Atari 800 Field Service Manual

800
GR£Y
3AR
TROUBLESHOOTING
(cont)
Is tharv
signal
at botli
ends of
LZOZ
Refer
Figure
YES
Are the
following
present
Refer
Fig\2rs
+5
on McKlulator,
Pin
5
Signal
on Modulator,
Wns
2 and 4
YES
Does
screen look
like Figure
3-^.
NO
NO
Trace
circuit
baqk to
previous
step
NO
Trace circuit
back
to
previous
st^
Verify
Power
Supply
voltage
at Pin
19
of J115
J3S.
Go
to
ANY
VIDEO.
Pane
7-18
Call
ATARI Tech
Une
Specialist
Inside
California
(300)
672-1466
Outside
California
(800) 538-1535
(800) 538-1536
ATARI
Home
Computer
7-17

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