Adjusting the Fixing Level for Envelopes
When printing on envelopes, if their flaps are glued (which should not) or toner fixation is poor, follow the procedure below.
1
Press 
(Settings/Registration) 
<Adjustment/Maintenance> <Adjust Image Quality> <Special Processing> <Adjust Fixing Level for Envelopes>.
(Settings/Registration) <Adjustment/Maintenance> <Adjust Image Quality> <Special Processing> <Adjust Fixing Level for Envelopes>.2
Select the fixing level for envelopes.
If the envelope flap is glued, set the fixing level to <Low>.
If toner is not fixed to envelopes well enough, set the fixing level to <High>.
3
Press <OK>.
This setting is only valid when printing on envelopes.