Table of Contents
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CHAPTER 4
IV. PAPER TRANSPORT TROUBLESHOOTING
If the factor of the malfunction is identified as "paper transport trouble shooting" by the mal-
function diagnosis flowchart (Figure 4-1-1), execute the followings and mend the defect.
[ 4-1 ] Multiple feed
<Possible causes>
1) If the multiple feed occurs in the cassette pick-up or in paper feeder, go to step 2). If it occurs
in the multi-purpose tray, go to step 6).
2) Deformed cassette claw
Action: Replace the claw if deformed.
3) Worn/deformed cassette separation roller
Action: Replace the cassette separation roller.
4) Spring pushing the cassette separation roller is defective
Action: Replace the spring.
5) Defective cassette separation roller torque limiter
Action: Replace the cassette separation roller torque limiter.
6) Worn multi-purpose separation pad surface
Action: Replace the multi-purpose separation pad.
7) Spring pushing the multi-purpose separation pad is defective
Action: Re-set the spring correctly. Or, replace it if deformed or damaged.
[ 4-2 ] Wrinkles/folded leading edge
<Possible causes>
1) Make a test print, and turn the power switch OFF before the paper is fed into the fixing unit.
Then, remove the ITB unit. If the paper is wrinkled at this point, go to step 8).
2) Dirty fixing unit entrance guide
Action: Clean the fixing unit entrance guide.
3) Dirty lower fixing roller
Action: Clean the lower fixing roller.
4) Scarred/deformed lower fixing roller
Action: Replace the lower fixing roller if scarred or deformed.
5) Dirty upper fixing roller
Action: Clean the upper fixing roller.
6) Scarred/deformed upper fixing roller
Action: Replace the upper fixing roller if scarred or deformed.
7) Foreign matters or dirt on the face-down and face-up delivery rollers
Action: Clean the delivery rollers.
4 - 34
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Troubleshooting
