Sun Microsystems Netra t 1120, Service Manual

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Chapter 8 Power Subassemblies 8-5
8.1.2 To Replace the Power Supply
Caution –
Use proper ESD grounding techniques when handling components. Wear
an antistatic wrist strap and use an ESD-protected mat. Store ESD-sensitive
components in antistatic bags before placing them on any surface.
1. Attach the wrist strap.
See Section 7.1 “To Attach the Wrist Strap” on page 7-1.
2. Position the power supply above the chassis. Rest it, upside-down (unlabeled side
up), on the front crossmember of the enclosure.
3. Connect the power cable to the removeable media drive assembly (if fitted).
4. Connect the three main power supply cables to the motherboard.
5. Connect the power cable to the SCSI backplane assembly.
6. Connect the power cable to the main fan assembly.
7. Connect the cable connector to the alarms card.
8. Position the power supply toward the rear of the chassis until the power supply
rear panel is flush with the chassis.
9. Using a No.2 Phillips-head screwdriver, tighten the eight captive screws securing
the power supply to the rear of the chassis.
10. Using a No.2 Phillips-head screwdriver, tighten the two captive screws securing
the power supply bracket to the chassis front crossmember.
11. Using a No.2 Phillips-head screwdriver, tighten the captive screw within the PSU
to the chassis L-bracket.
12. Using an 8mm wrench, secure the primary earth connection by tightening the M5
nut and captive washer.
13. Using an 8mm wrench, secure the logic ground connection by tightening the two
M5 nuts and captive washers.
14. Replace the top access cover.
See Section 7.3 “To Replace the Top Access Cover” on page 7-6.
15. Reconnect the input power connector(s) and power on the system.
See Section 6.1 “To Power On the System” on page 6-2.
16. Detach the wrist strap.
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