Ricoh MP 201 NVRAM Removal Procedure

[patterson70]

Hello

Have a MP 201SF that had a SC547. I followed all the advice here and found no resolution.
(plugged into different power sources, swapped the Power Supply out, swapped the drum unit)

I was then fairly certain it was the BICU Board and swapped it with the same one from a parts machine.

Question: I don't see how I can remove the NVRAM chip, it appears soldered in, is it?
(I know this is why I am getting the SC 901)
And if not soldered how best to remove it without damaging the pins? ( I see where this is very easy to do).

Lastly, do I really need to swap the NVRAMS if I don't care if the copy count is wrong? I can sell it and let the customer know the correct count.

Also, do any BICUs have a fuse or fuses? Would have been nice just to have to swap it or them out...

Thanks

[TonerMunkeh]

Re: Ricoh MP 201 NVRAM Removal Procedure

As far as I can tell the BICU nvram isn't soldered in, there is a replacement for it in the service manual that just says remove it, it seems quite a large one too at the top right of the board. Use a long, small knife to push under the chip to lift it.

[davel]

Re: Ricoh MP 201 NVRAM Removal Procedure

You must be looking at the wrong chip

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

Thanks guys, I think I am looking at the right chip, it does say NV right on it.

Any response to my question as to whether I really need to do it?

That is, as long as I tell the customer it was replaced and what the real count is does it make any other difference?

[sandmanmac]

Re: Ricoh MP 201 NVRAM Removal Procedure

Thanks guys, I think I am looking at the right chip, it does say NV right on it.

Any response to my question as to whether I really need to do it?

That is, as long as I tell the customer it was replaced and what the real count is does it make any other difference?

Easy to replace. It's Pretty standard chip as on most models, so there's no reason not to swap it over, and to the best of my knowledge it either has to be replaced with the original chip or a brand new one. I don't believe you can use a chip from another machine.
MP 201.pdf

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

Thanks for the diagram - I was looking at the NVRAM chip on the BICU Board - I see you are showing the one on the Controller. I don't have a problem with the controller. I'm referring to the big board.

[sandmanmac]

Re: Ricoh MP 201 NVRAM Removal Procedure

Thanks for the diagram - I was looking at the NVRAM chip on the BICU Board - I see you are showing the one on the Controller. I don't have a problem with the controller. I'm referring to the big board.

Oops...My bad. Sorry about that. I should have read your post more thoroughly.
Although looking through my manual, that chip is supposed to be removable as well, but I don't believe it's absolutely necessary to swap it.
Are you sure you've reconnected everything properly? SC901 is typically a mechanical counter error. Maybe that connector was missed?
Are you sure the board was ok before it became a "parts machine"?

[FrohnB]

Re: Ricoh MP 201 NVRAM Removal Procedure

What have you done with the fusing unit? Bad Thermistor maybe?? Bad Hot Roller? something unplugged?
Did you RESET the fuser error code SC547 by going into SP Mode and then turning the power off on the machine?? If you don't do this, the code will just stay there upon every reboot.




As far as the NVRAM, take a really small flat-head screw driver, and stick it between the NVRAM and it's seat, and pry up gently. Do that on both open sides of the NVRAM to get it out without bending the legs.

[slimslob]

Re: Ricoh MP 201 NVRAM Removal Procedure

I am wondering how you decided that you needed to replace the NVRam in order to correct SC547 which is a zero cross fusing error?

[mga]

Re: Ricoh MP 201 NVRAM Removal Procedure

Here is where both nvrams are but that error doesn't relate to nvrams

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

Oops...My bad. Sorry about that. I should have read your post more thoroughly.
Although looking through my manual, that chip is supposed to be removable as well, but I don't believe it's absolutely necessary to swap it.
Are you sure you've reconnected everything properly? SC901 is typically a mechanical counter error. Maybe that connector was missed?
Are you sure the board was ok before it became a "parts machine"?

Ok about not having to remove the NVRAM unless you want to keep the counter accurate.
Yes I'm sure about connecting everything properly, swapped the old one back in just to see if the SC547 came back and it did.
I did a lot of research and the SC901 also means you have to input the serial number but i did not go that far yet. Not sure how to do that yet but i saw that it is done when you need to do this swap.

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

What have you done with the fusing unit? Bad Thermistor maybe?? Bad Hot Roller? something unplugged?
Did you RESET the fuser error code SC547 by going into SP Mode and then turning the power off on the machine?? If you don't do this, the code will just stay there upon every reboot.

As far as the NVRAM, take a really small flat-head screw driver, and stick it between the NVRAM and it's seat, and pry up gently. Do that on both open sides of the NVRAM to get it out without bending the legs.

Yes, I did go into service mode and then power off and back on. Still the same SC547. Knew about this having to be dome but thanks for the heads up.

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

I am wondering how you decided that you needed to replace the NVRam in order to correct SC547 which is a zero cross fusing error?

Thanks but I did swap with a know good fuser and still the same SC547, and I did go into service mode and then power off/on. Still remains.

I found that the SC547 is also either a bad power source or a bad power supply or a bad BICU.

[slimslob]

Re: Ricoh MP 201 NVRAM Removal Procedure

Thanks but I did swap with a know good fuser and still the same SC547, and I did go into service mode and then power off/on. Still remains.

I found that the SC547 is also either a bad power source or a bad power supply or a bad BICU.

DId I say SC547 was a fusing unit error -- NO. I said it was a zero cross fusing error. Zero cross is detected in the PSU and utilized by the engine controller so that the triacs that drive the lamps are not trying to switch at the peak of the AC cycle.

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

DId I say SC547 was a fusing unit error -- NO. I said it was a zero cross fusing error. Zero cross is detected in the PSU and utilized by the engine controller so that the triacs that drive the lamps are not trying to switch at the peak of the AC cycle.

Apologies, I saw it at some sites referred to as a zero cross electrical issue of some sort and never referencing the fuser.

Also I am replacing the BICU due to the SC547 due to trying everything else as suggested.
But I need to swap the NVRAMS to keep the serial number and print count and that is where I am stuck.
Now I am thinking the square "Ricoh" chip that says NV on it is NOT the NVRAM chip!
I'll look again.