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c. Disconnect the HP-IB assembly from connector
Jl on controller PCA-A6 (9).
Reinstallation is a
reversal of the removal
procedure.
6-8.
FRONT PANEL
To remove the front panel (41, figure 9-1), proceed
as follows:
a. Perform the drive preparation for service pro-
cedure outlined in paragraph 6-4.
b.
Pull forward on the front panel (41), to release
it from the two snap-in studs (50) on the front
cover (49) and the two studs (89) on the drive
mainframe (90).
c. Remove the front panel (41) from the drive.
Reinstallation
is a
reversal of
the
removal
procedure.
6-9.
FRONT COVER
To remove the front cover (49, figure 9-1), proceed
as follows:
a. Perform the drive preparation for service pro-
cedure outlined in paragraph 6-4.
b.
Remove the front panel (refer to paragraph
6-8) from the drive.
c. Remove the twelve T15 screws (47) and two
TI0 screws (48) which secure the front cover
(49) with prefilter (53) attached, to the drive.
d.
Remove the front cover (49) and prefilter (53)
from the drive.
Reinstallation is a
reversal of the removal
6-10.
Removal And Replacement
7936 and 7937
CONTROLLER PCA-A6
To remove controller PCA-A6 (9, figure 9-1),
proceed as follows:
a. Remove the rear cover (refer to paragraph 6-6)
and the HP-IB assembly (refer to paragraph
6-7) from the drive.
b.
Remove power jumper cable W6 (5) and signal
jumper cable W7 (6) from the drive.
c. Disconnect connector P2 on BDA cable W8 (7)
from connector J7 on read/write PCA-A2 (16).
d.
While holding cable W8 (7) out of the way,
press down on the PCA guide (78) latch and
withdraw PCA-A6 (9), with servo PCA-Al (11)
and read/write PCA-A2 (16) attached, until
servo PCA-AI latches.
e. Disconnect read/write PCA-A2 (with controller
PCA-A6 attached) from servo PCA-Ai.
f.
Remove the four T 1 0 screws (8) which secure
HP-IB PCA-A6 (9) to the PCA shield (15).
g.
Disconnect
controller
PCA-A6
(9)
from
read/write PCA-A2 (16).
Reinst.allation
is a
reversal
of the
removal
procedure.
6-11.
EPROM KIT, CONTROLLER PCA-A6
To remove the EPROM kit (10, figure 9-1) from
controller PCA-A6, proceed as follows:
a. Remove controller PCA-A6 (refer to paragraph
6-10) from the drive.
b.
Remove the four EPROMs (10) from their
28-pin sockets on PCA-A6. See figure
A-4
for
the location of the EPROMs.
procedure.
c. Place the EPROMs a piece of anti-static foam.
Reinstallation is a reversal of the removal process.
6-3
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