[CQ] MP7500 overtoning

[mrwho]

Hello folks.

I've got an MP7500 which wasn't serviced by us before and it appears to have had its counters reset (really, don't look at me!) because the machine has only about 5k copies on it and the consumables were almost zeroed. So either this was a showroom machine which was bought real cheap before we were called or something fishy was afoot.

The problem is the machine keeps overtoning, causing background and ghost images and spills toner everywhere. I've tried several times to take skyshot copies to spend the extra toner on it and redo the developer initialization.

To make matters worse, I've had a novice colleague come and put a new developer in, but he followed the 2060 procedure instead (didn't open the front door while powering up the machine and entering SP mode) and now we've spent a new developer (and a new drum after that) and still the problem ocurs - I'd very much like to avoid putting yet another developer in this machine at least until I'm sure that's where the problem lies.

- Corona wire broke (don't know why, there was no tech around) - a couple of days after getting a new wire, machine started to give SC300 until I ran drum auto adjust.
- Tried pixel count
- Tried to turn off auto-adjust

I'm all out of ideas on this - maybe ID sensor is broken?

Help please!

Cheers!

[mrwho]

Oh, and is there any place where this machine usually has the "birth certificate" stored? I can't find it anywhere...

[TonerMunkeh]

It sometimes lives behind the jam location sticker on the front door.

With regard to it overtoning, I'm willing to bet you'll be getting shedloads of SC codes registered. Can you have a look and post back? It'll give me a better idea of what's going on.

When you run 2962, I assume it says "Completed" and not "Failed". Check the result of 3902, it should be at 1 if process control has passed, which it probably hasn't.

With regard to the counter, remove the bottom right grey cover that sits under the registration section, the mechanical counter lives there. See what that says.

[tcs04]

Oh, and is there any place where this machine usually has the "birth certificate" stored? I can't find it anywhere...

My first thought is a duff NVRAM.... Maybe the battery??? Try changing some settings, For instance, input an I.P Address, then power down, reboot and see if the settings change to default.

[Eric1968]

If someone messed with the NVRAM I would order a new one, backup settings to SD-card, perform a memory clear, and reload the settings back to the new NVRAM.

[tcs04]

If someone messed with the NVRAM I would order a new one, backup settings to SD-card, perform a memory clear, and reload the settings back to the new NVRAM.

I've had NVRAM batteries go down (Not on this model) and in these cases, most of the data is gone anyway, so there is nothing to copy. If most of the data is either not there or set to default you can get a similar battery (Details from the existing battery) and solder across the terminals. I've done this and the replacement lasted a couple of years. This would at least prove that the NVRAM was the problem before ordering the new one and you could input data from another machine to get you "in the ballpark" and test the machine.

[Eric1968]

I've had NVRAM batteries go down (Not on this model) and in these cases, most of the data is gone anyway, so there is nothing to copy. If most of the data is either not there or set to default you can get a similar battery (Details from the existing battery) and solder across the terminals. I've done this and the replacement lasted a couple of years. This would at least prove that the NVRAM was the problem before ordering the new one and you could input data from another machine to get you "in the ballpark" and test the machine.

Never saw this before, but definitely something to keep in mind!

[mrwho]

I was meaning to get an NVRAM backup from another machine and use it on this one (is that even possible using just an SD Card?)

About the birth certificate, the door's jam location stickers are glued to the door, there's no chance of hiding anything behind them.

[tcs04]

I was meaning to get an NVRAM backup from another machine and use it on this one (is that even possible using just an SD Card?)

About the birth certificate, the door's jam location stickers are glued to the door, there's no chance of hiding anything behind them.

You can clone the settings, but unless the NVRAM / Battery are ok it will lose the data every time the machine is switched off. As I said, the quick test is to input something which is lost during a RAM clear and switch off, then see if it's still there.

[Oze]

There's a bulletin that relates to overtoning for this model.
It has some checks and procedures to follow....sorry I'm not at work now so I don't have the bulletin to hand but do a search for "overtoning" on the Ricoh Technical Site.
And are they using gen toner?

[teebee1234]

I seem to recall the birth certificates to either be under the control panel (underside cover?) or behind either the left or right side cover. Can't say I'm positive but it has to be somewhere.

[mrwho]

Thanks. I'll check it next time I'm next to one of those machines.

Cheers!

[bat]

Oh, and is there any place where this machine usually has the "birth certificate" stored? I can't find it anywhere...

Try Super SP Mode 5849....

[mrwho]

Try Super SP Mode 5849....

I will. Thanks.

[mrwho]

Try Super SP Mode 5849....

Well, thanks to your tip I now know the NVRAM was reset around the 17th of January of the current year.