Brother HL-820 Service Manual page 93

F-1 Double feeding
Possible cause Step
Paper 1
Separation pad 2
F-2 Wrinkles
Possible cause Step
Paper 1
2
Fixing unit 3
entrance guide
Fixing unit 4
Check
Is paper of a recommended
type being used?
Is the surface of the separation
pad worn out?
Check
Is paper of a recommended
type being used?
Is the wrinkle problem solved if
new paper is used?
Is the entrance guide dirty?
Is the pressure roller dirty?
IV-26
Result Remedy
No Instruct the user to use
recommended types of paper.
Yes Replace the MP sheet feeder.
Result Remedy
No Instruct the user to use the
recommended types of paper.
Yes Instruct the user how to store
paper so that it does not
absorb moisture.
Yes Clean the entrance guide.
Yes Clean the pressure roller
No Replace the fixing unit.