What must be done before replacing a 3-CPU3 card on an EST3?
Before replacing a CPU module, you must disconnect the standby battery and then remove AC power from the control panel to prevent equipment damage (Page 253) [1].
Because new modules are shipped with empty flash memory, you must also be prepared to download the cabinet configuration database to the replacement module (Page 255) [1].
Follow these requirements for substitution:
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Disconnect the battery, then remove AC power (Page 253) [1].
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Verify the replacement is the same model number as the original (Page 255) [1].
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Ensure the substitute module has an identical LED/Switch display installed (Page 255) [1].
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Identify the rail location to ensure the new module is installed in the same position (Page 255) [1].
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Download the configuration database using the SDU after installation (Page 255) [1].