Kyocera 250ci squealing after a color print is done

[copydocinc]

This 250ci is squealing at the end of a color print or copy. It does not squeal during the color prints or at all on blacks. It does it only after the color prints are done and the machine is still running,
but something is clicking at that point and then the squealing starts and ends when the main machine drive motor stops. I tried making only cyan copies, only magenta copies and only yellow copies.
It does it at the end of each one, or on full color copies. It does not do it at all on black copies.
I have a service manual for this machine, but it is missing the timing charts. So I can't see what starts to turn at the end of a color print.
I'm guessing it may be what is called the color release motor, that is located on the inside of the machine and probably a pain to get at, especially if it's not the motor squealing,
but not sure if that is it or if what it turns is squealing. it drives the separation of the color secondary transfer rollers, also not sure where these rollers are.
The transfer belt unit is fairly new (only about 5000 pages on it) if secondary transfer rollers are in there.
I might be completely off on my guess, but timing charts would help.
Unless someone knows what it is and has experienced it themselves.
What do you think?

[blackcat4866]

Re: Kyocera 250ci squealing after a color print is done

How about his one?:

Squealing noise, intermittently. Possibly related to J91 & J95 jams in the DF-780 finisher. Lower gray rollers in the JS-720 job separator break loose from the shaft and slide to the outer edges of the cutout in the exit assembly. The sound results from rubbing on the sides of the slot, and creates gray rubber shavings. With JS-720 installed, re-position the lower gray rollers to the center of each slot. Remove the JS-720, mark the desired location, and superglue each roller to the shaft. Or replace shaft (303MA94020).

=^..^=

[blackcat4866]

Re: Kyocera 250ci squealing after a color print is done

Gray Roller.JPG

=^..^=

[copydocinc]

Re: Kyocera 250ci squealing after a color print is done

Thanks for the idea, but it is not intermittent.
this machine does not have a finisher or job separator.
It only happens at the end of a color copy or print run (meaning one page or 20 pages, after the last page is out and not during the run).
It never happens on a black copy or print
The squeal seems to be coming from the back where all the motors are and its a fast squeal like the speed of the motors,
but the motors are either already running long before the squeal starts, like maybe a clutch engages something at that time
or maybe another motor, that I cant see starts up.

[subaro]

Re: Kyocera 250ci squealing after a color print is done

Thanks for the idea, but it is not intermittent.
this machine does not have a finisher or job separator.
It only happens at the end of a color copy or print run (meaning one page or 20 pages, after the last page is out and not during the run).
It never happens on a black copy or print
The squeal seems to be coming from the back where all the motors are and its a fast squeal like the speed of the motors,
but the motors are either already running long before the squeal starts, like maybe a clutch engages something at that time
or maybe another motor, that I cant see starts up.

U30 in service mode are to run the motor test. run them one by one and see what you come up with or eliminate.

[copydocinc]

Re: Kyocera 250ci squealing after a color print is done

I did do that. No noise on any of the motor tests in sim 30.
I also ran the toner motor and container motor both directions in sim 135
No squeals on any of them
A timing chart might help to see what turns on at that moment the squeal starts, but I cant find one anywhere.

[darry1322]

Re: Kyocera 250ci squealing after a color print is done

I did do that. No noise on any of the motor tests in sim 30.
I also ran the toner motor and container motor both directions in sim 135
No squeals on any of them
A timing chart might help to see what turns on at that moment the squeal starts, but I cant find one anywhere.

The only thing that comes to mind at the end of color copies only is the retraction of the transfer rollers inside the transfer belt.

[Santander]

Re: Kyocera 250ci squealing after a color print is done

If I recall correctly, a number of firmware revisions ago they added a reverse rotation to the laser cleaning routine because the wiper blade was not returning to the proper position. It is only performed if more than one color is used, for a single color page [either CMYK] it is not reversed for whatever reason. Try running a test copy using just one of the colors, if it does not squeal I would take a look at the laser cleaning section as one of the blades may be flipped. I looked for the TB/QA that mentioned this but dammed if I could find it. Other than the retraction of the transfer rollers in the belt, it is the only thing I can think of that happens after the job is run.

[copier parts n.ireland]

Re: Kyocera 250ci squealing after a color print is done

hi blackcat.looking at back of machine,very bottom right side,gear box asssembley,iv had plenty of clutches either with the clip missing off or worn.

[blackcat4866]

Re: Kyocera 250ci squealing after a color print is done

I've seen that on the VoyagerE series, yes.

It occurs to me that the clicking he refers to might be the reverse rotation of the developing units at the conclusion of the print cycle. It would depend on how many of them are new style developing units with the one-way drive couplers, and what level of firmware it's at. We got a lot of complaints about that clicking at first. I would explain to the endusers that it is designed to help keep the toner in the developing unit, and not dumping all over your copies. Most were satisfied with this explanation. It's a bit oversimplified, but essentially correct. Kyocera recommended changing out all developing units to new style regardless, but we could not justify changing out functioning developing units, so they got changed as they called attention to themselves, or reached maintenance cycle, whichever comes first. It does seem to help.

=^..^=

[birchcourt]

Re: Kyocera 250ci squealing after a color print is done

Go to user maintenance mode.
Perform -drum cleaning-.
When you hear the same sound, it is proberly the big drive unit

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