C2790 - 3551ci

[copier tech]

Re: C2790 - 3551ci

I have it narrowed to a couple of things.


There is no binding with the transfer belt itself.

There is no binding in the transfer drive section.


There is a clicking noise when the machine is booted and does its diagnostics and I get the C2790 code.

One of 2 things is happening. Either the drive motor for the transfer belt it going bad or the transfer belt guide is worn like blackcat said and the gears aren't engaging properly. But when I put the transfer belt in the gears look to be engaged perfectly, but who knows what's happening when the motor starts turning and I can't find a way to view the belt under normal operation.


The drive motor for the transfer belt is a bitch to take off so I'm gonna install another transfer but first but I think that's pissing in the wind. We shall see....

Your error relates to the Intermediate transfer belt skew correction motor. Nothing to do with the belt drive.

In a previous post you say you've tried anther transfer belt!?

[BillyCarpenter]

Re: C2790 - 3551ci

Your error relates to the Intermediate transfer belt skew correction motor. Nothing to do with the belt drive.

In a previous post you say you've tried anther transfer belt!?

I did try another belt. It was a used one. I'm gonna try another one that I know is good.

Is the skew motor on the transfer unit itself?

[tsbservice]

Re: C2790 - 3551ci

I did try another belt. It was a used one. I'm gonna try another one that I know is good.

Is the skew motor on the transfer unit itself?

It looks like it's.
Kyocera TASKalfa 3551ci Transfer Belt Assembly, Genuine (M6171)

[blackcat4866]

Re: C2790 - 3551ci

Yes, inside the center of the belt assy. =^..^=

[BillyCarpenter]

Re: C2790 - 3551ci

I changed the belt and still have the code.

[tsbservice]

Re: C2790 - 3551ci

Does this belt unit has some type of wirings connector to the main body? If so I would carefully check this connector machine's side for any debris, paper pieces, bent pins etc.

[BillyCarpenter]

Re: C2790 - 3551ci

Does this belt unit has some type of wirings connector to the main body? If so I would carefully check this connector machine's side for any debris, paper pieces, bent pins etc.

Yes it has a large connector on the rear from with a bunch of very small pins. I looked at it thru a magnifying glass and saw no problem but it's kind of hard to see. I just took another one off a parts machine and I'm gonna replace. I need to take a long break first and I'll post the results.

[Hose1cook]

Re: C2790 - 3551ci

so I pulled the cover off the magenta laser to clean the slit glass. When I put everything back together, that's when I got the code.

Take a look at this:

[copier tech]

Re: C2790 - 3551ci

I did try another belt. It was a used one. I'm gonna try another one that I know is good.

Is the skew motor on the transfer unit itself?

You’re asking this question now!?

Have you read the service manual & looked up your error code & possible solutions?

[tsbservice]

Re: C2790 - 3551ci

Yes it has a large connector on the rear from with a bunch of very small pins. I looked at it thru a magnifying glass and saw no problem but it's kind of hard to see. I just took another one off a parts machine and I'm gonna replace. I need to take a long break first and I'll post the results.

Blow this connector with canned air to be sure it's clear. The fact you've put second belt unit and it still error codes same fault exclude ITB though. Good luck.

[blackcat4866]

Re: C2790 - 3551ci

Take a look at this:

Who'd have thought?

Could you have missed a connector to the LSU cleaner motor? =^..^=

[BillyCarpenter]

Re: C2790 - 3551ci


Like I said, I tried another belt as it's the first thing I did. I just tried a 3rd belt that come straight out of a working machine. I didn't work, either.


However, I just took another look at the connector on the rear frame and it appears there's a broken pin on the top right.

[tsbservice]

Re: C2790 - 3551ci

Take a look at this:

Just wow...what a trap! Very detailed bulletin. I'm starting to like Kyoceras.

[copier tech]

Re: C2790 - 3551ci

Like I said, I tried another belt as it's the first thing I did. I just tried a 3rd belt that come straight out of a working machine. I didn't work, either.


However, I just took another look at the connector on the rear frame and it appears there's a broken pin on the top right.

You also said you checked this in your first post!

You really did drag this fix out.

[BillyCarpenter]

Re: C2790 - 3551ci

You also said you checked this in your first post!

You really did drag this fix out.

If I did drag it out it wasn't on purpose. I read the manual from the beginning but it was hard to tell if the skew motor was part of the transfer unit or on the rear from. I figured it was on the transfer unit which is why I replaced the transfer belt first. Again, my apologies for the confusion.