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E331.E2501.061.21.02.02
System SIRECUST 1280/1281
Bedside Monitor - Service Manual
„
3.
4.8.2.
1 .
一
2.
3.
4.
5.
一
4.8.3.
1.
2.
8.
side
panel
and
to the holddown
standoff. Save the holddown
bar
and hardware for reassembly.
Simultaneously lift the two orange
ejectors on the top front and rear
corners
of the
board
and
pull
vertically on the ejectors to free
the board from its connectors on
the Motherboard and lift it out.
Replacing/Installing Software
Remove
the
Memory
Extension
Board
following
the
procedure
outlined in Section 4.8.1.
Remove
the
EPROMs
from
J17,
J18, J33, and J34.
Carefully
insert the
replacement
EPROMs
into positions J17, J18,
J33,
and
J34,
with the notches
facing towards jumper sockets X7,
X8, X6, and X12.
Firmly press on the EPROMs
to
seat them
in their sockets.
Reinstall
the
Memory
Extension
Board
following
the
procedure
outlined in Section 4.8.3.
Installing the Memory
Extension Board
Verify the positioning of jumpers in
accordance with Appendix C.
Insert
the
board
into
the
card
guides
for connectors
X31
and
X32 on the Motherboard, identified
by the orange color code on the
card
support
plate,
with
the
component
side
of
the
board
facing towards the CRT.
Carefully
position
the
board
connectors
X1
and X2 into X31
and X32 on the Motherboard, and
press on the ejectors to seat the
board.
4.9.
4.9.1.
NOTE:
The
ejectors
should
lie flat
along the top edge of the board.
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.
Clock Board, A960, Master
Option Board, A810, or 4-Ch
Analog Option Board, A971
NOTE:
The Clock Board is used in
standalone installations of monitors,
in
place of the clock normally available
when the monitor is connected
into a
SIRENET network.
Refer to Figure 4-3,
Removing
the
Clock
Board,
Master
Option
Board,
or 4-Ch
Analog Option Board
Remove
the
outer
case
of the
monitor
following
the
procedure
outlined in Section 4.1.1.
Remove the Phillips-head screws
(A)
and
washer
securing
the
holddown bar (B) to the right side
panel
and
to
the
holddown
standoff.
Save
the
screws
and
holddown bar.
Remove
and
save
any
Phillips-
head screws and washers located
in
the
rear
chassis
between
connectors X5-X6 and X7-X8.
Simultaneously lift the two white
ejectors on the top front and rear
corners
of
the
Clock
Board,
Master
Option
Board,
or
4-Ch
Analog
Option
Board,
and
pull
vertically on the ejectors to free
the board from its connectors and
lift it out of the monitor.
Page 4-9
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