This is a very simple problem, but require much skill.
You must disassembly the scanner unit, remove any screw you see (you need an no. 2 phillips screwdriver) and very gently remove the upper side (with glass) from the rest of scanner unit. Please note that is several plastic fasteners to be disposed.
after you remove the glass (with a plastic frame) you get a small tissue of cotton and soaking with an windows cleaner solutions. Gently clean the BOTH surfaces of scanner glass.
For assembly follow the reverse procedure.
Beware to the glass, it has only 3 mm thickness. Don't broke!
Like I sad: simple problem, but require much skill. If you think is to difficult for you, please go to the service.
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Lines on scanned and copied documents is usually caused by something on the scanner glass such as ink, correction fluid or trash. Open the top of the printer and clean the scanner glass surfaces with windex and paper towels. See this article for more details:
Open the scanner cover and you will see two glasses. One long and thin and the other larger than an A4 sheet of paper. The long thin glass is used to scan thru the adf and the larger glass is for flatbed scanning. As your lines are from the adf scanning, you will see tippex on the long thin glass. just clean it off and all will be well. Clean the flatbed glass as well while you are doing the job on the adf glass.
look at the scanner glass. It probably has some dust specs on it, clean it . Also clean the small glass toward the left of the scanner glass. If the dust specs are under the small glass, you can carefully remove the glass and clean it.
The scanner glass which reads your document has something on it (whiteout usually). Carefully lift up the top cover. There should be a thin piece of glass on the left hand side. Carefully clean it with rubbing alcohol. Shine a flashlight on this glass to really get a good look at the glass. You may have to scrape whatever is on the glass with your fingernail. DONT BREAK THIS GLASS.
HI As soon as the printer prints the test page or alignment page place it
on the scanner glass (Place the printed side down) before that Examine
the scanner glass and white scan backing. Clean the scanner glass and
scan backing if they are not clean. To clean the scanner glass and scan
backing, use a soft cloth towel slightly dampened with clean water.
After That press scan on the printer button panel it will resolve your issue.
Try to double check it by turning it off and turning the printer back
on after 2 minute's. If still the problem exists call HP Total Care 800
- 474 - 6836 if you are from US/Canada.
) Lift the lid of the product.
2) Place the top of alignment page face down in the right front corner of the glass.
3) Place the alignment page face down
4) Close the lid.
5) Press the Start Scan button.
6) The Power button light will blink during the alignment process.
7) After the Power button light stops blinking, alignment is complete.
The line doesn't show up when you print, right? If you are feeding your original from the document feeder when you get the line, there is most likely Wite-Out, dirt or other debris on the thin strip of glass to the left of the main scanner glass. You'll probably be able to see whatever is causing the line and clean it off, but if you can't see anything, try cleaning that glass strip with isopropyl alcohol and a lint-free rag.
If you get the line when copying off of the main scanner glass, there is dirt or dust on your scanner's mirrors, lamp, or lens. To get rid of the line, you'll have to take the glass and surrounding covers off and blow compressed air onto the mirrors and other pieces of the optics assembly. If that doesn't get rid of the line, wipe the mirrors down with a dry lint-free rag.
You need to poiwer cycle after cleaning as the scanner only calibrates during power up. If all is clean, even the white bar over the small glass assembly, and you power cycle the machine and it's still there, you will need a new scan assembly.
Does the line show up on PRINTS FROM YOUR COMPUTER also, or only when SCANNING A DOCUMENT? If the line is only from scanned documents, the SCAN GLASS has something stuck on it. The SCAN GLASS is a GLASS **** located under the ORIGINAL FEEDER. It is NOT the plate of glass you place the original on . Look UNDER the original feeder for a scrap of paper stuck in the optical path of the GLASS ****, and remove the scrap, or CLEAN THE SCAN GLASS IF CORRECTION FLUID, INK, ETC ARE STUCK ON IT. If the line shows up on ALL prints, your CHARGE CLEANING SLIDER located in the IMAGING (DRUM) UNIT must be slid all the way to one end of the charger, OR IT WILL CAUSE A BLACK LINE ON ALL PRINTS. Otherwise, the IMAGING UNIT may need to be cleaned or replaced. Toner smudges on the drum would indicate need for cleaning or replacement.