MP6000 SC551 + General Maintenance after a period of inactivity

[orestesp]

Hello,

I received a MP6000 that hasn't been used for ~2 years. Machine initially coded out with SC550. I reset the code to see if any other code popped up, and sure enough I got a SC551. I know that this code is thermistor related code (hot roller doesn't reach desired temp after the specified amount of time), could this be a sign of a bad lamp/thermistor or is it just caused by the severely damaged hot roller that obviously needs replacing (see pic)? I am asking this because I will be ordering the parts necessary to repair the fuser and I'd like to know if there is anything else needed to get the machine back up and running.

I opened up the drum unit and apart from a lot of waste toner that had to be cleaned, I think I could get away with a new cleaning blade only.

Finally, do you have any tips for me as to what to do when reactivating a machine after a long time? According to the PM counter, the dev is at 150k, which I am guessing is the same for the corona wire, so it should be fine?. The drum should last for ~200k more, since the total counter on the machine is at 950,000 impressions. Anything else I should check?

Thanks.

IMG_20210302_173022-min.jpg

[slimslob]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

The lamps and thermostats are easy to test with a multimeter.

SC550 has to do with the fusing cleaning web end detect.

As for the development unit, run the development motor to mix the developer in case some settling has occurred. The big concern would be toner clumping in the toner hopper on top of the development unit. This could lead to under toning during operation.

[orestesp]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

The lamps and thermostats are easy to test with a multimeter.

SC550 has to do with the fusing cleaning web end detect.

As for the development unit, run the development motor to mix the developer in case some settling has occurred. The big concern would be toner clumping in the toner hopper on top of the development unit. This could lead to under toning during operation.

Thank you for your reply.

I forgot to mention that. I have already taken out the cleaning web unit and indeed the cleaning web needs to be replaced, I will be ordering one.

Am I just looking for a high resistance value on both the thermistors and the fusing lamps? Also, should I use the test mode to rotate the dev puddle motor? If they check out, what should I check next?

I also thought that the clear plastic toner pipe could be a problem. The machine used to be in an island, and I am guessing moist days were the norm. Do you think I should take it apart and clean all the toner out of it?

[slimslob]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Thank you for your reply.

I forgot to mention that. I have already taken out the cleaning web unit and indeed the cleaning web needs to be replaced, I will be ordering one.

Am I just looking for a high resistance value on both the thermistors and the fusing lamps?

If they are good the resistance should near 0.

Also, should I use the test mode to rotate the dev puddle motor? If they check out, what should I check next?

Yes you can run the motor using Output Check. Take the hopper off and set it on a sheet of paper, turn the drive coupling on it and see if toner is dispensed. If not the dispensing holes are clogged.

I also thought that the clear plastic toner pipe could be a problem. The machine used to be in an island, and I am guessing moist days were the norm. Do you think I should take it apart and clean all the toner out of it?

Take it off and see if it turns freely. If clogged, check the hole in the front of the PCU housing for clogging. A toner clog there can quickly become hard as a rock and back up into the drum cleaning station.

[JaysOnTheEDGE]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

I would try to install a fresh bottle of toner as well, have seen lots of problems caused by toner that has sat for a long time. would try to evacuate as much of the old toner as you can.

[anothertech]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Very high resistance on thermistors, very low resistance on lamps.

[mikadonovan]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

You can check thermistor temps with sp 1106. This should tell you which one is bad.

[orestesp]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Hello everyone,

First of all, I want to thank all of you for your suggestions.

This morning, I measured the resistance of the two thermistors that ride on the heat roller. Both came up with roughly the same value (~0.5 MΩ), so I then proceeded with putting the fuser back on the machine without its protective caps so I could have a clear view of the fusing lamps to see whether they worked or not. I also cleaned the thermistor contacts on the back of the fuser before putting it back on. I then powered up the machine, and the machine actually showed that it was ready to copy. I could tell by putting my hand near the fuser that it had reached temp, but alas, I couldn't test the machine yet as I am still waiting for my parts to arrive and it coded with SC550 since the web hasn't been replaced yet.

Nevertheless, I will keep you posted as to if everything works out in the end. I still have to verify proper operation of the finisher (SR970).

Thanks again.

P.S. I also removed the toner recycling auger from the machine, turns out it was fine, but I removed as much old toner as I could from it so as to avoid any possible future trouble.

[slimslob]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Hello everyone,

First of all, I want to thank all of you for your suggestions.

This morning, I measured the resistance of the two thermistors that ride on the heat roller. Both came up with roughly the same value (~0.5 MΩ), so I then proceeded with putting the fuser back on the machine without its protective caps so I could have a clear view of the fusing lamps to see whether they worked or not. I also cleaned the thermistor contacts on the back of the fuser before putting it back on. I then powered up the machine, and the machine actually showed that it was ready to copy. I could tell by putting my hand near the fuser that it had reached temp, but alas, I couldn't test the machine yet as I am still waiting for my parts to arrive and it coded with SC550 since the web hasn't been replaced yet.

Nevertheless, I will keep you posted as to if everything works out in the end. I still have to verify proper operation of the finisher (SR970).

Thanks again.

P.S. I also removed the toner recycling auger from the machine, turns out it was fine, but I removed as much old toner as I could from it so as to avoid any possible future trouble.

If you want to test it before you get the new web, use a piece of bare wire to tie the sensor arm back. If you are going to work on martinis in the future, order an extra web roll and carry it as car stock.

[mga]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Hello,

I received a MP6000 that hasn't been used for ~2 years. Machine initially coded out with SC550. I reset the code to see if any other code popped up, and sure enough I got a SC551. I know that this code is thermistor related code (hot roller doesn't reach desired temp after the specified amount of time), could this be a sign of a bad lamp/thermistor or is it just caused by the severely damaged hot roller that obviously needs replacing (see pic)? I am asking this because I will be ordering the parts necessary to repair the fuser and I'd like to know if there is anything else needed to get the machine back up and running.

I opened up the drum unit and apart from a lot of waste toner that had to be cleaned, I think I could get away with a new cleaning blade only.

Finally, do you have any tips for me as to what to do when reactivating a machine after a long time? According to the PM counter, the dev is at 150k, which I am guessing is the same for the corona wire, so it should be fine?. The drum should last for ~200k more, since the total counter on the machine is at 950,000 impressions. Anything else I should check?

Thanks.

[ATTACH=CONFIG]48490[/ATTACH]

Just rebuild hot roller, pressure roller, cleaning roller {pr}, Web & Web roller, bearings and thermistors etc check thermostats start there 1st then see what your copy quality is like

[mga]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

You can check thermistor temps with sp 1106. This should tell you which one is bad.

Looking at the picture of the fuser roller you would never get a true reading I've never seen a hot roller in that condition c/q would of been rubbish as well

[orestesp]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Hello again,

Just rebuild hot roller, pressure roller, cleaning roller {pr}, Web & Web roller, bearings and thermistors etc check thermostats start there 1st then see what your copy quality is like

The parts I ordered (hot roller, cleaning web, drum cleaning blade) finally arrived today and I fitted all of them except for the drum cleaning blade. Right off the bat, copy quality was great; there was a white streak on the first copy but the rest came out perfect. Very good density and decent halftones. I did not expect it to be this good.

Everything in general is in better condition than I initially expected, what I think I will replace preventatively are the hot roller bearings and the insulating sleeves as I don't know if they have ever been replaced before. The finisher (SR970) took a little convincing to get it to work (entrance guide was bent, along with the metal plates that attach to the back of the engine, must have happened during transport) but it wasn't anything I couldn't fix. Then the ADF started throwing J054s and J055s that didn't clear by blowing some compressed air on the sensors inside the unit, but the unit started miraculously working after a few unsuccessful tries.

It also threw a random SC551 while I was trying to clear a jam caused by the finisher's entrance guide, I will try and clean the contacts on the machine side as well. Maybe a firmware update could help as well? It reports running version 3.02 for system/copy.

If you want to test it before you get the new web, use a piece of bare wire to tie the sensor arm back. If you are going to work on martinis in the future, order an extra web roll and carry it as car stock.

I am not a tech . I just got this machine for a very low price for my shop knowing I could probably fix it for very little, which fortunately was true. Initial impressions are very good. From what I can tell, this engine design (Martini?) is also used on newer models of Ricoh B&W copiers? How many more copies are these machines designed for? I haven't found any relevant information regarding this anywhere.

Thank you for help, it is good to have it up and running!

[mga]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Hello again,



The parts I ordered (hot roller, cleaning web, drum cleaning blade) finally arrived today and I fitted all of them except for the drum cleaning blade. Right off the bat, copy quality was great; there was a white streak on the first copy but the rest came out perfect. Very good density and decent halftones. I did not expect it to be this good.

Everything in general is in better condition than I initially expected, what I think I will replace preventatively are the hot roller bearings and the insulating sleeves as I don't know if they have ever been replaced before. The finisher (SR970) took a little convincing to get it to work (entrance guide was bent, along with the metal plates that attach to the back of the engine, must have happened during transport) but it wasn't anything I couldn't fix. Then the ADF started throwing J054s and J055s that didn't clear by blowing some compressed air on the sensors inside the unit, but the unit started miraculously working after a few unsuccessful tries.

It also threw a random SC551 while I was trying to clear a jam caused by the finisher's entrance guide, I will try and clean the contacts on the machine side as well. Maybe a firmware update could help as well? It reports running version 3.02 for system/copy.



I am not a tech . I just got this machine for a very low price for my shop knowing I could probably fix it for very little, which fortunately was true. Initial impressions are very good. From what I can tell, this engine design (Martini?) is also used on newer models of Ricoh B&W copiers? How many more copies are these machines designed for? I haven't found any relevant information regarding this anywhere.

Thank you for help, it is good to have it up and running!

You should of fitted new thermistors then that code will go away also is it a oem hot roller

[mikadonovan]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

Looking at the picture of the fuser roller you would never get a true reading I've never seen a hot roller in that condition c/q would of been rubbish as well

Don't actually need a precise reading. At cold (no heat because of the fuser code), a reading of "0" would indicate an open thermistor. A good thermistor will always indicate SOME heat, even if it is just room temperature. While running, the thermistors need to be reading within 10 degrees or so of each other, or a code occurs. I was simply trying to save him the time of actually metering the thermistors.

[orestesp]

Re: MP6000 SC551 + General Maintenance after a period of inactivity

You should of fitted new thermistors then that code will go away also is it a oem hot roller

I checked the thermistors (SC551 refers to the ones that ride on the heat roller) both with the multimeter and through service mode, both of them had similar resistance (0.5 MΩ) and reported similar temperatures (ΔΤ of around 2 Celcius). I inspected them and they were clean and in good condition. I fitted a compatible roller as I didn't know if the machine would be any good and didn't want to throw out money on OEM parts in case it wasn't.