The HP Designjet 500, 510, and 800 series printers can have additional SODIMM memory installed on the HP-GL/2 accessory card (500, 500ps, 510), or the formatter card (800, 800ps).
To prevent damage to the printer circuits from high-voltage electrostatic discharge
(ESD), follow the Electrostatic Discharge (ESD) Precautions before following the SODIMM installation instructions:
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Do not wear clothing that is subject to static build-up.
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Do not handle integrated circuits (ICs) in carpeted areas.
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Do not remove an IC or a printed circuit assembly (PCA) from its conductive foam pad or conductive packaging until you are ready to install it.
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Ground (earth) your body while handling IC's or PCA's (wrist strap, etc).
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After removing any PCA from the printer, place it on a conductive foam pad to prevent ESD damage to any ICs on the PCA.