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fan is clear of the housing, remove the fan from
the drive.
Reinstallation is a reversal of the removal proce-
d ure. When the fan is installed, ensure that the
fan cable is aligned with the cable clamps (54) on
the mainframe. Ensure also that the cable connec-
tors disconnected in steps e, g, and h are properly
seated in their mating connectors. Check that the
fan is operating properly before returning the
drive to service.
5-10. UO-FRA4 (POWER SUPPLY
ASSEMHL Y A4)
Note:
This procedure is applicable for
both the HP Part No. 07940-60094
and HP Part NO. 09133-67120
Power Supply Assembly A 4. Both
power supplies are
throw-away
items.
To remove power supply assembly UO-FRA4 (41),
proceed as follows:
a. Perform the preparation for service procedure
outlined in paragraph 5-2.
h. Ensure that the power cord is disconnected from
the - AC LINE connector on the rear panel of
the drive.
c. Remove the top shroud (refer to paragraph 5-4)
and the front panel (refer to paragraph 5-7).
d. Disconnect connector Pion power cable assemb-
ly WI (37) from connector J 1 on power supply
assembly UO-FRA4 (41).
e. Disconnect the fan (23) cable connector B 1 PI
from connector J 1 on power supply assembly
UO-FRA4 (41).
f. Disconnect connector P6 on power cable assemb-
ly WI (37) from connector J2 on power supply
assembly UO-FRA4 (41).
g.
Remove the two TIS screws (38) which secure
power supply assembly UO-FRA4 (41) to the
mainframe assembly (50).
h. Remove the TI0 screw (39) and spacer (40)
which secure power supply assembly UO-FRA4
(41) to the mainframe assembly (50).
Removal and Replacement
7942 and 7946
i. Carefully slide power supply assembly UO-FRA4
( 41) forward and out of the drive.
CAUTION
Ensure that the two TIS screws
(38), T 10 screw (39), and spacer (40)
removed in steps g and hare
reinstalled.
These attaching parts
are required to properly ground the
power supply to the mainframe as-
sembly.
Reinstallation is a reversal of the removal proce-
dure. Check that the cable assembly connectors
disconnected in steps d, e, and f are properly seated
in their mating connectors.
5-11. UO-FRAI (DISC DRIVE ASSEMBLY AI)
To remove disc drive assembly UO-FRA 1 (26),
proceed as follows.
Note: The length of the cables connected
to disc drive assembly UO-FRAI al-
Iowa substitute disc drive assembly
to connected into circuit adjacent
to the installed assembly. This per-
mits operation of the assembly in
the drive to be verified before
removing it from the mainframe.
a. Perform the preparation for service procedure
outlined in paragraph 5-2.
b. Ensure that the power cord is disconnected from
the - AC LINE connector on the rear panel of
the drive.
c. Remove the top shroud (refer to paragraph 5-4)
and the front panel (refer to paragraph 5-7).
d. Disconnect connectors P3 and P4 on ribbon
cable assembly W3 (36) from connectors J 1 and
J2,
respectively,
on
disc
drive
assembly
UO-FRA 1 (26).
e. Disconnect connectors P4 and P 5 on power cable
assembly WI (37) from connectors J3 and J4,
5-5
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