Ricoh B2473870 (B247-3870) nabíjací predpäťový valec

In a busy office, the Ricoh Aficio MP 3350 suddenly starts producing faded prints with uneven toner coverage. The culprit is often a worn charge bias roller. This genuine Ricoh B2473870 bias roller restores the uniform electrical charge on the photoconductive drum, ensuring crisp, consistent output on every page. It is the exact component specified for your machine, not a generic substitute.

Key specifications

• Product type: Charge bias roller
• OEM status: Genuine Ricoh part
• Device compatibility: Multifunction printer (MFP), copier
• Printer technology: Laser / LED (electrophotographic)
• Primary function: Applies uniform electrical charge to the photoconductive drum
• Component location: Imaging unit / drum unit
• Material: Conductive rubber / polymer
• Colour: Black
• Installation type: Internal component, typically user-replaceable or service technician
• Condition: New
• Brand compatibility: Ricoh, Lanier, Savin, Gestetner, Nashuatec, Rex-Rotary
• Compatible series: Ricoh Aficio MP Series
• Replaces part number: B247-3870
• Purpose: Ensures proper toner transfer and image quality
• Compatible models (partial list): Ricoh Aficio MP 2550, MP 2851, MP 3350, MP 3351; Lanier LD425, LD428, LD433, LD438; Savin C2525, C2828, C3333, C3838

Why choose it

Using a genuine Ricoh bias roller guarantees the correct electrical properties and dimensional fit. Aftermarket rollers may cause arcing, uneven charging, or premature drum wear. This part is manufactured to Ricoh's exact specifications, so your prints come out clean and sharp, and your imaging unit lasts longer.

Ideal use cases

• Replacing a worn or damaged charge bias roller in Ricoh Aficio MP 2550/2851/3350/3351 series MFPs
• Servicing equivalent Lanier, Savin, Gestetner, Nashuatec, and Rex-Rotary models
• Preventive maintenance during drum unit rebuilds
• Restoring print quality after faded or blotchy output

Good to know

Installation is straightforward for a trained technician or experienced user. Always power off and unplug the machine before opening the imaging unit. Handle the roller by its ends to avoid contaminating the conductive surface. This part is new and comes in Ricoh packaging.