Atari 2600 Field Service Manual

2600 Diagnostic Flowchart (Continued)
i
Are color bars
P
Are color bars
2
Yes
present? Yes properly adjusted? r
'See Figure 4-21.
(See Figure 4-2)
I No
b J
No 1
m
I
4
Is any other test
Check your
No
pattern on the
,Yes
switch settings.
screen?
I
J
Are they correct?
w
(See Figure 4-4,
4-694-9)-
I
A a w
Pg. 4-7
Is there "snow" No Is ANY
on the screw?
modulation
(no modulation) ~resent on screen? No
1
I Check VCS 1 w
connections
to
TV and
Test VCS with
known - good
battery eliminator.
Pg. 4-9
Pg. 4-1 1
I
IS "snow" on
screen gone?
Pg. 4-6
Yes
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