The Doctor Blade in laser printers, like the Samsung 1660 or 1043, is a critical component used in the toner cartridge. It helps in spreading and controlling the amount of toner that is applied to the drum during the printing process. The Doctor Blade helps ensure that the toner is evenly distributed and that excess toner is removed to prevent smudging and uneven printing.

The MLT-D115, D116, 103, D203 are all toner cartridges that are compatible with Samsung printers, such as the Samsung 1660 and 1043. These toner models come with a built-in doctor blade as part of their design, meaning you typically don't need to replace the doctor blade separately unless you're replacing the entire toner cartridge.

Doctor Blade Compatibility:

• MLT-D115: Compatible with Samsung Xpress SL-M2620, SL-M2670, and similar models.
• MLT-D116: Compatible with Samsung Xpress SL-M2020, SL-M2070, and similar models.
• MLT-D103: Compatible with Samsung Xpress SL-M2020, SL-M2070, and other small Samsung printers.
• MLT-D203: Compatible with Samsung Xpress SL-M2835, SL-M2875, and other similar models.

Maintenance and Replacement:

In most cases, if you're seeing printing issues like poor print quality, smudging, or streaking, you might need to replace the entire toner cartridge (which includes the doctor blade) rather than trying to replace the doctor blade on its own. If the toner cartridge is not performing well, it could be the toner, the doctor blade, or the drum that is worn out.

If you need specific instructions on replacing these cartridges or troubleshooting issues with the doctor blade, you should refer to your printer's manual for detailed guidance.