Atari 2600 Field Service Manual

Black or Solid Colored Screen Troubleshooting (Continued)
a
I
Is 4-5v p-p
d
. No
Open trace
d2 signal I between pin 26
present on.
A201 and pin 39
pin 26 A201? A202.
L b
Yes
Is there +5v and
No
ground on all of
Open on line
I I
AZOO, A201, A202, to +5 or ground. t
A203?
I
I
Reset and ready
lines good?
Open or shorted line.
t
Swapout
1) A200
2) A202
Does unit operate
Pg* 4-45
properly?
Repair
n
Pg. 4-2
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