I recently bought a used Howtek D4000 drum scanner. I scanned two slides which looked fine. On the following scans I started to notice "vertical streaks" over the whole image. They are aligned with the drum rotation, so they are not related to the lead screw!?
I added a sample with some sharpening to enhance the effect. These streaks are visible all over the image.
It took me one month to get my hands on the lubricant for the lead screw, the scanning material and fitting belts - Aztek send a holiday notification mail, I repeated my request after the holidays, but still no answer...
- I cleaned the scanner
- I used the clean and nearly-new drum
- put the slides on different positions of the drum
- replaced the belt (it was lengthened)
- lubricated the lead screw
But I still have these streaks! I'm going crazy! What else can I do?
I don't know what to do! Help! Thanks....
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