01147.pdf

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2500 XL

(250-4074)

Battery

Faxback Doc. # 1147

Note: This cpu does not have a separate battery. Instead there is a

real-time clock chip that maintains the system time and date. The

clock chip includes an internal battery that powers the clock as well

as system CMOS RAM. A record of your system configuration is stored in

CMOS RAM.

Use part number MX-1561 to replace the real-time clock chip

Note: The replacement part is available from National Parts

┌────────────────────┐

│Replacing

the Chip:

│

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The real-time clock chip battery should last at least three years with

normal use. When it fails, the computer will not retain time and date

information correctly.

When a configuration error is detected, the following prompt is displayed

when you turn on the computer:

Invalid configuration information-please run Setup program

If the computer continues to display this message after you run Setup and

update the configuration, it might indicate that the battery is weak or has

failed.

To replace the real time clock chip, simply replace the chip at location U7

on the main logic board.

If you do not want to replace the clock yourself, a Radio service technician

will replace it for you.