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Re: bizhub 423, 93-10 , Duplex/Switch Back
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.Comment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
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????
WhateverComment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
I didn't go there again to check. Customer informed me over the phone that it jams sometime and sometime don't. So they are using it anyhow. I think whole door replacement is the last resort.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????
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Re: bizhub 423, 93-10 , Duplex/Switch Back
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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Re: bizhub 423, 93-10 , Duplex/Switch Back
With this design they eliminated the solenoid driven gate. The duplex and the paper exit use the same path. Will post a video soon.
The timing is so tight on the paper returning to the duplex and the paper exiting its like bad magic...WhateverComment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
Jip super quick to remove. Remove the fuser and then loosen two and remove two screws.
This is a weird issue that happens to these machines is it runs the duplex past 500K...
Every one that gave me advise told me its the motors, but these motors don't fail easy.
Will have to find a door in a good condition.
Think its the sensor flag that moves erratically combined with tight timing due to wear on the actuator housing.WhateverComment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
I have had 1 motor failed. Thought it was due to the bushings locking up.Comment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
Allan! I went there again. This time not with old used side door but with the idea to check the harness. If any wire is damage inside. I removed the side door. Removed the metallic plate and torn the harness (Black Covering) After removing, i checked every wire all way to the PRCB. It was OK.No damage. Then i removed complete assembly, Duplex Transport motor, Sensor, Drive belts etc. Cleaned the shafts and lubricate them. Didnt bend any shaft to increase tension of belts. After lubricating i fixed it back. Closed the whole door and installed it.
When i made copies, duplex unit was soundless like new. That damned code didnt appear again, No jam in duplex transport no jam any where. My problem solved just by cleaning and lubricating the duplex transport unit and removing the harness from the connectors. I want you to try this too.
I thought what is in the door left for replacement? for which i need to replace the whole door? As i had already replaced switchback motor, duplex transport motor, All sensors, wiring and checked actuators too.So i did this which was left to do.Comment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
Congratulations on your success. Exploratory surgery is a reasonable solution. Surprisingly often you can solve an issue without actually knowing what you fixed. =^..^=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 =^..^=Comment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
Also striped and cleaned the duplex and the problem is a lot better after i tweaked the sensor actuator that got worn out.
Now its jamming every other thousandth prints.
I have ordered a new actuator to see it it will resolve the problem. The door body will get a bit of hot iron treatment.WhateverComment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
Ok got it MacGuyver fixed by removing pressure from the exit driven rollers where the switchback motor was holding the edge of the paper!
Melted a paperclip thru from the bottom hooked it over the shaft pulled the shaft down and bent the paperclip to hold its position.
Not a fan of these kind of fixes but can't work my head around why it happend.
Other things i tried was changing the sensor flat lenght by adding to it and the sensor position with no luck.
Did clean all of the shafts and there is no strain on the duplex drive.WhateverComment
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Re: bizhub 423, 93-10 , Duplex/Switch Back
I changed the switchback unit out with a known working one and installed on another machine that is working so i don't think so.
The holding torque on the switchback motor when stopping just to soon clamps the edge of the paper between the exit rollers on the way back into the duplex unit.
It actually stalls out the duplex motor that is still trying to pull to paper. So my thinking was if i remove pressure from the exit rollers then the duplex motor will win the tug of war.
Glad it worked!
Could be a faulty control board. But just to stubborn to replace it.WhateverComment
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