[Error Code] U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

[RascalMJ]

Copied U6-00 info from the service manual below my description:

I have a customer that has gotten this trouble code on and off for a month or so. Easily clearable with a power cycle, but the customer is getting understandably frustrated. I went onsite a week ago (unfortunately they are an hour away). Nothing obviously wrong, I updated firmware (already had the latest, reflashed), and checked condition of the trays/drawer units....etc. I tried to check the harnesses/connectors, but these systems are the "stackable" style and the connector is in a difficult spot for 1 tech to get too. I did slide off the back panels of the CSX1 and CSX2 units and inspected all the connections I could access. No issues apparent. We have had a Sharp ESP on the unit since installation (right at a year ago).

On a whim, I did go and look to make sure all PC's printing to the MFP were properly configured through the print driver, thinking maybe that was a possible "hiccup". Several were not and I properly configured them, and I at least had some hope that might have taken care of it as it was the only concrete thing I could hang my hat on, but no such luck. Unfortunately, I can't get many details from the customer as to "when" it happens. IE... copies/prints/from a specific PC/at boot-up... etc. I really don't have any other details. Making it tough.

I am kind of lost at this point. Manual points to boards (Desk control PWB or PCU PWB), but I find that to be somewhat unlikely. We have a CSX1 unit I can take out for testing/troubleshooting, which honestly is likely my course of action, but I thought I would bring it to the attention of some of you ALL STARS who have helped in the past.

Any help would be appreciated, as always.

Thanks,

Cause Error when testing the communication line after
turning ON the power or canceling the simulation.
Connector, harness connection trouble.
Desk control PWB trouble.
PCU PWB trouble
Strong external noises.
Check & Remedy Turn OFF/ON the power to cancel.
Check the connector and the harness in the
communication line.
Replace the desk control PWB.
Replace the PCU PWB.
Error cancel method Power OFF - ON

[blackcat4866]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Once you've re-checked the connections, next I'd replace the desk main PWB unit (CPWBN1860FC31). =^..^=

[RascalMJ]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Once you've re-checked the connections, next I'd replace the desk main PWB unit (CPWBN1860FC31). =^..^=

Yeah, is this something that you have encountered? I try not to just replace boards without exhausting all other options, and have found the Sharp units to be quite accommodating in that regard (IE... typically don't see board issues)

If I am not mistaken the Desk Main is in reference to the CSX1 unit correct?

By re-check the connections, do you mean the stackable portion that is on top of the CSX units that "plug in" to the unit? Without lifting the machine off the CSX units, I am not sure how I would do that by myself. I have requested another technician be available if need be (for switching out the entire CSX1), but if the desk main PWB is the likely culprit, I might head down that path instead.

[RascalMJ]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

I was finally able to pull some teeth and get some details from the customer. It is only happening when they are printing to the bottom tray 4 (8 1/2 X 14), and it says "load paper". That tray is full of paper.

I had the customer verify that tray 4 did have paper, and it did. I then had her move the paper to tray 3, she did and said the paper size did not change on the machine. She also said that tray 2 (8 1/2 X 11) showed empty on the machine, but was full as well. Definitely sounds like a communication issue between the CSX units, and unless I am mistaken the "brains" of those lower units all come from the CSX1.

Sounds like it very well could be the board or the CSX unit itself. I'll likely take the spare CSX1 unit we have and in the process of swapping it, check the "inaccessible" connections for any damage. Then decide if I should swap the entire CSX1 or just the board

[faxman28]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Reseat cn 8 on the pcu bd (cn that goes to desk cn on main body.) reseat connectors on desk main pwb on mx- csx1. make sure nothing is plugged into outlet with copier, Esp protector is not a cure all for power problems. Had copier doing U6- xx codes, once I moved the power plug of the shredder to a different outlet the U6-xx codes stopped. U6-00 error is mfp is not getting response from mxcsx1 at power up. also print out a 23-2 list that shows date and time of jams and errors on most sharp mfps

[blackcat4866]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

I was finally able to pull some teeth and get some details from the customer. It is only happening when they are printing to the bottom tray 4 (8 1/2 X 14), and it says "load paper". That tray is full of paper.

I had the customer verify that tray 4 did have paper, and it did. I then had her move the paper to tray 3, she did and said the paper size did not change on the machine. She also said that tray 2 (8 1/2 X 11) showed empty on the machine, but was full as well. Definitely sounds like a communication issue between the CSX units, and unless I am mistaken the "brains" of those lower units all come from the CSX1.

Sounds like it very well could be the board or the CSX unit itself. I'll likely take the spare CSX1 unit we have and in the process of swapping it, check the "inaccessible" connections for any damage. Then decide if I should swap the entire CSX1 or just the board

It's a good plan.

Yes it sounds as if the MX-CSX1 has intermittently stopped communicating with the machine. It could also be caused at the machine end, but cost-wise it's cheaper to start with the tray PWB. No, it's not a known problem.

Yes you'll want a warm body to help you lift.

If you've got a little spare room in the car you might bring along the power quality analyzer.

[RascalMJ]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Reseat cn 8 on the pcu bd (cn that goes to desk cn on main body.) reseat connectors on desk main pwb on mx- csx1. make sure nothing is plugged into outlet with copier, Esp protector is not a cure all for power problems. Had copier doing U6- xx codes, once I moved the power plug of the shredder to a different outlet the U6-xx codes stopped. U6-00 error is mfp is not getting response from mxcsx1 at power up. also print out a 23-2 list that shows date and time of jams and errors on most sharp mfps

Excellent idea on the 23-2 it would be helpful to see when the occurrences were happening. I will also look into the connectors you mentioned. I only mentioned the ESP because I figured someone would ask. We have had pretty good luck with them, but you are 100% right, certainly not a cure all in the least. Upon my last visit, I did swap to a different outlet (nothing else on it) oddly enough away from a shredder as well. Unfortunately that didn't seem to help.

It's a good plan.

Yes it sounds as if the MX-CSX1 has intermittently stopped communicating with the machine. It could also be caused at the machine end, but cost-wise it's cheaper to start with the tray PWB. No, it's not a known problem.

Yes you'll want a warm body to help you lift.

If you've got a little spare room in the car you might bring along the power quality analyzer.

Thanks a BUNCH for the help. Depending on what my boss wants me to do.... we may just try the board first (less manpower/time, since the customer is an hour away).

I am hoping it is not on the machine end!

[RascalMJ]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Well, I wasn't the one to do it.... but another tech went out and replaced the Desk Control PWB and within 2 days, they called back.

On to the next step

[blackcat4866]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Step #2 is: PCU ... or power quality analyzer? =^..^=

[mojorolla]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Go to the webpage and download and inspect the job log. It will tell you EVERYTHING, including date, time, job name and file type, PC it came from, error cause, etc....
I take what the customer tells me and compare it with the job log when I have no starting point.

[Silvertoast]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

have seen this before. intermitent for about 6 months, another tech replaced the cassette pwb but did not seem to work. i went out after and assumed the other tech did it correctly and double checked his work. i was wrong... after spending hours checking everything realized that the previous tech did not push the connectors all the way till they clicked. pushed all the connectors in all the way on cassette pwb and has been over 2 months now without any problems.

[ZOOTECH]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

With due respect to the 'other tech', you have to start from scratch, and not assume anything.

[Silvertoast]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

usually dont assume, but this was a good tech, we have plenty others that the first thing i do is check all the work they already done. oh well just glad it turned out to be somthing simple

[RascalMJ]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Step #2 is: PCU ... or power quality analyzer? =^..^=

Step #2 is still being formulated. ha

Go to the webpage and download and inspect the job log. It will tell you EVERYTHING, including date, time, job name and file type, PC it came from, error cause, etc....
I take what the customer tells me and compare it with the job log when I have no starting point.

We got this and are going to try and see if we can figure anything out from it

have seen this before. intermitent for about 6 months, another tech replaced the cassette pwb but did not seem to work. i went out after and assumed the other tech did it correctly and double checked his work. i was wrong... after spending hours checking everything realized that the previous tech did not push the connectors all the way till they clicked. pushed all the connectors in all the way on cassette pwb and has been over 2 months now without any problems.

When the code came back, it's my understanding the tech was in the area and stopped in to check it out. He re-traced his steps on his own and reconnected/reseated connections...etc

With due respect to the 'other tech', you have to start from scratch, and not assume anything.

Yep, if the problems continue and I am again called onsite, I will certainly follow this protocol.

[RascalMJ]

Re: U6-00 on a Sharp MX-B402, with CSX1 and 2 CSX2 units

Checking the log. I am seeing a whole slew of 212 errors which says:

There’s no selected output tray. Delivery section * Please check the driver option settings.The requested job could not be completed correctly due
to the following reason:
(Selected output tray:No function)

This system has an FN12 inner finisher, CSX1 and 2 CSX2. So, yeah, sounds like we have a communication/board issue still. Just thinking out loud, seems the MFP loses tray settings (as mentioned previously.... tray says empty and has paper, and also will not change paper size...etc), so it seems logical that it would also "lose" the output setting and cause the "confusion". The interesting thing I see above is that it says to check the driver option. I personally did an autoconfig on all the PC's so that shouldn't be an issue, but I am wondering if someone didn't click something they shouldn't have at some point. Although the job log shows the 212 error coming from just about every PC they have.... so likely still a board issue.

I'm still wondering about the original trouble code (U6-00) and how/if it relates to the 212 errors on the job log.