Fc 5094, Fc 9094 - Device Board - Db1 And Db2 - IBM iSeries 270 Service Manual

FC 5094, FC 9094 - Device board - DB1 and DB2

For use by authorized service providers.
Use this procedure to remove or replace the device board - DB1 and DB2 in an FC 5094 or FC 9094.
To remove or replace the device board - DB1 and DB2:
1. Power off the expansion tower. See Power on/off the system and logical partitions.
2. Disconnect the power cord from the expansion tower.
3. Open the front cover. See FC 5074, FC 5079, FC 5094, FC 5294, FC 9079, FC 9094 - Covers.
4. From the front of the expansion tower, perform the following:
a. Remove the EMC access plates from the disk unit enclosures that are located in front of the
backplane that you are replacing. (For location information, see Locations and addresses.) Press
the surfaces of the two latching mechanisms together and tilt the top of the cover away from the
frame to remove it.
b. Record the locations of the disk units and then remove them from the disk unit enclosures that you
just uncovered.
Attention: The disk units are sensitive to electrostatic discharge (see Work with electrostatic
discharge-sensitive parts).
c. Remove the screws that hold the disk unit cage assembly to the frame.
d. Remove the two retaining screws that are located inside of the disk unit cage assembly (the top
right and bottom left corners).
e. Remove the disk unit cage assemblies.
f. Remove the screws that hold the DASD shelf to the frame.
g. Remove the DASD shelf from the frame.
5. Remove the retaining screw that is holding the DASD board assembly to the frame.
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Hardware (Remove and Replace; Part Locations and Listings)