Atari 2600 Field Service Manual page 126

2600A Paddle Lines Test
4
7
I
Put snorting
?lugs in. Put
VCS into
Diagnostic
Mauix mode.
I
A
-
No
I
& there con-
tinuity between
Check trace lines and
resistors for opens
-
Repair
the 3202 or 3203
m
P
I
pin
(see
chart)
1
and the A20 l?
Check '2°2/3203 for
RC
waveform
(see
Fig. 4-10).
k
waveform present on
each of the pins shown
in chart?
on the failed line.
Dges RC waveform appear yes
on the appropriatt 3202
'
or 3203 Line? (See Chart)
4
Line
now
work?
.
I
Repair
A
-
Connection Chart
Repar open
trace between
Do paddle lines now Yes
I
A20 1 and 12021
work OK?
1203.
Pin Pin Pin Cap
Player A201 3202
203 No.
1
40
5
-
C215
2 3 9 9 - C216
3 38
-
5 CZ17
u
3 7
-
9 C218
1
No
I
Yes
-
~ o e s waveform appear a t
each of
the
~ 2 0 1 pi,,s
shown in the chart?
b