6 Chapter 1 Troubleshooting control panel messages EN
Pre-troubleshooting checklist
WARNING!
Always turn off, then unplug, the printer before servicing. Current is
present in the DC power supply whenever the printer is plugged in.
Note
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?
CAUTION
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.
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