Atari 2600 Field Service Manual

*Caution:
Observe
polarity of
continuity
checker.
Do
=put +
probe on ground.
Snowy Screen Troubleshooting Procedure,
Motherboard, (Continued)
I
Is there
W
Is there an
continuity open trace on
between
+5V either +5v
line and ground?* or ground?
I
I Yes
No 1
Check for and
repair any shorted
traces or solder
bridges.
& h
b
No
'
Yes
Is there Replace connector. , I Is modulation
continuity evident on
across J201
i the screen?
Pins 1,3,6,
10,l l?
Is modulation
the TV screen?
Pg. 4-2
Check for and
rtplace shorted . I
caps: ~204,~01,~220,
C239,C200,CZl'l. I
Is modulation
evident on
the screen?
Pg. 4-1 1
Yes
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