Atari 400 Field Service Manual

TABLE
OF
CONTENTS
(Cont)
Section
Title
Page
Overview
of Tests
3-2
Power
-Up
Test
3-2
Keyboard
Test
3-2
RAM
and ROM Test
3-2
SALT
n
Menu
3-5
Color
Bar
Test
3-6
Any Video
Test
3-7
Gray Bar Test
3-S
Keyboard Test
,
. . .
»
3-9
Switch Test
3-9
Tone
Test
3-9
Display
Options
3-10
Port
Test
3-10
Verify
ROM
Test
=
3-11
RAM
Test
3-12
M Test .
. .-•.
3-15
Star
Raider
Test
3-16
Shake
Test
3-16
Bumin
3-16
Description
of the Other
Functions
3-17
Production
Test
3-17
Boot
B
3-17
Examine
3-17
Adjust
3-17
Summary
3«1
7
if
DISASSEMBLY/ASSEMBLY
MAINTENANCE
i^-i
ATARI
*00
Home
Computer
Console
-
Disassembly
.»..,..
^1
Keyboard
and Power
Supply
Access
«
if-1
Keyboard
Removal
if-3
Power
Supply
Removal ti~4
CPU,
RAM
and
Motherboard Access
^6
CPU
and RAM
Removal
if-6
ATARI
800
Home
Computer
Console
-
Disassembly
^-S
Access
to RAM
Boards and
if-S
ROM
Board
Access
to Power
Supply
and
^9
Keyboard
Assembly
Remove Top
Cover
if-9
Remove
the PCB
Module
^-10
Remove
the Power
Supply
„ .
.
i^-i
1
Access
to CPU
Printed
Circuit
Board
if-1
2
Access
to Motherboard
^-13
Keyboard
Removal
i^-l
/f
ATARI
Home
Computer
iv

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)