MXM450 - L4-02 code

[bdcrandall13]

Hey guys, we've been working on an MXM450 with an L4-02 code for a couple weeks here in our office and can't get the damned thing back to running normally. Just a little history on the machine and how the problem started:
A new tech was sent out a few months ago to do routine PM checks on machines and went to see this particular machine. He replaced the drum and developer and cleaned other components but once he put everything back in he got this code. We fought it for a day or so then brought it back into our shop and provided them with a loaner. We changed the process unit and developer unit, main drive and drum motor. After running thousands of copies with no problem we returned the machine. The customer would still call about once a week, maybe 2, with the code and we would go reset it and it would be fine. Finally we decided there was still an issue and started working on it again. We replaced the Registration assembly, Main drive, main motor, drum motor, drum and main motor cables, PCU, Toner cartridge, another process unit and DV box, transfer unit, fuser and flash roms. We are stuck. Sometimes we will be able to run a couple hundred copies after resetting the code. After you run them and walk away from the machine for awhile, come back and try to run it again, it will jam and give the code again. Code is POD_1N. The code means POD1 is not reached, which is because the motor isn't turning normally if not turning at all.
One thing we noticed is that the code will not clear when running sim 14,15, or 16 by iteself but will after a reboot and swapping toner cartridges. However, it still only runs for a short time before coding again.
Any ideas are appreciated. I will update this post as we attempt more.
Thanks

[bdcrandall13]

Another thing I forgot to mention. We had an off lease arm455 come in recently so we have been borrowed the toner cartridge out of it and put it in. It is some kind of generic cartridge (non-oem) which we do not use. We just went and grabbed a brand new AR-455NT toner new in the box and put it in. It coded as soon as machine turned on. We put the generic cartridge in, reset and it's running 100 copies. It ran the 100 copies fine. We let it sit for about 5 minutes but once we started another copy job again it jammed then coded again.

[OMD-227]

L4-02 on the Jupiter1's could be caused by an arching MC unit, if it wasnt an obvious drum motor lock. Replacing the MC unit was usually the fix. The code appeared during warmup, after power on. Similar symptoms to your case.

On the Jupiter2's there has not been any recorded problems of L4-02 here yet, but still.... look into replacing the MC unit if you havent done so already, or check the MC unit contact points and/or HV board.

[bdcrandall13]

We have replaced the MC unit a couple of times. If I remember right they might come with the process unit when you order it. But if not, we used one out of the AR455KA kit. Maybe even done that twice. I wondered about the HV board and might do that next. We have an arm355 in our office. I just looked in the parts guide and the ARM355 and the MXM450 use the same HV board. I will swap the HV board and cross my fingers.

[CBMWilson]

We've been having a rash of L4-02's here on a number of machines. Gone so far as to replace drive units, DV units, process units, timing roller units. The only thing we've found is on a number of DV units someone decided to grease the brass bushings on the mag roller which gets gummed up with toner/developer. Cleaned that out and spec'd the mag gap and haven't had any trouble with it anymore... so far (it's been a few months) Seems like all the ones we've found have had grease there. We'll check them and clean it out as needed when we replacing a developer unit. So far it's done the trick.

[glewisme]

We've had 2 or 3 here that this issue occured all were corrected by replacing the main drive unit.One I went so far as to bring process unit,dv unit,new toner etc.. It still coded out until I replaced the main drive unit. The one common thing I did notice between all of those machines was dumping dv that seemed to get into the drive assy. Possibly causing binding. Just a thought.

[bdcrandall13]

We changed the Left door unit and have been running the machine off and on all day long. I'm not going to say that fixed it yet but we have gotten further with this than anything else. Can anyone think of why it might have made a difference?

[bdcrandall13]

Just an update on this machine, and a few more issues we need some help resolving...

Changing the left door did not fix the machine. We took it back to the customer and it coded the moment we plugged it in at their office. We ended up changing the Main Drive, Delivery unit and the DV guide plate and it appears to have corrected the original problem of L4-02 and jams. This has been running fine for a couple of weeks both in our office and in the customer's office.

HOWEVER, when hotline had us change the flash roms we were both unaware that this machine had special MXNBX2 flash roms in it. The customer purchased the MXNBX2 a few years ago to be able to network print to their machine. The MXNBX2 is the network expansion kit that basically converts a "u" version machine to an "n" version machine. Apparently the only way to get these flash roms are to purchase the kit. We were under the impression that the roms were no good, so we tossed them. Now they are saying that the only way to get network printing back is to have a set of the MXNBX2 flash roms that can run the "p" version firmware. Unfortunately, we would have to by the MXNBX2 kit AGAIN which costs $837! Bullshit! Does anyone know of a way to get around this or have any other ideas?

[CBMWilson]

I know on the old tiger machines you could copy flash roms on the MFP PWB. So if you had a set of blank roms you could copy the programming from one you had to the blanks. It was the easiest way to update the firmware, could have been the only way I just can't remember. I don't know if that is possible on the new machines. Anyone else know?

[ZOOTECH]

I know on the old tiger machines you could copy flash roms on the MFP PWB. So if you had a set of blank roms you could copy the programming from one you had to the blanks. It was the easiest way to update the firmware, could have been the only way I just can't remember. I don't know if that is possible on the new machines. Anyone else know?

"We were under the impression that the roms were no good, so we tossed them."
Without the source "p" ROMS, he has nothing to copy from. Luckily, I never had to do this, but if you have the product key for the printer upgrade, you may be able to upgrade the firmware from a "n" to "p" and then install the product key. I doubt this will work though, I suspect it will give a data error.

[Akitu]

Zootech beat me to it.

That's what I get for doing calls and leaving messages open waiting to be completed when I return... Train of thought's on the right track, it's just running a little late

[bdcrandall13]

We do have a way to get ahold of a copy of "p" roms. We have tried to copy from cn5 -> cn6 and that worked copying the good roms to the roms we needed flashed. When we tried to copy cn4 -> cn6 it did not work though. it would say NG instantly.

[vlad_]

We do have a way to get ahold of a copy of "p" roms. We have tried to copy from cn5 -> cn6 and that worked copying the good roms to the roms we needed flashed. When we tried to copy cn4 -> cn6 it did not work though. it would say NG instantly.

The story about a mess "U" in "N" in-series Jupiter 1, 2 - is as old as this world ... You are moving in the right direction. But you just at the beginning of this path.

[bdcrandall13]

Re: MXM450 - L4-02 code

It's BAAAAAAACK! Man do I hate this machine...
Customer called earlier this week saying L4-02 returned. We had them reset the machine and the code went away. The next morning the code returned and would not reset. Sent my techs over to take a look and drum auger was broken. They replaced with new process unit but code remained even after multiple attempts to reset using sim 14,16 etc. We brought the machine in our office today. The first thing I attempted to look at was the history. Especially after recently being told by my contract personnel that there are some copy count discrepancies lately. I checked the current count and it was 454,962. I got the code to clear by testing the machine using sim 6-1-5 to run the drum motor without the drum or DV in it. I reset the machine again and was able to run 200 copies with no problems. I printed a 22-6 data print and shut the machine off. I powered it back on and printed some pages form the internal print sim, 64-1. I printed a 22-6 again and noticed that the total count was lower than the previous 22-6's total count... Weird right? So i shut the machine off again, turned it back on and the count reset to 454,962! WTF! Every time you shut this machine off it resets the count to that number. I've never seen this before. I am going to reflash the firmware with a "P" version for sure this time. I also reseated the flash rom and EEPROM. If i remember correctly the count data and serial number are stored on the EEPROM. Could it be a problem with that? Any input is appreciated.

[Akitu]

Re: MXM450 - L4-02 code

If there was a problem with the EEPROM it would throw up a U6 code, and as for the drum augur breaking it could potentially be that some toner had settled in it and broke it when they fired it up. I have no idea about the meter resetting itself, that's a new one for sure...

Didn't get any resolution posts from you prior, so what was the fix for it 9 months ago?