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rrrohan
11-20-2019, 02:36 AM
https://1drv.ms/u/s!Ah_79nptMOdw5GIWlNrCSUEdNKLR?e=UMJi45

see attached PDF's

This is Halftone at 50

Ive swapped parts with another 958 and the fault stays with this copier

I did
ITBU
ITRU
Fuser
Drum
Dev

Would you say this is a power issue?

Synthohol
11-20-2019, 03:41 AM
can you print on A3/11x17 and does the blorb repeat?

rrrohan
11-20-2019, 03:57 AM
i never tried on A4 but thats only because it defaulted to A3 and I didnt think the paper size would matter
almost all the customers prints are A3 booklets

Do you think its worth me going back to test on A4 and if so why.

The blobs dont repeat, they change all the time.

elmaligno
12-05-2019, 04:50 PM
i never tried on A4 but thats only because it defaulted to A3 and I didnt think the paper size would matter
almost all the customers prints are A3 booklets

Do you think its worth me going back to test on A4 and if so why.

The blobs dont repeat, they change all the time.
Try to change fuser speed.

allan
12-06-2019, 03:14 PM
Does those areas feel gritty?
Could be developer on the prints.
In that case it could be a bad HV contact at the back?

EarthKmTech
12-07-2019, 12:12 AM
Try to change fuser speed.

This, and make sure loop sensor near transfer roller isnt broken.

blackcat4866
12-07-2019, 02:54 AM
If it's fuser speed, the buckle is changing as the paper is passing the drum. A misaligned fuser can cause the paper to track to the front or rear causing the paper to pull away from the drum. A4 LEF is very short in the feed direction, and doesn't get much of an opportunity to track off center (you shouldn't see much of an effect on A4 LEF).

A bad connection at the second transfer can cause a curved void all the way across the page. very similar to what you're seeing.

Are you getting any jams or errors? =^..^=

Phil B.
12-07-2019, 04:14 AM
i never tried on A4 but thats only because it defaulted to A3 and I didnt think the paper size would matter
almost all the customers prints are A3 booklets

Do you think its worth me going back to test on A4 and if so why.

The blobs dont repeat, they change all the time.

the A3 would show 'repetitive defects' in ALL image process units, A3 = 11x17 LGL

A4 = 8.5x11 shorter media SEF LTR

rrrohan
12-07-2019, 07:11 AM
Does those areas feel gritty?
Could be developer on the prints.
In that case it could be a bad HV contact at the back?

not gritty at all


If it's fuser speed, the buckle is changing as the paper is passing the drum. A misaligned fuser can cause the paper to track to the front or rear causing the paper to pull away from the drum. A4 LEF is very short in the feed direction, and doesn't get much of an opportunity to track off center (you shouldn't see much of an effect on A4 LEF).

A bad connection at the second transfer can cause a curved void all the way across the page. very similar to what you're seeing.

Are you getting any jams or errors? =^..^=

nah no jams, no errors.

what do you mean by misaligned fuser? didnt think there was any adjustment, it just screws in.
yeah i went back and tried A4, and its perfectly ok on A4 portrait.

blackcat4866
12-07-2019, 12:50 PM
There were some Kyoceras with fuser alignment issues, that produced a similar effect. Not bizhubs. Just speculating.

I'd try adjusting fuser speed. =^..^=

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