IR7095 fading on 11x17

[charrex1]

Hey guys,

I need some expert assistance. I am working on a IR7095 and when I print test page 7, to test solids, letter size seems fine but 11x17 is very faded with some blank areas. Here is a scan of the document.
20130725150344.pdf
I have searched the forum for some ideas and haved tried everything I found. I have checked the drum potential and it seems to be within range. VLT is 62, VLM is 67. VDM is 397, VDT is 405. I have swapped the laser, primary corona, pre-transfer, trans-sep, process unit with the drum, DV unit. I checked the dust proof glass and cleaned it. I checked the blanking lamps and they are coming on. I also swapped the HVT, High Voltage board, HV-AC board and the DC Controller. I checked the transfer corona block and it looks good and clean. No breaks or cracks. I'm at a loss. Does anyone have any suggestions? Why would letter size be fine, but not 11x17? Thanks for any help you can give me.

[mr.daus]

Re: IR7095 fading on 11x17

Hey guys,

I need some expert assistance. I am working on a IR7095 and when I print test page 7, to test solids, letter size seems fine but 11x17 is very faded with some blank areas. Here is a scan of the document.
[ATTACH]21577[/ATTACH]
I have searched the forum for some ideas and haved tried everything I found. I have checked the drum potential and it seems to be within range. VLT is 62, VLM is 67. VDM is 397, VDT is 405. I have swapped the laser, primary corona, pre-transfer, trans-sep, process unit with the drum, DV unit. I checked the dust proof glass and cleaned it. I checked the blanking lamps and they are coming on. I also swapped the HVT, High Voltage board, HV-AC board and the DC Controller. I checked the transfer corona block and it looks good and clean. No breaks or cracks. I'm at a loss. Does anyone have any suggestions? Why would letter size be fine, but not 11x17? Thanks for any help you can give me.

if you've tried to change the paper size 11x17 with a new one?
there is a possibility that the size of the paper has a higher moisture content than the other papers

[creatinchaos]

Re: IR7095 fading on 11x17

1) Try running a halftone test print ( PG type 5 ). Check Copier> Option> Body> DEV-SLOW and set from 2 to 1. Run another test print PG5. If the amount of Bands on the 11x17 sheet changes from 5 to 7 ( or a change in the pattern ) then suspect the developer unit. Try replacing Developer Cylinder and Collars.

2) Also, check your fuser drive gear for cracks or teeth wear. Check your 52T fuser gear as well. Usually the fuser gear issue causes blurred text or smearing at the trail edge, this does not seem like your issue but it's worth checking out.

3) Finally, check to see if the Lower Transfer Guide is too low. There are two adjusting posts that are slotted. 21713.jpg These posts adjust the height of the Lower Transfer Guide. Check to see if the posts are at the mid-point. They may be all the way to the left (lowest setting). If they are, loosen the locking screw and move to the mid-point position. Take care when tightening the rear screw, over tightening will cause guide to move to the lowest position. If you move the post to far to the right, the blur may shift to the lead edge. This sounds a lot like your issue, good luck and post back your results.

[Abrantes]

Re: IR7095 fading on 11x17

make some blank copy at 11x17" paper, put it back and make PG 5 haltone pattern print at the same paper sheet, if it shows better or solve the problem your paper has high moisture: buy a new paper.

if the problem doesn't change it should be a transfer problem as explained before: clean the transfer/detac unit and change wires or change the unit.

[charrex1]

Re: IR7095 fading on 11x17

1) Try running a halftone test print ( PG type 5 ). Check Copier> Option> Body> DEV-SLOW and set from 2 to 1. Run another test print PG5. If the amount of Bands on the 11x17 sheet changes from 5 to 7 ( or a change in the pattern ) then suspect the developer unit. Try replacing Developer Cylinder and Collars.

2) Also, check your fuser drive gear for cracks or teeth wear. Check your 52T fuser gear as well. Usually the fuser gear issue causes blurred text or smearing at the trail edge, this does not seem like your issue but it's worth checking out.

3) Finally, check to see if the Lower Transfer Guide is too low. There are two adjusting posts that are slotted. [ATTACH=CONFIG]21583[/ATTACH] These posts adjust the height of the Lower Transfer Guide. Check to see if the posts are at the mid-point. They may be all the way to the left (lowest setting). If they are, loosen the locking screw and move to the mid-point position. Take care when tightening the rear screw, over tightening will cause guide to move to the lowest position. If you move the post to far to the right, the blur may shift to the lead edge. This sounds a lot like your issue, good luck and post back your results.

I tried running test page 5, changing DEV-SLOW to 1 and test page 5 again. No change there. I had already swapped the DV unit.

I checked the fuser gear. It's fine.

As far as the Lower Transfer Guide, am I adjusting the right place? There are 2 black screws above 2 slots beneath the clutch on the right when you remove the cover in front of the transfer unit. I don't see any adjusting posts. I can't find this adjustment in the service manual. If that is correct, I have tried adjusting it several ways and it doesn't seem to make any difference.

[charrex1]

Re: IR7095 fading on 11x17

if you've tried to change the paper size 11x17 with a new one?
there is a possibility that the size of the paper has a higher moisture content than the other papers

I have tried several different batches of 11x17 paper. The image changes a little, but not much.

[charrex1]

Re: IR7095 fading on 11x17

make some blank copy at 11x17" paper, put it back and make PG 5 haltone pattern print at the same paper sheet, if it shows better or solve the problem your paper has high moisture: buy a new paper.

if the problem doesn't change it should be a transfer problem as explained before: clean the transfer/detac unit and change wires or change the unit.

I made some blank copies on 11x17 and put it back for the test page and it definitely improved. But now my letter size paper is having the same problem. I will see if I have any unopened paper to try. I work in a warehouse testing machines and most of the paper I have comes out of the machines.

[rt3tech]

Re: IR7095 fading on 11x17

Since you have replaced all the usually electro-static components etc., I would look closely at the fixing assy and the inversion/switchback rollers/area. Swap the whole middle tray with a known good. Narrow this symptom down more.

[canonbundy]

Re: IR7095 fading on 11x17

Hey guys,

I need some expert assistance. I am working on a IR7095 and when I print test page 7, to test solids, letter size seems fine but 11x17 is very faded with some blank areas. Here is a scan of the document.
[ATTACH]21577[/ATTACH]
I have searched the forum for some ideas and haved tried everything I found. I have checked the drum potential and it seems to be within range. VLT is 62, VLM is 67. VDM is 397, VDT is 405. I have swapped the laser, primary corona, pre-transfer, trans-sep, process unit with the drum, DV unit. I checked the dust proof glass and cleaned it. I checked the blanking lamps and they are coming on. I also swapped the HVT, High Voltage board, HV-AC board and the DC Controller. I checked the transfer corona block and it looks good and clean. No breaks or cracks. I'm at a loss. Does anyone have any suggestions? Why would letter size be fine, but not 11x17? Thanks for any help you can give me.

Remove & inspect the HV Block for cracks & arcing, located at the rear of the Fixing Frame assy that the T/Sep Unit plugs into.

[Canuck]

Re: IR7095 fading on 11x17

How many copies on fuser rolls,especially pressure roll? I would replace them as a start. They could be causing the paper buckle up when the fuser grabs lead edge and trail edge is still under reg roll. Eventually get wrinkles in the paper. If that don't help, make sure varistor on transfer guide is not open. Lastly change the upper reg roll(haven-t seen it on this series but change them all the time for deletions on legal and 17 inch on ir5000,5570,5075,etc)

[charrex1]

Re: IR7095 fading on 11x17

Hey guys,

Sorry I didn't get back to you sooner. I got the problem resolved. It did turn out the majority of the problem was the paper. I tried several types and it didn't change much, but I finally found some that was much fresher and higher quality. I know the CLC's are very sensitive to paper, but this is the first black and white machine that has been so sensitive. I also cleaned the transfer corona thoroughly and I was having some streaking problems due to a hair above the drum, but everything seems to be good now. Thanks for all of your assistance.

[Brian8506]

Re: IR7095 fading on 11x17

Had I seen this earlier, I would have gone right for the paper too. The sample looks like moisture and if you're in Fla this time of year in a warehouse, it's a good bet that you got high humidity. At least it's fixed.

[canonbundy]

Re: IR7095 fading on 11x17

Hey guys,

Sorry I didn't get back to you sooner. I got the problem resolved. It did turn out the majority of the problem was the paper. I tried several types and it didn't change much, but I finally found some that was much fresher and higher quality. I know the CLC's are very sensitive to paper, but this is the first black and white machine that has been so sensitive. I also cleaned the transfer corona thoroughly and I was having some streaking problems due to a hair above the drum, but everything seems to be good now. Thanks for all of your assistance.

The 'HAIR' above the Drum was probably a Charge Wire from the T/S Unit.