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KeepItPrinting.com
The "unofficial' and "unauthorized" KIP info site.
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SHORTROUND
resident
Joined: 23 Mar 2005
Posts: 155
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 Posted: Wed Feb 12, 2014 8:32 pm Post subject: light prints with double image |
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i have a 7770 that the prints are coming out light almost kind of grainy also it also is printing a repeat ghost image. Machine has about 125000 sq feet. I have cleaned the machine and checked the voltages on the HVT. They are good. they have another 7770 sitting next to it so i have swapped parts. i have swapped the Transfer and charger assy. the developer unit and drum.
any ideas???? HELP |
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SHORTROUND
resident
Joined: 23 Mar 2005
Posts: 155
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| Posted: Tue Mar 11, 2014 1:02 am Post subject: light prints with double image |
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Well Kip finally sent me this info. The voltage in the manual says it should read 1.30 volts. I changed voltage to about 0.65v and the prints look great. the Tr. wire hight was set to 12mm already.
Currently there is a misprint in the service manual. The correct Tr. voltage for the 7770 is 0.70v and 0.95v for the 7970. This will be corrected in the next version up of the service manuals, but I don’t have an ETA for that just yet.
For people who are having problems with light prints and repeat image, it is recommended to set the Tr. Wire height to 12mm and the Tr. voltage to 0.50v. This will most likely be published as a Tech Tip in the near future. |
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dlee
doctor
Joined: 07 Nov 2006
Posts: 1459
Location: E. Syracuse NY
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| Posted: Tue Mar 11, 2014 9:41 am Post subject: |
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| Thanks for sharing this very helpful info. |
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