Atari 800 Field Service Manual

400 POWER-UP
CATASTROPHIC
FAILURES
AND BASIC
OPSaATIONS
3LACK/GREY
SCREEN
{ cont
)
On the Mother-
board
Swap-out A103. Alll
2103
-
ZX05.
QIQ3,
Q104. and XlOl
Is
a
clear MEMO
PAD
on
the screen
NO
Check and
replace
discrete components
In video
summing
circuitry
Is a clear MEMO PAD
on the screen
YES
Go to POWER-UP,
PART
II, Page
5-8
YES
Go to
POWER-UP,
PART
II.
Page
S-a
NO
Go
to
GREEN/YE14.0W
SCREEN. Page 5-6
!
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Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS