700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

[James Yardley]

Hi everyone...

We've got an old 700i which in general is performing well - but there are two IQ issues that I'd like to resolve and to be honest I'm struggling with...

See attached -

Issue one - Banding across process direction, it doesn't seem very regular so I'm thinking maybe bearing, belt, gear issue somewhere?

Issue two - Colour fade from front to back, seems to be Y / C related - The image attached is a panel of light green and seems to be correct toward the top of the page (back of the machine) but falls off to a more yellow green towards the bottom of the page. I was thinking maybe the IN / OUT adjustment?

Background -

I Have PWS
IBT Belt and blade, 2nd BTR, All developer, toner have been replaced with new and genuine. Both ROS units have been removed and cleaned inside and out.

Any help or suggestions for areas to look at would be gratefully appreciated!

https://i.ibb.co/drLBzYN/IMG-4961.jpg

[xcopytech]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Is banding visible at all colors.
Print single halftone from diagnostic to see is banding visible at all colors.

Also there is adjustment in diag for in/out color balance

[James Yardley]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Thanks for the quick reply -

In / Out is now as good as it needs to be (fine tuned Y) problem is gone. (Pattern 3 - 4th step)

Banding is on all colours inc. K

[James Yardley]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

I should also say the banding is quite subtle, but completely wrecks lights hues as they become quite noticeable. At 100% you can't see them at all.

[xcopytech]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

If you have banding at all colors then check belt drive, backup roll, 2nd btr.
It will be good to stop print before transfer to see don you have defect on ibt belt

[adriansto]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

If you have banding at all colors then check belt drive, backup roll, 2nd btr.
It will be good to stop print before transfer to see don you have defect on ibt belt

Also take a look at the belt cleaner assy. Print or copy white paper ( several pages ) and see if lines appear on nonimage print/copy. IOT nvm reset is another option.

[Detonation]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

If you have this in all colors and belt cleaner and 2nd BTR are new, I'd suspect the voltage to the 2nd BTR. Also I've had bad spare parts (genuine Xerox, new in box) that just were faulty. If you can get your hands on an other 2nd BTR that might be worth trying.

[James Yardley]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Many thanks all for the suggestions -

Story so far-

Have pulled IBT assy out and inspected again for any obvious mechanical issues... Drive motor gears bearings etc etc but all seem pretty good, all moves smoothly and there is no terrible backlash between gears. Also after actually thinking about the issue as the belt only travels in one direction while transferring, any gear backlash shouldn't actually cause a line like I'm seeing?

Looked at reg unit, the sliding double spur gear idler was pretty bad, so have changed that this morning with no effect at all.....

But, an interesting thing has just happened that has made me think this could be an electronics issue - if you look at these images

IMG-4980 hosted at ImgBB — ImgBB
IMG-4981 hosted at ImgBB — ImgBB
IMG-4982 hosted at ImgBB — ImgBB

You'll see one of the sheets (out of about 50) had very very obvious deletions / corruptions across the print output... Just once but I'm thinking there could be some sort of interference / board issue somewhere? I note even on the output that is 'reasonable' these little random areas of interference are visible (again see links above)

As always any suggestions very much welcomed!

[James Yardley]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

If you have banding at all colors then check belt drive, backup roll, 2nd btr.
It will be good to stop print before transfer to see don you have defect on ibt belt

The belt does seem to show the same pattern - but it's such a slight pattern it's not that obvious.

[James Yardley]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

If you have this in all colors and belt cleaner and 2nd BTR are new, I'd suspect the voltage to the 2nd BTR. Also I've had bad spare parts (genuine Xerox, new in box) that just were faulty. If you can get your hands on an other 2nd BTR that might be worth trying.

Tried another BTR which shows same issues

[xcopytech]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Try to print 30% of each color from diagnostic mode.
Then check is defect (banding) present at all colors. If you have defect at all colors then stop print at belt and check for defect.
If defect is not present at belt then check backup roll assy.

[James Yardley]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Try to print 30% of each color from diagnostic mode.
Then check is defect (banding) present at all colors. If you have defect at all colors then stop print at belt and check for defect.
If defect is not present at belt then check backup roll assy.

Ok - Tried the above -

The fault IS showing on the IBT pre transfer and then fault is being transferred to paper pre fuser - this is on all colors.

[adriansto]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Ok - Tried the above -

The fault IS showing on the IBT pre transfer and then fault is being transferred to paper pre fuser - this is on all colors.

Sent you bulletin with high frequency banding. Not really your fault but is good to check.

[James Yardley]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Sent you bulletin with high frequency banding. Not really your fault but is good to check.

Via email?

[adriansto]

Re: 700i Two IQ issues - Struggling to resolve - Maybe me being fussy?

Via email?

Yes on email it's pdf file from bulletins.