MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter: 990

[luca72]

Hi everyone, I state that I am assisting my colleague in this ticket.
the machine a week ago, sc440-02 presented, my colleague brought the complete transfer unit here to the laboratory.
I disassembled it, cleaned the belt in front and behind, checked and cleaned the connections of the contact plates, and replaced the power pack with a new ricoh, and gave it back to him to be assembled by the customer.
now after a week the problem sc440-02, has returned, and now I'm going to see in person.
I am thinking it was not the transformer, but both the old, but very nice belt that maybe after cleaning it held well for a while, then it started to slip on the rollers from time to time, not transferring the current well in some moments ( ?) or has the material been fired and its electrical properties changed (?)
I am bringing a new belt, only right now, I don't have it for that model, I have a new one from the mp6002.
This unit from that customer, I don't follow it, the belt has never been replaced, and I also have doubts about the ozone filters, that maybe they don't make some "mess"


What do you think about it? do you have any explosive ideas?

[slimslob]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

I would look at the connection of the transfer unit to the main frame. I have had older martini models where there was a bad crimp on one of the connector pins that caused intermittent loss of contact. If you have another transfer unit available, try swapping the unit.

[Codex]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

Had same issue with some Mp7502, for me it was a broken wire connection on the front connector, the problem was "hidden" under the black tape... In both cases it was the black wire.

Inviato dal mio SM-G935F utilizzando Tapatalk

[FrohnB]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

I have had this code twice. Both times was the belt. It may look good, but it's not! Replace the belt, and you should be good to go!

[slimslob]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

Had same issue with some Mp7502, for me it was a broken wire connection on the front connector, the problem was "hidden" under the black tape... In both cases it was the black wire.

Inviato dal mio SM-G935F utilizzando Tapatalk

That is the same wire I have had problems with.

[Codex]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

That is the same wire I have had problems with.

I thought Ricoh changed this connector in newer models... But if lucas problem is this black wire... That means ricoh didn't learn so fast...

Inviato dal mio SM-G935F utilizzando Tapatalk

[luca72]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

I would look at the connection of the transfer unit to the main frame. I have had older martini models where there was a bad crimp on one of the connector pins that caused intermittent loss of contact. If you have another transfer unit available, try swapping the unit.

thank you, tomorrow I will check, my colleague, claims to have tried all the transfer unit on another 6503 from the same customer, and that the defect has been transported, but I do not put my hand on the fire.

[luca72]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

Had same issue with some Mp7502, for me it was a broken wire connection on the front connector, the problem was "hidden" under the black tape... In both cases it was the black wire.

Inviato dal mio SM-G935F utilizzando Tapatalk

thanks, so and hi got it, do I have to remove the black electrical tape, to examine the wiring?

[luca72]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

I have had this code twice. Both times was the belt. It may look good, but it's not! Replace the belt, and you should be good to go!

that's what I thought too, since with the new transformer after a week it came back,

I think, but I'm not sure, that the cleaning had a temporary anti-slip effect ... LOL
tomorrow I go with a used mp6002 belt but ok (his is not available at the moment in ricoh) I think it can work, I washed it super-well! ... I think that with all these elements the problem can be circumscribed

[Codex]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

thanks, so and hi got it, do I have to remove the black electrical tape, to examine the wiring?

Yes, normally it's broken close to the white connector.

Inviato dal mio SM-G935F utilizzando Tapatalk

[luca72]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

I would look at the connection of the transfer unit to the main frame. I have had older martini models where there was a bad crimp on one of the connector pins that caused intermittent loss of contact. If you have another transfer unit available, try swapping the unit.

unfortunately, I only have three complete transfer groups...but they are two of the 6002 and one of the 5500, the board is the connectors are different as far as the interlocking plastic is concerned,the rest its same.
I thought for a moment about the possibility of adapting the connectors, changing the plastics, but then the wires, will they be arranged the same? before maybe the front panel bursts in my face!... by the way.... to laugh, many years ago a ex colleague of mine, had the brilliant idea of blowing with the compressed air can, on the corona unit, in operation... LOL... it blew up:... LOL... after the Canon, made a bulletin with the words "do not blow compressed gas on the corona units during operation"... LOL... LOL

[luca72]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

Yes, normally it's broken close to the white connector.

Inviato dal mio SM-G935F utilizzando Tapatalk

I was thinking...." think if tomorrow morning I go there... there is the lifting lever in reverse"... but I told him to check.

[JonJames]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

Hi,

Has the drum blade been replaced recently? i had this code last week after a drum change and it turned out to be the blade, causing too much friction on the drum, popped a different blade in and no more code

[luca72]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

Hi,

Has the drum blade been replaced recently? i had this code last week after a drum change and it turned out to be the blade, causing too much friction on the drum, popped a different blade in and no more code

[luca72]

Re: MP6503 - SC440-02 (transfer power pack just replaced 1 week ago) total counter:

hello, update: yesterday I visit to the customer, the machine was actually back in code sc440-02, I tried to change the belt with the one I had brought but it didn't work, I could not find the black wire that breaks behind in black insulating tape , they were all blue, however none were damaged, then, by inspecting the machine better I found this (photo 1) there was a fall of waste toner from the graft of the gr.transfer into the drain, which literally buried the wiring connection in the macchine, this is the only anomaly I found ... obviously after I cleaned everything well (photo 2) , but the sc code continues undaunted.
the transfer current is there, because when printing the counter, the sheet jams in the middle of the hot roller, and the image is there!
it seems the IOB is not getting the correct feedback, and that's it from pin 6 & 7 on CN695(?) (photo 5) p.s. i checked on PtoP, and i discover that the order of wire pin connector of CN695 its same from 6002 at 6503, the feedback current and the feedback voltage pin 6 and 7 on 6002, are pin 6 and 7 on 6503, ...check it out too, it doesn't seem like I'm wrong (?) its different only the plastic connector that makes the transfer unit assy. incompatible from one to the other.
this morning the new power pack arrived, and on Monday I'm going to assemble it, I intend to replace the internal harness of the group as well (photo 4), you never know! ... I got it from a 6002 here in the laboratory, I hope it goes well, I will let you know as soon as possible.
it could have happened that the first power pack blew due to some strange short, caused by the dust that buried the connector, and then the second power pack only lasted 2 weeks, again for the same cause (?)
mp6503

inside dirty.jpg int clean2.jpg ptp6002.jpg harness.jpg