Philips P2812

Overview

The Philips P2812 is a slightly different keyboard compared the OEM version of the First and Second generations of OEM NMB keyboards. The colour of the painting on the earlier version of the Philips P2812 keyboard is a greyer heu than the OEM colourway. Later on in production the actual case colour changed via the plastic rather than just the paint used.

Switches
Keycaps
Upper Case
Mounting Plate
PCB
Back Plate
Cable

Switches

Keycaps

The keycaps on this keyboard come with clips that can be found on later generations of NMB keyboards. Keycaps in the first generation have shiny sides of the keycaps.

Upper Case

The case contains eight mounting points that are threaded bosses. The threaded bosses are brass for earlier models whereas later models used screws that threaded into the upper case plastic.

The bosses that are found on the sides of the case are used to attach the switch plate assembly to the upper case. The bosses on the upper and lower edges of the case are used to attach the backplate to the upper case. The retractable feet are hooked into the upper case through a pigtail-like wire that hooks into the upper case. This provides resistance when the feet are extended and locked into the outward position.

Back Plate

The backplate consists of a single plate with a V-shaped trough that is offset from the top edge of the upper case and runs laterally parallel to the top edge. The backplate is black. Early models of the first generation keyboards contain a steel backplate whereas later models used plastic for the backplate. Note that earlier models contain a grounding screw in the back plate where later models do not.

Switch Plate

The switch plate is made out of stamped steel. The plate is bent on either so that it can be mounted to the upper case. The plate is painted with a thin layer of black paint. The paint is then protected by a thin layer of oil to prevent rust.

PCB

The PCB is a double-sided PCB with all traces on the backside of the PCB. The controllers found on the PCB vary, some later models have been found with both Toshiba and Mitsubishi controllers.

Cable - RJ-11

The coiled cable is normally 30 cementers long with RJ connectors on either end. Keyboards that use the RJ cable have a RJ-11 female jack in place of the molded block that would have been used for the 5 pin din cable.