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HP Color Laser 178, 179 Printers - Replacing a TCU (Toner Collection Unit)

This document is for HP Color Laser MFP 178nw, 178nwg, 179fnw, and 179fwg printers.

A toner collection unit (TCU) collects waste toner during printing. When a Replace/Install Waste Toner Tank message displays on the printer control panel, the TCU is full and needs replacing. Avoid reusing a TCU to prevent print quality issues.

note:
HP recommends having a replacement TCU available to avoid possible printing delays.

Purchase a replacement toner collection unit

The following table displays the TCU that works with your printer.

Country/Region	Part number
China	5LX86A
Asia Pacific and Japan Europe, Middle East, and Africa Latin America, North America	5KZ38A

Purchase replacement cartridges and other supplies from the HP Store or local retailers.

Replace a toner collection unit

Replace the TCU when a Replace/Install Waste Toner Tank message displays.

Turn off the printer, and then disconnect the power cord from the wall socket or power strip.

warning:
You must disconnect the power cord before reaching inside the printer to avoid risk of injuries or electric shock.
Open the toner cartridge access door.
Grasp each side of a toner cartridge, and then pull out the toner cartridge to remove it. Repeat this step to remove all the toner cartridges. Set each toner cartridge aside.
Remove the TCU. Carefully set the unit aside on a flat, solid surface to avoid spilling the waste toner.
Remove the new TCU from its package. Remove the cap from the new unit, and then attach the cap to the old unit.
TCU cap from the new unit

TCU cap attached to the old unit
Recycle the packing materials, and then discard the old TCU.
Insert the new TCU.
Reinstall the toner cartridges.
Close the toner cartridge access door.
Reconnect the power cord to the wall outlet or power strip, and then turn on the printer.