Epson scanner auto doc feeder gives vertical lines?

[Sparky]

Epson Perfection 1640SU Office scanner with Auto Doc Feeder (ADF). The ADF
plugs into the back of the scanner via a DIN-8 plug. (The ADF is model EU-34,
pn B813222.)

The scanner will scan documents on the flat bed glass with no problems.

When the ADF is used, the paper feeds through the rollers smoothly. No jams
or other feed problems.

The resulting scan in ADF mode is all vertical lines. I tried different
resolutions and other settings. Also tried different applications. Same
results.

A tech at a local Epson authorized repair facility said that this is a common
failure. There is a calibration strip at the "home" position on the bottom
side of the flat bed glass. Over time this white strip changes to off-white
and when calibration is done at power-on, incorrect calibration results.

The Epson tech says that this is a quite common failure mode and he does many
of these repairs on several different models. (I didn't ask if it was common
to other than Epson.)

How does this calibration work such that it succeeds for flat bed scans but
fails for ADF scans? Can someone explain?

Thanks.

 

[Bennett Price]

I don't know the answer to your question but I've got the same ADF which
was working perfectly when the scanner died. If you want it, you
can have it for the cost of shipping. (I'd guess that would be ~ $10-20).

If Interested Respond by email - remove NOSPAM from my address.
On 2/4/2010 12:54 AM, Sparky wrote:

Epson Perfection 1640SU Office scanner with Auto Doc Feeder (ADF). The ADF
plugs into the back of the scanner via a DIN-8 plug. (The ADF is model EU-34,
pn B813222.)

The scanner will scan documents on the flat bed glass with no problems.

When the ADF is used, the paper feeds through the rollers smoothly. No jams
or other feed problems.

The resulting scan in ADF mode is all vertical lines. I tried different
resolutions and other settings. Also tried different applications. Same
results.

A tech at a local Epson authorized repair facility said that this is a common
failure. There is a calibration strip at the "home" position on the bottom
side of the flat bed glass. Over time this white strip changes to off-white
and when calibration is done at power-on, incorrect calibration results.

The Epson tech says that this is a quite common failure mode and he does many
of these repairs on several different models. (I didn't ask if it was common
to other than Epson.)

How does this calibration work such that it succeeds for flat bed scans but
fails for ADF scans? Can someone explain?

Thanks.