HP LaserJet 9000 Printer series - Manual (Page 130)

Chapter 5 Problem solving 130
Correcting output quality problems
Preventing wrinkles on envelopes
If envelopes are wrinkled when printed, first ensure that you are using supported types of envelopes. Then,
use the following procedure to move the fuser levers to the higher position while printing the envelopes.
To prevent wrinkles on envelopes
1 Open the left door (If an optional output device is installed, first
slide it away from the printer).
WARNING!
Avoid touching the adjacent fusing area. It can be HOT .
2 Locate and lift up the two blue levers.
3 Close the left door.
When finished printing the envelopes, return the fuser levers to the
down position for standard paper types.
CAUTION
Failure to return levers in the down position for standard paper types
might result in poor print quality.
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