MP6000 SC551 + General Maintenance after a period of inactivity

[FrohnB]

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!

Document feeder clutch could've just been sticky, or one of the solenoids might have been stuck. There are a few sensors on that feeder that need to be blown out. The registration sensor is usually missed (lift up document feeder and it should be next to the white plate., It probably wouldn't hurt to clean the feed rollers and belt too.

Latest System firmware is at 3.08, so it probably wouldn't hurt to do an update. Might be some stuff in there for scanning and what not. If it works as intended though, and you don't have a need for scanning to email or folder, then i would just leave it.

SC551 - make sure that the connector for the thermistor is seated properly (end thermistor), or replace the connector for that thermistor, or replace the thermistor itself. cheap enough and easy.

We've had these machines go to 3 million+ copies.

[mga]

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

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.

Trust me fit the thermistors they are cheap also the quality of the cheaper none oem roller the quality is not the same and don't last as long

[orestesp]

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

Document feeder clutch could've just been sticky, or one of the solenoids might have been stuck. There are a few sensors on that feeder that need to be blown out. The registration sensor is usually missed (lift up document feeder and it should be next to the white plate., It probably wouldn't hurt to clean the feed rollers and belt too.

Latest System firmware is at 3.08, so it probably wouldn't hurt to do an update. Might be some stuff in there for scanning and what not. If it works as intended though, and you don't have a need for scanning to email or folder, then i would just leave it.

SC551 - make sure that the connector for the thermistor is seated properly (end thermistor), or replace the connector for that thermistor, or replace the thermistor itself. cheap enough and easy.

We've had these machines go to 3 million+ copies.

I use FTP for scanning, so if there aren't any improvements on the copying or printing side of things, I won't risk it. I just saw a few threads that mentioned that a FW update could help alleviate random SC551s popping up.

Thank you for the info.

Trust me fit the thermistors they are cheap also the quality of the cheaper none oem roller the quality is not the same and don't last as long

I agree that the non OEM hot roller isn't as good as the OEM one, but it was cheap (20 euros) while the original costed 5 times as much. The machine was sold as is and I had no access to its service records (nor could I go and inspect it for myself because it was 300 km away). All I had was a few photos of its exterior and a screen with a SC550. I just fitted an non OEM part because for all I knew it didn't work at all. If it fails early or whenever it fails I'll probably replace it with a genuine part.

As for the thermistor, is AW100132 the one I need if I am not mistaken?

Thank you.

[FrohnB]

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

I use FTP for scanning, so if there aren't any improvements on the copying or printing side of things, I won't risk it. I just saw a few threads that mentioned that a FW update could help alleviate random SC551s popping up.

Thank you for the info.



I agree that the non OEM hot roller isn't as good as the OEM one, but it was cheap (20 euros) while the original costed 5 times as much. The machine was sold as is and I had no access to its service records (nor could I go and inspect it for myself because it was 300 km away). All I had was a few photos of its exterior and a screen with a SC550. I just fitted an non OEM part because for all I knew it didn't work at all. If it fails early or whenever it fails I'll probably replace it with a genuine part.

As for the thermistor, is AW100132 the one I need if I am not mistaken?

Thank you.

I see nothing in the firmware history for that model that addresses SC551's. Maybe on the later models. So, I would say you're fine not updating.

And, Yes! AW100132 is the part you want.

[slimslob]

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

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!

The Martini goes back to earlier models as well. Same basic frame, similar paper path. Minor mechanical improvements with each new model. Major electronics improvements and additions. I have had them in the teacher's resource centers at high schools go over 5M.

[slimslob]

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

I see nothing in the firmware history for that model that addresses SC551's. Maybe on the later models. So, I would say you're fine not updating.

And, Yes! AW100132 is the part you want.

I usually replace both thermistors as a set. The other thermistor would be AW1000131. While you're at it check that the thermistor leads are not pulled too tight against any metal edge as there was a bulletin out on that causing intermittent leakage to ground. When that bulletin came out I actually found one of the leads for t he middle thermistor pinched under the bracket for the rear thermistor.

[orestesp]

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

Hi again,

I will be replacing the developer - it seems that the PM counters had been reset without actually replacing the parts. After a couple of thousand of prints (~5k) the machine is full with toner, again. Density is acceptable. I took everything apart again to clean it and turns out the filter for the drum's cleaning unit was missing - which explains why the bypass tray was so dirty when I first got the machine.

I have ordered all the seals for the DV/Drum unit. Most of them still hold, but I'd rather replace them and be done with them. I will be rebuilding the charge corona.

While replacing the DV, I know that the 8mm DV bushing should be replaced preventatively else if developer starts leaking from the back of the unit, then it's done for. Do I need to replace all 4 of the 8mm bushings (P/N: B065 3069), or just a pair of them? Do I also need to replace the 4mm bushings (P/N: B070 3115)? Every how many thousands of prints should these be replaced, preventatively?

Is there anything else that I should replace so as to keep the machine tidy and to minimize toner dust getting everywhere (apart from the filters that the machine uses)?

Finally, what grease should be used to lubricate the insulating sleeves? Would a heat resistant grease from the hardware store work? I know the manual recommends some barrierta grease but I can't find it locally and from what I've seen, it's insanely expensive (250 euro for some 70 grams of it).

Thanks.

[slimslob]

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

While working on the development unit check that the Filter Plate PN B065 3108 is in place on top of the development filter. If not it will blown toner haze out the top of the development unit. The filter plate is intended to hold the filter in place.

As for a grease for the fusing unit, I don't know the current price but Ricoh-USA used to sell a 3 oz tube for just under $90.00. I did some checking around and found that Super Lube synthetic grease with PTFE work fine for about $6.00 at Harbor Freight or Lowe's. Or search it online. There is also a thread on here somewhere from a while back that discussed high temperature greases. https://www.copytechnet.com/forums/r...9=#post1592402