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Gab
05-25-2021, 07:05 PM
It makes single sided copies with no problem.
When doing 2-sided , it prints the first side and when it pulls in duplex unit paper it stops and paper jam. It doesn't try to pull in paper again.

Phil B.
05-25-2021, 07:09 PM
It makes single sided copies with no problem.
When doing 2-sided , it prints the first side and when it pulls in duplex unit paper it stops and paper jam. It doesn't try to pull in paper again.

jam code?

what gsm paper are they using?

are the duplex rollers clean?

any visible obstructions?

as always need more info from you.

Synthohol
05-25-2021, 07:15 PM
10+ red cards Phil, why even bother responding?

Phil B.
05-25-2021, 07:30 PM
10+ red cards Phil, why even bother responding?

trying to be a kinder more helpful Phil B. brother

allan
05-25-2021, 10:04 PM
Recall there was a very common problem with switchback sensor actuator un-clipping or breaking.

Toxic
05-27-2021, 01:01 AM
Whenever i have this problem on 420/500 it was always grease inside duplex clutches.
KM long time ago release TAD about this problem.
Cleaning clutches solve problem for some time but replacing clutches and removing excesive grease from duplex gears is permanently solution.

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