Ricoh MP 201 NVRAM Removal Procedure

[slimslob]

Re: Ricoh MP 201 NVRAM Removal Procedure

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.

If you look at the the BICU replacement in Replacement and Adjustments section of of the service manual the NVRam is identified as call out letter[D]. It shoulld be socket mounted. Use a chip puller if you have one other slowly lift it up with a 1/8 inch or smaller flat blade. Be careful and do not try to lift entirely from one end as that has the possibility of breaking as a pin. The only time I have seen a bad NVRam was when a junior tech broke a pin. As a safety precaution backup the NVRam and print counter sheet before removing the NVRam.

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

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.
[ATTACH]46073[/ATTACH]

Could you verify which is the NVRAM Chip from the pictures I am attaching? The first is a close-up of the Ricoh Chip with NV, the second further away and the the third the replacement board's chip with PW written instead.

(It may be a coincidence that the Ricoh Chip has NV on it, it may be just a code. The replacement board's Ricoh chip has PW on it in the same place.)

BICU with NV on Ricoh Chip.JPGBICU with NV on Ricoh chip closer.JPGBICU with PW on RIcoh Chip.JPG

[tsbservice]

Re: Ricoh MP 201 NVRAM Removal Procedure

Aficio mp 201, no power to display
See the post #4 from this thread.

[slimslob]

Re: Ricoh MP 201 NVRAM Removal Procedure

Could you verify which is the NVRAM Chip from the pictures I am attaching? The first is a close-up of the Ricoh Chip with NV, the second further away and the the third the replacement board's chip with PW written instead.

(It may be a coincidence that the Ricoh Chip has NV on it, it may be just a code. The replacement board's Ricoh chip has PW on it in the same place.)

[ATTACH=CONFIG]46098[/ATTACH][ATTACH=CONFIG]46099[/ATTACH][ATTACH=CONFIG]46100[/ATTACH]

The NV and PW are manufacturing batch codes. Each time who ever makes a production run of that controller chip for Ricoh they put a different code on it.

[anothertech]

Re: Ricoh MP 201 NVRAM Removal Procedure

It looks to me that there is not a removable NVRAM chip on that BICU board.

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

The NV and PW are manufacturing batch codes. Each time who ever makes a production run of that controller chip for Ricoh they put a different code on it.

Thank you for confirming that. This is the kind of luck I am having with this repair.

By the way, I did try the NVRAM upload but it said "Failed". I assumed that was because the BICU Board has gone bad.

[mrwho]

Re: Ricoh MP 201 NVRAM Removal Procedure

Forgetting the counters for a while, did you try to enter the serial number in SP/SSP/FactorySP modes?

[patterson70]

Re: Ricoh MP 201 NVRAM Removal Procedure

Forgetting the counters for a while, did you try to enter the serial number in SP/SSP/FactorySP modes?

Actually, and this will be my last on this, the replacement board is from a MP 171 that may have a mechanical counter. It is the exact same board number and appearance, but it must be different in the chip programming. That is why I am geting the SC901. Plus I don't know how to program in the serial number. And even if so I have lost confidence that there is not some other issue that caused the BICU problem in the first place.

So I am not going to be able to resolve this and am going to part out the machine.

I appreciate and thank everyone for their help.