Atari 2600

Snowy Screen Troubleshooting Procedure,
Switchboard, (Continued)
I
Is +5v at the
output of the voltage
regulator
(A101, pin 3)?
I
Is unregulated
47.5-9v at voltage
regulator
input
(A101, Pin l)?
Check for
bad regulator
(AlOl) or open
between
ground
and A101.
I
-7.5-9v present
yes
RephCe SiOl.
-
on the 3101 side of
I Does"rh
2 have
continuity?
( Yes
I
Is JlOl pin 2
shorted to ground? l$l Replace 5 10 1.
Check that C103 or C106
have not shorted to
ground.
u
itre() Is there modulation?
0
Pg. 4-2
2600/2600A Domestic VCS