Atari 2600 Field Service Manual

2600A Snowy Screen Troubleshooting Procedure
4
pen between 3201 and in
7.5 unrequiated on 3201? put A203. Repair
b
I
? 1 J +
yo
1s -5v present on ourpur 1s there +jv on in b kr ~205 defective? -
of .\203? RF module!
b h
No
-5v horred ro qround? Repair
Swawut
1) ,4201
21 A200
3) A202
Yes
b
b
Replace RF module or , Repair
bad
RF cable?
RepLace L205.
No J
I D A
L
1 I
Jpen beween A203
ourput and RF moaule
pin 4.
Yes
.Anv modulation?
Defective 220 1.
A
i
I i
Replace
u
b
Pg. 6-2

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