HP color laserjet 4500 Manuale Utente

Chapter 1 Troubleshooting control panel messages

 EN

Always turn off, then unplug, the printer before servicing. Current is 
present in the DC power supply whenever the printer is plugged in.

The customer is responsible for ensuring that the maintenance units 
are in good condition.

Before troubleshooting any specific printer problem, check the following:

•

Has the printer been maintained on a regular basis?

•

Are all of the maintenance units within their rated life?

•

Is the customer using media as specified in Chapter 5, “Media 
specifications” and the HP LaserJet Family Print Media Guide?

•

Is the media stored correctly and within environmental limits?

•

Is the printer installed on a solid, level surface?

•

Has the line voltage been checked to make sure that it does not vary 
more than 20 percent from the nominal rated value specified on the 
power-rating label?

–

Large motors used near the printer can cause temporary voltage 
changes.

•

Is the operating environment within the parameters listed in the 
printer service manual?

•

Is the printer protected from substances such as office cleaning 
materials and the ammonia gas that is produced by diazo copiers?

•

Is the printer protected from direct sunlight?

•

Have all non-HP components (toner, typeface DIMMs, memory 
boards, and EIO cards) been removed from the printer?

Hewlett-Packard recommends the use of HP products in this printer. 
Use of non-HP products can cause problems that require service not 
covered by the Hewlett-Packard warranty or service agreements.