Canon IR7105 weird copies

[landspeeder]

I have a I/R 7105 under contract that when coping or printing from any paper source and using 8.5 by 11 paper copies/prints its almost perfect.
When using 14" paper there is a void band going across the top and its quite light down the left side . I scanned each but the 14' other than showing the void area at the top doesn't show much down the side. We have changed the fuser, transfer assembly, charge wires...basically everything....but in our books if the 11" is perfect so should the 14"....makes no sense...11" paper is fed wide edge and even with narrow edge it makes no difference...14' naturally is short edge only

Sample A is the 14" paper and B is the 11" paper

[teckat]

Re: Canon IR7105 weird copies

I have a I/R 7105 under contract that when coping or printing from any paper source and using 8.5 by 11 paper copies/prints its almost perfect.
When using 14" paper there is a void band going across the top and its quite light down the left side . I scanned each but the 14' other than showing the void area at the top doesn't show much down the side. We have changed the fuser, transfer assembly, charge wires...basically everything....but in our books if the 11" is perfect so should the 14"....makes no sense...11" paper is fed wide edge and even with narrow edge it makes no difference...14' naturally is short edge only

Sample A is the 14" paper and B is the 11" paper

Is 8.50x14 set as plain paper_?

[Iowatech]

Re: Canon IR7105 weird copies

I haven't worked on Canon equipment for years, but for all the world it looks like your examples show a drum charge problem. If that machine uses a PCU and you have one around, after people that have way more experience with that machine than I do suggest things you might want to try replacing that.
But, and this is important, don't do that unless someone who actually has experience on that machine says it is a good idea.

[landspeeder]

Re: Canon IR7105 weird copies

I haven't worked on Canon equipment for years, but for all the world it looks like your examples show a drum charge problem. If that machine uses a PCU and you have one around, after people that have way more experience with that machine than I do suggest things you might want to try replacing that.
But, and this is important, don't do that unless someone who actually has experience on that machine says it is a good idea.

The paper type is set as plain....the drum was changed about 2 yrs ago. and it was about $1500. so I cant swap it to see what happins...no Christmas bonus for the next 10yrs. if I did that.....
I am supposed to go onsite tomorrow, 1/ to get roasted of coarse as its our fault..........2/ to swap the laser and dev. unit and see what happins.

Any more ideas would be appreciated...hmmmm a greeter a Walmart...kinda cool

[teckat]

Re: Canon IR7105 weird copies

LGL.jpg


LTR.jpg




How were these copies made ????

[landspeeder]

Re: Canon IR7105 weird copies

[QUOTE=teckat;480142]LGL.jpg


LTR.jpg




How were these copies made ????[/QUOTE

If you make a 14" copy or a send a 14" print job you get the bad 14" print. If I move the paper to a different drawer makes no difference. Doesnt do it on 11 by 17 either, just the 14" ...

[teckat]

Re: Canon IR7105 weird copies

Have u tried on heavy stock of available_?

Have you tried a DCon clear_?

Print out a P PRINT with settings before the clear,
& reinput the DC settings.

[landspeeder]

Re: Canon IR7105 weird copies

No diff. also I made a mistake in my original post......8 by 11.5" is the only one that prints good....14" and 11 by 17" suck.......almost blank

[landspeeder]

Re: Canon IR7105 weird copies

No diff. also I made a mistake in my original post......8 by 11.5" is the only one that prints good....14" and 11 by 17" suck.......almost blank

When printing on a 11" vs 14"...what if any are the differences? Paper is longer....but does timing change, voltage, etc. something that would cause the image to fail..

Also I changed the laser and dev unit this morning with no difference!!!

[vigour]

Re: Canon IR7105 weird copies

Try running from manual feed.
Run letter in both directions in either tray 3 or 4

[teckat]

Re: Canon IR7105 weird copies

When printing on a 11" vs 14"...what if any are the differences? Paper is longer....but does timing change, voltage, etc. something that would cause the image to fail..

Also I changed the laser and dev unit this morning with no difference!!!

--------------------------------------------
I would eliminate the Laser------------
Plain Paper & Sizes should have nothing to do with issue--------------

Unless printer thinks it's passing a transparency (- COPIER> OPTION> BODY> OHP-CNT (enabling/disabling potential control for transparency mode)
1: uses the target value obtained as a result of potential control for transparency mode executed at time of transparency mode operation. (default)
0: does not execute potential control for transparency mode.

first u need to see if it's a issue with >

Primary charging /
Transfer charging
or Separation charging

did u try this >>>disable potential> run testing
COPIER> OPTION> BODY> PO-CNT (enabling/disabling potential control)
0: potential control OFF
1: potential control ON (default)


just a thought

make sure the values (5 types) indicated on the label attached to HV-DC PCB are same /matched in service mode items:
[1] COPIER > ADJUST > HV-TR > H-PRE-TR
[2] COPIER > ADJUST > HV-TR > HVT-TR
[3] COPIER > ADJUST > HV-SP > HVT-SP
[4] COPIER > ADJUST > DEVELOP > HVT-DE
[5] COPIER > ADJUST > DEVELOP > OFFSETAC

HVT.jpg

[spectraindo]

Re: Canon IR7105 weird copies

It looks like a transfer problem.
Try this :
1. In Service Mode : COPIER > OPTION > BODY > TRNSG-SW SET TO 2
2. COPIER > OPTION > BODY > TR-SP-Cx where x is the number of the cassette where the 14" paper is loaded, change to 1 or 3