Atari 400 Field Service Manual

400
POWE-?.-U?
CATASTROPHIC
FAILURES
AiVD
3A5IC OPERATIONS
GREEN
/YELLOW
dCREEN
Is
there
a defective
YES
Repair
RAM
card in the
Unit
(check
lowest
RAM slot arst)
YES
'S
NO
Swap-out
ROMs
F(A103),
E(A104),
and D(Aia5}
Is
a
clear
MEMO
PAD
on
the
screen
Go to
POWER-UP,
PART II.
Page
5-8
YES
NO
Swap-out the
following A303.
and Z303, and Z3a4
Is
a clear
MEMO PAD
on the
screen
-
Go
to POWER-UP,
PART
II. Page
5-8
NO
Go to
SOUD BLUE
SCREEN.
Page
5-7
ATARI
Home
Computer
5-6

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)