Inktoneram Compatible Drum Units Replacement for Brother DR221 DR-221CL HL-3140CW HL-3150CDN HL-3170CDW HL-3180CDW DCP-9020CDN MFC-9130CW MFC-9330CDW MFC-9340CDW (BK-DR, C-DR, M-DR, Y-DR,4PK) (****IMPORTANT MUST READ BEFORE PURCHASING****This product IS A DRUM UNIT ONLY. TONER CARTRIDGE IS NOT INCLUDED AND SOLD SEPARATELY. Please DOUBLE CHECK what you need is a DRUM UNIT before purchasing. ) This package contains: 4 Inktoneram Replacement DRUM UNITS to replace Brother DR-221CL Drums ( 1 Black , 1 Cyan , 1 Magenta , 1 Yellow ) . (THIS IS A COMPATIBLE Replacement PRODUCT ONLY. THIS IS  NON-OEM .) IMPORTANT NOTE: For all the printer models, it is REQUIRED to reset the drum counter for every new drum installed. Please refer the 'Product Description' section below for INSTALLATION & DRUM COUNTER RESET INSTRUCTIONS by scrolling down. If any further problems, please contact seller by clicking "Ask a question" on the seller page anytime for assistance. Page Yield : 15,000 Pages / Drum at 5% coverage Printer Compatibility: Brother DCP: DCP-9020CDN, Brother HL: HL-3140CW HL-3150CDN HL-3170CDW HL-3180CDW, Brother MFC: MFC-9130CW MFC-9330CDW MFC-9340CDW Warranty: Our Compatible Inktoneram Replacement drum units to replace Brother DR221CL drum units are manufactured under strict ISO-9001 standards. They are excellent economical alternatives to the high-cost OEM Brother DR221CL drum units. These cost-effective drum units will provide high quality prints that meet OEM standards and are guaranteed against defect. Our compatible Replacement drum units to replace Brother DR221CL come with a 90 day 100% money back guarantee. 1 Black drum unit 3 Color drum units High Yield Replacement Drum Unit for Brother DR221 High page yield: 15,000 pages at 5% Page Coverage Manufactured under strictest quality standards in ISO-9001 with professional quality control &amp; inspection Produce crisp and clear prints suitable for everyday printing Simple to install and will not require assistance from a technician Brother DCP-9020CDN Brother HL-3140CW Brother HL-3170CDW Brother HL-3180CDW Brother MFC-9310CW Brother MFC-9330CDW Brother MFC-9340CDW Make sure that the machine is turned on. Open the top cover until it locks in the open position. Take out the toner cartridge and drum unit assembly for the color shown on the machine&#039;s display. Push down the green lock lever and take the toner cartridge out of the drum unit. Unpack the new drum unit, and pull off the protective cover. Put the toner cartridge firmly into the new drum unit until you hear it lock into place. If you install the cartridge correctly, the green lock lever on the drum unit will lift automatically. Clean the corona wire inside the drum unit by gently sliding the green tab from left to right and right to left several times. Press X (Cancel) to interrupt the error. Press TOOLS/Settings (Picture of a wrench and screw driver) Press All Settings Press the Up or Down arrow key to display Machine Info.. Press Machine Info.. Press Parts Life. Touch the dial pad area to light up the LEDs. Press # until the machine&#039;s display message changes. Press the color of the drum unit you replaced. Press Yes. Press<span class="a-text-bold">Up</span>arrow key while holding down<span class="a-text-bold">Go</span>on the machine&#039;s control panel. Press<span class="a-text-bold">Up</span>or<span class="a-text-bold">Down</span>arrow key to display<span class="a-text-bold">Drum Unit</span>. Press<span class="a-text-bold">OK</span>. Press<span class="a-text-bold">Up</span>or<span class="a-text-bold">Down</span>arrow key to display the color of the drum unit that you replaced. Press<span class="a-text-bold">OK</span>. Press<span class="a-text-bold">Up</span>arrow key for<span class="a-text-bold">Reset</span>to reset the drum counter. Store in a cool dry place and keep out of direct sunlight Please install and use immediately after opening Reinstall the drum unit if it does not work because often the toner is not locked in correctly with the drum Do not touch opc drum Please handle with care<br>