I am working on a machine (TASKalfa 420i has about 182,000 pages printed so far) that has dots while scanning through the document processor. The dots appear only while scanning, and not when copying. The dots are throughout the whole page. Imagine old comics that were illustrated with dots. Sort of like that except a lot smaller dots on the whole page. Scanning is set to send to email. There is a 3500i on the same network that also scans to email same as this machine but has no problems. This is what I have done so far but nothing has fixed the issue so far.
Since the new ISU did not fix the problem, the old one was put back in and left with the following scan settings.
Attached is a scan of a print of what was scanned. (Machine is not at my location and I was not able to scan straight to my own email)
- I ran maintenance mode
- Ran U425 & U411
- Flushed the firmware
- Replaced ISU
- replacing the ISU resulted in having only the top half of the page with dots. The bottom half was clear
- Cleaned slit glass
- Cleaned white reference strip under plate glass
- Cleaned all mirrors
- (all cleaning was with a dry cloth towel)
- Changed scanning resolution from 200x200 dpi to 600x600dpi
- Changing the resolution resulted in finer or smaller dots on the page. Imagine zooming out on the page.
Since the new ISU did not fix the problem, the old one was put back in and left with the following scan settings.
- File Format : PDF
- Resolution : 600x600dpi
- Quality : Text + Photo
Attached is a scan of a print of what was scanned. (Machine is not at my location and I was not able to scan straight to my own email)
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