Thanks: 
Likes: Although we can say it is an electrical problem, probably from the charge, do not discount the dirt that is stuck from the web assembly. Poor cleaning on the unit may cause the build up on the cover when paper jam occurs.
Dislikes: 0
Although we can say it is an electrical problem, probably from the charge, do not discount the dirt that is stuck from the web assembly. Poor cleaning on the unit may cause the build up on the cover when paper jam occurs.
Aye! Cut the crap
Gecko or cockroach in the optics....Originally Posted by Codex
Swat the little sod...
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Dunno with the print side of it....
What happens when you run a 100 pure blank(white) copies or prints ?
Does the blurb enlarge or reduce when you size up or size down ?
Any difference with a double patterned blurb/smudge when using A3 paper ?
Inauguration to the "AI cancel-culture" fraternity 1997...
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It is very similar to the kind of smudge produced by sunlight over the drum. I know it's almost impossible, but could it be that some light is getting through to the drum?
Enviado desde mi SM-G920V mediante Tapatalk
I have definalty seen this before and I will look for my notes but iam thinking it was the transfer belt unit.
The machine is in a very dark environment... My idea was some kind of flash or light caused by a spark i side the machine... But i have no proof of this
Inviato dal mio SM-G935F utilizzando Tapatalk
Memento Audere Semper
Could be condensation on the drum due to blocked or completely over pm ozone filters
Could be cause by an arc of electricity near the corona block. That would explain the straight edge of the blob. I would pull the power packs and check the connectors. A small crack in these connectors can cause arcs.
Plus one with that one.
My unproven theory is that it is caused by change of temperature and humidity over night while the drum sits in one place with a poor air flow over its surface. The straight line is caused by the cleaning blade blocking the air flow. We see the same often on copiers with drums nearing the end of their life, usually as a blurred patch that comes and goes and occasionally a dark patch like yours.
The only remedy is a new drum and filters then change the filters when they should be changed at every PM around 300k.
At least 50% of IT is a solution looking for a problem.
Thanks for the headsup....
You're talking about a Hydroscopic moisture type of effect . Given the warmth of the machine and cooling down at night
its an interesting probability.
Re. Drum Sweat Burn, Light Burn or Arc burn.
Wouldn't the smudge/blurb be a static constant and the exact same pattern on the drum every time for each copy?
It's interesting in that the blurb on the copy comes and goes over time with some type of regularity.
I wonder if they run a lot of labels or foils through the machine. It may account for aluminium or glue around the drum ?
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Like a well oiled TV soap opera, I'm waiting for the next exciting episode of this thread so I can find out what the fault was...
Inauguration to the "AI cancel-culture" fraternity 1997...
•••••• •••[§]• |N | € | o | M | Δ | t | π | ¡ | x | •[§]••• ••••••
interesting phenomena!
Why was there no charge at that particular place at that particular time?
1. something came between drum and charge (piece of paper?) => unlikely
2. charge went away due to power supply unit or power pack failure. => possible
3. in wich conditions is the machine standing? In a normal office? What is temperature overnight?
What is the exact time when the dot is printed? Perhaps another big machine in the factory is than put to on...?
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