This document is for HP Color Laser MFP 178nw, 178nwg, 179fnw, and 179fwg printers.
note:The toner supply level and the percentage of toner cartridge life remaining provide estimates for planning purposes only. When the toner level is low, consider having a replacement toner cartridge available. You do not need to replace toner cartridges until the print quality becomes unacceptable.
warning:You must disconnect the power cord before reaching inside the printer to avoid risk of injuries or electric shock.
caution:Do not touch the imaging drum. Fingerprints on the imaging drum can cause print quality problems.
note:Keep a print sample that shows the problem. If the printer, imaging drum, or toner cartridges are replaced under warranty, the support agent might request the print sample.