HD Scanner blue previews

[trygveah]

One of our HP HD Scanners is behaving rather strangely.

Whenever we try to scan anything it shows up with a dark blue miscolouring. We can see at least some of the drawing in there, but most is 'washed over' with blue.

EDIT: Added a Screencap to illustrate the issue:

 

[SHThompson]

Is the scanner lamp near it's end of life?

Have you run a calibration lately?

[trygveah]

If you're wondering about the 'scanner messages' at the bottom, that's a message about it being 68 days since the last calibration.

This is because it won't recognise the darn sheet the way it behaves right now.

It may be a setting that's way off, but I can't find any way to reset it to 'factory defaults' or anything.

[Mikeg81 · Accepted solution]

Hi,

You are right, you will not be able to calibrate because of that.

The reason why the image looks like that is because :

1- The cameras are looking at the chassis, there is not enough light to give you a clear image and is not in the right angle.

2- Because the last calibration was not completed, the adjustment of the light/or light profile is set to the last successful parameter, since the light was brighter then, the image will look darker.

When you do a calibration the scanner wil adjust the light, colors and height of the cameras.

To adjust the height the cameras look at the ruler at the calibration sheet and use the motor on the cameras to move them

When there is not enough light the cameras lose track and will continue to "adjust", but what is actually doing is moving the camera all the way up or all the way down.

When this happens the arm moved by the motor get stock and it is not able to re adjust.

Here is what you need to do to correct the problem

1- Enter the Maintenance calibration option (But, DONT do the calibration) and select Erase Parameter blocks. This will erase the light profile, if you scan the calibration sheet after that, you will better a better image.

2- Adjust the height of the cameras manually

3- Access scan test 6, test 11 and do the alignments.

4- Run the maintenance calibration.

Please take in consideration that as a user you can only perform step 1, to continue with the rest you need to have some knowledge on the hardware and the scanner calibration tools handy in case that you have to adjust the cameras completely.

My recommendation, if you are located in the US, call HP and ask for a quote to repair the unit.

If you hire some one to repair the unit, make sure this person is really trained on the scanners.

If some one that is not trained on this scanners stars to touch the cameras you will be on a worse problem

[trygveah]

Erasing the parameter block did the trick.

Hopefully, it'll stay out of trouble for the next two months...