Remanufacturing the Lexmark CS720 and Ricoh C6003 Toner cartridges

By Mike Josiah and the Technical Staff at Uninet

These two different engines are the latest in our “Easy to do” series. Toner cartridges that are very simple to remanufacture, do not need to be tested and have a high profit potential.

Lexmark CS720

The Lexmark CS720 is based on a 40ppm 4800DPI color engine. The toner cartridge is a small rectangular cartridge that houses the toner and reset chip. There are three different yield cartridges available for this series.

The part numbers and list pricing for these toners are as follows:

Black 74C10K0 3000 pages $92.99*
Cyan 74C10C0 3000 pages $121.99*
Magenta 74C10M0 3000 pages $121.99*
Yellow 74C10Y0 3000 pages $121.99*

Black 74C1SK0 7000 pages $174.99*
Cyan 74C1SC0 7000 pages $199.99*
Magenta 74C1SM0 7000 pages $199.99*
Yellow 74C1SY0 7000 pages $199.99*

Black 74C1HK0 20000 pages $325.99*
Cyan 74C1HC0 12000 pages $312.99*
Magenta 74C1HM0 12000 pages $312.99*
Yellow 74C1HY0 12000 pages $312.99*

* Pricing as of December 1st 2018

Current machines released so far are:

CS720de
CS720dte
CS725de
CS720dte
CX725de
CX725dhe

Required Tools
Toner approved vacuum.
Small jewelers type common screwdriver
1.27mm Allen wrench
Heat gun

Required Supplies

• Toner for use in the CS720 toner cartridge: Choose the correct color and gram weight for your cartridge
• Replacement reset chip Choose correct color and yield
• 100% Silicon caulk (For leaks)

1) Vacuum the exterior of the cartridge
2) With the heat gun, remove the top label
3) Remove the fill plug from the toner cartridge. Dump the remaining toner.
4) Carefully vacuum/blow the cartridge clean.
5) Fill the cartridge with the appropriate color and amount of toner for use in the Lexmark CS720. Make sure you’re using the correct amount of toner to match your replacement chip.
6) Replace the fill plug and check for leaks. The plus are easily damaged. If there is a leak, seal the perimeter of the plug with 100% silicon.
7) Wipe the cartridge down to remove any remaining toner dust.
8) Take the 1.27mm Allen wrench and remove the upper small screw at the bottom of the cartridge.
9) Press in on the two tabs and release the chip holder.
10) With the 1.27mm Allen wrench remove the ship screw and chip.
11) Install a new chip and replace the screw.
12) Install the chip holder and screw.
13) Place a suitable label over the fill plug.

That’s it! You’re done!

Ricoh

The Ricoh C6003 is based on a 60ppm 1200 x 1200 DPI color engine. The toner cartridge is a long round tube type cartridge that houses the toner and reset chip.

The part numbers and list pricing for these toners are as follows:

• Black 841849 33,000 pages $56.95*
• Cyan 841852 22,500 pages $90.00*
• Magenta 841851 22,500 pages $90.00*
• Yellow 841850 22,500 pages $90.00*

* Pricing as of December 1st 2018

Current machines released so far are:

• MP C4503
• MP C4504
• MP C5503
• MP C6003
• MP C6004

Required Tools
Toner approved vacuum.
Small jewelers type common screwdriver

Required Supplies

Toner for use in the Ricoh C6003 toner cartridge: Choose the correct color and gram weight for your cartridge

Replacement reset chip: Choose correct color and yield

1) Vacuum the exterior of the cartridge
2) If present, unscrew the toner cover.
3) Pull up on the three small tabs on the outer port cover and remove the cover.
4) Press down on the spring loaded toner seal and vacuum the tube clean. (allow air in so the cleaning goes faster).
5) Press in the toner port seal with the bottle funnel and fill the cartridge with the appropriate color and amount of toner for use in the Ricoh C6003. Make sure you’re using the correct amount of toner to match your replacement chip. See Figure 19
8) Remove the small chip holder from the outer port cover by pressing in on the two tabs from the inside of the cover.
9) Remove the old chip.
10) Press the new chip in from inside the holder. Make sure it snaps in place.
11) Install the chip holder, make sure the tabs lock in place.
12) Clean the end of the tube and snap the port cover into place. Make sure the three tabs lock into the correct channel.
13) Screw the toner cover in place. (If available)

That’s it! You’re done!