Atari 2600 Field Service Manual

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

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