Atari 2600 Field Service Manual

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

Atari 2600 Specifications

General

Manufacturer	Atari, Inc.
Release Date	September 11, 1977
CPU	MOS Technology 6507
CPU Speed	1.19 MHz
RAM	128 bytes
Graphics	Television Interface Adaptor (TIA)
Media	ROM cartridge
Successor	Atari 5200
Colors	128
Sound	2 channels
ROM	4 KB
Controller Input	Joystick