Atari 2600

Audio Troubleshooting Procedure,
.Motherboard
Switchboard
to isolate the bad board.
I BA mmcrbovd
pg. e 1 3
b J
J
Isrhuea2vp-p
i
square wave whrd
b one fre-
,.No
Is +5v at the top
NO Repair open trace
alternates betweal - quencY aPWarh5
of R2081
between 320 1 pin 1
two frequencies on at the pin? and R201.
Pin 13 of A201?
I
Yes
2600/2600A Domestic VCS
b there continuity
No
Rep%r open between
Swapout A20 I.
from R208 to A201 - R208 & A201
pin 131 Pin 13.
I
9
Replace
-
L
Is there now an alter-
_r _I
L
I I
Yes
Swapart
A20 I.
Pg. 4-24
.
L
Don square
Fix open trace line
wave siqnal appear betareen C210 and AD
at C210?
pin 12/13 or A201.
b
Pg. 4-24
k there a 4.5 MHz,
mduhtd 1 -2v p-p No
audio signal at C2 1 1
(either side)?
h
Pg. 4-29
Y er
1) all
21 RZ16
nating audio tone from
the N?
Pg. 4-2