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Chapter 10 Motherboard and Component Replacement 10-23
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 and FIGURE 10-9).
Caution – Handle the motherboard by the handle, back panel, or the edges only.
2. Place the motherboard on an antistatic mat.
TABLE 10-2 Serial Port Jumper Settings
Jumper Pins 1 + 2 Select Pins 2 + 3 Select
Default Shunt
on Pins
J2604 RS-232 RS-423 2 + 3
J2605 RS-232 RS-423 2 + 3