Atari CX 5200 Field Service Manual page 135

DIAGNOSTIC
FLOWCHARTS
The
Diagnostic Flowchart
is
intended to be easy
to use
and the
primary
aid
when
troubleshooting the
Model
5200.
Follow
the
prompts
in
the order presented.
When
a
question
is
asked, follow the
line
from
the
box
that
best
applies to
your
unit's
condition.
When
that
line
terminates with
a
letter inside
a
circle,
locate the
letter
on
a different
page and
continue the
diagnosis.
The
flowchart leaves nothing
to
chance,
it
tells
you when
to
perform
a specific
test
and
when
to replace
components.
SWAP OUT PROCEDURE
At many
places
in
the diagnostic flowchart, a
box
tells
you
to
"swap out"
a
component,
a
chip, or
a
number
of chips
in
a
particular order.
The
"swap-out"
instruction
means
that
you should replace the indicated
components
(one at
a time) with a
known-good
component
of the
same
type.
The
unit
should
then be tested with the new,
known-good
component
in
place to see
whether
the
swap
out solved the
problem
being checked.
If
the
swap
out
did
not
fix
the problem, leave
in
the
new
chip
and swapout
the next.
Repeat
this
procedure
for
the rest of
the swapout.
Once
the unit properly functions,
reinstall the
removed
IC's to
determine which
are actually defective.
NOTE:
If
sockets or
components
are replaced, trim leads
as
close
to
PC
Board
as
possible (See
SUkscreen
-
shaded
areas indicate
which
leads to trim.
Only trim
leads in
shaded areas as close to board as
possible).
REPLACE
IN
ORDER
The
"replace
in
order" instruction
means
that you
should
replace the
components
indicated
in
the order
listed until
the
result
called out
in
the previous block
is
obtained.
X
-
Some
lines
terminates with an
X
inside
a
circle.
When
this
occurs, return to the
beginning of the test sequence (Mechanical
Check
page
7-7).
If
you have
questions or
require
further information,
call
your
Atari Techline
Specialist.
Inside California
(800)
672-1466
Outside
California
(800)
538-1535
CX5200
Field Service
Manual 7-10