# Re: Hardware details for FB630U

From: Stefan Nilsen (stefan.nilsen@telia.com)
Date: Wed Jun 13 2001 - 14:50:21 PDT

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  > After running out of options for trying to understand the interface, I
  > decided to pull my scanner to pieces earlier this evening. Canon had done
  > a good job with one-piece moulded plastic and unnecessary amounts of glue,
  > but I got the glass off and removed the PCB cover without breaking
  > anything. And yes, they've gone out of their way to cut corners.
  >
  > Findings:
  >
  > (1) LM9830 chip, courtesy of National Semiconductor (note: parallel port
  > chip).
  >
  > (2) GL640 USB-to-parallel convertor. Docs are fairly inpenetrable, though
  > I hoped someone here might have come across this chip before: it's a
  > standard one used in printers, IIRC. Anyway, here's the link:
  >
  > http://www.genesyslogic.com/gl640ucb.htm
  >
  > (3) One other large chip (an SBT, SB61H1024AS-12), which looks like RAM,
  > plus other small ones (I've noted numbers and taken photos of the PCB for
  > posterity).
  >
  > So it looks like we're dealing with a parallel port scanner with a USB
  > interface tacked on. Any suggestions as to where to start...?

  Look at the following project.

  http://hp4200-backend.sourceforge.net/

  It does not use the exact same USB-EPP bridge, but they might be very
  similar, or perhaps, identical in function.

  Good luck!

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