Digital Equipment FR-902AA-A3, Service Maintenance Manual

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Digital STARION 400i - 900i PC Service Procedures
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Removing and Replacing the Real-Time Clock (RTC)
The Starion Minitower PC computer RTC integrates a battery with the computer clock and retains any
setup information when it is turned off. If the computer ever fails to retain the correct date, time or
configuration settings when it is turned on, the computers RTC must be replaced.
To replace the RTC, perform the following:
1) Record computer configuration settings using the BIOS Setup utility.
2) Turn off the computer, disconnect external devices, ac power and monitor power.
3) Unlock and remove cover.
4) Carefully extract old RTC from socket.
5) Install new RTC.
CAUTION
Make sure pin 1 on RTC is correctly aligned with location on socket (A). Incorrect
installation can cause faulty computer operation.
6) Replace the cover.
7) Connect external devices and restore power.
8) Run BIOS Setup utility to reconfigure computer using recorded configuration settings from step 1.
9) Refer to BIOS Setup Utility.