Atari 800 Field Service Manual

3Q0
COLOR
BAR
TROUBL£SHOOTING
(cont:
Is there
signal
at both
ends of LZQ2
Refer Figure
-
YES
Are
the following
present
Refer
Figure
+5
on Modulator,
Pin
S
Signal
on
Modulator,
Pins
2 and
4
YES
Does
screen look
like
Figure
3-4
NO
NO
Trace
circuit
back to
previous
step
NO
Trace
circuit
back to
previous
step
Verify
Power
Supply
volUge
at
Pin 19
of
JUS
Y^5_
Go to
TIA.
Page
7-13
CaU ATARI
Te^h Line
Specialist
Inside
California
(800) 672-1466
Outside
California
(800) 538-1535
(300) 538-1536
ATARI
Home
Computer
7-12

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