> 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.
> (1) LM9830 chip, courtesy of National Semiconductor (note: parallel port
> (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:
> (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
> 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.
It does not use the exact same USB-EPP bridge, but they might be very
similar, or perhaps, identical in function.
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This archive was generated by hypermail 2b29 : Wed Jun 13 2001 - 14:43:29 PDT