sane-project-website/old-archive/2001-06/0213.html

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<H1>Re: Hardware details for FB630U</H1>
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<STRONG>From:</STRONG> Stefan Nilsen (<A HREF="mailto:stefan.nilsen@telia.com?Subject=Re:%20Hardware%20details%20for%20FB630U&In-Reply-To=&lt;01061323502102.00667@wale&gt;"><EM>stefan.nilsen@telia.com</EM></A>)<BR>
<STRONG>Date:</STRONG> Wed Jun 13 2001 - 14:50:21 PDT
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<EM>&gt; After running out of options for trying to understand the interface, I
</EM><BR>
<EM>&gt; decided to pull my scanner to pieces earlier this evening. Canon had done
</EM><BR>
<EM>&gt; a good job with one-piece moulded plastic and unnecessary amounts of glue,
</EM><BR>
<EM>&gt; but I got the glass off and removed the PCB cover without breaking
</EM><BR>
<EM>&gt; anything. And yes, they've gone out of their way to cut corners.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Findings:
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; (1) LM9830 chip, courtesy of National Semiconductor (note: parallel port
</EM><BR>
<EM>&gt; chip).
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; (2) GL640 USB-to-parallel convertor. Docs are fairly inpenetrable, though
</EM><BR>
<EM>&gt; I hoped someone here might have come across this chip before: it's a
</EM><BR>
<EM>&gt; standard one used in printers, IIRC. Anyway, here's the link:
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; <A HREF="http://www.genesyslogic.com/gl640ucb.htm">http://www.genesyslogic.com/gl640ucb.htm</A>
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; (3) One other large chip (an SBT, SB61H1024AS-12), which looks like RAM,
</EM><BR>
<EM>&gt; plus other small ones (I've noted numbers and taken photos of the PCB for
</EM><BR>
<EM>&gt; posterity).
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; So it looks like we're dealing with a parallel port scanner with a USB
</EM><BR>
<EM>&gt; interface tacked on. Any suggestions as to where to start...?
</EM><BR>
<P>Look at the following project.
<BR>
<P><A HREF="http://hp4200-backend.sourceforge.net/">http://hp4200-backend.sourceforge.net/</A>
<BR>
<P>It does not use the exact same USB-EPP bridge, but they might be very
<BR>
similar, or perhaps, identical in function.
<BR>
<P>Good luck!
<BR>
<P><PRE>
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