LJ4300, HP's cover-up 1

[Michael52x]

Cant find anything about black lines, and piles of bubbles on entire page. Tried changing H/V, P/S, DC cont., used three different toners on another 4300 and it prints perfect.Sent to HP. they replaced swing plate, un-necessarily, and returned without testing printing.
Sent it back. Provided detailed problem with examples. Returned still messed up! Hp will not admit to any problem, and if any of you get this, demand a replacement.
I repair everything they make daily. From a 2P to a 9500MFP
and I have had innumerable glitches that defied fixing.
That is until I used my own smarts to figure it out without any help from you know who.
You will get better help right here than any tech support from company sloths.

"Impatience will reward you with dissatisfaction" RMS Cosmics'97

 

[gbaughma]

Wow. Sounds like you had a bad experience.

I have about 30 HP printers, from 2100's through 8500's that I never have any serious issues with.

The "Bubbles" on the page, however, sounds like the transfer roller has gotten corrupted.

The first thing you need to do (this is a sneaky trick) is to determine *where* the problem is coming from.

One way to do this is to start it printing a test page, and open the cover (thus stopping the print engine) about half-way through the paper coming out of the tray. Then, you can carefully pull the toner cartridge out, and see if the bubbles are already there, or if they are happening later on (in the fuser assembly).



Just my 2¢
-There once was a man from Peru
Who wanted to write a Haiku
but...

--Greg

http://parallel.tzo.com

 

[hpwizzard]

Hmm... He never mentioned what paper media was used.
Today there are a wide variety of media out there.
Most works out ok, but I have seen many examples in my daily job where customer think they can use inkjet paper (often coated) in a laser printer and then try to blame HP for the problems it causes !
Bubbles could be caused by too moist paper or the environment where the printer is located.

Black lines should be rather easy to track...
Dependant on orientation and if it's blurry lines or thin sharp lines it can be anything from a worn transfer roller, laser scanner, fuser or toner cartridge (did I mention especially from NON HP toners ?)

I would really like to see some sampels of those defects.

And I can asure you there are NO COVER UP on that printer !
.oO(That is for such defects as bubbles or lines!) If you think it's a known issue.

 

[gbaughma]

hpwizzard:

That's why you're the wizard. You're absolutely right... I have seen inkjet paper run through a laser (and vice-versa) with horrid, even damaging, results.

Inkjet paper going through a fuser is not a pretty sight....

Have a star, just because I overlooked that obvious piece of advice.



Just my 2¢
-There once was a man from Peru
Who wanted to write a Haiku
but...

--Greg

http://parallel.tzo.com

 

[Michael52x]

Well, of course I have tried it all, and HP does not have a clue. This was a brand new unit. After insisting that they actually print something, they got it. I sent samples with unit, and finally someone above grunt saw the problem.
We get new unit.
I do this for a living every day, all day. We have service contracts with LA City, Healthcare, Law firms, and lots of very large companies. We do computers, monitors, network servers etc. Ive been at this for 15 yrs. now, and it's been the best job for me. {besides, I get to have a few beers when it gets stressful}I also do IBM, Xerox, Lexmark, canon, and every high end color unit HP makes.
This is great site, and I get a few clues that really help.
Thanx to all, Michael



"Impatience will reward you with dissatisfaction" RMS Cosmics'97

 

[gbaughma]

Michael:

Nice to know that you're a veteran in the business... well, now that we know that. ;-) I agree that TT is a *great* site... but we do really get all types here... and when answering a question, we need to make sure that we make it simple to understand. Keeping in mind, unless you tell us, we don't know if you're a 15-year HP repair technician, or a 15-year old who bought the wrong paper

Glad that you got it resolved, though. HP printers are really the workhorses of the industry; but with the millions of printers that they manufacture, someone, somewhere, is going to make a lemon.

I know that, percentage-wise, HP's, in my experience, have the greatest MTBF. I have printers out there with over a half-million cycles on them, and all I've had to do is the maintenance kit (Rollers and fuser).



Just my 2¢
-There once was a man from Peru
Who wanted to write a Haiku
but...

--Greg

http://parallel.tzo.com

 

[hpwizzard]

Isn't experience what makes us sloppy every now and then especially when things start to become routine ?
I am not a printer field engineer myself but educate people on a daily basis in supporting HP printers and I have seen and experienced that thing myself. You think you know the answer, but then it's a completely separate dull thing you've overseen, because usually that that particular sympton indicates just that one other thing you just tried.

Like gbaughma said, we build our answers on the info we are given in the questions. My daily work allows me access to HP internal info (not just CSN) That is info which I cannot always share directly in detail with the community, but it does give me some options when trying to solve problems for customers and helping others do the same.

What made me wonder in this case was the fact that he mentioned the printer was all new. That model 4300 came out on the market in 2002 and was replaced in 2004 by the 4350, so has this particular printer been stored for years before being sold ? In what environment(s) has it been stored ? Toners does not last forevever and even though sealed in plastic when new, a bit of moist will get to it over the years when stored.

TT is a place for me to chill out when too many tasks at work is stressing me.... Nobody's on your back here with deadlines or anything like it

 

[Michael52x]

Hey guys, thanx, and kudos to your responses.
I agree with it all. This case was a strange one, but then I get that all the time. Our clients have everything there is out there, and it is a task to keep up on the technical side of it all. It's my job, and I love it. Michael
By the by, the printer was stored in the box, but the toners are all mine, and work fine in other units.

"Impatience will reward you with dissatisfaction" RMS Cosmics'97

 

[lb63640]

I'd lean toward a fuser replacement a.k.a "maintenance kit.

 

[Michael52x]

Howdy ya'll,I just got this unit back today, and guess what? Yep, same only worse. Now it prints all the paper it can when printing just one page. Same anomolies, and HP did not even bother to print to the unit as explicitly requested. Unit is posessed, HP will replace this time.
Believe me, I deal with HP all the time, and there are many issues that they can't address, and do not have a clue. Well, got lots of other stuff to fix, so bye.



"Impatience will reward you with dissatisfaction" RMS Cosmics'97