MX5001 back half of black images greatly faded

[blackcat4866]

Re: MX5001 back half of black images greatly faded

The metal roller that you're talking about is the follower roller, next to the transfer roller. There's one at each end, to lower the belt fully onto the 2 end colors (k & y). If the follower roller is not clipped in properly, there is very little to no black transfer between drum & belt.

From reading all this again, I believe that you've got bad belt units. You should be able to make one good transfer belt assembly from the two bad ones in my opinion. The more I think about it, it's now less likely that it is caused by the transfer charge PWB. =^..^=

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

Thanks blackcat. Yeah I keep going back to the belts cause it just seems to be the issue. Really glad you mentioned to look for springs off etc. We will have the warranty replacement belt in Monday and hopefully that will do it!

[blackcat4866]

Re: MX5001 back half of black images greatly faded

Sam,
Although its hard to see, the firmware levels look really old. I see you've got the data security kit installed, so this all must be updated before you calibrate. =^..^=

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

Good tips blackcat.
Yeah, we just took over this machine and where going to do basic roller kits and general cleaning when the label fiasco hit. cheap labels run through the lower drawers ended up with label pieces on transfer belt 1 & 2, stuck on black drum and drum anti spill plastic.

Unfortunately previous service company had never showed the government agency (45 people) how to use copier. Agency didn't even know how to use the stapler much less that they should use the by-pass for labels.

It is "loaded with staple saddle stitch,folding finisher,with hole punch kit large capacity side deck and just about anything that could be added -

Really very underused. At best a total of 38K per year

Anyway, once we get the machine working, firmware upgrade and instructions for client are in order!

We truly appreciate the help everyone has offered us on this!!!

[Ditchman]

Re: MX5001 back half of black images greatly faded

For what its worth i to ran into similar image quality trouble, tried different bely unit, proceeded to hunt for other causes, finally tried another belt unit and that sorted it, id go with the belt being the problem!

Hope you get it sorted!

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

Well got in replacement belt. Still same error still same problem.
BUT HERE IS THE KICKER
last week when I would do a sky shot (tried at several different stages of trouble shooting) - then drum would be covered with black FROM SKY SHOT. Now however, if I make a sky shot and "panic" stop half way through a legal size the only black on the drum is a thin line between drum and DV units. Swapping Drums doesn't make difference.

New warranty belt cams ok for color and black. Prints OK with color.
Still get error when do 44-6

Ugh from bad to worse

[mojorolla]

Re: MX5001 back half of black images greatly faded

Have you done the doctor blade and main pole adjustments for the K developer unit?

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

Good thought. I planned to check in case something is loose. Since the issue of faded black copies and error code were there while blk DV unit was functioning OK and giving good readings, it was the last thing I planned to check today.
Ran out of time as the last person there was anxious to get me out

[Dark Helmet]

Re: MX5001 back half of black images greatly faded

You should just take that thing back to the shop

Try using sim 64-1 pattern 17
It will give you nice solid test prints. Much more consistant than sky shots. You can also select which color you want or even mix colors. You can set the density (default 255) and lighten things up if you wish.

Just for fun check your laser 61-1

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

Thanks Lawrence and mojorola
Will recheck laser as it was one of the first things initially checked
Thanks for the 64-1/17 hadn't thought about that!
Will check out DV unit again today. It was OK last week but there is always some possibility that adjustment screws were loose even though we haven't messed with it yet

Just love these kinds of "tests". Seems about every 2 to 3 months we have to get one to keep us humble.

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

OK so now good warranty entire replacement belt unit. Sim 44-6 still results with K_HV_ERR (K high density process control error)
Recent change is that:
Now instead of drum being coated during sky shot (like it was before)there is no toner on drum. Have swapped out entire Proc Drum Unit - no difference.
Did 61-1 LSU Test is OK
Checked DV gap and pole - both OK
Checked toner motor -OK
Checked that toner pipe to DV not clogged
HOWEVER last week when put in new DV it calibrated OK at 128. NOW when checked it is down to 82!!
Seems like it may be pointing to the PCU-PWB??? reseated CN5,12,15 no difference

One last "what is it" question...
BTW, I will try to scan a pic of this clear plastic picker finger or pawl- like mystery piece. Not certain where it came from.Customer said forgot to tell me about it. They found it somewhere inside right side door the day the fading issue started.
The piece looks like an oversized picker finger (in that it is much fatter and slightly larger)has two small flat shafts coming off the pawl, each with a hole at the end of both that appears to be for a small shaft to go through. It is NOT FROM FUSER. Doesn't look like pic of separator pawl for transfer belt than was shown in a T.B.

[Dark Helmet]

Re: MX5001 back half of black images greatly faded

Im kind of at a loss on this but a guess as to your 82 dv ref could be due to process control. The machine is trying to get densitys up by adding more toner.

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

Well regarding the 82 value - I am a little ashamed of not communicating with the other tech who is doing some of the basic tests with this. Turns out he double checked the toner motor - didn't realize you take out toner to check. He just told me he didn't hear motor so pushed the execute about 10 or so times. When I was out there checking the laser, I took out the toner checked motor, toner pipe, sky shot to drum and then checked DV values - seeing the 82.
So we are doing our best to get this complicated
So OTHER than the over toned reading everything else is as the problem stands.

[Akitu]

Re: MX5001 back half of black images greatly faded

I notice you said you checked for spilling toner, but does your DV unit have the appropriate seal attached as well? I've checked over this thread and it wasn't answered as to whether or not your DV unit has the seal. If the machine was post Nov/10 then it should have it, if not, then check to see if that seal fixes your problem... If Lawrence is out of ideas then I'd think it would be time to start back from square 1. Haha

[Sam Tofu]

Re: MX5001 back half of black images greatly faded

Not certain on seal. Will check later today. Earlier before this problem I had looked at the DV T.B. and had checked the machine for toner spill - not seeing any and also then since we changed developer hadn't been concerned re the seal. But at this point I will jump at any thing to check. Agency has been happy with our responsiveness and accepts that much of the issues are due to their gross negligence - so we have "some" time but very soon this is going to become a pressure point.