Chapter 8 Removing and Installing Subassemblies 107
d. Locate the CD-ROM DC power harness (labeled P2) under the second metal
cable clip on the chassis floor.
e. Route the SCSI data cable (labeled P1) between the plastic clips at the rear of
the card guide. Connect SCSI data cable to the SCSI backplane.
f. Connect the DC power harness (labeled P3) to the SCSI backplane.
g. Connect the DC power harness (labeled P1) to the rear of the power supply.
2. Install the power supply.
See “Installing the Power Supply” on page 58.
3. Connect the DC power harness (labeled P4) to the diskette drive.
4. Insert the front edge of the system board into the card guide, then lift the rear of
the board slightly and slide it along the card guide until it is fully inserted
(
FIGURE 8-34).
5. Connect the DC power cable, diskette data cable, SCSI data cable, and speaker/
LED cable to the system board (
FIGURE 8-40).
Note – Thread the SCSI data cable through the metal cable clips on the chassis wall
after it is connected to the system board.
6. Install the SBus card.
See “Installing an SBus Card” on page 156.
7. Tighten the two captive Phillips-head screws that secure the system board to the
chassis rear (FIGURE 8-34).
8. Install the CD-ROM drive.
See “Installing a CD-ROM Drive” on page 124.
9. Detach the wrist strap and replace the cover.
See Chapter 7.
10. Power on the system.
See “Turning On the Power” on page 47.
Diskette Drive Cable
The SPARCstation 20 system is configured with one of two chassis types:
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