Sun Microsystems Netra t 1120, Service Manual

Page: 116 / 148

10-24 Netra t 1120/1125 Service Manual • August 1998
10.7 Motherboard
Caution – Use an ESD mat when working with the motherboard. An ESD mat
contains the cushioning needed to protect the underside components, to prevent
motherboard flexing, and to provide antistatic protection.
Note –
If the motherboard is being replaced, remove all SIMMs, PCI card(s), alarms
card, and CPU module prior to removing the motherboard. Note the chassis slot
location for each SIMM and PCI card prior to removal.
Note –
The NVRAM/TOD contains the system host identification (ID) and Ethernet
address. If the same ID and Ethernet address are to be used on the replacement
motherboard, remove the NVRAM/TOD from the motherboard and install the same
NVRAM/TOD on the replacement motherboard after installation.
10.7.1 To Remove the Motherboard
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 to the rear of the chassis.
See Section 7.1 “To Attach the Wrist Strap” on page 7-1.
2. Power off the system and remove the input power connector(s).
See Section 6.2 “To Power Off the System” on page 6-3.
3. Remove the top access cover.
See Section 7.2 “To Remove the Top Access Cover” on page 7-4.
4. Remove the power supply.
See Section 8.1.1 “To Remove the Power Supply” on page 8-1.
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