Atari 2600 Field Service Manual page 118

2600A Audio Test Procedure (Continued)
Are the two
patterns in
Figure 4-9
alternating on
the screen?
I
Yes
Do
t h e panems
alternate wirt.1
the tones?
I
Yes
I
Are
bath colors
and tones
con-
I
J
Put switches
back to initialized
positions.
b
I
VCS
w i l l
go
through one last
cyde before changing
to
color bar
test.
b
Swapout
1 ) A201
Pg. 6-27
I
A t e
patterns
Pg.
4-45
sistent each
cyde?
2600/2600A Domestic VCS
I
Changed per
E C N #0021
1 /29/83
now correct?
(As in Figure 4-91
I
No
2) A200
3) A202