HP 450c Service Manual - Page 128
Installing a RAM or ROM SIMM, A RAM SIMM provides the Printer with extra memory. A ROM SIMM
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Installing a RAM or ROM SIMM A RAM SIMM provides the Printer with extra memory. A ROM SIMM contains new firmware code to override the internal firmware code. 1. Make sure that the Printer is switched OFF and that neither the power cord nor an interface cable is connected. 2. Unscrew the cover plate and the cable clip at the back of the Printer, and remove it. Torx-10 or Flat Before handling a SIMM, either put on a grounding wrist strap and attach the end to the metal chassis of the Printer, or touch the outer metal surface of the Printer with your hand. Otherwise, static electricity from your body could damage the SIMM. 3. Take the SIMM out of its bag, holding the SIMM only by the edges. 4. With the SIMM's small notch on the left and the metallic edge away from you, load the SIMM into the slot: D nearest to you (RAM SIMM). D furthest from you (ROM SIMM). To do this, first hold the SIMM at an angle, and then gradually push it back until it clicks vertically into place. Notch 2 1 5. Replace the cover plate, the cable clip (held by the left screw) and the screws. 8-6 HP DesignJet 430, 450C and 455CA Printers Removal and Installation