[Jamming] bizhub 423, 93-10 , Duplex/Switch Back

[CopierNerd]

Dear Experts and Experienced Fellows,

bizhub 423,
Paper Jamming in Duplex Section,
Jam Code> 93-10,
Jam indication at 14 Number,
RTFM! No details for this particular code.
Paper gets jam after 30, 40, or sometimes 60 copies (Duplex). Sometime did not jam at all.
During Switching back and entering in duplex, when paper touches the actuator of PS92 Duplex unit upper transport sensor (PS92) get blocked properly but Duplex transport motor does not energize. As a result paper gets jam.

Work Done> Replaced PS92,
PS91, PS93 Cleaned and swapped, No progress,
Switchback Motor swapped with Duplex Motor, No progress,
Checked Belts
Checked Connectors

Relevant Parts> Switchback Motor, Duplex Motor, PS91, PS92, PS93, PRCB,

Any suggestions?

[allan]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Fighting the same demon now. Paper goes into the duplex and stops under the middle roller in the duplex.
Change the motor the sensors for the duplex door and the flag sensor changed the fuser and the switch back unit with no luck.
Not sure if its fixed but i removed the duplex drive and twisted it to force the belts to tension and no problem after that what i know of.
Funny thing is it would work for long streaks and then continues to jam until I touch the machine and then runs again.
If it reoccurs i am going to replace the harness going the the side door...


Clicks on your machine?

[blackcat4866]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Fighting the same demon now. Paper goes into the duplex and stops under the middle roller in the duplex.
Change the motor the sensors for the duplex door and the flag sensor changed the fuser and the switch back unit with no luck.
Not sure if its fixed but i removed the duplex drive and twisted it to force the belts to tension and no problem after that what i know of.
Funny thing is it would work for long streaks and then continues to jam until I touch the machine and then runs again.
If it reoccurs i am going to replace the harness going the the side door...


Clicks on your machine?

A broken lead in the harness could create an intermittent issue like this.

Anything unusual about the media?
=^..^=

[CopierNerd]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Fighting the same demon now. Paper goes into the duplex and stops under the middle roller in the duplex.
Change the motor the sensors for the duplex door and the flag sensor changed the fuser and the switch back unit with no luck.
Not sure if its fixed but i removed the duplex drive and twisted it to force the belts to tension and no problem after that what i know of.
Funny thing is it would work for long streaks and then continues to jam until I touch the machine and then runs again.
If it reoccurs i am going to replace the harness going the the side door...


Clicks on your machine?

Clicks: 1150K+

I will check the harness.
Thanks

[CopierNerd]

Re: bizhub 423, 93-10 , Duplex/Switch Back

A broken lead in the harness could create an intermittent issue like this.

Anything unusual about the media?
=^..^=

Anything unusual about the media is, Wrinkles are appearing during duplex. Single sided copies> No problem at all, no wrinkles.

If lead is broken then i can check its continuity via Multi-meter.

[mjunkaged]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Anything unusual about the media is, Wrinkles are appearing during duplex. Single sided copies> No problem at all, no wrinkles.

If lead is broken then i can check its continuity via Multi-meter.

Wrinkled duplex and perfect single sided usually ends up being a fuser unit about to go for me. Does it do the same wrinkling from all trays, different sizes/directions?

[mjunkaged]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Fighting the same demon now. Paper goes into the duplex and stops under the middle roller in the duplex.
Change the motor the sensors for the duplex door and the flag sensor changed the fuser and the switch back unit with no luck.
Not sure if its fixed but i removed the duplex drive and twisted it to force the belts to tension and no problem after that what i know of.
Funny thing is it would work for long streaks and then continues to jam until I touch the machine and then runs again.
If it reoccurs i am going to replace the harness going the the side door...


Clicks on your machine?

Does yours wrinkle on duplex Allan? See ?? to poster......

[allan]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Does yours wrinkle on duplex Allan? See ?? to poster......

Nope no wrinkle but the same issue but J93-10 and amount of clicks the same.
The paper before the fuser does wrinkle due to machine stopping when the duplex jam occurs.
The tray alignment could be an issue.

[CopierNerd]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Wrinkled duplex and perfect single sided usually ends up being a fuser unit about to go for me. Does it do the same wrinkling from all trays, different sizes/directions?

Yes, you are right! wrinkled duplex can be due to expired pressure roller. Mine is suspicious. Main issue is jamming in Duplex.

[3ktlc]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Had to replace the bushings for the exit roller for this problem.

[darry1322]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Dear Experts and Experienced Fellows,

bizhub 423,
Paper Jamming in Duplex Section,
Jam Code> 93-10,
Jam indication at 14 Number,
RTFM! No details for this particular code.
Paper gets jam after 30, 40, or sometimes 60 copies (Duplex). Sometime did not jam at all.
During Switching back and entering in duplex, when paper touches the actuator of PS92 Duplex unit upper transport sensor (PS92) get blocked properly but Duplex transport motor does not energize. As a result paper gets jam.

Work Done> Replaced PS92,
PS91, PS93 Cleaned and swapped, No progress,
Switchback Motor swapped with Duplex Motor, No progress,
Checked Belts
Checked Connectors

Relevant Parts> Switchback Motor, Duplex Motor, PS91, PS92, PS93, PRCB,

Any suggestions?

I have no suggestions beyond what's already been posted. Just wanted to say that's a damn fine write-up of the situation.

[allan]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Had to replace the bushings for the exit roller for this problem.

I will go and inspect this bushing.
You mean the roller on the top of the door.
The first duplex entrance roller?

[blackcat4866]

Re: bizhub 423, 93-10 , Duplex/Switch Back

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!
=^..^=

[CopierNerd]

Re: bizhub 423, 93-10 , Duplex/Switch Back

Had to replace the bushings for the exit roller for this problem.

Paper Exit/Switchback roller is in Switchback unit. I guess you are suggesting about the wrinkling problem not jamming?

I will surely check this one too.

[CopierNerd]

Re: bizhub 423, 93-10 , Duplex/Switch Back

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!
=^..^=

Thank you very much blackcat4866 for these kind words.