Atari 2600

2600A Audio Troubleshooting
k RF module tuned to
61.25 MHz?
(Channel 3)
Is there a 2v pp square
wave that alternates
between nvo frequencies
on pin 13 of A201?
Is there a 4.5 MHz,
Does quare wave S~JM~
appear at C208?
signal at C211 (either side)
N
Fix open trace line
betwtcn C208 and
Pin 12/13 of AZO1.
rn Pg. 6-2
1 i#
Yes
-
ye,
Is only one audio -
tone present?
Yes
Replace
1) ail
2) R207
Repair
Is there a defective A20 1
or open A201 pin 12 and
A201
pin 13?
J
I
Is there now an
alternating audio tone
from the TV?
2600/2600A Domestic VCS