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ЕЗЗ1.Е2501.061.21.02.02
System
SIRECUST
1280/1281
Bedside
Monitor - Service Manual
4.7.1.
4.7.2.
Removing the Front End Board
Remove
the
outer
case
of
the
monitor
following
the
procedure
outlined in Section 4.1.1.
Remove
the
two
Phillips-head
screws
(A) and washer securing
the holddown bar (B) to the right
side
panel
and
to the standoff.
Save
the
holddown
bar
and
hardware for use in reassembly.
Remove and save the four Phillips-
head
screws
and
washers
(D)
near
X16
(SIREM
1)
and
X17
(SIREM
2)
on
the
back
of the
monitor,
which
secure
board
connectors
X3
and
X4
to
the
monitor chassis.
Simultaneously lift the two green
ejectors on the top front and rear
corners
of the
board
and
pull
vertically on the ejectors to free
the board from the connectors on
the Motherboard
and
lift it out of
the monitor.
Replacing/Installing Software
Remove
the
Front
End
Board
following the procedure outlined in
Section 4.7.1.
Remove the EPROMs
from posi-
tions
J17,
J18,
J33,
and
J34,
using an IC extractor.
Carefully
insert the
replacement
EPROMs
into positions J17, J18,
J33,
and
J34,
with the
notches
facing toward connectors X3 and
X4 on the left side of the board.
Firmly
press
on
each
of
the
EPROMS
to
seat
them
in
their
sockets.
Reinstall
the.
Front
End
Board
following the procedure outlined in
Section 4.7.3.
4.7.3.
4.8.
4.8.1.
Installing Front End Board
Verify the setting
of jumpers
in
accordance with the configuration
given in Appendix C.
Insert
the
board
into
the
card
guides
for connectors
X11
and
X12 on the Motherboard, identified
by the green color code on the
front card support plate, with the
component
side
of
the
board
facing the CRT.
Carefully
position
board
connectors
X1
and
X2
into X11
and X12 on the Motherboard.
Press
on
the
ejectors
to firmly
seat the board.
NOTE:
The
ejectors
should
lie flat
along the top edge of the board.
Secure connectors X16 (SIREM 1)
and X17 (SIREM 2) to the chassis
using
Phillips-head
screws
and
washers (D).
Position
the
holddown
bar
(B),
and
secure
it to the
right side
panel and standoff using Phillips-
head screws (A) and washer.
Close
the
monitor
following
the
procedure
outlined
in
Section
4.1.2.
Memory Extension Board, A400
Refer to Figure 4-3,
Removing the Memory
Extension Board
Remove
the
outer
case
of
the:
monitor
following
the
procedure
outlined in Section 4.1.1.
Remove
the
two
Phillips-head
screws
(A) and washer securing
the holddown bar (B) to the right
Page 4 - 8
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