[sane-devel] Canon LiDE 90

[Guillaume Gastebois]

OK, but via which register is it programmed. I find nothing in GL842 datasheet
for frontend.

regards
Guillaume

Selon Pierre Willenbrock <pierre at pirsoft.dnsalias.org>:

> Guillaume Gastebois schrieb:
> > Hello,
> >
> > OK,
> > I open my LiDE 90 (very hard not all to destroy...).
> > I find these IC's :
> >
> > 	GL842 (Genesys well known scanner chip)
> > 	GLT44016P (SO40 RAM)
> > 	BU6574 (TSSOP20 ????????????)
> > 	VHC175 (TSSOP16 quad flip flop)
> > 	VHC08 (TSSOP16 quad and)
> > 	LB1940 (TSSOP20 constant current driver)
> > 	LM324 (SO14 quad op amp)
> > 	1733 (TO-263 regularor)
> >
> > Appart the BU6574 (I dont find what it is) I dont find any analog
> > frontend. Is it possible that this chip is located with leds (seems very
> > hard to open.....)
> >
>
> I don't know where the analog frontend may be found. There are arguments
> for both positions.
>
> The BU6574 has enough pins for the job. Did you look at the back of the
> pcb?
>
> In the documentation i found for one cis sensor, the glassy sensor
> itself contains just the ccd row and the leds. There may be a small pcb
> on the sensor bar, carrying the analog frontend.
>
> But you really don't need to look for the chip and possibly destroy your
> scanner on the way.. Let's first try to figure out how it is configured
> from an usb log.
>
> Regards,
>   Pierre
>