800
XL"'
COMPUTER
ELD
SERVICE
MANUAL
FD1C07-40
REV.
01
FEBRUARY
1994
TABLE OP
CONTENTS
LIST OF
ILLUSTRATIONS
Fiftu-
g
Title
l-l SysTtm Block
Diagram
1-2
1-2 Functional Blod< Diagram
I-J
1-3
6502C CPU Pin AwignmcnU
1-3
1-4
ANTIC
Display
Processor
I-*
Pin Assignments
1-5 GTIA Pin Assignments
1-7
l-t POKEY Pin
Assignments
l->
1-7 PIA
Pin
Assignments
l-»
1-J
Power Supply Pin
Assignments
l-IO
1-9
SIO Connector Pin
Assignments
1-12
I'lO Controller 3ack Pin
Assignments
1-13
l-l
1 Cartridge Connector
Pin
Assignments
1-14
1-12
FBI Conne<:tor Pin
Assignments
1-15
SOOXL Computer Iv
Field Service Manual
imRODUcnoN
The
Atari
800XLTM
Computer
Field
Service Manual is a
relcrcnce juide for the
fefvicc
lechnician.
Tbf
Field
Service
Manual
is oreanized
into
six sections:
o
THEORY
OF
OPERATION
-
Overview of
how the MOXL
works and
what
its
basic
assemblies
look like*
O
TESTING
-
Review of Diagnostic tests
available for
diagnosing ROOXL
problems.
o
SYMPTOM
CHECKLIST
-
Failure information to
aid the technician
for a
rapid
dJagnosis
of
SOOXL problems.
O
ASSFMRLY/DISASSEMBLY
-
Assembly/Disassembly Insinictians.
O
SCHEMATICS
AND SILKSCREENS, AND
PARTS LIST
-
Electrical
drawings and
layouts
of the
800XL
Printer
Circuit Board and a list
of the parts used.
o
SERVICE BULLETINS
-
Section to be use^
for Field Change Orders,
Uppade
Bulletins and
Tech Tips,
SOOXL
Computer
Field Service
Manual
SECTION
1
THEORY
OF
OPERA
TJON
The
At*ri 800XL^*^
is an
cnhjinctd version
of
the rvistir^;^ ATARI Ccnpuler
Syitems, It
can he us^d
with
any of
thr
cKisting
Atari
prrtphrral devices u^rd with
Iht
#OO^M/6oaXLTM/8oO^M/i200XL"fW
Compui^^ri,
The
PCB contains 6^K of
RAM,
an of^crating systrrn
iVi^t
conTAins one J
ftK
X 8
ROM and an
on-board Atari BASIC programming Ufi^uagf l-C, The console
contains
the keyboard and four function
keys (inrluding
a
HFLP
Wry), plus
a
RESET
key,
a
single rartridge sbl,
connector
j*ck for
dais^'-chaining
frrip^'Tprflli and
connecting
hand coniroHers, a detachable (RF)
TV
inierface cable,
a
5 pin DIN
Monitor
Jack, nne status LED
(POWER),
and
a
parallel bits ir.lrrlace (PBD,
USE R
INTER FACE
The
Atari HOOXL
is a
genera] purjir^^e rnirrof
nrnpiMer ihat tjmi^s a
(^^07C
microprocessor. The 800XL coav>le
is
the
ceniraJ
pforrssing
unit for its f '•'ipr-ctive
system.
The right
side
panel contains
the
controller
jacks that accept the Atari X-Y
joysticks and paddle rontrollers.
The
rear
par>el
contains
the
serial
input/output
(SIC)
jack,
ttie
PBI, thr RF jack, the
monitor jackj the channel 2-3
switch, the
poy^r in jack, and the power switch
(On/Off).
The
console his
a 3/1
stroke,
56 key, alphanumeric keyboard,
that includes spcciaJ
characters and
controls,
space bar,
four
fimction
keys, HELP key,
and power
indicator. The
function and
HELP keys
ate
di^c^jssed below,
FUNCTION
KEYS
,
1
RE5ET -
Interrupts
and restarts the operating
system (OS) or cartridge. When
pressed
while
the
computer
is
ON,
this
key
enables the BASIC.
START
-
Starts
the game
or program,
SELECT
-
Selects
different program
or
game variations,
OPTION
-
Allows
the
player
to choose
variations
of a
program- If
the
OPTION
Key
is not
depressed
and held
at the time the
computer
is
tiirnrd ON, the built-in
BASIC
is automatically
enabled.
If
the
OPTION key Is depressed and held at
the
same tir^e the
computer
b
turned ON, the on board BASIC is
disabled and, vhen
there is no cartridge
or diskette in the system, the
Self-Test menu appears.
HELP
-
Retiirns
to main self-test menu from
individual Irst and
for future
software
development for
user "help"
functions- If you
are
familiar
with
12Q0KL
operation,
this key
does not
finctJon
the
same-
lOOXL Computer
I
-I
Fi«ld
Service Manual
MECHANICAL THEORY
Th* itOOXL
cornpuler
console Contains
«
single motherboard
which hoisei all
the
chips
of
the fystcrn ^rtd provides
corviectori for
interfacing eiftfrnaJ modules
to the
console.
It includes
the
CPU, RAM, OS and BASIC ROM's,
The motf.etroard
usrs
a
common adAess bus,
data
bus and clock Mnes* The
sirteen-line address bus
allows
the micjopf
ocessor to directly address t'lK
memoTY
locations.
The eight-line
data
bus
provides
the communication and data path between
the fif^ctianaJ modules.
The power is
provided
by an exlernal
power
supply
and rouied
throughout
the
console*
Th A1B/-I
Cat
tfldft
I
Ta
Jofiikk*.
PfttMicft,
etc
CarlrMl*
BASIC
f(OU
[
1
Cnntiolkr
Poru
OfiVf
lUnf
AOU»
Ta DU^
Pr]^t*f«,
CPU
CkculiTf
Clrctilu-yJ
PcDCEuInf
Orciiiry
1ahtic/;tia
CkodlTf}
J
SIO
ICpjr
board
with
huiMm
Video
ModuUu
TcWfUkm
SOOXL Computer
Field Service Manual
Fig l-I. System
Block Diagram
1-2
Thf
V-rylxrard conr>f-clt
lo the PC Board by a
?&-ronnf-cUir
ribhon cahlc-
TV\f Vf yboard
is
T>>^
ir^^r intrrfacc
with thr rompottr;
All j/cnph'rals connr-ci
tp
tSr ROOXL rith<rr
tt^ough
t^^c
SIO
<:oon4-cior en
th*
PBL
PoAffr ^nt^rs ttirough
the
7-Pin DIN conn^rtor on thf
rraf pan*rK
RF lo
The TV
s^wiic^hoJ' af^ivr4
Irom an
RCA phono connrctor and RF cable-
Coirifosi
le
Video
coTTif<;^jie lurninafvCj
and
aiidio lignah
to
thr rr>onHDf arrive
from
a ^
pjn
DIN
monilor jack on the rear panel.
Powrr On/Off
[5
conUolled by tJ.e
ON/OFF
switch
on
th^
rrar paneU
C
BOW
itlt
Trtt ti^bU AP*I BMIC C^\*t»»«
ConTToJ
ComroJUr
POT Control
ICcr^xi«rd Scan
Krj^romrS
Art*r«/C*n<TeJ L*n»i
4WK:
CPU
^jfto
Otn
IlLm^Is
S01IC
i
BA51C
ROM
UptDlAX
CirtulirT
Cku ti^p
V^i
UorJtor
Tcri T«JpTlsSan
Vidro
DRAhM
ON
R
5V
OX,
Figue
1-2,
FtfKtional
Block Diagram
SOOXL Computer
Field
Service Manual
1-3
ELECTRICAL
THEORY
DlCriAL MAPOa'ARE
TJir
digital h^/dwATp
contriti
ol;
O
Tt>r
6?0?C
CPU rnfrjO[>rori-^^of
Th^ AlphAH^jncric Television Inltrfarp
CootrolJrr (AMnC)
D
Thr Craphjc5 Tc!rvii;ion
hiirrf^irr Adapior
(GTIA)
O
The
POT
KF.Yt-iard Inlr^ratrd
CirruJT (PC^KEY)
O
The
Prrjptirral
InT^riAte AHapinr
(PIAJ
T}»r M^mtry (O.5. ROM,
fUK
PAM^ At^ri f^ASIC ROM,
Rev. B)
O
MiscrM^r^eoirs logic
MejTiory MHinHgrrj^rnt
Unit (MMU)
Driay Line
o Parallel
!\u^
rmrrfrice (PBl)
650?C
CPU
MrfToDforg^sor
The
6>02C CPU microproressor
f ont.^ins rrgHtcr 'I**g^, interronnf^ctioni,
arithmetic
logic, contrni
logic, and
^11
rerognizrd
operaTJon rodrs- The
characteristics of the microprocessor
inrlude:
O
RyTe-orientrd
strijctiire
o I
51 oprc><1es
o
Drcimal ar>d
binary arithrr^efic nindri
o
"irven
addressing
mcxies
O
Trvie indrijng
o Stark pointer
o
Two
interrupt
levels
o
6*K address
range
o
tntegraJ clock
circuit
O
Single +5 volt DC
power requirement
Figure
U5 Is an illustration
of the
6502C CPU Pin Assingments.
amXL Computer
Field Vrvke
Manual
Cf
ouryj
*n
RDY Input
MJT
Phjs*
1 OocV
h
Initirvjpr R«^uc5T
tS9
NC
Non
Mjsfcibic Input
^:=J
N.a
.)V POWER
^
Af^dfc-u
SuS
A#
Address Bus
Al
Acfdrco
Bus
AS
AddrriS
Bus
AJ
Addrcw Bus
A*
Addrru Bus
AS
AddrfU Bus
*4
AddrrtJ
Bus
Jtf
Address Bus
A<
Addrc^ Bus
A#
4
Addre^ Bus
All
Address Bus
AU
—
n
3
A£S Rr9«t
t9
3
H
P^aie ?
Clock
«
1
3
i»
Set
Overflow
«'
3
H«*
PT^A
%c Clock
*
,
3
*v»
R^ad
Wrnc
If
3
==^
'
HALT
Input
1*
3
N-O
3
m
Djiia
Bui
11
3
-
Catx But
FIED) »
3-
|^^V^
Data Bus
-
3
l«
DaU Bus
=»
3
»
DatA Bui
^
3
-
Data But
sy
3
Di
Data Bui
m
3
or
Data
Bui
a
3
JOS Address
Bui
»
3
«»
Address Bus
9
3
MS Address Bui
a
3
AO
Address
Bui
a
3
^
Ground
Figu-e 1-3-
6502C
CPU Pin
Assignments
Alphanumeric Television Interface
ControHer
(ANTIC)
The ANTIC Display Processor is a
cmtofn display
microprorr-wc
with an
instruction
set customized for grapliics
gcT>eration, It
also
has
the
ability to
control the
ADDRESS & DATA bus and RAM
Refresh-
Figure M
is an illustration of the
ANTIC
Display
Processor
pin
assignrrw-nts-
8 00 XL Computer
Field
Service Manual
1-5
CaoUNO
A[phar»um>
Pita.
Alphau^um*
Data
AlphA/ium, Data.
(SY5
R5T>
tnTcrrupt
Ojtput
HALT
Ad':irE^3
Sui
Addrp:^
Buj
Adctcra
3«j
ArfrtrcTi
5uJ
Re
id/^nta
RrAxiy
Ouiptit
Arfdrc^
Bia
Adrfrc^
Bm
Addr==3
Buj
Addr«3
Bui
Addrr^
BuJ
VSS
ANi
ANl
HAiTf
A3
A2
Al
Al
R/5
ROY
AlO
Al2
A13
Al*
Al5
D3
Hi
R:>r
FOO
C>0
D3
D2
Dl
ci
02
A*
AJ
A6
A7
AS
A9
All
VCC
CAta
5iu
C4ta Bijs
Cats
3us
?V^_^
Cl>dc
Cara
Btn
Cd-:a
Bus
^j^ 2
CL>ck
Add,—c3
?-a
Arfr^ir^
Adl
Addr-
Addr-
Adrir
Addr-
B-a
BuJ
Bin
Sua
FigiiTc
i-f*- ANIIC Dbpla)^
Proc^^or
Pin
Assignments
Graphic
Television
Interface
Adaptor (GTIA)
The
GTIA
Inlf-rfaces
with
the
ANTIC procri^^or on
one
side ^nd
with the
video
summation
rircuitry on the
other-
Its
primary
tasW
is
to
gmerate
color
and
luminance
signals
from the
bit stream it
receives
from the
ANTIC
Display
Processor,
It aiso
processes
(he Function
Weys,
provides t!ie
keyboard
"beep"
via
the TV
5peak<?r
and monitors
controller
Trigger lines.
Figure
1-5
U
an
illustration
of
the
GTTA pin
assignments.
SOOXL Computer
Fielrf
Service
Manual
1-6
Addrrss
Sua
Cfouod
C«i3i
Bus
0*:a Bus
Oata
Bus
Tf
iu»^
Triyo-
I
Tfijjef
2
TriRjcr
3
Opt>afi
St
Sfl _.
KtvboAfd
Click
?aC Color
CtfUy
Cfllor DeUy
AJphanum.
F^Atj
Alphmum,
Ctta
I
Afphftnum.
Dsoi 2
AI
1.
^ A2
Addicts 5^4J
A^
'
r
3» AJ
Arfd/TT-^a Na
V5S
I
'
JS A« Addrr^ 5ui
03
37 D* Cata 5u«
D2
3«
OJ D4U
Bus
01
33 oc Cara Bus
00
'
3* D7
Data
Bus
Tf
A
33 R/1 Rf fld/'^rita
n 31
c5
Gilp Srlwrt 1
n 10
CTTA 31
Lum
3
4
LuxTtinaoce
Line
T3 30
«>2
PSa-^ 2 Input
SjT 2»
FOO CTocJr Out
St 22 OSC 0%r-L^aiar
tnput
52 27 V-TC Pc-*i»*'
S3 26 HALf
HALT
PAL
23
C5YNC Output S/nC
CADJ .2* LUM
2 Luinina/x:* 2
Critpiit
ANQ
23 LUM
1 Lufninanco 1
Output
ANl
22 LUM J LajmLnanco
OxrTpirt
AN2
20 21 COL
Color
Figure N5. GTIA
Pin Auignmcnti
POT
KEYboard IntcRrated
Circuit (POKEY)
The POKEY
Is m custom Large Scale
Integrated circuit
(LSD chip. It ij
u^ed for
sudio generation.
Serial Input/Output
(SiO)
Data and CSocks, POT
ControJicr
Interface scan, and keyboard
scan.
Figure 1-4
Is an
itiustrallon
of the POKEY
pin assignments.
SOOXL
Computer
Field
Service Manual
1^7
Data Slii
Can
5aj
Tot Scnn
Pot Scnn
Pot Zam
Paz
fcaii
Pnr
5an
Pot Son
Keyboard
Response
J
V
F^»«-
KcYbcATd Sc3n
^^bcard
Scan
V5S
1
D3 2
3
03
«
Ot
s
07 t-
®Z
7
?6
X
P7 »
P* 10
P3
11
P2 12
P3 13
PO
14
PI
IJ
ica Ifi
vcc
17
KS
\Z
k5
I?
ia
20
«
D2
3?
01
3X
DO
J7
AUDIO
34
Afl
35
Al
3*
A2
33
A3
32
a/T
31
C31
30
csa
23
tItQ
2Z
500
27
ACLK
2fi
BCIX
23
krI
2\ 5TD
23 KO
22
in
21
kI
Au/1":0
Out
Addr—
3
Sdir^r^
Bin
Addrr^q_
Chip S^J
Giip
SrrJJ
CtJtpuT Din
S»=riaJ
CetpurCToci
K^rybaajd
Rcspon
ScriaJ
Input
Cat*
KcYteju-d
Sc-in
Kcytioird Scan
Kc-rbo*ni
Scan
Figurr
1-6*
POKEY pin assignments
Pgripheral InTerface Adaptor (PfAj
The PIA [S
a
general purpose Input/Ootput (!/0) chip.
It monitors
the X-Y
controller interfaces
and the 510 control line** In certain
apphcations it may
control the MMU logic
-
-
Figure
t-7 Is an
illustration
ol the PIA
a55ignments-
SOOXL
Compiricr
Field Service Manual
1-8
-
3
-
]
•
3
1-
3
1
1
^
1
-
1
:•
3
—
Ini^rx^t •4wHt
fOotptffJ
ViiHti^ Ptq^jWl
<nuip^
»
r>«'J
Lin*
07
Or-di 1-iput
*:
Clip Sf
i^'tt
V.put
'^
Oiip Seli'<rf
C^ue*
VipiJi
k/«
lUB<t/''riu
FigTjrc
t-7,
PIA Pin
As*>ignrnmti
MEMORY
(ROMS AND DRAMS)
O.S. ROM
The SOOXL
operating system
is
resident in one
I6K X 8
ROM, The
ROM address
inputs are
from CPU
address
lines AO through
A! 3- The chip
selects from
the
address
decoding circuitry and
generates data on CPU
data lines
DO through D7*
The
ROM
requires a
power
input ol
+5 volts.
BASIC ROM
The
Atari 800XL has built-in Atari
BASIC (Rev. B) residing
in an 8K X 8
ROM-
Thli
Is
equivalent
to having an
Atari BASIC cartridge
permanentJy
plugged into
the
console. Any cartridge plugged into the
computer,
takes precedence
over the
buUl-ln
BASIC
DRAMS
The SOOXL Dynamic Random Access
Memories
(DRAMS) consist of
eight
6*fK X 1
DRAMS.
MEMORY
MANAGEMENT UNIT (MMU)
The memory
management unit
(MMU)
address decoding
circuitry
consists
of
a
PLA
(Programmable Logic Array )
LC,
one
3 to
8 decoder
and a
few
gates-
The
input
to the
circuitry
Includes the ad*ess
lines
A8
through A13 as
well as
control
signals, such
as ROM enable (from
PIA) and
DRAM
refresh
from
ANTIC-
Some
of
the
most
imporUnt outputs of
this circuitry
include
select
signals for
the
GT1A»
POKEY, PIA,
OS ROM, DRAMS,
BASIC and
cartridge-
800XL Computer
Field Service
Manual
1-9
RF
MODULATOR
Thf RF
modulator
arcr^pts tV^f composite
v]dro from
thr video summation
cirojltry
arxJ the mono-aural audio signals
and produces a
modulated
signaJ suitable
fof
the
television*
Vith
a
73 Ohm
termination, the
modulated signal has
the followmg
character istics:
Maximum Voltage:
2MV
Minimum Voltage:
IMV
Audio Sound Carrier Frequency: ^.5 MHz
Fiequency Response;
Channel
2
-
Band: 6 MHz
Video Carrien
55,25 MHz
Audio Carrier:
59.75
MHz
Channel
3
-
Band:
6
MHz
Video Carrien 6L25 MHz
Audio Carrier: 63.75
MHz
MONITOR OUTPUT
The
5
pin DIN monitor
output jack (J2) accepts the
composite
video ar«l the
composite luminance signals
from the GTIA video
summation circuitry
and the
amplified mor>o-airaI audio
signals from
POKEY. 32
then
transfers these
signals
directly to the input
of the
video
monitor via
a
5 pin DIN
monitor cable.
L
The output signals have
the
following
characteristics:
Min. Voltage
Max.
Voltage
Composite
Video
750 MV P-P I
V P-P
Composite Luminance 1.2V
P-P
L5V P-P
Audio
600
Mv
P-P 750
Mv P-P
POWER SUPPLY
The power
simply
connector is
a
7-pin DIN
connector.
The Atari 800XL
has
an
erternal power supply
that accepts
110
VAC (nominal)
from the
power
lines and provides S
VDC
output
(/- 2%),
The maximum
rating
for
the supply
is
«
5
volts
and 1 .2 amps.
800XL Computer
l-IO
Field
Service
Manual
Fiiiir^
1-8
li aji lllutUation
of th*- power
supply
corinrrior pir
aitign*r>mti-
Ci^
P»»<*Ti ^-^_
J
—^
y »
--*-->— *3
^o<Q
Figure I -&-
Power ISupply Pin A^signrnf-nis
(LooWing Toward Computer)
SYSTEM
rNTERFACE
The 800XL
provides
the iollowing
interlaces:
o
Serial input/output {SIO)
o
Keyboard [nterfacc
O
Controller ilacks
o
Cartridge Intrrface
o
Parallel Bus
Interface
(PBD
SERIAL INPUT/OUTPUT
fSlO) INTERFACE
TVie Atari &OOXL communicates
with peripheral devices
via an asynchronom serial
port 09>2K
Baud rale
max,)-
Data is
transmittrd and
received
a^
eight bits ol
serial data. LSB
is
sent first
preceded by a logic
7^ro start bit and
%*icre^drd
by
a
lo(;ic one ^top bit- The serial data
out is
transruitted or
received as
positive logic
Jhc
serial data out line always
assumes its
new state when the serial
clock
out lir>c
goes high-
Ck>ck
out goes low
in the
center
ol
data out-
The bus
protocol specifies that all commands must
originate
from
tfie computer
and that peripherals present
data on the bus
only when
commanded
to do so-
Every
bus operation
goes
to completion before another biis
operation
in
initiated-
An
error
delected at any point
in
the bus operation aborts
iKc entire
sequence.
A btss
operation
consists of the
following
elements:
8D0XL
Computer
1-11
Field
Service
Manual
Co"uTi,*nd Frame
{rrom Co^r^pu\ef)
Cnrntnanid FrflTiie
1)
Data
Srod
2)
Oata
Rnrcivc
3) Irnmf^jflic
(N'o DaTa-CorrrrTiAnrl
Only,
t,^., ^TH*tl;s)
Acknowlf-dgr
Trarnc (Frarn Prr
ip^rral)
Opiiona! Data Frame (To Or From
Compulf^r)
CoFDpI^lc
Frame
(From
Ppriphrral)
Figure
1-9 iJiou'S
pin
assignments lor
the
SIO
i cnr-e^tor.
to J2
IL
13
1 -
Clock Injxrt
S- Motor Cor^trol
2.
Clock Output
9.
Proceed
3-
Data Input
10.
*5/Refldy
ft- Ground
I I, Audio Tnput
5-
Data
Output
12.
Not Connected
6. Ground
13, [nterrupt
?,
Command
Figure 1-9, SIC
Cwmrctor
Pin A^^i^nme-nts
KEYBOARD I
NTERFACE
The keyboard has
55
alphanumeric
key^ (iT>r.!ijding
^[»f-ciai ch^r^rter^ rind rontrois),
a
spacebar, which interface thru
U2* and U25
Keyboard Sense/Scan Decoders, four
(unction keys, and
a
RESET key-
800XL
Compurer
1-12
Field
Servire ManitaJ
C
6MTROILER
JACK
FNTERFACES
The JOOXL provides two
con&oJIcr jacV
inTerf^c^s* Both
are functior.ally and
electrically
idcnticaL The
controlW
jacks
aic 9-pjn D-type male connectors-
Figure
I
'to s^iows Uic
pin a^^ignrfkenis
for
the
?-pjn conrtectors-
1,
Ooystick
Forward
Input 6. Trigger
Input
2,
(Joystick) BacJf Input 7. +5 volts
3,
(Joystick) Leit Input S. Ground
^- (3oysTic30 Right
Input
9-
A
Potentiometer
Input
3-
B
Potentiometer,
Input
Figire I-IO-
Controller lack Pin
Assignments
CARTRIDGE
INTERFACE
The cartridge inlerface
connects cartridges to the
computer
with
a
30-pin.
connector.
The
Atari 800XL has Revision B
of Atari
BASIC built-in.
This is
equivalent
to
having
a
BASIC cartridge
"permanently" plugged
into the
coasole-
When
any
cartridge
is
plugged into
the computer, it takes
precedence
over the
built-in
BASIC This
is a fiffictjon of hardware. When no cartridge
is
plugged
in, the
hardware enables
the
built-in
BASIC
Figure
l-ll
Illustrates the pin
assignments oi the
cartridge
connector.
SOOXL Computer
1-13
Field Service Manual
u 1
5)D4
«
B
[IND
A2
A*
Al
AS
A0
A6
COW
5 OLE
BOTTOM
04
05
02
D]
D0
06
5S
8
10
12
H
L
11
H
*5V
13
ROS
14
XZtih
15
H
P
A7
A8
A9
A12
D3
D7
All
fllO
R/W
I
OP
Figure l-IK
Cartridge
ConncxiTor
Pin
A^si^nn.cnli
80OXL Computer
Field
Service
Manual
1-11
r
fPALt-fl BU
S
INTE
RTfCE
TKe pA'allr!
bu5 in»f'f?'C?
fPSn p-oviflri an ur>-bof
fr
r
rd,
dfrrcl
ronnrction to
tSe
ft'^H'r^i.
r^^ta and
rontro'
signals
*f»o\fc'n l»<^w.
\x
crmld
br u\f
d
lo
ini<T f
Ace
prT ipl'f r»fi,
par^^Mrl
bm
rfr
vit r j and cxicrnal applicmion*-
Fjpvjf
p
\-\7
Hfusir alr5 th^
pir^ ;i5^ignrn*-nt»
of Tf^-t parnll^l bus
intcrfjicc-
ParaJlrl Bio S^-'irif iraiion
(AOnRF55 OUTTUT)
(^nnnFS5 outputi
fADOnt^S OUTPLTD
tADHR^LSS OUTPLm
t^^^p^5
output)
(At:DRf55 OUTPUT)
(•.DDP^S^ OUTPUT)
(ADDRFS5 OUTPUT)
CTTOUND
DATA
BUDrRECTlONAL
DATA Br-DfRECTFONAL
D^TA
ri-niRECnONAL
DATA
Rl-0!R£CmONAL
CND
AG
^7
^%
A?
A?
An
A13
CND
DO
Dl
D*
GROUND CND
rH*^E
3 CLOCK-OUTPUT M7
N/C
RESERVED
rNTpRRurr R£que:5T
input
tnq
N/C Rr_5£RVEn
fifC
RESERVED
rrrniw AnnPT^:<^'^-ourruT
oy
Mf TM
PACK
Dr>Ani-£^iNrr^rr
Mrp-
ORonrJO CND
AjT-iiQ
fH
Aunro
I
3
J
7
It
15
13
17
21
a.
73
2
25
a
Si.
33
33
37
3^
M
*?
?
%
i
10
12
1 s
70
o
:»
»-
D
3*i
53
as
EXT5EL'
frxTFRNAL
SELECT)
A]
(APDRFS5
OUTPUT)
A3
tAnnRE55
OUTPUT)
A3 tADDRE5!S
OUTPUTI
CND
Al
(ADDRtSS
OUTPUTI
AlO
(ADDRESS
OUTTUTl
Al?
[ADDRESS
OUTPUT!
Aia
{ADHRESS OUTPUT)
Ai:?
(ADDRESS
OUTPUT)
Dl
rnATA-BI'DlRECTlONAL)
D3
fDATA^l-DinECTIONAL)
D5
(DATA-?^l^DfT?ECTTC»^Al_l
D7
(DATA45l-DrRECnoNAU
CND GROUND
CND
GROUND
RSr
RESET
OUTpiJT
RDY
READY
INPUT
EXTFNB
EXTf^R'JAL PF CODZ.P
C\TrL'T
prr
PEFRr^M-or'Trvn'
CND
CPntiND
RA^^
ROT
Af^nr'r_^'=
^TRTf^E
TTlT'M'n
LR/T' LAiTT^rp
PF\n/*R!rF-oT;Truf
Rr<;F.RVFn
N/n
(l.fXikif^p^
into th^ (
TT'^piiTrr 1
t-n
^FCTIOf^2
TESTING
OVLRvrw
This irCtlon flr^'-Titiri
tHc
pT
r^c
rrliirr^ Av,iil,iMp fpr IrMing
-inr^ tr oufJ-'J^^oTn*!;
iKe
«OOXU
Tltry
^t^t
o
Sflf Trsl
o
^(»ffSALT Dia^noilic
CArTriripr ar>c1 '^•Ji^rrSALT
Trst A^^r'^^^^)'
f
Q*
' HIM?
^T NEEOE
D
O
S50X!_ Co^npuirr
fon^olr
uiih
ftf f
r-Aii*
its
o
TV \r\, pro|rcr1>
;*r1)u^ird
o
Sof^rrSALT DiapriosUc Cartridgf
(rOlfi0335)
O
S.;f>rrSALT Tc?t A Vpf^rnbly (F
Al
00332)
O
S«|«rrSALT Tr<:hnica}
Uw-r's
M^ntiaJ (FniO0770l
SELF TE
ST FEAT
URES
Thf SflfTrit fr^Tirr aNow^ mTnirr,al
Irsttng of ihr fnllnu'in^
rornjviMf-n!s:
o
MrfTiory
-
RAM, ROM
and
ANTIC
o
Af»Hio/Visi,;0
-
ANTIC, GTIA, and POKEY
o
Kpyhoflrd
-
POKEY Jind ANTIC
NOTE:
Prmov^
any rartridg^
from the unit-
To
rfil'rf the tr^tmp
^^TJ^nr^,
prr^T
^Dd
f>oM "K* OPTION
l,r^ ^hilc
tf^- rrn^c^r
ri
lufnrd on-
The Sell
Tp5!
menu %crrf*n -J-iM
-ipr^ar.
Tn rxjt thr tr%t, pr-^S
th- SY^TFM RTSflT Ury; it--
J^<tc
R*-ady prompT -x-ill
NOTE: TT-T^lrtf^ tF»^ HELP
Wry
Tl-"^^
r»n
rffrf-t
m
any
^IticUJnn, rtrrpT
fr"-^iMr
fmirr wpfifi-
«ticwi
f«op-:\mi And
jr^
an
riEiT from irHfjTidn^) rr^t to rrnm 10
"^^^If
Pro<"f diit*^
7. T'f ft
nri TV r^-^,
1 '^
t
TTfTx
1
ri ;i[ -
ir
".
^, T*^ '
.Sf*!f
Fr-,!
' 1
'
*»
I
'*»
'i'l.M
;
f'lr
rpliin^:
o
A iv'io \'i^' I
>'
o
Kr'»
t^-'.-^r
d
O
AH r^-:
Pr«l the
SELECT Wcy
to
move
t>>e *c^l«rtion
indicator
ixilil
you
rrarh
t^ie d'-iirrd
test.
Prcii
the
START
key
to
h^pn tTw
T«t,
CAt/TION:
Sell
7m ^iJl f>ot jo
mlo tJit
AnrAf-l
Mcwit, Do not
Iravr
Vlf Tint
inmfl
on
for Any length of
lnT>e
(inaitniiwn vrvfm
rninutr^), iJricc
Kje^T* biff ning t^n ocrt*'*
OE5CRmiON OF
SRLF TFSTS
MEMORY TEST
Purpose!
To iwt the ROM, RAM, and
ANTIC
rhips-
Fof
mat:
Two long bars displayed at xUr top of thr
vreen r^
pr
'-^m:
the I
^K
Operating
System
ROM, B^low Ihem are
'J
8
bk^cV^,
r-Ach fcpr csenting
IK of RAM- The remaining J6K of
RAW
is
available
only
with rertain
software programs and is not U-Mrd at
this time.
When either
ROM
or
RAM
is
hring
tested, the corfesponding
bar
^egrnf^ni
( olor
is white. If
the ROM
or RAM tests good, the
har color ch.\ngrt
to light green, !f
the ROM
or
RAM
tests
defective, tf»e
rolor
changes to
red-
Once
a
ROM
or RAM has been tested and
found defective
the bar or
s|>ecific
block remains
red and
the memory is not
levied
again on subvrq'jent
lest passes.
The
MEMORY
TEST
continues testing until either tt>e
HELP or
RESET key is
pressed.
NOTEi
!(
RESET Is
used to exit
a test,
the OS will retun to K^<tc
not the Self
Teal-
You must
then press
and
hold OPTION and power up
the console
as
before,
AUniO VISUAL
TEST
Purp^sei
To
lest the ANTIC
and POKEY chips,
Formatt The screen displays
a
music staff ar>d treble clef-
A sequence of six
tones 90iJnd
and the corresponding note
shows
on the
staff. The tunc
plajrs sequentially
from channel
one throiigh channel foif,
TTie channel
number changes
for each according to
the soir»d channel
in
tne-
Voire
nimbers I-* under
the
staff and treble clef
indicate t*»e channel in iise,
TTiere
Is a slight
pause
between each
voice. A fault is
indicated by
a
note
appearing on the screen
witl«ut any soLnd and
vice
versa.
The AUDIO VISUAL
TEST
continues
testing until
either the
HELP
or
RESET
Wcy
is
pressed.
KEYBOARD TEST
Purpose: To test the
POKEY,
ANTIC and
ROM
chips
Format: A
full keyboard is (fisplayed
on the screen*
Press each
keyboard key and
tt^
corresponding
key
on the screen
changes
to
inverse videiD and
a
tone
somds. It should
change back
to t^»e
original
color w^^en the
key
is
800XL Computer
2-2
Field Service Manual
rclfascd* NOTE:
The
conlrol
and shifl
Wcy*
c^anf^^
only
wt-tn
prri*ed
at ihc iam«
time
as
another
key, T>>e dWplay
for
both
keys
will
char^ge
to
inverse
video
and tJ>cn
back.
A»
each
W^y
(cKCrpt
RESET, HEl,P
4
BREAK)
11 presied,
a
lone
h genrraled,
ALLJ^ESTS
All
of the Self Tc*l» are executed one alter
ar^oiher until
rither the
HF.LP or
RESET key
is
pressed.
NOTE: When ALL
TESTS
i^
exeruting, the MEMORY
TEST and
the
AUDfO
VLSUAL TEST
eicit
afier one
complf-te test cycle.
KEYBOARD
TEST
during
ALL TESTS
is
software cor>tfo!ir-d.
No operator
input fs required.
SUFERSALT
TESTING
For SuperSALT testing prof edires
rclef lo
SupcrSALT
Technical
U^^rr's
Manual
IP/N FDJ00770)-
800XL Computer
2-3
Field Service Manual
SECTION
J
SYMPTOM
CHECKLIST
The
Sympiom
Chrcklisi
ts d<^5ig^rd to
aid xhr
t#^hnirian
lo
arriving
at, lisied in iKe order
of
f^ilixe^
rapid dia|;no«is
ol problcmi. Each
symptom
is
accompanied by lomc po^^ihle cauies,
and SJiRgesled
remt^diei- Inatnictiona lor <rKna5irTr.b1
y/a^^^mbly,
are in
SECTION
of thi»
rn,tf«
SYMPTOM
POSSIBLE CAUSES
REMEDY
Sno*y
Screen
TV
Switch Box,
ON/OFF
switch,
Channel
Select
switch, RF Modulator
Adjust or rcptaccn
Defenivc Power
Supply,
Damaged
RF C-able
Replace
Defrctive
(open)
components
on JC
line-
Isolate
and replace
Defective (st*orted)
coTipor>ents IvDlaic and replace
on
*5A, B and/or
C
lini
Defective (shorted) LSfs
and/or ICs
Isolate
and
repair
Black/Crcy Screen YI,Q8,
9,
C109 TrDiiblc5hoot the clock
circuit and replace
defective component.
ftrd/B
rown
U2, 7-ZO,
21,
23,
26-30
U2-5,
U, 19,
28,
30
Isolate and replace
defective IC
Isolate
and replace
defective IC
BlL>e screen
Yellov screen
U2
U28
Replace
Replace
No Color or
Bad Color
RF Modulator or R3S Adjust or
replace
U17,
U20,
Ql,
Q3p
CR2, CR3 Troubleshoot color/video
circuitry-
Replace
de-
fective
IC/component,
Yl
Verify 3-579M5
MHz freq-
of
YL Replace if defective
SOOXL,
Computer
Field
Service
Maniial
3-1
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
SYMPTOM
POSSIBLE CAUSES
REMEDY
^
Voltage: PI.
P2 L2J.
35,
36
Iniiy-cl 35.
6
fcr
daiiaged pins;
leplacc
as
nr<:c5sary
Voltage: MC Q7,
LI I, U2
"^
Repair
Of replace
PIA Poru
V2\
C2S-29,
C82-92
Repair or
replace
LI
9-22
510
Port
L122. U23, C75.;8
Repair or
replace
Trigger
Lirws
UI7, t23,
L30,
C96, C97
Repair or
replace
POTLir^
U22,
LI 5-18,
C7l-7^
Repair or
replace
C63-66
Timers
U22
Replace
800XL
Computer
3-J
Field Service
Manual
SECTION*
A55rMBLY/OI5^SSEMflLy
Doaurmbly
Hardware
Acccs|
O
Tirn unll
up^iHr
do*rn.
O
Remove six srrrws from bottom
covcT-
o
Turn unit i/prighi,
D
Tip
cover
by
f aising the leiT 5ide
al*o\L'ing ;i<'rris
to
Tlie
Wryhoard
caSle.
Carefully
diiconnert
the Ueyhoard ground sirap arid remove thr
kryjioard rable
from
its
v>cke!
arKJ lay
top aiide.
•••
Due to
intninpatjbiljly
of pUwtic
ho*iiifig% <lo
not
Lntrrrtian|^ ttjp cr
Toitom J>o(i^iriK5
bctvecn units. Kc-ep the ttotKings which
hrlong to
earh init
viTh that mitp
PCBRerrroval
n
Remove t)ie foir remaining
screws holding the PC Board-
O
Llit up on the front of
the
PC Board white
pinhing out on
tJ*e right
sirir
of
the bottom
housing (player
port side) until the player ports
clear the
bottom
lioirjng*
Remove the PC Board.
Assembly
Reassemble in reverse order.
gOOXL Computer
|>-1
Field Service Marual
SECTION
5
>CH^»AAnCS AND
5ILKSCRf.ENS
AND
PARTS
LGT
The \cKcmaiic
*nd lilkscccn 'or the
800XL
atrr aitad*cd
To
l^c
front
cover of thii
m&nijaL
Remove them ancJ
p!ace
in this Motion.
NOTE:
The sdicmaiic
i) ft
domrttic/U-K-
veriioo.
A|!
U-K-
additioni
»re shown
in
dotted boxo. READ the
notes
at
The bottom
left comer
before any
troubles hoc ting
n
f»erlormed-
Thb Sf^tJon contains if*^ complete
Parts List
for the
ROOXL
BOOXL Cofnp».ier
Field
Scr-^ice
Mar,ual
''^
5*:CTK.W3
PARTS MST
tlCJI
rVvj
jp1
ion
Door,
CartTldgc
Bar, Door
Spring, Ddot
Keyboard
Power Supply
T,V,
Switei^Joi(F\Ed)
RF Cable
Pan Numlr<:r
CO2^t30-O0!
CA0li*7U6
CAOPii^riJ-CCt
Al
CI
C2,3pI0.
79
C^MI,
iO-92,96,
97J02,lt2
«,JU57,
93J0>109
C17.23,63^
C19.20,77
PCB A5;%cmbly
Cartridge CufCfre
Shield, Top
Shield, Bottom
Modulator, Domtstic
(UMU52)
Cap.
EJcc, Aifia]*70uF{10V)
Cap- E\cc. AxiaJ 72uF (1 6V}
Cap. Ceramic
Ami .OIuF (Z5V>
Cap, Ceramic
Awa! -OOIiiF
OOVO
^
Cap-
Ceramic AxiaJ JuF (2-5V)
Cap, C.'^ramic
Axhi
.Oi^7uF
{50\0
Cao NVHXsJari/^d
^. "uF
(3:^V1
Cao, Ei--:. Alinr^ IOij^(l€V)
C^p Ceramic Arc^al
6SpF
(X1V>
C0f-O:97
CA0e{619
COl'iJJO
C0E^393
C0It*IS[-02
C01*^131-G1
COl'^MJ'Oi
C0^Sftf7
C0l^37l
CDlfll79-!-
3-5
PARTS
LIST
Location
iption
Pan
Niiml^r
1
1
C43
4
Cap Ceramic Axial
220pF (JOV)
C*»
CapElec
Axial<i7uF(IOV)
C32.«
Cap
Ceramic A«ial
l00pF(50V)
GJ1
Cap Ceramic
Axial
3.9pF
CRI-»
Diode (
1 N4 1
1
S)
ai
Conn«:tor, Rt. Angle (1 3 pin)
]2
Conneclof,
Monitor
(5
pint
3*
Connecior,
CarTridRt (30 pin)
".t
Connector,
Rt.
Angle
(9
pin)
37
Connecior, DIN Power (7
pin)
'3»
Connecior, Keyboard Header
(21 Pm)
LI -J, 7
A
Inductor Ferrite
Brad
11.12
U,5
Inductor Axial 820uH
L6 Inductor, Axial
lOOuH
L 10,1
J-
30 Inductor, Axial lOuH
Lt4 Inductor,Axial 22uH
Ql-5
Transistor,
NPN(2N390tt)
Q7
Transistor, PNP (MP5A55)
QM
Transistor, PNP {2N3906)
R1»IU39
Rcjistor, l/HW
2.2K
R
2.7.
32
Rcs'stor, I/1W
?K
R3.3t
Resistor, l/dW
6.2K
R4,J9
Resistor,
l/IW 56K
R3
Resistor, l/HW K70K
M
Resistor, l/HW
6SK
Rt
Resistor, l/dW 5.1K
R9,C2 Resistor. 1/lW
3.3K
RI0,13.1«, Resistor,
lAW IK
37,* M3,
'60.&I
,tO,97
RI3;t3,l(
Resistor,
l/OW 3K
19-22,31-
3«,tt.7«,
73,I>4S,
IM
RL7,(S Resistor,
i/tV 2*0
Rll Resistor, I/4W IM
R33-30,6* Resistor,
l/HW lOK
a35
Resistor,
1/itW
33K
R3(
Resistor, 1/4T 680
R3S
Resistor
Variable
(Trimpoi)300K
C0I1U0-03
2D-I00676
C0111179-19
C06
1
336-01
C0fc0607
cot 2995
C0|i(388
CD1K3S9
GOlOtlS
C06J83S
C0fcl793
CDlt38*
C04
79|k8
-03
C0IK38I
COIISSO
3<i-2N390*
COlfSO?
CO
18991
!t-5222
11-5202
It-3622
I1-55t3
11-5683
ift-5512
11-5332
11-5102
11-5302
11-5211
11-5105
11-5103
11-5333
11-5681
1
9-4J
1
50*
lOOXL
Computer
Flcld Service Manual
5-1
PARTS
LIST
LiKAiIm
rV-tcr
ipl ion
R>|Q,33,6€
Rrsiitor
I/hH
100 Otim
90,109,112
1I7,1I9,I?8-
131
R«6
Resistor
l/ttW
1.6K
Rft7
Rcsinor
1^*
36K
Rti8 Resistor
W"*
18K
R«9
R«isiOf
I/HW
9.IK
R50,63,Sl-8«
RMistor Wu* <'.7K
92-9*
R3I
R-5isTor IhV 750
Ohm
R?ft Rrsi5ior
!/<•*
I.2K
R
3?. 36,
57
Resistor l/'i* 7) Ohm
R89
RrsiJtor If'V
ii7K
R76-79
Resistor
l/*iW
l.SK
R91
Rrsisior
lAW
7.7K
R9;.I10,1IS,
Resistor
1/ftW
220 Ohm
120-127,132
133
R9S-l05,i07, Resistor l/ftW 33 Ohm
lOS
Rill Resistor
1/lW
27 Ohm
RI13,I3»-137
Resistor
l/tV
U70Ohm
Rll« Resistor
1/KW
1.5K
R1I6 Resistor
1/tW
51 Ohm
RNl-4 Resistor
Network
SIP
«t70
Ohm
SI
Swilcft Vertical Power (SPOT)
S2
Switch Channel Select
Ul
IC Dual Op Amp (LM35S)
U2
IC Decoder {7<( LSI 3S)
U3
IC Mem Mnp Unit (MMul B)
IC(UK X 8) OS ROM
U*
U5
IC (SK X 8 ROM) Rev
B
U7
IC
ANTIC
US
IC CPU
(6502)
U9-i6
1C{6')K
X 1
DRAM)
UI7
ICCTIA
UIS
ICANDQuad(7iiLS08)
U19
IC
Hex Inverter (7*L5U)
U20
IC Hex
Buffer CMOS
(CDft050B)
P/irt
NwT.ber
H.-»01
lt-5162
ie-5363
Ii-5183
l'<-^912
1 ft
-5*
72
lf-5751
It(-5122
111-3750
l'»-5'»73
1(1-5182
lC-5272
l'i-3221
11-3330
l(t-5270
l*-5t71
11-5132
1<(-35I0
COS!
668-0*
0061022
C019702J51
C0fii;02
C06l't28
C06l6t8
C061598
C060302
C021697
COlftSOfi
C
0606 12
COlft805
CO 17097
CD6I850
C0I0816
800XL
Computer
Field
Service Manual
5-5
PARn
LOT
Location
DcxTipIion
U22
IC POKEY
U23
ICPIA
U2*.25
IC
MUX
(CD'fOJlB)
U2fe,27
IC
Multiplier
(7tiLS158>
U2S
ICLaich(7lL5375)
U29
ICOftay
Modnle
U30
IC
AND/OR Invfrlffr
(7IiI-55l>
Wl
Rc-iistor
1/1W
Ohm
XUl
SocUet 1C(8 pin)
XU
18. 19,30
Sockft
ICdd
pin)
XU2.9-I6,
Socket
IC(ttpin)
2Q.21-2J
XU3
Socket IC (20 pin)
XU4,3
Socket
lC{2<t
pin)
XU7,8,17,
Socket
ICCiO
pin)
22,23
Yl
CrystaJ
3.379W5
MHr
Part
NuTtber
CDI229*
C0I<»795
C0I1336
CO
I
ft
3*5
C060619
C060t(72
C060it7*
C0f0629
COl«38fe-OI
C014386-O2
C011386-O3
C0lii3W-05
CO
11 386-07
C0113S6-09
C06I090
800XL
Computer
Field Service Manual
>-6
Loading...