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Installing System Board Options 8-15
the RTC chip in NVRAM is erased each time the com-
puter is turned off. Therefore, the system configuration
information must be reentered and the options reset each
time the system boots until the RTC chip is replaced.
To remove the RTC chip, follow these steps:
1. If possible, enter the system setup program and
make a printed copy of the system setup screens.
See Chapter 4, “Using the System Setup Program,”
in the system User’s Guide for instructions.
2. Remove the left computer cover.
See “Removing the Computer Covers” in Chapter 7.
3. Cut the cable tie that secures the chip to the sys-
tem board.
NOTE: The cable tie binding the chip to the system
board was necessary for shipping purposes. You will
not need to replace the tie after replacing the RTC
chip.
4. Remove the RTC chip.
Pry the RTC chip out of its socket an integrated cir-
cuit (IC) removal tool.
5. Align the pin-1 corners of the RTC chip and the
socket (see Figure 8-13).
NOTE: Identifying the pin-1 corners is critical to
positioning the clock correctly.
Identify the pin-1 corner of the RTC chip by locating
the small dot in one corner on the top of the chip.
The pin-1 corner of the socket is on the side with a
notch.
6. Install the new RTC chip.
With the pin-1 corners of the socket and chip
aligned, set the chip lightly in the socket and make
sure all pins are matched with the correct holes in the
socket. When the chip is positioned correctly, press
down until the chip is firmly in the socket.
Figure 8-13. RTC Chip
CAUTION: See “Protecting Against Electro-
static Discharge” in the safety instructions at
the front of this guide.
WARNING: If the system has been running,
any installed microprocessor and heat sink on
the modules will be hot. To avoid the possibility
of a burn, be careful when removing or install-
ing system board components that are located
near the microprocessors.
WARNING: Replace the RTC chip only with
the same or equivalent type recommended by
the equipment manufacturer to avoid the dan-
ger of explosion. Discard the RTC chip
according to the manufacturer’s instructions.
CAUTION: When placing the RTC chip in the
socket, be sure that all of the pins on the chip
go into the corresponding holes of the socket.
Be careful not to bend the pins.
RTC
socket
RTC chip
notch
pin-1
corners