HP LaserJet 1320 - Manual (Page 165)

DIMMs (memory or font)
The following sections provide instructions for installing, testing, and removing DIMMs.
Installing a memory DIMM (HP LaserJet 1320 series printer
only)
If you add memory (RAM only) to the HP LaserJet 1320 series printer, you can print more
complex print jobs.
To install a DIMM, follow the instructions below:
CAUTION Handling a DIMM (memory) without wearing a grounded, antistatic device might damage the
DIMM. Touch any metal part of the printer or other grounded metal before touching the DIMM.
1. Turn off the power switch, and unplug all of the cables connected to the printer.
2. Open the print cartridge door. To open the left side panel, gently pull it out.
ENWW DIMMs (memory or font) 155