HP 7936 Support Manual page 118

Removal And Replacement
7936 and 7937
f. Carefully slide the HDA (35) out of the drive
and place it on a firm work surface.
NOTE
If the HDA is not being replaced, skip
steps q through t.
g. Remove the shunt connector from J I of the
new HDA and place it on connector J 1 of the
old HDA.
NOTE
A spindle lock is installed on replace-
ment HDAs to protect them during
shipment. During installation, the lock
must be removed from the new HDA
and installed on the old HDA to protect
it during shipment back to the factory.
Two different types of locks are used:
spring-type (see figure 6-1) and bracket-
type (see figure 6-2).
h. Carefully tilt the new HDA until it is resting on
its side and the spindle lock is accessible.
6-8
Identify the type of spindle lock installed on
the HDA (see figures 6-1 and 6-2).
i. To remove a spring-type spindle lock (figure
6-1), push down on the lock and disengage it
from the base plate. Remove the lock and in-
stall it on the old HDA.
j. To remove a bracket-type spindle lock (see
figure 6-2), proceed as follows:
1) On the new HDA, remove the two T 15
screws (39, figure 9-1) securing the spindle
ground spring assembly (40) to the BDA.
Remove the ground spring assembly.
2) Remove the two T 15 screws securing the
spindle lock to the new HDA and remove
the lock.
3) Reinstall the spindle ground spring assembly
on the new HDA.
4) Instal1 the spindle lock on the old HDA by
reversing the previous three steps.
Reinstallation of the HDA is a reversal of steps a
through p of the removal procedure.