MX-5070N very intermittent 3/4 voids

[bigdaddyooo]

Ok, got a good one. Very intermittent copies like this. There is no change in void area. All bad copies or prints are EXACTLY the same void area. Ive tried a new transfer unit, TC pwb and removed the toner cart to check the spring contracts underneath which were very clean. This might happen 1 in a thousand or 5 in a 100. No rhyme or reason. Any suggestions





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[copiertec]

Re: MX-5070N very intermittent 3/4 voids

have you tested AC outlet for proper voltage and ground?

[bigdaddyooo]

Re: MX-5070N very intermittent 3/4 voids

have you tested AC outlet for proper voltage and ground?

absolutely

[driving lots of miles]

Re: MX-5070N very intermittent 3/4 voids

absolutely

is it a dedicated AC line to the copier or is there a possibility of an air conditioner or refrigerator coming on intermittingly?

[tedtech]

Re: MX-5070N very intermittent 3/4 voids

Is the machine near a window with direct sunlight? I had one doing this and it ended up being the sun blasting in on the machine certain times of the day.

[mloudy]

Re: MX-5070N very intermittent 3/4 voids

Being random it could be a electrical issue that checking the volatge at the wall will not find. When you said you checked the AC and ground was a one time check or do you have a device on the circuit monitoring it? Could also be an amperage drop which most testing/monitoring equipment will not detect/record.

I am not saying it is bad power but it could be. Extremely difficult to find the reason behind an issue like this as it is so random. If it wasn't exact in when it voids I am sure you would get more suggestions. Something failing or shorting out would seem to vary the void.

[Prints Charming]

Re: MX-5070N very intermittent 3/4 voids

I've had this before.
Secondary Transfer Separation Clutch was slipping, causing the Transfer Roller to drop away from the Primary Transfer Belt.
The image loss position on the page was the same, no trouble codes, just sudden image loss.
The clutch was slipping just enough to cause a problem, but no trouble code. Swapped out Secondary Transfer Unit as a test, problem solved.

[harps05]

Re: MX-5070N very intermittent 3/4 voids

^^^^ Agree with Prince on this. Had this problem also.

[bigdaddyooo]

Re: MX-5070N very intermittent 3/4 voids

OK, so I replaced TC2 and the drive clutch. It did the voiding thing again this morning so I dont know what to do now. PCU maybe? It seems to void when the lead edge enters the fuser.

[OlliK1969]

Re: MX-5070N very intermittent 3/4 voids

Hi

Have you changed the drum unit yet? It looks to me as if the delete bar comes on in between. Had something similar years ago on an MX-M1100

[bigdaddyooo]

Re: MX-5070N very intermittent 3/4 voids

Do you mean the discharge led?

Hi

Have you changed the drum unit yet? It looks to me as if the delete bar comes on in between. Had something similar years ago on an MX-M1100

[Prints Charming]

Re: MX-5070N very intermittent 3/4 voids

Discharge Lamp is after Cleaning Blade, so it can't affect this symptom in theory of operation.
I still believe this is a transfer issue, as I've seen this before. The Secondary Transfer Unit and clutch have been replaced, but I'd now look at Primary Transfer Clutch on the Main Drive Unit. If that's slipping, the transfer rollers within the Primary Belt Unit will pull away from the drum, causing a sudden loss of image on the page.

[bigdaddyooo]

Re: MX-5070N very intermittent 3/4 voids

Discharge Lamp is after Cleaning Blade, so it can't affect this symptom in theory of operation.
I still believe this is a transfer issue, as I've seen this before. The Secondary Transfer Unit and clutch have been replaced, but I'd now look at Primary Transfer Clutch on the Main Drive Unit. If that's slipping, the transfer rollers within the Primary Belt Unit will pull away from the drum, causing a sudden loss of image on the page.

This is exactly where we are going to. will let you know

[Andypraeuner]

Re: MX-5070N very intermittent 3/4 voids

I had a MX3071 do the same thing a couple years ago turned out that the fuser drive, transfer drive, and delivery drive units were loose because the screw points in the frame were cracked, like the machine had been bounced too hard during shipping. It started doing this about a month after install at the customers location.

[bigdaddyooo]

Re: MX-5070N very intermittent 3/4 voids

Discharge Lamp is after Cleaning Blade, so it can't affect this symptom in theory of operation.
I still believe this is a transfer issue, as I've seen this before. The Secondary Transfer Unit and clutch have been replaced, but I'd now look at Primary Transfer Clutch on the Main Drive Unit. If that's slipping, the transfer rollers within the Primary Belt Unit will pull away from the drum, causing a sudden loss of image on the page.

Prints, if that does happen isn't it supposed to code out? If the clutch slips and the flag comes out of the sensor I would assume you should get an error code, correct?