HP 9020 Service Manual page 116

4-16
Assembly Access
To remove I/O card from controller assembly:
1. Disconnect power connector from I/O card (Figure 4-15).
2. Disconnect 50-pin connector from I/O card (Figure 4-15).
3. Disconnect 20-pin and 34-pin connectors from I/O card by removing the four #2 Pozidriv
screws that attach the connectors to the card (Figure 4-15).
4. Remove four #2 Pozidriv screws that attach I/O card to assembly (Figure 4-15), and remove
card.
POWER CONNECTOR
DISC
CONTROLLER
34-PIN CONNECTOR
50-PIN CONNECTOR
*
#2 POZIDRIV SCREW
Figure 4-15. Disassembling Fixed Disc Drive Controller Assembly, View 1
CAUTION
REMOVE THE LOADERIID ROM FROM THE OLD CARD AND IN-
STALL IT ON THE NEW CARD, WHEN REPLACING THE 1/0
CARD. USE TOOL 8710-0585. IF ORDERING A NEW 10 ROM, THE
SERIAL NUMBER OF THE COMPUTER MUST BE PROGRAMMED
INTO THE REPLACEMENT 10 ROM. SEE THE REPLACEMENT
PARTS LIST FOR THE CORRECT ROM PART NUMBER. RETAIN
ALL CABLES AND SCREWS FOR INSTALLATION OF REPLACE-
MENT 110 CARD ON THE CONTROLLER ASSEMBLY.