HP LASERJET 4100 TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS
REMANUFACTURING THE
HP LASERJET 4100 TONER CARTRIDGE
By Mike Josiah and the Technical Staff at UniNet
© 2011 UniNet Imaging Inc. All trademark names and artwork are property of their respective owners. Product brand names mentioned are intended to show compatibility only.
UniNet Imaging does not warrant downloaded information. Unauthorized sale, reproduction or distribution of this article is prohibited. For additional support, please contact
[email protected]www.uninetimaging.com
CHIP LOCATION
NOTE: These instructions were first written in 2003. As this was the first HP monochrome cartridge to use a chip, we included
quite a bit of information on them and their functions. This information is still current and we invite you to read through all of it.
The HP 4100 series printers are HP’s latest and greatest mid level machines to date. They are packed with new features and are
extremely fast. With a street price less than the 4000 series, they are going to become very popular.
This article is going to throw a lot of information at you. Since these cartridges, as well as the new technology used in both the
cartridges and the machines are sure to be with us a while, we have tried to fill it with as much information as we could.
The HP 4100 series of printers are based on a Canon 25 ppm, 1200 dpi engine. This engine uses the HP PCL-6 language, has a
first page out in under 15 seconds, and is able notify anyone you select when the toner is low, or if there is a problem if given
direct access to a TCP/IP network. There are two cartridges available for the 4100 series: the C8061A (6,000 page yield) and the
C8061X (10,000 pages). Although these new cartridges look like the 27A/X cartridges, they are different. As explained in more
detail later in this article, only a few 27x parts will work in these cartridges.
The 61A/X cartridges also have the distinction of being the first HP toner cartridges to use a chip. The chip on these cartridges
does not lock out the cartridge from being used; it monitors the toner usage. For example, once the machine sends a “toner out”
signal to the cartridge, the chip is set for “yes” for “toner out” as indicated on the supplies status page (more on that later).
When the cartridge is refilled, the display will show a “non-HP cartridge” message. The toner gauge will still work, but will no longer
be accurate, and the “toner low stop” will no longer function. In other words, the printer will continue to print even if there is no
toner left. The “toner low/out” warning on the display will not go out until a new HP cartridge is installed. It will be very important
to let your customers know this before they use your cartridges. Even when “new” HP cartridges are installed, it may take as many
as 20 pages before the new cartridge is acknowledged. If the chip is removed, the “toner low/out” warning will not show on the
display, but the machine will not recognize a “toner low” condition again until a new “HP” cartridge is installed. As per the HP
user’s guide, “When you use a non-HP cartridge, the printer is unable to report on the number of pages that can be printed with
the amount of toner left in the cartridge. The toner level estimate will only be an approximate percentage.” Also according to HP,
the “toner out” message will only come on when there is less than 1% of the toner left in the cartridge. This is much more
accurate than any previous system. Replacement chips are currently available, that should enable the “toner low” and usage
functions to work again.
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