Atari 2600

Snowy Screen Troubleshooting Procedure
a
Is there dv
9
No
on
J201
pin 12?
Yes
I
I
Swapout A201. I w Is there A . Yes
modulation?
m 4
1
h
Is there +5v Is there
NO an open Line
on pin 20 of
I
AZOI?
between pin
20 and +5v?
1
J
I
I
L there continuity No
across 5201 pin 12?
Replace J20
1
r
Yes
L
I
I
Repair.
( No 1 No
Yes
2600/2600A Domestic VCS
Yes
Replace
J
Is J20l pin 12
shorted to
ground?
(check
continuity) '
&
Swapout A20 1.
I
Swapout
1) A200
2) A202
Is there
modulation?
I
I
s
yes J
Are C221 or
R223 shorted
to ground?
Repair
No
I
I
J
Check for
solder bridges
or trace
shorts.
c h
L
b
I I
I
t
J