Atari 2600 Field Service Manual

2600A Bad Video Troubleshooting (Loss of Sync.)
(Revisions 14 and up)
Tune R F module.
I
b
T
b
3.5-5V P-P signal Yes Defective R217 or '
on A201 side of R217.
defective CR203.
or defective A20 1.
d
R F module tuned to No Can R F module be No
6 1.25 MHz, Channel 3 ;' ' properly tuned? Replace R F module.
I
Swapout
1) A201
2) A200
3) A202
-
Good video:
+
Yes
Defective
R221 or R23(
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