Brother MFC 9840CDW
How can I clean the belt unit, also can I clean the rollers on the toner cartridge

Experienced technical support provide their insights in answering this question :
Clean the belt with a dry paper towel. If there is something on the cartridge drums that doesn’t wipe off with a dry paper towel, dip it in alcohol. Make sure you dry it off real good afterwards.

How to Identify and Fix Common printer Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

The Brother printer belt unit, also known as the transfer belt or transfer unit, plays a crucial role in the printing process. Its primary function is to transfer toner from the drum unit onto the paper during the printing process.
A belt unit transfers the toner image onto paper. The belt unit is located under the black, yellow, magenta and cyan image drums.
A belt 3D printer replaces the conventional print bed and build surface setup with a conveyor belt, so the surface onto which the hotend extrudes material is constantly moving. Instead of moving the printhead or print bed by one step to proceed to the next layer, the belt moves fractionally along the Z-axis.
The belt unit is a consumable item that requires periodic replacement. After you have printed approximately 50,000 pages (letter or A4 size paper), the message “Replace Belt” will appear on the LCD display. NOTE:The actual number of printed pages will vary depending on the print jobs and paper you use.
This measurement is expressed in images per minute (IPM) or pages per minute (PPM). ESAT (Estimated Saturated Throughput) – Average print speed for all document sets excluding the first set. This measurement is expressed in images per minute (IPM) or pages per minute (PPM).
Clean the belt unit using the dry soft lint free cloth by wiping away any excess or spilled toner. 10. To clean the entire belt unit, rotate the belt using the gear with grooves/cutouts located toward the back right hand side. Also, clean the frame of the belt unit if you see toner on it.
How Conveyor Belt Systems Work. In a typical conveyor belt system, a belt forms a closed loop and stretches across two or more pulleys. This enables it to rotate continually. One of the pulleys (the drive pulley) moves the items from one place to another.
A conveyor belt works by using two motorized pulleys that loop over a long stretch of thick, durable material. When motors in the pulleys operate at the same speed and spin in the same direction, the belt moves between the two.
Simply put, roller conveyors are a form of conveyor belt that utilizes rollers – evenly-spaced rotating cylinders – to allow objects to skate across its surface. They move material from one place to another destination, and often leverage gravity or implement small motors to do so.
A gait belt or transfer belt is a device put on a patient who has mobility issues, by a caregiver prior to that caregiver moving the patient. Patients may have problems with balance and a gait belt may be used to aid in the safe movement of a patient, from a standing position to a wheelchair, for example.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Belt Unit
ANSWER : Clean the belt with a dry paper towel. If there is something on the cartridge drums that doesn’t wipe off with a dry paper towel, dip it in alcohol. Make sure you dry it off real good afterwards.

Read Full Q/A … :

Brother MFC 9840CDW

replace with new imaging unit error
ANSWER : samsung clp 365w firmware

Read Full Q/A … :

Brother MFC 9840CDW

DesignJet 1050C belt replacement
ANSWER : There is a good article about the resistance check for the HP Designjet 1050C after replacing or reconnecting the trailing cable. The article has a picture showing all 3 types of test points that were used with this plotter. Note: The very early Designjet 1050C main logic boards had no test points at all. If the dread 0B0006 comes up on this board, all you can do is put a 2A fuse in around F7 or get a new board (non-Plus) The 1050C Plus board is also available but the Error 0B0006 can usually be cured by simply replacing the glass fuse.

Read Full Q/A … :

Brother MFC 9840CDW

Scanner unit lid won't close
ANSWER : Try gently rocking it up and down. Do not use any force whatsoever or you’ll break the hinges.

Read Full Q/A … :

Brother MFC 9840CDW

Epson 630 close the scanner unit error
ANSWER : how to fix may epson printer

Read Full Q/A … :

Brother MFC 9840CDW

Belt end of life
ANSWER : Reset it and don’t worry about it. http://www.manuals365.com/swf/brother/um_mfc_9970cdw_en_2754.html?page=107

Read Full Q/A … :

Brother MFC 9840CDW

Canon MP530 – 6A00 Purge Unit?
ANSWER : I just took apart my MP530 which produces the 6A00 error, and cleand the wiping pads, rubber blades and everything I could reach from the purge unit. I also cleaned the print head. The waste ink level in the EEPROM is 66%.

Read Full Q/A … :

Brother MFC 9840CDW

Cannot remove toner/drum unit
ANSWER : I don’t know how they manage to stuff like that. The front lid lifts the drum/toner unit up on each side. I imagine what is happening is that the left side isn’t lifting and you’re trying to slide it out crookedly. Try lifting it by the handle so that both sides are up all the way and then pull it out.

Read Full Q/A … :

Brother MFC 9840CDW