Atari 2600 Field Service Manual page 47

Bad Video Troubleshooting
procedure
KO
Bad switchboard
identify bad.
I
DotJ A203 have
No
Repair open
trace.
Yes
p o d
V a (+Sv at
-
Das
unit
now have
'
pin 8) and ground
a picture?
(at pin 1
I?
' b
I
k a
b 5 v
pg
signal p m c n t
R c p k e A203.
a t pin S of A203?
pattern an the
N?
Cheek
R221, I s it
Replace RZ21
I
OK?
(33K)
b
I
Yes
Chcck that
the trace line
from A201 pin
2
is
not droned
1
toanother Line.
1 s a p i c w e
now
pmmt
on
0
Pg.
f6-4
Pg.
4-2
I
r
Yes
Yes
2600/2600A
Domestic
V C S
Is a
picture
No
now present on
-
the TV?
No
-
Swapout
1) A200
2) A202
b a picture
now
present
on
the N?
h
-