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NOTE
On HP9000/K250/K260/K450/K460/K370/K380/K570/K580 and 979KS systems, the
power supply has six captive screws, three each on the top and bottom.
7. Grasp the handle on the power supply and pull it out of the computer.
CAUTION
The power supply may weigh as much as 26.5 lbs (12 kg). Be careful lifting it and be
careful where you put it down.
8. Remove the back CPU cover plate by loosening the two (one top and one bottom) captive mounting screws and
pulling the cover plate away.
9. Carefully remove the CPU cards (if they are present) and place them on the anti-static sheet.
10. Reach into the computer and insert the tapered end of the extraction tool (8710-1982) into one of the extraction
slots (Figure 1-2, item 1) in the PAL socket (U30).
Figure 1-2
PAL Chip Socket
11. Gently pry up on the corner of the PAL chip (each side) until you can safely remove it. Be careful not drop the
chip inside the computer cabinet, because it could fall into the fan compartment.
12. Match the beveled corner (Figure 1-2, item 2) of the PAL socket to the beveled corner of the PAL chip
(A2375-81801).
13. Place the PAL chip into the socket and gently push until it fully seats.
14. Remove the HP-PB1 cover plate, and install the HP-PB card guides (5062-9367) and single high bulkheads
(5062-3343).
15. Replace the power supply and CPU card(s) that were removed.
16. Connect the power cord to the rear of the computer.
17. Turn the computer key switch to the ON position.
18. Observe the Front Panel Display and Console for any error or fault (FLT) messages.
Figure 1-3 shows the added HP-PB I/O slots. The four slots under the HP-PB 1 title are the additional
I/O slots. Any supported HP-PB I/O cards can now be installed into the computer.
I/O Upgrade
HP-PB Upgrade
1-5
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