ricoh mp c4504 image with ripple

[Capla]

Hi everybody. Have ricoh mp c4504 with such problem - rippled image caused by ITB unit. SO have a question about it: what exactly is causing this issue inside the ITB unit? Atached the example with differnt ITB units tested on the same machine.

[Larhal]

I noticed 2 things. 1st you have a blockage in your magenta developer leaving a void. 2nd the lighter ITB is probably due to dirty transfer rollers in the ITB and or a week or dirty contact in the ITB. Disassemble the ITB as if you were going to change the belt and clean the transfer rollers and contacts.

[luca72]

Hi everybody. Have ricoh mp c4504 with such problem - rippled image caused by ITB unit. SO have a question about it: what exactly is causing this issue inside the ITB unit? Atached the example with differnt ITB units tested on the same machine.

check the 2 white plastic hook near the PTR roller, could be breaked

[Capla]

check the 2 white plastic hook near the PTR roller, could be breaked

paper transport roller? guess it's all right. The cause of the ripple is ITB unit - 100%

[Capla]

I noticed 2 things. 1st you have a blockage in your magenta developer leaving a void. 2nd the lighter ITB is probably due to dirty transfer rollers in the ITB and or a week or dirty contact in the ITB. Disassemble the ITB as if you were going to change the belt and clean the transfer rollers and contacts.

I cleaned all roller inside ITB, it doesn't help. Image still rippled

[Larhal]

Then there is some weak contact within the ITB unit, I would scrap the old ITB unit and replace with a new one or known good one.


What is the maintenance count on the defective ITB unit?


It is probably very difficult to get new parts where you are at.

[luca72]

paper transport roller? guess it's all right. The cause of the ripple is ITB unit - 100%

exactly, they are the two white hooks that you see in this video below (I haven't found anything better)... a month ago a MC arrived with broken ones, and it reproduced the same effect as the photos you attached

https://www.youtube.com/watch?v=c01GFtfF_Gg&ab_channel=COPY-EXPERTbyTomaszJemio%C5%82ek

[Capla]

exactly, they are the two white hooks that you see in this video below (I haven't found anything better)... a month ago a MC arrived with broken ones, and it reproduced the same effect as the photos you attached

https://www.youtube.com/watch?v=c01GFtfF_Gg&ab_channel=COPY-EXPERTbyTomaszJemio%C5%82ek

it's ok with this hooks I use ITB from neighboring machine, and it's print fine. Problem is ITB unit

[Capla]

What is the maintenance count on the defective ITB unit?

Don't know. Actual count on attachment. As far as i know, no maintenance has been done with ITB. Only drum/ development restoration, and fuser replacement

[Larhal]

Don't know. Actual count on attachment. As far as i know, no maintenance has been done with ITB. Only drum/ development restoration, and fuser replacement

What is the total count on the machine?

[slimslob]

paper transport roller? guess it's all right. The cause of the ripple is ITB unit - 100%

A real technician does not guess, a real technician makes a hands on check.

[slimslob]

it's ok with this hooks I use ITB from neighboring machine, and it's print fine. Problem is ITB unit

And does the ITB from the problem machine produce the same problem in the neighboring machine? If not, it is not the ITB assembly.

[luca72]

Don't know. Actual count on attachment. As far as i know, no maintenance has been done with ITB. Only drum/ development restoration, and fuser replacement

Anyway, I'm sure it's a transfer problem, I didn't quite understand, have you tried a complete ITB unit from another machine and does it work fine?....if not, also try checking the clips/contacts inside the machine, there could be something bent, and also the power pack behind the PSU, it could rarely have problems, even if it's a bit of a tedious job to disassemble it

[Capla]

What is the total count on the machine?

2500000

[Capla]

And does the ITB from the problem machine produce the same problem in the neighboring machine? If not, it is not the ITB assembly.

a little better, but the same problem is present