Atari CX Quick start guide

ATARI
ADVANCED VIDEO ENTERTAINMENT SYSTEM
MODEL 5200TM
FIELD SERVICE MANUAL

A tari believes that the information described in this manual is accurate and reliable,
and much care has been taken in its preparation. However, no responsibility, financial
or otherwise, shall be accepted for any consequences arising out of the use of this
material. Information
contained herein is subject to change. Revisions may be issued .
to advise of such changes and/or additions.
Correspondence regarding this document should
be forwarded to Director of Technical
Support, Consumer Product Service, Atari, Incorporated,
845 W. Maude, Sunnyvale,
California
94086.

TABLE OF CONTENTS
Title
-
Page
Section
INTRODUCTION
THEORY
OF OPERATION
Overview
Model
5200 Console
Four-Port Universal
PCB differences
Two-Port Universal PCB differences
Outer Case
RF Shield
PC Board
Microprocessor Chip - MPU
Alphanumeric Television Interface
Controller (ANTIC)
Graphic Television Interface Adaptor (GTIA)
Pot Keyboard Integrated Circuit
(POKEY)
Switchbox
Game Controller
SILKSCREENS
AND SCHEMATICS
4-PORT
MODEL 5200 TESTING
Equipment Requirements
Testing with the Diagnostic
Cartridge (Version
1 .l)
Overview of Tests
Initialization
Power-up Screen
Solid
(Black) Colored Screen or
Vertically Lined Screen
Snowy Screen
Warped-Ragged Picture
Color
Bar Test
Gray
Bar Test
Any Video Screen
Pokey Adjust
Error
Summary
RAM Test
Verify
ROM
Port Test
Tone
Test
&
-
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TABLE OF CONTENTS (Continued)
Section
Title
-
2-PORT MODEL 5200 TESTING
Equipment Requirements
Testing with the Diagnostic Cartridge
(Version
1.1)
Overview of Tests
Initialization
Power-Up Screen
Solid Colored (Black) Screen or
Vertically Lined Screen
Snowy
Screen
Warped-Ragged Picture
Color Bar Te
Gray
Bar Test
Any Video Screen
Verify OS
ROM
Tone Test
POKEY (Port) Test
RAM Test
POKEY Adjust Test
POKEY Softfire Test
4-PORT
5200 DIAGNOSTIC FLOWCHART
Overview
The Swapout Procedure
Replace in Order
ATARI Repair Hotline
2-PORT
5200 DIAGNOSTIC FLOWCHART
S wapout Procedure
Replace In Order
ATA
RI Repair Hotline
4-PORT 5200 SYMPTOM CHECKLIST
2-PORT
5200 SYMPTOM CHECKLIST
GAME CONTROLLERS
Overview
Joystick
Key Pad
Fire Buttons
Select Buttons
CX5200 Field Service Manual

TABLE OF CONTENTS
LIST OF f LLUSTRATIONS
Figure
Table
-
3-1,
6-1
7-1
Title
-
Color Bars Screen
Gray Bar Screen
Any Video Screen
Pokey Adjust Test Screen
Error Summary
Color Bars Screen
Gray Bar Screen
Any Video Test Screen
RAM Test Screen
POKEY Adjust Test Screen
CX52 Game Controller
Joystick Positions
1 & 2
Cable Connector Pins (End View)
Pot
& Arm Assembly
Controller Top (Underside)
Select Switch Bezel Removal
Controller Knob Removal
Pot
.Arm Positions for
Assernbly
CX52 Game Controller Schematic
Top Cover Assein
bly
Bottom Cover Assembly
Trakball Block Diagram
Diagonal or Circular Motion
Cue Ball Support
Top Cover (Underside)
Main PC Board
LIST OF TABLES
Title
-
Diagnostic Error Codes
Game Controller Continuity Check
Keyboard Test Display
Page
Page
CX5200 Field Service Manual

INTRODUCTION
The Atari Advanced Video Entertainment System (Model 5200) Field Service Manual is a
reference guide for you, the service technician.
This Field Service Manual is organized in twelve sections:
a
THEORY OF OPERATION - Overview of how the Model 5200 works and what
its basic assemblies look like.
SILKSCREENS AND SCHEMATICS - Electrical drawings and layouts of all of
the Model 5200 printed circuit boards.
4-PORT 5200 TESTING - Review of Diagnostic Tests available for diagnosing
4-Port Model 5200 problems.
2-PORT 5200 TE!jTING - Review of Diagnostic Tests available for diagnosing
2-Port Model 5200 problems.
a
4-PORT 5200 DIAGNOSTIC FLOWCHART - Aids for troubleshooting the 4-
Port Model 5200.
2-PORT 5200 DIAGNOSTIC FLOWCHART - Aids for troubleshooting the 2-
Port Model 5200.
0 4-PORT 5200 SYMPTOM CHECKLIST - Failure information to assist the
experienced technician arrive at a rapid diagnosis of 4-Port Model 5200
problems.
a 2-PORT 5200 SYMPTOM CHECKLIST - Failure information to assist the
experienced technician arrive at a rapid diagnosis of 2-Port Model 5200
problems.
0 GAME CONTROLLERS - Overview of hand controller construction with
electrical schematics and recommended test and repair procedures.
TRAKBALL CONTROLLER - Overview of trakball construction with
electrical schematics and recommended test and repair procedures.
PARTS LET - Detailed breakdown of all parts used in the 4-Port and 2-Port
models.
a SERVICE BULLETINS - Section to be used to hold Field Change Orders,
Upgrade Bulletins and Tech Tips.
This manual is designed for use
by both the experienced and inexperienced service
technician. The Diagnostic Flowcharts (Sections
4 and 4A) provide detailed procedures
for technicians not completely familiar with the 5200 models. The Symptom Checklists
(Sections
5 and 5A) provide a rapid reference for the more experienced technician.
I
b
CX5200 Field Service Manual vii Changed
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183

SECTION 1
THEORY OF OPERATION
Overview
The ATARI Advanced Video Entertainment System (Model 5200) is an advanced
microcomputer. It receives input from the game controllers, Read-Only-Memory
(ROM) cartridges and other peripherals, and displays this input on
a T.V. screen. A
maximum of four players may play at one time.
The Model 5200 is composed of the console, switchbox and game controllers.
The
following paragraphs provide a general discussion of each of these items and their
component parts. For
a detailed discussion of the Game Controller see SECTION 6.
Model 5200 CONSOLE
The Model 5200 console is composed of an outer plastic case which houses the PC
board and its RF Shield. Figure 1-1 shows the console and its parts.
There are currently three different PC Boards being used in Model 5200 consoles.
Some models contain the original 4-port PC Board, number CA018087. Other consoles
contain a 4-port universal PC krd, number CA020108. A third PC Board with only
two player ports, number CA021374, is also available. Unless otherwise specified, the
references in this manual pertain to the original 4-port PCB, number CA018087. The
specific differences of the 4-port universal PCB and the 2-port universal PCB are
called out below.
Four-Port Universal PCB differences
External
The ATARI serial number on the bottom of the unit will have
a + as its third
designator.
For example:
CITE CODE DATE
Q-PORT
DESIGN ATOF
The chip designators have been changed. All chips are designated A
instead of U.
Two 74LS244 ICs (U4 and U15) were removed from the PC Board.
Two 74LS244 ICs (Ul4 and U28) were replaced with a 74LS125 (Al4) and
a
74LS51 (A15).
Provisional circuitry for future expansion has been added in order to
accommodate the
vcsTM cartridge adaptor.
CX5200 Field Service Manual
1-1
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Two-Port Universal PCB differences:
-
I)
All of the 4-port universal board differences listed above are included on
the 2-port universal PCB.
2)
Ports 3 and 4 and their associated discrete components have been removed.
3)
ICs A1 2 and A1 3 have been removed.
4) The automatic switchbox has been replaced with
a manual switchbox and
the
RF cable has been replaced with the standard RF cable.
5)
The power adaptor plugs directly into the rear of the console instead of
plugging into the switchbox.
Carrridqe
Player POI
Figure 1-1. Model 5200 Console (4-PORT)
CX52C10 Field Service Manual 1-2

Outer Case
The outer case consists of a bottom and a top plastic cover which are held together by
five Phillips-head screws.
At the rear of the bottom plastic cover (Figure
1-2) is:
a)
an opening for access to the channel 2-3 switch
b)
a removable door which allows access for future development.
In the base
is a cable wrap post for RF cable storage.
I I t
/
/
Channel 2-3 Future Development Access
Figure
1-2. Channel 2-3 Switch and
Future Development Access
The top plastic cover provides:
1)
openings at the front for the four player ports
2) the power switch cover
3) the power ON/OFF switch
4)
a storage area at the rear for two game controllers. The hinged cover for
this area comes off
as a separate piece when the top cover is disassembled.
RF Shield
An aluminum shield covers the PC Board and prevents the PC Board from generating
interference on the T.V. screen.
CX5200 Field Service Manual 1-3
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PC Board
-
I
The console you are servicing may contain either the original PC Board Number
CAOL8087 or the newer PC Boards Numbers CA020108 or CA021374.
See Page 1-1 of
-
this manual for an explanation of the three board's differences.
The PC Board consists of:
r
28 Integrated Circuit Chips on PC Board Number CA018087; 26 Integrated
Circuit Chips on
PC Board Number CA020108; 24 integrated Circuit Chips
on
PC Board Number CA021374.
a cartridge socket
an RF module
various discrete components
The major chips on the PC Board are:
Microprocessor Chip - MPU
The microprocessor (MPU) is the brain of the 5200. It makes the major decisions
based on information from the
ROM cartridge and the Random Access Memory.
Figure
1-3 shows the pin assignments for the MPU.
VSS
ROY
P 1
m
N.C
-
NMI
YNC
VCC
AU
A1
A2 '
A3
A4
AS
A6
A7
AS
A9
A10 '
A 11
HALT
Figure 1-3. MPU Pin Assignments
CX5200 Field Service Manual 1-4

Alphanumeric Televison Interface Controller (ANTIC)
The primary function of the Alphanumeric Television Interface Controller (ANTIC)
chip is to get data from memory, independent of the processor, for display on the
video screen.
Figure
1-4 shows the pin assignments for the ANTIC.
GROUND
GTIA DATA
GTIA DATA
Light Pen
GTIA DATA
N0.t Connected
Interrupt Output
~efresh
HALT
Address Bus
Address Bus
Address Bus
Address Bus
Read/Write
Ready
Address
Bus
Address Bus
Address Bus
Address Bus
Address Bus
VSS
.4 NB
AN 1
c?
AN2
RNMl
A3
A2
A 1
Ad
R/W
RDY
A10
A12
A13
A14
A15
D4
D5
06
07
RFT
FPhg
pwf
D3
02
Dl
DB
Ph2
A4
A5
A6
A7
A8
A9
All
VCC
Figure 1-4. ANTIC Pin Assignments
CX5200 Field Service Manual
Data Bus
Data Bus
Data Bus
Data Bus
Reset
Fast Phase 0 Clock
Phase 0 Clock
Data Bus
Data Bus
Data Bus
Data Bus
Phase 2 Clock
Address Bus
Address Bus
Address Bus
Address Bus
Address Bus
Address Bus
Address Bus
5V Power

-
Graphic Television Interface Adaptor (GTIX)
-
The Graphic Televison Interface Adaptor (GTIA) chip retrieves graphics data from
memory via the ANTIC DMA process. This data is routed to the GTIA graphics
registers. Figure 1-5 shows the pin assignments for the GTIA.
Address Bus
Address Bus
Ground
Data Bus
Dara Bus
Oata Bus
aata Bus
Trigger 0
Trigger 1
Trigger 2
Trigger 3
Port Select
Port Select
+CAP Control
Not Used
Not Connectad
Color Delay
Alphanum- Data 0
Alphanum. Data 1
Alphanum- Data 2
A1
A%
VSS
03
D2
Dl
Yf.
T1
T2
T3
sff
. S1
s2.
53
..
DEL
AN0
AN 1
AN2
0
GTIA
A2
A3
A4
Dk
D5
06
D7
R/Y
m
LUM o
a2
Fa'0
OSC
VCC
HALr
CSY NC
LUM 3
LUM 2 -
LUt.1 1
COL
Address Bus
Address Bus
Address Bus
Oata Bus
Data Bus
Data 3us
Data Bus
Read/Write
Chip Select 1
Luminance
o Output
Phase 2 Input
Clock Out e
Oscillator Input
Power
HALT q
Output Sync
Luminance 3 Output .
Luminance 2 Output
Luminance I Output
Color
Figure 1-5. GTIA Pin Assignments
POT Keyboard Integrated Circuit (POKEY)
The Pot Keyboard Integrated Circuit (POKEY) chip provides the interface between the '
game ports and the microprocessor. It also contains four semi-independent audio
channels, each with its own frequency, noise, and volume control. Figure
1-6 shows
the pin assignments of
the POKEY.
CX5200 Field Service Manual

Ground
Data
Bus
Data Bus
Data Bus
Data Bus
Data Bus
Phase 2 Clock
Pot
Scan
Pot Scan
Pot Scan
Pot Scan
Pot Scan
Pot Scan
Pot Scan
Pot Scan
Softfire
5 V Power
Not Connected
:<ey board Scan
Keyboard Scan
e
VSS
03
D4
D5
D6
07
#2
P6
P7
P4
P5
PZ
P3
PO
VCC
-
K5
i(4
K3
0
POKEY
D2
Dl
DO
AUDIO
A0
A1
A2
A3
R/W
CS 1
cso
-
IRQ
SOD
OCLK
BCLK
-
KRl
SID
K(;
K1
-
K2
Data Bus
Data Bus
Data Bus
Audio Out
Address Bus
Address Bus
Address Bus
Address Bus
Read/Write Control
Chip Select
Chip Select
Interrupt Request
Serial Output Data
Serial Output Clock
Bidirectional Clock
Xeyboard Read
Serial lnput Data
Net Cennec*ed
Keyboard Scan
Keyboard Scan
Figure 1-6. POKEY Pin Assignments
A switchbox is connected and mounted to the back of the television set.
The
switchbox that is used with the 4-Port Models is different from other switchboxes
manufactured
by Atari and from the 2-Port Model 5200. These differences include:
1
2)
two Select Switch functions. The two functions are:
NORMAL - Allows the Model 5200 to automatically switch between the
television and the
game when the Model 5200 ON/OFF switch is pressed.
STANDBY - Enables television viewing while the Model 5200 is turned on.
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GAME CONTROLLER
The game controller supplied with the Model 5200 is composed of an analog joystick, a
-
12-key Keypad, two separate Fire Buttons on each side, and three Select Buttons. The
game controller is discussed in detail in Section
6.
SUMMARY
The Model 5200 is an advanced microcomputer which receives input from the Game
Controllers, Read-Only-Memory (ROM) cartridges, and other peripherals. The console
PC Board is housed within an outer case and contains four major chips which allow for
interaction between the
game and the player. They are:
the Microprocessor (MPU),
the Alphanumeric Television Interface Controller (ANTIC), the Graphic Television
Interface Adaptor
(GTIA), and the POT Keyboard Integrated Circuit (POKEY).
The console, switchbox, and Game Controllers make up the Model 5200 System which
is addressed in the remainder of this manual.
CX5200 Field Service Manual

SILKSCREENS AND SCHEMATICS
On the following pages are representative silkscreens and schematics for the Model
5200. Minor variations in design may be encountered depending on the production date
of the unit, but these schematics provide
all details required for an in-depth
understanding of all Model
5200 units.
CX5200 Field Service Manual

Make pen and ink corrections to schematics on pages 2-4 and 2-4B as directed below.
1 Page 2-4
,a Remove connector line
I I T- I
I -
I I 1; IT.
shown as dotted line.
Page 2-4B
Page 2-40
Change U298
I
Page 2-4B
T Add ca~acitor
Page 2-48
Add SF3 between
+CAV and +5V on
Port 4.
CX5200 Field Service Manual