Amiga 1000 - Page 14

AMIGA
1000
ASSEMBLY
LEVEL REPAIR
1.9
PCB CHECK
NOTE:
Initially, it may
be
necessary to
replace
the
PCB en-
tirely
to
check if a
PCB
EXCHANGE
is
necessary.
Follow the
disassembly/assembly
instructions
in
Sec-
tions
2
and 3.
Once the
DIAGNOSTIC AIDE is
available
in the field, you
may
confirm proper
operation
of
the
system by
following
these steps:
1.9.1 Place a
"known good"
PCB
on the
bench beside
the
unit
under test.
•
Refer to
SECTION
2, COMPUTER
DISASSEMBLY,
to open case
and
remove
shield.
1
.9.2 The
DIAGNOSTIC
AIDE is
a
straight-through
test
device
that
enables
you to
run
the
system
from the
"known
good"
board.
Position
the
DIAGNOSTIC
AIDE over the
holes in
the
casework
at
the front
of the
unit.
1
.9.3 Remove the cables
from the
unit PCB and
connect
them to the
DIAGNOSTIC
AIDE as
indicated.
1.9.4 Attach the
DIAGNOSTIC
AIDE cables to
the
"known good"
board and
it will
now run
the
system.
1.9.5
Return
to
SYSTEM TEST
and
begin test from
the
start.
•
if the system
now PASSES
ail
tests,
EXCHANGE
THE
PCB
ASSEMBLY.
•
If the
system still
FAILS,
verify that your
"known
good"
PCB is
in
fact
GOOD.
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