Canon LBP-860 Service Manual page 191

Laser beam printer
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CEiApTER 6
step
Possible cause
Envelop?
I I31
Numberof t
14
enVt?lopCs
Envelop?
15
guide
1
1~
t&up roller
16
T - 2
Fixing and delivery section
Possible cause Step
~_~
Enlrance
1
guide
~~~ ; onI!!_
Delivery guide 2
Lower
fLwing
3
I-OlllT
P a p e r s e n s o r 4
X-Ill
Dellvely roller
6-44
Check
Are the proper envelopes being used in
the envelope feeder ?
Are there too many envelopes in lhe
1 ~~~~_____~
envelope feeder ?
Is the envelope guide exerting excess
pressure on the envelopes?
~~
Are any rollers worn or deformed?
Check
Is the entrance guide dirty?
Is the guide damaged or is there toner
~~~
Is the delivery guide dirty?
Is the guide damaged or is there toner
on it7
Is the lower fting roller dirty?
Does the sensor arm (fixing unit side,
printer side] move smoothly?
Result
4~.
--
Result
YES Clean the guide.
YES Clean the guide.
_ _ _ _ _ _ _ _ _ _ _ _
YES Clean the roller.
-_______
YES
N O
Procedure
!
Advise the user to only use
the recommended
envelooes.
number of envelopes.
set the envelope guide too
tightly against the
defective rollers.
Check in the same manner
as for M-18 "No Envelope
Pick-Up from Envelope
Feeder".
Procedure
~ .________
-_______
Check the movement of the
delivery roller.
---_________
Adjust the roller to move
smoothly.

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