I have a problm that print are very unclear very lightprint then i change the setting of toner then i run automatictoner suply then print was same unclear and now print are erase,how i can solve?help

If you have replaced multiple components in your Brother 8510 printer, including the oven unit, laser unit, high voltage board, power board, and drum unit, but are still experiencing faded images, there are a few other potential causes and solutions to consider:
1. Toner Cartridge: Ensure that you are using a genuine and compatible toner cartridge for your Brother 8510. Low-quality or incompatible toner cartridges can result in poor print quality. Try replacing the toner cartridge with a new, genuine Brother cartridge to see if it resolves the issue.
2. Toner Density Settings: Check the toner density settings in the printer's software or control panel. If the density is set too low, it can result in faded or light printouts. Increase the toner density setting to see if it improves the print quality.
3. Cleaning the Corona Wire: The corona wire is responsible for transferring the toner to the paper. If it is dirty or contaminated, it can cause faded prints. Consult your printer's manual for instructions on how to clean the corona wire properly. Be careful when handling the corona wire as it is delicate.
4. Print Settings: Check the print settings on your computer or within the printer's software. Ensure that you are using the appropriate print quality settings and that any power-saving modes are disabled. Adjusting the print settings to a higher quality mode can enhance the print quality.
5. Contact Brother Support: If you have exhausted all the troubleshooting steps and the issue persists, it may be beneficial to reach out to Brother customer support or a qualified printer technician. They can provide further guidance or arrange for a professional inspection and repair of your printer.
Remember to follow the manufacturer's guidelines and safety precautions when working with printers and their components.

u change the power suply r hvt bord

1. Go to menu set as default.
2. Do color calibration.
3. Print PQ test pages, observe the colors, chk
4. Print demo page. chk
5. Print from different file/system..

There are several options as to the causes of this print defect. If the entire page background is grey or shaded, these are your most probable defects:

- Your toner cartridge is defective and spilling toner, in which cae you just swap it out.
- The high voltage power supply isn't getting the correct voltage to the rollers. (change the high voltage power suply)

If each letter seems to have a small shadow, then consider these options:

- IT could also be your toner cartridge
- The transfer roller might have trouble. Clean the Transfer Roller using a dry, lint-free cloth. DO NOT touch the Transfer Roller with your fingers. If the problem persists, replace the Transfer Roller Assembly.

Before any of this, check your settings. The print density and media type may cause errors like these if they are set improperly.

Hope this helps! Good luck!

A new laser could help, but you should make sure the toner save is turned off, it makes toner last longer by making light prints. Toner save is set in printer properties in the control panel

If you are using genuine toner, you probably have a bad power supply, make sure all the coronas are clean and the window for the laser is not covered in toner.

fuser and possibly laser scanner faulty

toner is like the catridge.. i think yu ve an laser printr.. yur toner is removed or else loose.. yu shd fix tat problm... by checkin yur toner.

I had a similar problem, it turned out to be a cheap toner cartridge. Replaced it with an HP cartridge and have had any problem since.

This could be a couple of different things. The first is that you are running out of ink or toner. Or you could have your toner save turned on. You can conserve toner using this feature.
When you set Toner Save to On, print
appears lighter. The default setting is Off.
1 Press Menu/Set, 1, 6, 1.
2 Press ▲ or ▼ to select On (or Off).
Press Menu/Set.
3 Press Stop/Exit.