Spitting out blank pages with print and copy. black imaging unit may be stuck?

Blank print?

First u need to check Process unit, make sure there is image formed on the drum surface

If Process unit OK, u need to check T/S charging unit...

You don't say what model your fax is.

In general. If when copying you get a Full BLACK page printed then the scanner lamp is not lit. As no light is reflected into the image scanner, it interprets this as BLACK information so therefore only black is printed. Look into the ADF while the document is being scanned and I bet you will see no green light at all. A new Contact image sensor should cure it.

Symptom: Black or Blank image while copying or scanning.
Part suspect rating: Scan head..70%
Scan head cable...25%
Formatter...5%
For tech guys only: Remove ADF unit from the printer, remove both side covers of adf, remove & replace scan head, check...
Replace scan head

Have you open closed the front door to clear code? have you replaced the black image unit? Not the black toner but the image unit Black.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Try to print a self test page from the printer directly using the below steps....

1. Make sure the printer is loaded with plain, white paper. Remove any special or colored paper.
2. Press Setup on the front panel of the product.
3. Press 1 , to select Print Report , then 5 , to select Self Test .After you have the report printed, check for 4 horizontal color bars in that report, the first color should be the the black one, if the black one is missing, issue seems to be with black cartridge, that may be the reason the printer spits out blank paper, try to replace the black cartridge and then copy if it copies or not.

Hello sir;The streak line from printing also should be from copy, because the line come from imaging unit, check the meter count if close to or over 50,000 then replace drum and drum blade, it will take care the problem.
The brother printer you need to replace imaging unit( drum unit).

You may need an imaging unit. VERY expensive.

laser scanner unit faulty.

Most likely your drum unit is worn out. If it reaches the yield of 50k or more, it starts to develop grooves in the drum and toner gets stuck in the groove and is applied to your pages. If you have a service company, they can change it for you. We sell the drum for $220.

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.