Atari 2600 Field Service Manual page 46

2600 Diagnostic Flowchart (Continued)
i
Are color bars
P
Are color bars
2
Yes
present?
Yes
properly adjusted?
r
'See Figure 4-21.
(See Figure 4-2)
I
No
b
J
No
1
m
I
4
Is any other test
Check your
No
pattern on t h e
,Yes
switch settings.
screen?
I
J
Are they correct?
w
(See Figure 4-4,
4-694-9)-
I
A
a
w
Pg. 4-7
Is there "snow" No
Is
ANY
on the s c r e w ?
modulation
(no modulation) ~ r e s e n t on screen? No
1
I
Check VCS
1
w
connections
t o
TV
and
Test VCS
with
known
-
good
battery eliminator.
Pg.
4-9
Pg.
4-1 1
I
IS "snow" on
screen gone?
Pg.
4-6
Yes
2600/2600A Domestic VCS