Replacing bus terminator circuit pack 99
DPP Card Replacement Guide BCS35 and up
Procedure 11–2
Replacing bus terminator circuit pack – models H01 and later
( H02 or I01, for example),
(continued)
Step
Notes
Description
10
From the rear of the IOE frame, insert
a sheet of cardboard (approximately
12" x 12" x 1/16") under the left side of
the DPP.
The cardboard prevents
losing the screws to be
removed.
11
From the rear of the IOE frame, use a
2–1/2–inch No. 2 flat–blade screw–
driver to remove the two screws
holding the ribbon cable shield.
The screws are approximately
2–inches to the rear of the
DPP mounting bracket.
If the DPP shipping bracket is
still attached, remove it for
access to the ribbon cable
shield screws. Do not reinstall
the shipping bracket or its
screws. Store them with the
other DPP shipping items.
12
Hold the cables out of the way.
Remove the suspected bus terminator
circuit pack by inserting a finger in the
hole provided in the circuit pack.
Apply firm, even pressure to
remove the circuit pack.
13
Insert the replacement bus terminator
circuit pack.
Use high insertion force for
proper seating. Use a thimble
or other mechanical aid for
proper seating.
14
Fold the DSI cables back into position
along the outer wall of the chassis.
15
Remount the ribbon cable shield over
the DSI cables.
If it does not fit properly,
check the folding of the DSI
cables. Do not crimp the
cables.
16
Insert the two screws to hold the cable
shield in place. Remove the
cardboard sheet after this step.
This requires one person at
the rear of the IOE frame .
Do not overtighten. Another
person at the front of the
IOE frame should hold the
ribbon cable shield in place.
17
Reinsert the DSI circuit packs in slots
12 and 13 and the Disk Interface
circuit pack in slot 11.
Return the DSI circuit packs
to the appropriate locations.
(continued)