LJ 8150 Paper Issue

[Replacement]

I'm having paper pickup problems with an 8150 - I've replaced the rollers in the tray and cleaned the path as with compressed air as well as I could. Every few pages, a page gets sort of "creased" or "crimped" toward the center - any ideas? :confused:

[prntrfxr]

> Is it z-folding?

when it prints its blank in the middle cause the paper's folding.
This would be the 2nd pass roller and/or 2nd pass electro-clutch.

easy fix, replace PIU - RG5-4334

trickier but cheaper fix, replace:
electro-clutch RH7-5204
2nd pass roller RB1-6561

> If the paper is not reaching 2nd pass area and is crimping under the rollers in the tray, replace separation torque limiters RB2-3581

I rebuild these units every other week - 20 at a time. Let me know if I didnt address your problem. I know these parts very well. :)

[Replacement]

Thanks for the quick reply! Actually I'm on vacation next week so I won't be back in the office until after Labor Day...I'm employed as an IT support analyst for a large distribution center - I really don't get that involved with these very often - but I will pass along the info - Thanks again! :)

[cs_steve]

Actually, if you're not experiencing paper jams, just crinkling, my first guess would be that the fuser is causing this ... if you have an alternate 8100/8150 machine, swap fusers between machines and see if the crinkling issue follows the fuser to the other machine ... the PIU is a possibility, but it is a more involved replacement ... typically you get actual paper jams with the PIU, not just creasing ...

Another important question: are you using super-cheap paper?? Not that you have to use the "premium HP" brand, but even just this month we saw some "paper crinkling" issues that were solved by switching to a slightly better brand of paper.

[redcow]

I don't believe that you mentioned which tray is causing the problem. The 2nd pass roller is only involved with trays 3 and 4. And normally it causes paper jams not creased paper.

Try the 1/2 print test and see what happens.

I think CS Steve maybe close with the fuser.

[prntrfxr]

1. do half page test if it is "z-folding" under the cartridge it is 2nd pass related. This would happen regardless of whether you are printing from tray 2, 3, or 4.

2. print 50 pages from tray 1. If it doesnt happen it is 2nd pass related. If it does, change cartridge, look at position of transfer roller (not seated properly) or obstruction in paper path, between 2nd pass and fuser.

3. If its 2nd pass related, either replace 2nd pass roller and electro clutch or replace PIU.

4. if paper is crimping before it gets to the 2nd pass roller (usually jamming in the process, under right side door) it is probably caused by the separation clutches (white in the 8100 series next to the separation rollers and bad ones also cause multi-feed problems). This problem would be tray specific and would not happen on other trays.


For red cow, if you will look in the service manual where the paper path is discussed you will notice that paper from tray 2 passes inside the jam gate and through the 2nd path area while tray 3 and 4 paper passes outside the jam gate through the 2nd path area. Paper must pass through 2nd pass no matter which way it goes. The only way to bypass the 2nd pass roller is with tray 1. If you dont believe me, simply disconnect the 2nd pass electro-clutch and try to print from tray 2. It wont work. Trust me, I've been rebuilding these for more than 5 years and they function by the same principles as the 5SI. I do 60 of those every other week.

[Replacement]

Well, while I was on vacation - they replaced the fuser which didn't correct the issue - I just got off the phone with our printer folks, they're looking at replacing the separator pad - what is really strange is that while I was on vacation one of our programmers went down to this office and was able to run standard white paper through this tray - but not the colored paper that they normally use. We've been using the same colored paper for over 7 years so that shouldn't be a problem...so is anyone in agreement with the separator pad? :confused:

[prntrfxr]

Begin troubleshooting from where the problem occurs. Rule out everything that is not probable. Whatever is left is your problem. Without information about where the problem is occurring no one will be able to help you much. It would have been helpful to know which tray was being used in the beginning.

Is it having this problem only with tray 1? If so, yes the sep pad should be replaced and I would replace the MP pick up roller at the same time.

If it is happening with all trays, then the sep pad will NOT solve the problem.

It would not be the fuser if the paper jams BEFORE the fuser. If you have a z-fold problem, unfold the paper and see if there is print on all parts of the page. If there are blank parts in the middle it is happening before the fuser and before the cartridge. IE...PIU assembly.

I agree with cs_steve, paper can definately be an issue. If the paper is a little thicker than white paper or slicker, it may not feed as well. Without information about where the problem is happening or how frequently, its going to be harder to help you. My suggestion is call a tech to site to troubleshoot the problem for you. Most of what I've been saying is not going to make much sense if you dont know what these parts are in the first place.

[Replacement]

OK - they were having the same problem again - I think I've discovered the problem - the spring in the paper tray seems to be shot - I put in a small amount of paper and watched about 20 or 30 sheets go through...Of course, I did the same thing last time - but one of the operators mentioned that she had a problem after loading it up with paper - and the jam is occurring right at the tray...it seems like it's not making it up all the way, which would be the spring - right? (I'll be a printer tech yet!)