HP 7942 Service Manual page 155

Service Notes
7942 and 7946
B-14
• The invididual part numbers are not orderable.
•• Note that the
U
location number stamped on the individual
eproms will
be
different than listed because these eproms
are
also used in the 9144A product.
Also, if the drive serial perfix is 2513 or less, then also
pull the spindle ground button assembly on the disc mechanism
(part nos. 07941-60021, 07941-69021, 07945-60021 or 079QS-69021)
away from the spindle motor to eliminate a potential noise
problem. FollOW these instructions:
1. Remove the Disc Mechanism per procedure 5-11 in the 7941/45A
Service Manual.
2. Lay the Disc Mechanism upside down on an anti-static mat.
3. Remove the mounting tray. This will expose the spindle ground
button assembly which is attached to the Data PCA.
4. Pull on the spindle ground assembly so that it no longer makes
contact with the spindle motor.
S. Reassemble "the drive. If you have a new mounting tray (part no.
07941-67902), then carefully follow the reassembly procedure
outlined in Service Note 07945-08. A new mounting tray has a
reinforced base and no right side panel.
Also, if the drive serial prefix is 2505 or less, check
to
see
that the product safety service Update has been performed per
the procedure given in Service Note 07942/46-03S.
• • • • • • • • • • • • • • • • • • * • • • • • • • • • • • • • • •
• When oatpleting the
CUstaner Support Order (CS» the repair Type.
• nust
be coded 02G
am
the
repair class
lTIlSt be coded SN
(Service.
• NXe.
The
serVICe
code. block must be filled in with 20038. For •
•
~users,
the
service
code (20038)
must
be entered
in •
• the
print
field. - - •
• • • • • • • • • • • • • • • • • • • • • • • • • • • * • • • • • •