4-12
Assembly
Access
Line Filter
WARNING
AFTER REPLACING THE LINE FILTER, PERFORM CONTINUITY
TEST BETWEEN
POWER CORD GROUND AND METAL CHASSIS.
RECORD RESULTS ON REPAIR
ORDER.
1.
SET THE POWER SWITCH ON THE REAR PANEL TO THE
"0"
POSITION AND DIS-
CONNECT THE AC POWER CORD FROM THE WALL OUTLET.
2.
Remove both front panels
and
the flip-top panels as previously described (HP
9040
only).
3. Remove top
and
bottom covers from the System
II
enclosure as previously described.
4.
Open
I/O
door
on
rear panel by turning both thumbscrews counterclockwise.
5. Disconnect
I/O cable connectors from I/O cards.
CAUTION
CAREFULLY HANDLE
110
CARDS TO PREVENT DAMAGE TO
CARDS
FROM
ELECTROSTATIC
DISCHARGE
OR
OTHER
CAUSES.
HOLD
BY EJECTORS
OR
SIDE EDGES ONLY. DO NOT
TOUCH
EDGE CONNECTORS
OR
CARD PLANES. IMMEDIATELY
PLACE CARDS IN ANTISTATIC BAGS
OR
ON ANTISTATIC SUR-
FACE.
6. Pull
out
on
card ejectors to release cards from I/O backplane
and
slide cards
out
of slots.
7.
Remove the I/O
lid
by releasing the power supply cable from the cable clamp
and
removing
the four
#2
Pozidriv screws that attach the I/O
lid
to the chassis.
8. Disconnect
I/O
door
interlock cable connector from I/O backplane,
and
remove I/O
door
interlock switch from rear panel.
9.
Remove both I/O card guides by pushing the two locating pins for each gUide
out
of the
casting while pulling the front of the guide toward the
open
door.
10. Disconnect the power supply cable from the power supply.
11. Remove the two nuts that attach the terminal block cover to the bottom of the rear panel,
and
remove the cover.
12. Loosen the four
#2
Pozidriv screws that attach the terminal block to the rear panel until they
clear the bottom of the rear panel. This allows the rear panel to be removed from the
box
unhindered by protruding screws.
13. Remove the eight
#2
Pozidriv screws (four at the top
and
four at the bottom) that attach the
rear panel to the enclosure,
and
slide the rear panel straight out.
14. Remove power switch cover by removing two
#2
Pozidriv screws that attach cover to rear
panel.
15. Disconnect three line filter wires from terminal block,
and
two line filter wires from
power
switch.
16. Remove four nuts
and
lockwashers that attach line filter to rear panel,
and
remove line
filter.
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