Toshiba 3005AC Rainbow running Lengthwise on certain halftones

[blackcat4866]

Have had this many times and it has always been the colour drums. Replacing the transfer belt has improved it for a while but have had to do the drums eventually. as per your samples , it is only really obvious when client printing halftones

Solved in post #11: https://www.copytechnet.com/forum/te...78#post1585478

[Pirate1936]

Have had this many times and it has always been the colour drums. Replacing the transfer belt has improved it for a while but have had to do the drums eventually. as per your samples , it is only really obvious when client printing halftones

[djbass]

The manuals often refer to the ones inside the transfer belt as TR1 rollers and the one on the ADU door as TR2 roller.

[Rusty.Harris]

I'm not familiar with this term. When you say "facing roller" am I correct in assuming you are talking about the roller inside the Tx belt that the secondary Tx roller indirectly presses against?

Also, could you provide that ANSI A file for A4 paper, please?

Toshiba uses that term. The 2nd transfer roller, is the one that is mounted on the ADU door you open on the right side of the machine.
They also call the roller inside the transfer belt a transfer roller, but they use the term 2nd transfer facing roller, I guess because it faces
the transfer roller.

[Munter]

Awesome. Thank you very much. 😁

[blackcat4866]

I'm not familiar with this term. When you say "facing roller" am I correct in assuming you are talking about the roller inside the Tx belt that the secondary Tx roller indirectly presses against?

Also, could you provide that ANSI A file for A4 paper, please?

Yes, that's correct.

Is this what you want? =^..^=

[Munter]

I'm leaning towards the facing roller ground contact. =^..^=

I'm not familiar with this term. When you say "facing roller" am I correct in assuming you are talking about the roller inside the Tx belt that the secondary Tx roller indirectly presses against?

Also, could you provide that ANSI A file for A4 paper, please?

[blackcat4866]

There is a wire leaf spring that makes physical contact between the facing roller and the electrical contact. It's easy to displace this leaf spring when disassembling.

[tomasreabe]

um ... yeah, 1MΩ is bad. The correct resistance between the roller and the contact vary at ≤0.10Ω. Keep in mind that's rolling resistance. When it's not rolling, the resistance will increase significantly.

So I did replace the transfer belt assembly, I could not finde where to order the bearings that were causing the high resistance.
The new assembly has a resistance around 4-6 ohms, so much better and the image is much improved.
does anyone know where to get just the bearigns from as I did find a few rollers that do have similar bearings that the ohms resistance is realy high. 250K to 500K

Thanks for all the help

[blackcat4866]

um ... yeah, 1MΩ is bad. The correct resistance between the roller and the contact vary at ≤0.10Ω. Keep in mind that's rolling resistance. When it's not rolling, the resistance will increase significantly.

[tomasreabe]

There are three choices for that (94 to 96mm):
Fuser film (usually reprints image elements down the page)
Drum
Facing roller (Poor ground connection to the facing roller in the transfer belt unit)

I'm leaning towards the facing roller ground contact. =^..^=

Is there a specific maximum reisistance I should be looking for?
I did see resistance going up to 1M ohm so I know that is not good.

[blackcat4866]

There are three choices for that (94 to 96mm):
Fuser film (usually reprints image elements down the page)
Drum
Facing roller (Poor ground connection to the facing roller in the transfer belt unit)

I'm leaning towards the facing roller ground contact. =^..^=

[tomasreabe]

Measure the distance between the start of the first blank area, to the end of the blank area to give you the diameter of the blank area. That will help track down what could be causing the issue as it is a repeating problem.

Printing an 11x 17 it repeated every 3-3/4" so that would be a 1.2" roller or so.

[Rusty.Harris]

Hello, I think I have a similar problem but it appears to be on all colors not just a single one.
Wondering if this is a transfer belt issue or where I should start looking.
Estudio 3505AC
IMG_3824.jpg

Measure the distance between the start of the first blank area, to the end of the blank area to give you the diameter of the blank area. That will help track down what could be causing the issue as it is a repeating problem.

[tomasreabe]

Re: Toshiba 3005AC Rainbow running Lengthwise on certain halftones

PM interval for the 3005AC is 180K black, 90K color. (3) color rebuild includes (3) drums and EPU-KIT-FC505CLR.

You'll need to do the (3) color developer stir, and color calibration. Before you start, I'd suggest printing off the FS-30-103 PM list.

Excuse me please if I won't read you the manual. You seem perfectly able to read the procedure to stir the developer and do a color calibration for yourself. And when you figure it out for yourself you'll get that good feeling of figuring it out for yourself.

If you'd like a more detailed analysis print these pages, then show them to us:

Hello, I think I have a similar problem but it appears to be on all colors not just a single one.
Wondering if this is a transfer belt issue or where I should start looking.
Estudio 3505AC
IMG_3824.jpg