Atari 2600 Field Service Manual

2600A Bad Video Troubleshooting (Loss of Sync.)
(Revisions 1-1 3)
R F module tuned to Can R F module be
61.25 MHz? (Channel 3) properly tuned? Replace R F module
a
I
3.5-5VP-Psignal Yesp
J
Rep lace
n
I
2600/2600A Domestic VCS
Yes
Defective R217 or
bad ,4201.
on A201 side of R217.
v'
a
Good video
Yes
I
Yes
1
Tune R F module
No
Defective
R22 1
I
I
b

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