Amiga 1000 - Preliminary Notes

AMIGA
1000 ASSEMBLY LEVEL
REPAIR
1.2
PRELIMINARY
NOTES
Required Equipment:
Kickstart Disk
Workbench
Disk
Workbench
Dealer Demo Disk
Blank
Disk
or Disk for Testing
Monitor
RAM Expansion
Cartridge 1050
Mouse or
Keyboard
Known
Good Drive
Known Good PCB
Oscilloscope
OPTIONAL: Service
Diagnostic Aide
If
a
SOFTWARE
PROBLEM is
suspected, verify
that the
software
package
operates
CORRECTLY ON A
"Known Good"
system before
beginning test on the
"Suspected
Bad"
system.
1
.2.1
When the system is
POWERED-DOWN, it
should
be left
OFF for at least
5
seconds
before
it is
powered
up again.
)
IF
THIS
IS NOT
DONE, THE AC POWER
SWITCH
MAY
FAIL.
Whenever
possible,
RESET the system by
depressing
the
"CNTRL" key
and both
"A" keys,
simultaneously.
1 .2.2 It may
be
necessary to
insert a diskette
MORE
THAN
ONCE before it is
seated
correctly
in the drive. Continued
difficulty
in
correctly
seating the
disk
indicates a
defective or
incom-
patible disk
or a
drive
mechanical problem.
1.2.3 NEVER remove
a
disk
when the
DISK ACCESS
LED is
ON. Damage to
the disk may
result. If the
system LOCKS-UP, RESET it by
depressing
the
"CNTRL" key
and both "A"
keys,
simultaneously.
1.2.4 If
a
PCB is
replaced, ALL case
and shield
screws must
be
re-installed.
IF SCREWS
ARE MISSING,
EXCESSIVE
RF NOISE
MAY RESULT.
1 .2.5 The GROUND
STRAP on
the
drive
assembly must be
connected
when
the
disk
is
being
accessed.
IF
THE GROUND
STRAP
IS NOT
CONNECTED,
READ/WRITE
ERRORS MAY OCCUR.
1.2.6 If the system
LOCKS-UP when the
keyboard
is
disconnected
and
connected, it
may
indicate
a
defective keyboard.
1.2.7 System
functions that
are
displayed as
GHOST
functions are
NOT
OPERATIONAL at
\ this
time.
An
attempt
to
use
those functions may
appear
to be a
malfunction
of the
system.
1-2