HP LaserJet Pro 400 MFP M425 - User Guide

Solve fax quality problems
Check the scanner glass for dirt and smudges
Over time, specks of debris might collect on the scanner glass and white plastic backing, which can affect
performance. Use the following procedure to clean the scanner.
1. Use the power switch to turn off the product, and then unplug
the power cord from the electrical socket.
2. Open the scanner lid.
3. Clean the scanner glass, the document feeder strips, and the
white plastic backing with a soft cloth or sponge that has
been moistened with nonabrasive glass cleaner.
CAUTION: Do not use abrasives, acetone, benzene,
ammonia, ethyl alcohol, or carbon tetrachloride on any part
of the product; these can damage the product. Do not place
liquids directly on the glass or platen. They might seep and
damage the product.
4. Dry the glass and white plastic parts with a chamois or a
cellulose sponge to prevent spotting.
5. Plug in the product, and then use the power switch to turn on
the product.
Check the send-fax resolution setting
If the product was unable to send a fax because the receiving fax machine did not answer or was busy, the
product attempts to redial based on the redial-on-busy, redial-on-no-answer, and redial-on-communication-
error options.
184 Chapter 8 Solve problems ENWW