power failure damaging only (Ricoh) MFP's

[Mark Bbb]

Hello there.
After a power failure it seems that the only damage is a (Ricoh) MFP, no pc's, no monitors, no routers,....
Does anyone know the reason for this?

[luca72]

Re: power failure damaging only (Ricoh) MFP's

Hello there.
After a power failure it seems that the only damage is a (Ricoh) MFP, no pc's, no monitors, no routers,....
Does anyone know the reason for this?

probably he was already about to fail, when the power came back, he got the blow, if you think it's the power supply, and you don't have another one, check: fuses, diode bridge (usually it is the one most stressed by these situations) and also opto-insulator and varistors.

[Mark Bbb]

Re: power failure damaging only (Ricoh) MFP's

probably he was already about to fail, when the power came back, he got the blow, if you think it's the power supply, and you don't have another one, check: fuses, diode bridge (usually it is the one most stressed by these situations) and also opto-insulator and varistors.

I know what i have to check and why, thank you.
This was not an answer to my question.

[copier tech]

Re: power failure damaging only (Ricoh) MFP's

Hello there.
After a power failure it seems that the only damage is a (Ricoh) MFP, no pc's, no monitors, no routers,....
Does anyone know the reason for this?

So many variables, like if the PC's etc were on an extension lead & the copier was direct into the wall.

I don't think anyone can give you a definite answer to this question.

Most likely just coincidence or bad luck.

[rthonpm]

Re: power failure damaging only (Ricoh) MFP's

Keep in mind that out of all of those items the copier would also be the only device looking to pull the full voltage from the outlet. A good spike when the power came back on could easily blow all of the caps on the power supply or damage a board that hadn't discharged any residual power that was still in it.

Anytime there's been a power related issue I recommend that the customer put in an insurance claim on the device. Even after replacing boards or power supplies those machines are rarely ever completely 'right' again.

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[luca72]

Re: power failure damaging only (Ricoh) MFP's

I know what i have to check and why, thank you.
This was not an answer to my question.

well, if you know what to check, and you find the fault, you will automatically and surely get the answer
Greetings

[slimslob]

Re: power failure damaging only (Ricoh) MFP's

Hello there.
After a power failure it seems that the only damage is a (Ricoh) MFP, no pc's, no monitors, no routers,....
Does anyone know the reason for this?

More often that not it is the surge associated with power failure that causes damage to HDD and boards. A good power line protection device can save thousands in board replacements.

[Mark Bbb]

Re: power failure damaging only (Ricoh) MFP's

More often that not it is the surge associated with power failure that causes damage to HDD and boards. A good power line protection device can save thousands in board replacements.

An expert told me that the damage is done - not at the moment of the sudden disconnection of current - but at the moment of suddenly re-powering. The damage would be done when current comes back, all of a sudden...
But, why only the MFP's? There must be an logical explanation for this.

[rthonpm]

Re: power failure damaging only (Ricoh) MFP's

But, why only the MFP's? There must be an logical explanation for this.

Biggest power draw of all devices? It's one thing to pull 5 or 10 volts to work and quite another to pull the full voltage from the wall.

[BillyCarpenter]

Re: power failure damaging only (Ricoh) MFP's

So many variables, like if the PC's etc were on an extension lead & the copier was direct into the wall.

I don't think anyone can give you a definite answer to this question.

Most likely just coincidence or bad luck.

Agreed. I've seen lightening strikes take out some things but others were fine. Write it off as an Act of God and move on instead of trying to explain it.

[BillyCarpenter]

Re: power failure damaging only (Ricoh) MFP's

An expert told me that the damage is done - not at the moment of the sudden disconnection of current - but at the moment of suddenly re-powering. The damage would be done when current comes back, all of a sudden...
But, why only the MFP's? There must be an logical explanation for this.

Ever notice that most light bulbs blow when you turn it on?


Turning on - any device - stresses that device very differently than when it’s just running.

[Mark Bbb]

Re: power failure damaging only (Ricoh) MFP's

Agreed. I've seen lightening strikes take out some things but others were fine. Write it off as an Act of God and move on instead of trying to explain it.

We had 4 cases the last 3 months, and always the same: noting else damaged but the MFP.
I like to inform customer about such matters, even when it is an insurance matter.
And also, it's my curiosity to know the reason of things.
But if you guys don't know the answer, well that's just fine by me...
I will ask the expert, perhaps he can give a logical explanation.

[BillyCarpenter]

Re: power failure damaging only (Ricoh) MFP's

We had 4 cases the last 3 months, and always the same: noting else damaged but the MFP.
I like to inform customer about such matters, even when it is an insurance matter.
And also, it's my curiosity to know the reason of things.
But if you guys don't know the answer, well that's just fine by me...
I will ask the expert, perhaps he can give a logical explanation.

I'd be careful to jump to a conclusion based on a very small sample size. You're assuming that MFP's are more susceptible to a power surge than other devices but in my experience that hasn't been the case.

I suspect that the reason no one is giving you the answer that you seek is because it doesn't exist. In my opinion, you're trying to find an answer to something that's in your head.


EDIT: And why are you experiencing all these power surges at different locations? Or is it only at a single location?

[slimslob]

Re: power failure damaging only (Ricoh) MFP's

We had 4 cases the last 3 months, and always the same: noting else damaged but the MFP.
I like to inform customer about such matters, even when it is an insurance matter.
And also, it's my curiosity to know the reason of things.
But if you guys don't know the answer, well that's just fine by me...
I will ask the expert, perhaps he can give a logical explanation.

How many of those PCs and other devices are plugged into surge suppressors or outlet strips that have surge protection built in? Some, if not most of the PCs may even be plugged into a UPS so that the users can save what they were working on and then power their computers down normally. Those devices cannot be used with most MFPs as the MFPs drawer more current that those can handle.

[Mark Bbb]

Re: power failure damaging only (Ricoh) MFP's

I'd be careful to jump to a conclusion based on a very small sample size. You're assuming that MFP's are more susceptible to a power surge than other devices but in my experience that hasn't been the case.

I suspect that the reason no one is giving you the answer that you seek is because it doesn't exist. In my opinion, you're trying to find an answer to something that's in your head.


EDIT: And why are you experiencing all these power surges at different locations? Or is it only at a single location?

The damaged machines were all at different locations. sc543 leaves no doubt what is the cause after a power failure.
After a power failure insurance companies describes such damaged machine as 'strictly unreliable'.
It seems to me you don't even know this description at all and why they describe it like that.
Well, I'm sorry for that.