MP 6000 SC672

[anothertech]

Re: MP 6000 SC672

I think something like that would be in order!

Pretty stupid of me to not do what I did the other day a lot sooner to be honest.

That happens all the time. Everything seems so easy, after it's fixed.

[orestesp]

Re: MP 6000 SC672

Congrats!
I couldn't contubute but watched your epic thread hoping for the happy end. Well done enjoy your success maybe with a small ouzo and Tzatziki meze

I think something like that would be in order!

Pretty stupid of me to not do what I did the other day a lot sooner to be honest.

[tsbservice]

Re: MP 6000 SC672

Congrats!
I couldn't contubute but watched your epic thread hoping for the happy end. Well done enjoy your success maybe with a small ouzo and Tzatziki meze

[orestesp]

Re: MP 6000 SC672

Well, some good news... it's finally FIXED

Short version: It was the controller/IPU power supply (P/N: AZ230198)

Long version (and for future reference): There is a 4 pin connector that connects to the PSU. It's basically 2 pairs of 2 wires. One of the pairs connects to the Motherboard, while the other goes to the back of the control box and then connects to the main PSU of the machine.

In a desktop PSU (ATX PSU), which is the same kind of power supply at the faulty one (SMPS) the power on signal comes in the form of shorting one pin to ground. So I thought to myself, maybe it works the same way here as well.

Using a copper strand from a power cable to probe the wiring harness, I first determined with the multimeter which cables belonged to which pair. Each pair consists of a ground (GND) wire and a control wire (labeled CTRLO). With the same copper strands as probes, I connected one lead of my multimeter to the CTRLO wire of one pair and the other lead was simply connected to the control box chassis using an aligator clip. Then I switched on the main power switch and observed what happened.

For the CTRLO wire that leads to the motherboard, there is a momentary shorting of the CTRLO wire to ground.

For the CTRLO wire that leads to the main PSU, the CTRLO wire is constantly connected to ground while the machine was powered on.

After figuring out that there is some short of power on signal sent to the PSU, we should have voltage on the output side, right?. Well, all the power rails were either at 0V or at 0.8V (=no good).

0-02-05-88071c5c6af455c963d9a73bbfe2881326125f7d417f3e0b8404c3fbe44bdf20_52c8249fca7d2a2a.jpg

There weren't any obvious signs of something going wrong with the PSU (no blown fuse, no black stains, etc). Shame, it was made by nichicon after all using all good quality caps.

P.S. Don't forget to discharge the main capacitor.

Hopefully this saves someone some time in the future!

Thanks to everyone for their suggestions

[orestesp]

Re: MP 6000 SC672

For one, Ricoh does not make the chips. They bulk purchase what are actually standard devices that have the original chip makers label still on them. You should be able to search the information on the labels and find exact matches for the device. Ricoh does spot test the devices. If they find defective devices they reject the entire batch.

Yes I imagined, I was concerned of Ricoh putting an artificial limitation on what parts you can use, i.e. not being able to work with 3rd party memory due to some software trickery or whatever.

A few days ago i was at a client on MP8000 with a SC672 and PLEASE WAIT message so while i was checking the controller on the back and thinking about my bad luck i remember an old article on Ricoh saying to check the ground spring on the back of the transfer belt that may cause this problem so i cleaned the transfer unit and the back of the machine were the ground spring contacts with a vacuum cleaner, also just to be sure cleaned the drum unit and the drum ground spring, and BOOM the machine was working like a charmed.



SC672 is displayed after display has frozen

Published 10/14/2009 11:00 AM | Updated 12/22/2017 04:56 PM | Answer ID 112134


[Symptom]
After a copy job finishes regardless of quantity, the control panel displays "Copying" or "Ready", however the control panel will not respond and 30seconds later SC672 is displayed.




[Cause] Toner contamination may occur between the earth contact points on the main frame and the earth contact springs located on the rear of the transfer belt and drum unit assemblies.
[Action]
Ensure that the area the springs contact on the rear frame is clean and any toner found on the rear of the transfer belt and drum unit is also removed.

There was some toner dust but nothing significant on the back, cleaned it anyway and as you can probably guess, still nothing.

No parts right now, I shall keep you updated as we go. Thank you for all your suggestions so far.

Onto page 10 then!

[copytrust]

Re: MP 6000 SC672

A few days ago i was at a client on MP8000 with a SC672 and PLEASE WAIT message so while i was checking the controller on the back and thinking about my bad luck i remember an old article on Ricoh saying to check the ground spring on the back of the transfer belt that may cause this problem so i cleaned the transfer unit and the back of the machine were the ground spring contacts with a vacuum cleaner, also just to be sure cleaned the drum unit and the drum ground spring, and BOOM the machine was working like a charmed.



SC672 is displayed after display has frozen

Published 10/14/2009 11:00 AM | Updated 12/22/2017 04:56 PM | Answer ID 112134


[Symptom]
After a copy job finishes regardless of quantity, the control panel displays "Copying" or "Ready", however the control panel will not respond and 30seconds later SC672 is displayed.




[Cause] Toner contamination may occur between the earth contact points on the main frame and the earth contact springs located on the rear of the transfer belt and drum unit assemblies.
[Action]
Ensure that the area the springs contact on the rear frame is clean and any toner found on the rear of the transfer belt and drum unit is also removed.

[slimslob]

Re: MP 6000 SC672

Basically what I am asking is: If I match the RAM stick specs with a non-Ricoh RAM stick will it work or is there some sort of whitelist or DRM in place preventing me from using non-Ricoh parts? I am guessing there isn't but I honestly wouldn't be surprised if there was.

God knows how bad this has gotten with consumer electronics these days.

For one, Ricoh does not make the chips. They bulk purchase what are actually standard devices that have the original chip makers label still on them. You should be able to search the information on the labels and find exact matches for the device. Ricoh does spot test the devices. If they find defective devices they reject the entire batch.

[orestesp]

Re: MP 6000 SC672

The memory on every Ricoh that I ever worked on had the manufacturers label on it to include a searchable number, just like their HDDs.

Basically what I am asking is: If I match the RAM stick specs with a non-Ricoh RAM stick will it work or is there some sort of whitelist or DRM in place preventing me from using non-Ricoh parts? I am guessing there isn't but I honestly wouldn't be surprised if there was.

God knows how bad this has gotten with consumer electronics these days.

[slimslob]

Re: MP 6000 SC672

Well I am still at it and right now I can't get any parts to try on.

I would like to ask this, however:

Has anyone used successfully a pair of off-the-shelf laptop RAM (that is of course the same gen, capacity and frequency as the original part) as the SO-DIMM sticks on the board that Ricoh calls the "motherboard"? The P/N for these sticks is B234 5563.

slimslob did mention that, on the controller at least, that it uses standard laptop memory but like I mentioned, I couldn't find what the exact spec for these are (honestly not terribly familiar with hardware before DDR2) but fortunately the RAM on the "motherboard" appears to be standard DDR SO-DIMM RAM.

The memory on every Ricoh that I ever worked on had the manufacturers label on it to include a searchable number, just like their HDDs.

[orestesp]

Re: MP 6000 SC672

Well I am still at it and right now I can't get any parts to try on.

I would like to ask this, however:

Has anyone used successfully a pair of off-the-shelf laptop RAM (that is of course the same gen, capacity and frequency as the original part) as the SO-DIMM sticks on the board that Ricoh calls the "motherboard"? The P/N for these sticks is B234 5563.

slimslob did mention that, on the controller at least, that it uses standard laptop memory but like I mentioned, I couldn't find what the exact spec for these are (honestly not terribly familiar with hardware before DDR2) but fortunately the RAM on the "motherboard" appears to be standard DDR SO-DIMM RAM.

[KeviM]

Re: MP 6000 SC672

I'm thinking it's 1 of the following :

1) PSU for the controller
2) Main PSU
3) Control panel - maybe backlight failing - maybe entire panel

Mostly seems like PSU for the controller.

All the best friend. Keep us updated

[orestesp]

Re: MP 6000 SC672

Check the wires in the area of the parts that were removed.
I've had this a two times once with a mp2500 and with a Aficio 3030, long time ago.

Believe me, I have taken every wire that there is on the control box, sprayed it with contact cleaner and made sure that it is snugly fit into position. I also tried some of the cables on the BCU later. I couldn't find a damaged cable or one that was plugged improperly.

[Mark Bbb]

Re: MP 6000 SC672

What should I be checking?

Check the wires in the area of the parts that were removed.
I've had this a two times once with a mp2500 and with a Aficio 3030, long time ago.

[orestesp]

Re: MP 6000 SC672

blocked 12 - 24 V wire

What should I be checking?

[Mark Bbb]

Re: MP 6000 SC672

blocked 12 - 24 V wire