phoenixgarage.org

I recently purchased a couple of these control panels from a local surplus vendor (Apache Reclamation and Electronics), and I am trying to find out how to interface to them, preferably with my Arduino. From what I have been able to discover, they are control panels for two particular Lexmark laser printers, the T612 and the T622...

Beyond that, I haven't been able to find much else that tells me how to interface to them, but maybe if you are reading this, you can help!

This is an example of what the module looks like, and the printer it fits in:

LCD Enclosure Questions or Comments?

  

Lexmark T622 Questions or Comments?

Here are pictures of the fronts of each control panel (note that they appear to be different revisions):

Front Side LCD 1 Questions or Comments?

  

Front Side LCD 2 Questions or Comments?

Here are corresponding pictures of the backs:

Back Side LCD 1 Questions or Comments?

  

Back Side LCD 2 Questions or Comments?

Finally, here are corresponding close-ups of the 5-pin (serial? I2C?) connectors on the backs:

Connector LCD 1 Questions or Comments?

  

Connector LCD 2 Questions or Comments?

These control panels apparently use some kind of Phillips IC for interfacing to the LCD controller (the epoxy blob on the backs); the two I have use a different controller (curious). I have contacted both Lexmark and Optrex about these modules; Lexmark basically told me "we can't give you that information" (I expected as much), and while I have heard back from Optrex about my issue, I sent a reply that hopefully they will follow up on.

I also found this interesting thread, which sounds like a similar display (16 x 2 character LCD - but no mention of buttons):

Unknown 2 Line LCD - avrfreaks.net (new window)

I have yet to try applying power to mine, as detailed in the link above; maybe I can find some time this weekend? If anyone has any information that can help me, it would be appreciated! Fortunately, I only spent a few dollars each on these displays; maybe I can put them up on Ebay if I don't get them figured out...