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These instructions explain toner installation procedures for a Brother TN420/TN450 toner cartridge.
Introduction

Those who used HP/Canon ink jet printer might encounter some faults. How do we solve them?

What are the causes of printing stripes? How do we solve it?

I own an Brother-DCP-7060D Monochrome Multifunction Laser Printer. It can scan documents in 3 seconds and print extremely fast with great quality. It is easy to operate. Toner replacements are not very expensive. But I have to learn how to install brother tn420 toner cartridge in the printer. First of all, I found the cheapest place to buy printer ink on the website www.v4ink.com.
How to Install a Brother TN420 Toner. 

This year I bought a Brother printer, but a month after I used the printer I encountered the replacement problem of toner cartridges. The first question that happened to me is where is the cheapest place to buy printer ink. Then I googled it and finally found V4ink.com. I placed an order of brother tn 660 on the V4ink website. The delivery service is good so that several days later I received the product. It is the first time for me to replace printer ink.