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721production
medical school freshman
Joined: 03 Jun 2010
Posts: 22
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 Posted: Mon Feb 22, 2016 5:32 pm Post subject: 721 is arching |
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Hi Everyone
New problem with one of my 721's. The machine started printing big black blotches randomly on the prints, so I replaced the wires on the main charge wire and it went away. Few days later and they are back. Sometimes just get a solid black print. I tried taking all components out of my one machine which is working perfectly and still getting the same results. I checked the voltage to the HVPS 1 board and it gets 2.0 volts but then will drop as you can here the drum arching. I even had the top cover off and watched it print and you can see the top charge wire is arching. My question is any idea what could be causing it to arch?
Thanks |
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james
resident
Joined: 10 Dec 2005
Posts: 249
Location: So Calif
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| Posted: Mon Feb 22, 2016 9:19 pm Post subject: |
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We get arching when the dry hot winds come to town (Santa Ana Winds). I've tried several different things with cleaning the shield which seemed to help like Gojo.
I finally got a humidifier and we fire it up on the dry days. That seems to work the best for us. It's a somewhat large roll around unit.
Once we see archs, we turn it on and about 20 mins we are able to print without arching.
Is the air dry and warm where you are? |
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721production
medical school freshman
Joined: 03 Jun 2010
Posts: 22
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| Posted: Tue Feb 23, 2016 3:56 pm Post subject: |
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| james wrote: |
We get arching when the dry hot winds come to town (Santa Ana Winds). I've tried several different things with cleaning the shield which seemed to help like Gojo.
I finally got a humidifier and we fire it up on the dry days. That seems to work the best for us. It's a somewhat large roll around unit.
Once we see archs, we turn it on and about 20 mins we are able to print without arching.
Is the air dry and warm where you are? |
It's not no, we are up in Canada so it is very cold at the moment. It has been a very strange winter for us being 65 degrees one day then 0 degrees the next. I will give the humidifier a chance since we had print quality issues on another machine a few years ago and the humidifier solved the issue. Thanks for the tip! I will post any updates I have. |
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james
resident
Joined: 10 Dec 2005
Posts: 249
Location: So Calif
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| Posted: Tue Feb 23, 2016 7:02 pm Post subject: |
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| Do you run room heaters because of the cold, maybe drying the air out too much. I think we get arcing from dry warm air creating static. I get static shocks all the time when the dry winds come. |
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gjames
resident
Joined: 02 Apr 2008
Posts: 174
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| Posted: Mon Aug 29, 2016 11:56 pm Post subject: |
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We are also plagued with the dry climate issues. You can try this product. Seems to do a good job when the static builds up.
http://www.brillianize.com/Pages/LandingPages/photocopier.html
_________________
"The bitterness of poor quality remains long after the sweetness of low price is forgotten." - Benjamin Franklin and John Ruskin |
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