 |
|
|
|
|
|
|
|
|
|
Federalgraphics Ben
medical school freshman
Joined: 12 Mar 2015
Posts: 12
|
 Posted: Tue Jul 07, 2015 4:43 pm Post subject: Void splotches down the left and right edges |
  |
|
Original problem was a ding on the drum so I replaced the drum. When I put it back together there were fading void areas about as big as my fist repeating about every 4 inches in a wavy pattern down the left and right side of the page. It happens with all paper sizes. I put the old drum back in since it was not doing this before and it did the same thing.
- I cleaned the led print head
- I rebuilt the developing unit
- I replaced the transfer/separation wires
- I replaced the Corona Wire
- I rebuilt the fusing unit
.....any ideas? |
|
| |
|
|
|
|
|
|
|
|
gjames
resident
Joined: 02 Apr 2008
Posts: 174
|
| Posted: Tue Jul 07, 2015 11:19 pm Post subject: Re: Void splotches down the left and right edges |
|
|
| Federalgraphics Ben wrote: |
Original problem was a ding on the drum so I replaced the drum. When I put it back together there were fading void areas about as big as my fist repeating about every 4 inches in a wavy pattern down the left and right side of the page. It happens with all paper sizes. I put the old drum back in since it was not doing this before and it did the same thing.
- I cleaned the led print head
- I rebuilt the developing unit
- I replaced the transfer/separation wires
- I replaced the Corona Wire
- I rebuilt the fusing unit
.....any ideas? |
It sounds like the Transfer/Separation Corona (below the drum). I have seen this issue on older equipment from KIP.
Inspect that unit. Check for toner buildup especially around the guide plate. And you might need to check and adjust wire height.
_________________
"The bitterness of poor quality remains long after the sweetness of low price is forgotten." - Benjamin Franklin and John Ruskin |
|
| |
|
|
|
|
|
|
|
|
dlee
doctor
Joined: 07 Nov 2006
Posts: 1459
Location: E. Syracuse NY
|
| Posted: Wed Jul 08, 2015 11:29 am Post subject: |
|
|
| Did you check to see if the aluminum blocks that hold the drum are flush against the wall? If the blocks are not flush, it can make the drum "loop" when it rotates, creating a blank/void when the drum loops away from the paper. |
|
| |
|
|
|
|
|
|
|
|
Federalgraphics Ben
medical school freshman
Joined: 12 Mar 2015
Posts: 12
|
| Posted: Wed Jul 08, 2015 11:29 am Post subject: thanks |
|
|
The transfer/separation corona looks very clean and as I said the wires have just been replaced. The height was not changed but I will double check to make sure it is correct.
The fact that it repeats down the page has me very baffled. |
|
| |
|
|
|
|
|
|
|
|
Federalgraphics Ben
medical school freshman
Joined: 12 Mar 2015
Posts: 12
|
| Posted: Wed Jul 08, 2015 11:31 am Post subject: |
|
|
| Thanks dlee, I'll check that out. |
|
| |
|
|
|
|
|
|
|
|
Federalgraphics Ben
medical school freshman
Joined: 12 Mar 2015
Posts: 12
|
| Posted: Wed Jul 15, 2015 9:50 am Post subject: Still no luck |
|
|
Now I have replaced the Transfer/Separation assembly and I put a new grid on the charging corona assembly. Image is still disappearing from both side edges of the print, regardless of paper size. The overall image density seems to be dark and the washed out edges seem to be worse on a print with a lot of coverage. Maybe something to do with developer bias?
Any more ideas? I'm out. |
|
| |
|
|
|
|
|
|
|
|
gjames
resident
Joined: 02 Apr 2008
Posts: 174
|
| Posted: Wed Jul 15, 2015 10:15 am Post subject: |
|
|
Possibly I have also seen something similar when the LED head is out of focus.
For the bias issue you could check the power supply. On a 6000 I had a cold solder joint on one of the connections to the bias and print quality was terrible and there were no shorts.
_________________
"The bitterness of poor quality remains long after the sweetness of low price is forgotten." - Benjamin Franklin and John Ruskin |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
