Atari 800XL Field Service Manual

SYMPTOM POSSrSLE
CAUSES
REMEDY
No
Power
light (LI)
No Griy
Rars
or
Missing
&«r
Vp^idt
rfown Alpha/
NuFTierici
on
Player
FieM
Pp^rr
LED, Power Supply,
Cabl«
UI7, U20
U7
Pfp%ir or WrpJwre-
Rcfviir or
neplftfen
Rfpfiwe-
Sonif
KeySoard
Keys
Fail* tj?2,
KcySoard, U?**,
U25,rablc
arjwrr of
Replare-
AIl KeyU^ard Kryi
Fail* IJ22,
?<, 25
Tone Of
Tones Miasing
During
Trme Test
U22,
*.3MHz,
Ul,
Ai^djo
Carrier Freqt>rncy,TV
voTume
Repair cr
Replace.
t*.^
NUli
on
RF
Mcxiulator,
Rf'pl^e i(
necessary.
Console Came Swhches
Will Not Fi^cton
UI7, Keyboard,Cable
Repair or
Replace
ROM Test Failed
RAM Test FalJed
Video
or
ANTIC
Stress Fall
U2-U?
U2, 3,9-16, 18,
19,
26-30
U7
Repair
or
Replace-
Verify ANTIC is
Rev E.
Rep^ or Replace-
F
Repair or
Replace-
CPU Teit
Fail
2-Tay Clock FalM*
ExtefT^al Audio*
•
CTIA Fall
YI,QS,
Q9,
US
Jl,
U22
3\,
Ul
U17
Verify
X5)»
MHz
osc-
frrqi.irTicy,
Repair or
Replace.
Prp^if iM Replace-
Rppair
or Replace.
Rcpl
*
Keyboard ^nd switch
require operator intervention.
• •
Requires
the
SuperSALT
Test Asi^mbly, jumper
cables,
power ^tipply
for
correct
operation.
Joystick
arid
Paddle Test require user
action
with
a
Joystick
and
paddle during
respective testing
iOOXL Comptiter
Field
Service
Manual
3-2

Atari 800XL Specifications

General

Manufacturer	Atari
Type	Home computer
Release year	1983
CPU	MOS Technology 6502C
RAM	64 KB
ROM	24 KB
Operating System	Atari OS
CPU Speed	1.79 MHz (NTSC) / 1.77 MHz (PAL)
Graphics	ANTIC and GTIA chips
Display resolution	160×192 to 320×192 pixels
Sound	POKEY chip
Storage	Cassette tape, floppy disk
Ports	Serial, parallel, monitor, joystick ports