Tektronix 576 - Page 74

M aintenance-Ty p e 576
4-
8
TA BLE 4-4
I np ut a nd Out p ut L i n es to
H o r izo ntal Deco d ers U 951 a n d U 953
TA BLE 4-5
I np uta n d O utp ut L ines to
V e r tical Deco d ers U 956 an d U 960
1 . If t h e in p uts to t h e deco d ers are i n co r rect, somet
h
i
n g
is w r ongwith one of the cam switc h es .
2 . If the in p uts to t he deco d ers a r e correct, but t h
e
ou t p uts are i nco r rect, t h e decod ers are malfun ctioning .
3 . If the outp uts of t he d ecod ers a r e co rr ect, somet h i ng
is
wrong with α fiber-optic an d lam p assembly ( p robably α
bu rne d outlam
p ) .
TA BLE 4-6
In pu t a n d Out p ut L i n es
toSte ps Deco d ers U 965 and 0970
TA BLE 4-7
In p uta nd Output Lines
To B eta Deco d ers U 974, 0975 a nd U 976
See t he section of t he Circuit Descri p tio n
on
rea dout for
furt he r information a
n
d an exam p le of t he op eratio n of the
rea d o u t system .
Ι np uts
Out
p
uts
P i n s on
J 950
Titles Sol d er P
oint on
R ea d
out
L
ogic
Ci
r
cuit B oar d
Title
( L am p )
F 2Χ ΑΗ 1,2,5,A, V
5 5Χ
ΑΙ 1
4 V O L TS A J
2
Η
O
FF
AK 2,5
J
.1 Χ A L 5
Κ 10 Χ AM V
8 1 σ 1 AN Α
9 1 σ Ζ AG 0 1
10 10
4
A F 02
6 1 σ $ AE Μ
AD μ
AC m, n
Ι np uts Out p uts
P i n s on
J 950
Title Sold er P oi n t on
R ea d out L ogic
Circ u it B oard
Title
( L am p )
14 2 Χ F 1,2,4,A, V
13 5 Χ G 1
12 A MP S Η 2
15 O FF Ι 2,5
17 .1 Χ J 5
16 102 L V
Τ 101 Κ Α
S NE G
ΕΧΡ
Α m, η
Β
μ
C m
D
02
0
1
Inputs Out p uts
P i n s on
J 950
Title Solder P oi n t on
R ea d out L ogic
Circuit B oar d
Title
( L am p
)
19
2 Χ V 1,2,5,A, V
18 5 Χ W 1
U V olts Χ 2
V
O
FF Υ 2,5
W 1
Χ Ζ 5
Υ 10 Χ AA V
20
10 - 1 AB Α
21 10 -2 U 01
22 10 -4 Τ 02
Χ 10 - 3 S
m
R μ
0 m, η
Ι
np uts Out p uts
Sol d er P oints on
R ea dout L ogic
Circuit B oard
Titles
( L am p s)
Solder P oints on
R ea d out L ogic
Ci r cuit B oard
Titles
( L am p s)
R
μ
(vert) A W Κ
S
m
(vert) AX Κ , Μ
Collector Q960) η (vert) AY m
AE m (ste p s) AZ Κ , μ
Collector Q974 η (ste p s)
BA
μ
AD
μ (ste p
s) B D 5 2
AG 0 1 (ste
p s)
BE - DEC PT
AF 0 2 (ste
p s) BF
0,5
2
U 0 1 (vert) BG 0 1
Τ 0 2 (ve r t) ΒΗ 0 2
Χ 2 (vert) AQ 4,5
Ζ 5 (vert) A V 1,2,4
A L 5 (ste p s) AS 2
A J 2,5 (ste p s) AT 2,4,5
Collecto r Q984 BETA O FF A V 1,4,5
A R 2,5
BI 1,4