Replacement Of The Pca Board - HP 30020B Installation And Service Manual

Maintenance
b. Turn off the system power.
I
CAUTION
I
All power must be off when inserting
or removing any device or card in the
system.
c. Disconnect the cable hood connector and the ribbon cable con-
nector from the edge of the INP PCA board.
d. Remove the INP PCA board (part no. 30020-60009) from the card
cage.
e. With the PCA board lying on a smooth, firm surface, withdraw
the defective RAM chip out of its socket with a chip ex-
tractor tool.
f. Immediately discard the removed RAM chip, or mark it as
scrap, to avoid the possibility of its being inadvertently
reinstalled as a new replacement part.
NOTE
Bending the pins of the defective RAM
chip immediately upon removal is an
effective way of marking it as scrap.
g. Press a new RAM chip into the socket.
h. Reinstall the INP PCA board in the computer card cage, using
the procedure described under "Hardware Installation Proce-
dures" in Section II, Installation.
i.
Verify that the INP is now working
under "Installation Verification"
lat ion.
4-18. Replacement of the PCA Board
properly
in Section
as described
II, Instal-
When the troubleshooting procedures outlined in paragraph 4-14
indicate the need for replacement of the INP PCA board, proceed
as follows:
a. Ensure that the system operator has backed up the system
files before beginning this procedure.
4-12