HP LaserJet 9000 Printer series - Manual (Page 201)

Appendix C Printer memory and expansion 201
Installing memory
CAUTION
Static electricity can damage DIMMs. When handling DIMMs, either
wear an antistatic wrist strap or frequently touch the surface of the
DIMM antistatic package, then touch bare metal on the printer.
To install memory
1 If you have not already done so, print a configuration page to
find out how much memory is installed in the printer before
adding more memory. (Press
22 on the numeric keypad when the
printer is idle.)
2 Turn the printer off. Disconnect the power cord and any cables.
3 Loosen the two captive thumb screws on the back of the printer.
3
2