Preliminary operating checks Make sure that the conditions in the following lists are met before troubleshooting a specific MFP problem. Installation environment: The MFP is plugged in, and specified power is delivered. The MFP receives maintenance on a regular basis. The scan engine is securely installed on the print engine. The customer is using acceptable print media. The MFP is positioned on a solid, level surface. The line voltage does not vary more than 10 percent from the nominal rated value specified on the power rating label. The operating environment for the MFP is within the temperature and humidity specifications. The print engine is not exposed to ammonia fumes.
The MFP is not exposed to direct sunlight. Non-HP components (such as refilled print cartridges, font DIMMs, and memory DIMMs) are removed from the MFP. Note Sudden changes in MFP environment can cause image defects and media-handling problems. Make sure the MFP is not exposed to direct sunlight or to heating or cooling vents. Allow time for the MFP and media to acclimate whenever changing environments (for example, moving from a cold environment to a warm one). Acclimation can take from 3 to 24 hours depending on the ambient conditions. Document checks The selected tray contains media that has been properly loaded and adjusted. The selected tray contains the correct amount of media.
The recommended print media is in use. The document is not damp. The document is not dirty. Unit checks Make sure the ADF feeder is closed. Make sure the ADF unit is closed. C8523-90921 Troubleshooting process 191