Replacing A Motherboard - Sun Microsystems Ultra 60 Service Manual

10.7.2

Replacing a 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.
Caution – Handle the motherboard by the handle, back panel, or the edges only.
Note – Jumpers J2604 and J2605 can be set to either RS-423 or RS-232 serial
interface. The jumpers are preset for RS-423. RS-232 is required for digital
telecommunication within the European Community.
1. Using long-nose pliers, set the motherboard serial port jumpers J2604 and J2605
(
TABLE 10-2
TABLE 10-2
Jumper
J2604
J2605
Caution – Handle the motherboard by the handle, back panel, or the edges only.
2. Place the motherboard on an antistatic mat.
and ).
FIGURE 10-9
Serial Port Jumper Settings
Pins 1 + 2 Select
RS-232
RS-232
Chapter 10 Motherboard and Component Replacement
Default Shunt
Pins 2 + 3 Select on Pins
RS-423 2 + 3
RS-423 2 + 3
10-23