Yes, the wrinkles point to one of three possible sources:
Moist Paper
Fuser wear, and 1.2M is about right yield on the fuser.
Loose or misaligned paper in the paper tray.
It really depends on how long the harness is, and how many flex points there are. You'll want clip leads for your meter. We call it the wiggle test.
Set the meter to beep/lowest resistance setting. Clip your meter leads onto both ends of the particular wire, then flex the wire at it's usual flex points (where doors hinge, parts move, etc. The harness usually does not break in places that are unmoving in a loom). Once you find an intermittent connection you can solder and shrink wrap it.
I must say, as a newbie you seemed to have jumped in with both feet! Great observations! And you did stuff before posting! I wish you could teach that to about half the techs posting on Copytechnet. Kudos!
=^..^=
If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=
From C452 manual 93-10 is duplex transport section jam. Go from there to the P.594 of bizhub 423 manual and do troubleshooting starting with duplex pre-registration section through the duplex transport section.
But first check bushings for the exit roller as 3ktlc suggested.
P.S
Good posting of the problem, keep this line.
A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
Blessed are they who can laugh at themselves, for they shall never cease to be amused.
I don't reply to private messages from end users.
Any luck yet?
Today the problem returned...
So replaced the door harness with no luck then removed the inner door plate to get to the duplex actuator
Found the door housing and the actuator shaft worn out but not to the extent where it fails? Need new side door...
Could be that the flag does not return in a time?
Played with it with no luck.
They use crisscross sort so changed every second tray to new orientation. Now it runs again????
Whatever
Could it be a sticky solenoid in the gate/diverter? It may test fine but not release quickly enough.......like a sensor with a wimpy spring! I KNOW you guys did not hang the switchback wrong at the frame! I've never had to do it with a bizhub yet, but it happens all the time in the smaller machines, steel solenoid magnetizes, and loses insulator pad between coil and actuator (or never had one).......electrical tape is a quick long fix if it sticks. I also had to stretch out a return spring on a magicolor to make it stop mis-registering (plunger type).
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