3F
3 0 n s e c
Check I C 4 5 , a n d GATE2
40000H-9FFFFH
DCOOOH-FBFFFH
0-3FFFFH
Check IC40-IC42
a n d
e n t i r e
p e r i p h e r a l
c i r c u i t r y
I I
I
1
1
Check IC304-IC306
a n d
e n t i r e
p e r i p h e r a l
c i r c u i t r y
5-7