Atari 400 Field Service Manual

SECTION
10
SERVICE BULLETINS
This
section is
to be used
by you to
file the three
classifications
of
service
bulletins
which are
periodically
released by
the Consumer
"Product
Service,
Manager
of
Technical
Support.
The
following
are brief
descriptions
of each
classification:
FIELD
CHANGE
ORDER
A
Field
Change
Order
describes
hardware
or software
changes
to ATARI
Computer
products
and
instructs how
to implement
these
changes.
To
indicate
your required
action, a Field
Change
Order is
issued
in one
of the
following
two
categories:
MANDATORY
- This
identifies
a failure
mode
which
affects
reliability
and
describes
a proceflure
to
correct the
failure.
This
procedure
must
be
performed
on all
units
serviced
or repaired.
AS
FAILS
- This
identifies
a failure
mode
which
affects
reliability
and describes
a
procedure
to
correct the
failure
mode.
This
procedure
must
be
performed
on
on
an as
fails
basis.
UPGRADE
BULLETIN
An
Upgrade
Bulletin
describes
product
improvements
or
modifications
which
the
consumer
may
wish
to
purchase.
These
Bulletins
allow
you to
modify
the
customer's
unit
to
add
capabiUties
which
may
not have
been
available
when
the unit
was
oriflinaUy
manufactured.
TECH
TIP
A
Tech Tip
is
a document
of a
general
nature which
transmits
routine
service
or repair
information.
By
communicating
methods
developed
since
you
attended
training
classes.
Tech
Tips
aid to
continuously
improve
repair
skills
and
increase
knowledge
of
ATARI
Computer
Products.
Other
times,
Tech
Tips
alert
you to
units
which
have been
modified
and
are now
standard
from
ATARI
Manufacturing,
but
are
different
from
many
existing
units
and
require
different
repair
techniques.
ATARI
Home
Computer
lO-l

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)