My richo ft4822 copier is now printing blank copies. Before this, image density was faint even if you set to maximum density.

There are a few potential reasons why your copier might be printing faint copies:

1. Low toner levels: If the toner in your copier is running low, the copies it produces may appear faint or light. To fix this issue, you will need to replace the toner cartridge.
2. Dirty or clogged nozzles: If the nozzles on your copier's print head are dirty or clogged, they may not be able to produce a full, even layer of toner on the page. To fix this issue, you can try cleaning the nozzles or running a nozzle check to see if any are clogged.
3. Wear and tear on the print head: If the print head on your copier is worn or damaged, it may not be able to produce copies with the same intensity as a new or well-maintained print head. In this case, you may need to replace the print head to fix the issue.
4. Incorrect print settings: If the print settings on your copier are set to a low quality or low density setting, the copies it produces may appear faint. To fix this issue, you will need to adjust the print settings to a higher quality or density setting.

If none of these steps resolve the issue, it is possible that there is a malfunction or defect with the copier that will need to be addressed by a professional. In this case, you may want to consider contacting the manufacturer or a customer service representative for further assistance.

Have you by any chance set the print properties to DRAFT? that will print a light copy to save ink and looks like what you describe. goto printer properties and select the correct mode or default.

Problem Cause Solution Colored lines appear. The exposure glass or scanning glass is dirty. Clean them. See "Maintaining Your Machine", About this Machine . Copies appear dirty. Image density is too high. Adjust the image density settings. See "Adjusting Copy Image Density", Copy and Document Server Reference . Copies appear dirty. Auto Image Density is not selected. On the control panel, select [Auto Density]. The reverse side of an original image is copied. Image density is too high. Adjust the image density settings. See "Adjusting Copy Image Density", Copy and Document Server Reference . The reverse side of an original image is copied. Auto Image Density is not selected. On the control panel, select [Auto Density]. A shadow appears on copies if you use pasted originals. Image density is too high.

• Adjust the image density settings. See "Adjusting Copy Image Density", Copy and Document Server Reference .
• Change the orientation of the original.
• Put mending tape on the pasted part.

The same copy area is dirty whenever making copies. The exposure glass, scanning glass, or ADF is dirty. Clean them. See "Maintaining Your Machine", About This Machine . The same copy area is dirty whenever making copies.

• The original that has already been printed is scanned.
• Original Type is set to [Text / Photo], and an original with text and photographs that can hardly be distinguished from each other is loaded.

On the control panel, press [Generation Copy], and then begin copying. Copies are too light. Image density is too light. Adjust the image density settings. See "Adjusting Copy Image Density", Copy and Document Server Reference . Copies are too light. A light copy may result when you use damp or rough grain paper. Use recommended paper only and be sure its storage environment meets the recommended temperature and humidity conditions. For details about recommended paper and the proper way to store it, see "Recommended Paper Sizes and Types" and "Paper Storage", About This Machine . Parts of images are not copied. The original is not set correctly. Set originals correctly. See "Placing Originals", Copy and Document Server Reference . Parts of images are not copied. The correct paper size is not selected. Select the proper paper size. Parts of images are not copied. Even if you place originals in the ADF correctly, margin of a few millimeters on all four sides of the original might not be copied. Use "Create Margin" function to reduce the image of its original size.
For details about missing image area, see "Missing Image Area", Copy and Document Server Reference . images appear only partially. The paper is damp. Use paper that has been stored in the recommended temperature and humidity condition. For details about the proper way to store it, see "Paper Storage", About This Machine . Black lines appear. The exposure glass or scanning glass is dirty. Clean them. See "Maintaining Your Machine", About This Machine . White lines appear. The exposure glass or scanning glass is dirty. Clean them. See "Maintaining Your Machine", About This Machine . White lines appear. The dustproof glass is dirty. Clean the dustproof glass. See "Cleaning the Dustproof Glass", About This Machine . Copies are blank. The original is not set correctly. When using the exposure glass, face the originals down. When using the ADF, face them up. A moir? pattern is produced on copies. Your original has a dot pattern image or many lines. Place the original on the exposure glass at a slight angle. Black spots appear on the copy of a photographic print. Because of high humidity, the photographic print has stuck to the exposure glass. Place the print on the exposure glass in either of the following ways:

• Place an OHP transparency on the exposure glass, and then place the print on the OHP transparency.
• Place the print on the exposure glass, and then place two or three sheets of white paper on it. Leave the ADF open when copying.

White stripes appear on the OHP. Fragments of paper are stuck to the OHP. Use a dry cloth to wipe any paper fragments off the back of the OHP. The image on the back side of duplex copies has mottled blank patches or is smudged. Missing patches and smudges are caused by moisture leaking from the paper.

• Do not install the machine in areas that are susceptible to low temperatures.
• Use paper that has been stored where temperature and humidity conditions meet the limitations we recommend. For details about the paper storage conditions we recommend, see "Paper Storage", About This Machine .
• Install the Optional anti-humidity heater. For details about the anti-humidity heater, contact your service representative.

When You Cannot Make Clear Copies

if you are tec guy?
do half test page test find any image created on catridge drum, if no image found then
Check laser scanner assembly shutter fully operating or not while catride access unit closed, if unable to check, remove the shutter from laser scanner assm
Increase toner density
set factory settings,
If image on drum no print on paper, check transfer roller, contacts, if dirty replace T.roller, no result replace Power supply board..

look my friend check that pcr charge is good and devolper charge is good and try to try check on gears behind machine that it's rolling or not

SC390 = Toner Density Sensor abormality

Possible causes:

• Poor concentration of developer
• Toner density sensor faulty

Are the prints/copies coming out ok? If the copies are very faint or heavily overtoned then changing the developer may cure the error code. If the copies look OK then you probably need to get the toner density sensor replaced by an engineer.

Hope this helps.

It could be that the print density setting is set too low. Adjust to higher density printing.

If the ink of the toner is not well distributed, remove the cartridge toner from the printer. Shaking it to redistribute toner more evenly will help..

Reset the printer
On the printer press the menu button until you reach MAINT.
Then press the item + button until you reach DRUM CT RESET. Then press select.

That will fix it.
Thank you for using Fixya
Alp

The PHOTO mode is for printing grayscale photographs. Printed letters using PHOTO mode may appear faint because PHOTO mode is optimized for halftones. See if there is a TEXT or LETTER print mode, and try printing on that setting. If printed letters are still faint, you may have to go into ADVANCED PRINTER PREFERENCES, and see if the TONER SAVE mode is on. If it is, turn TONER SAVE off. Also, try changing the DPI image density, or try other adjustments in the ADVANCED PRINTER PREFERENCES MODE.

It could possibly be your main charge assembly. If there is no charge on your drum, it can lead to blank copies.

C0F37: Abnormally high toner density detected by Black ATDC Sensor
Toner density that is 4 % or more higher than the target level is detected ten consecutive times during a print cycle, ATVC, or image stabilization sequence.

The sensor for this error is in the black imaging unit not the toner hopper. See the steps below. If that doesn't work then visit my website for contact and I will sell you a full service and or parts manual on CD.


Step
Check Item
Result
Action
1
Imaging Unit Bk is installed correctly.
NO
Check and correct ATDC



drawer CN of imaging unit Bk.
2
Each of Imaging Unit Bk contacts makes
NO
Clean or correct.

good contact.


3
ATDC Sensor harness is open-circuited.
YES
Change Imaging Unit Bk.