Table 10. Basic troubleshooting # Verification steps Possible problems Solutions 3 Do engine tests and self-tests print? Print an engine test, which is explained on page 167. The engine test should print without paper-feed problems or print-quality problems. Also print a configuration report (See “Internal reports” on page 181.). Note The formatter must be connected to perform an engine test. Engine test is not successful. Replace the ECU. Control panel displays an error message. Consult the list of common messages in chapter 3 or the list of error messages in this chapter to correct the error. Media does not move smoothly through the printer paper path.
Isolate printer paper-path problems by performing a paper-path check, which is discussed later in this chapter. Poor print quality. See “Solving image defects” later in this chapter. 4 Is the copy function operational? Place the configuration report into the document feeder tray and copy it to the printer. The report should feed smoothly through the document scanner path and copies should print without print- quality problems. Poor copy quality. If the print quality from the internal tests was acceptable, but the print quality of the copies is not, clean the contact image sensor and the white roller, and then recalibrate the document scanner.
If, after performing the maintenance, the problem persists, replace the contact image sensor or document scanner. Clear the document scanner path of obstructions. Check photosensor to make sure that it operates correctly. If the problem persists, replace the document scanner assembly. 5 Does the product send a fax? Connect the phone line and verify the dial tone (using a hand set, if necessary). Attempt to send a fax. Media does not move smoothly through the document scanner path. The telephone line is not operational or the product is not plugged into the telephone line. Make sure that the product is plugged into a telephone line that you know works.
The telephone cable is plugged into the wrong connector. Try plugging the phone cord into the other connector. The product’s fax settings are set incorrectly. Review and reset the product’s fax settings. The LIU is not operational. Replace the LIU. 6 Does the product receive a fax? Use another fax machine to send a fax to the product. Too many telephone devices are plugged in, or telephone devices are not connected in the correct order Make sure that the product is the only device on the telephone line and try again to receive the fax. The product’s fax settings are set incorrectly. Review and reset the product’s fax settings. The LIU is not operational. Replace the LIU.
EN Basic troubleshooting 147