HP LaserJet Pro 400 Service Manual - Page 187

Communication error. Description A fax communication error occurred between the product and the sender or receiver. Recommended action Allow the product to retry sending the fax. Unplug the product telephone cord from the wall, plug in a telephone, and try making a call. Connect the product phone cord into a jack for another phone line. Try a different phone cord. Set the Fax Speed option to the Slow (V.29) setting or disable the Fast (V.34) setting. Turn off the Error Correction feature to prevent automatic error correction. NOTE: Turning off the Error Correction feature can reduce image quality. Print the Fax Activity Log report from the control panel to determine if the error occurs by using a specific fax number. If the error persists, contact HP. See www.hp.com/go/LJColorMFPM375 or www.hp.com/go/ LJColorMFPM475 or the support flyer that came in the product box. Cyan Cartridge Low Description The toner cartridge is nearing the end of its useful life. Recommended action Printing can continue, but consider having a replacement supply on hand. Cyan in wrong position Description The toner cartridge is installed in the incorrect slot. Recommended action Make sure that each toner cartridge is installed in the correct slot. From front to back, the toner cartridges are installed in this order: black, cyan, magenta, and yellow. Cyan Very Low Description The toner cartridge is at the end of its useful life. When a color toner cartridge becomes very low, the product prints in black only to prevent fax interruptions. When you choose to replace the very low toner cartridge, color printing resumes automatically. ENWW Troubleshooting tools 161