C6501 yellow lines and scratches on drums...

[inkhouse]

Hello , i got a c6501 and i have 2 problems:
1) i got yellow lines in the background on the left side of paper only and few vertical lines all over the paper no matter what i print
2)drum got scratch on left side after 200 print paper and its become worse the more paper i print

i have read most of the post here and i have try many solutions (corona replacement, drum preposition,dv swap place,i clean all the lens sensor etc.) still i got same problem even when i change new drum i got lines at 1st print in the same spots ...
any can help me !!tnxxx
42663

[Synthohol]

sorry, that attachment is horrible.
please attach a full size sample.

[Toxic]

Drum have contact with developing unit and transfer belt so did you check and replace something in TBU (belt,1st tr. rollers...) ?
Is the damage visible and always on Y drum?

[inkhouse]

Hello , thanks for the fast answer here is new pics..

C6501 - Album on Imgur (https://imgur.com/a/jbIVkMZ)


let me know if u can see pics

[Synthohol]

looks like corona damage to me.

[inkhouse]

Well... i thought that too but i replace them and still got the same result

[Synthohol]

6501 the corona height is adjustable IIRC, did anyone mess with the screw?
is it OEM toner and developer? maybe a bad bottle of toner that made little stones that scratch it?
how does the mag roller look?

[Toxic]

If i see good you are using replacement drums,not complete OEM drum unit?
Have you replace only drum or drum and drum cleaning blade because it looks like cleaning blade damaging drum?
Can you wipe this yellow lines or its physical damage on drum surface?
I use only OEM DU-104 on this 5501/6501 and never have problems,they last for 200-300% over life without quality issue.

[sadanand]

Blade flipping problem check Drum cleaning blade

[inkhouse]

6501 the corona height is adjustable IIRC, did anyone mess with the screw?
is it OEM toner and developer? maybe a bad bottle of toner that made little stones that scratch it?
how does the mag roller look?


this screw is on the slot of corona on in drum unit?
this problem start before i replace anything on the machine

[inkhouse]

If i see good you are using replacement drums,not complete OEM drum unit?
Have you replace only drum or drum and drum cleaning blade because it looks like cleaning blade damaging drum?
Can you wipe this yellow lines or its physical damage on drum surface?
I use only OEM DU-104 on this 5501/6501 and never have problems,they last for 200-300% over life without quality issue.

i replace drum with blade always i tried both oem and long life drums same result lines start at 1st print ,scratches after 200 pages.
i cant wipe them i tried its permanent.

[inkhouse]

Blade flipping problem check Drum cleaning blade

i have replace the the yellow blade 3 times same result the thing is like i said i can see this lines on print even before the drum show scratches...

[sadanand]

Change developer and toner ,because that is the only thing touching drum ,also check telloe transfer rolller in ibt section

[methogod]

DU102 drums only.

do not use DU104.

make sure your removing the red screws from the drums when replacing.

what is meter/life of DV unit? DV?

[inkhouse]

DU102 drums only.

do not use DU104.

make sure your removing the red screws from the drums when replacing.

what is meter/life of DV unit? DV?

what red screws?

[Gaffers01]

You really should have someone look at that machine that knows what there doing.
The red headed screws are at either end of the drum unit to keep the dcb blade of the drum while in transport.

[inkhouse]

You really should have someone look at that machine that knows what there doing.
The red headed screws are at either end of the drum unit to keep the dcb blade of the drum while in transport.

i have the drum in front of me ..i can see the screws that hold the blade ..there is no red heading screw ,only vlack and silver

[sadanand]

i have the drum in front of me ..i can see the screws that hold the blade ..there is no red heading screw ,only vlack and silver

Dear Sir those screws are only with new drum unit before installing

[inkhouse]

Dear Sir those screws are only with new drum unit before installing

i replace only drum not drum unit ..i havent change the whole unit.

[inkhouse]

UPDATE:
i replace the drum unit (i removed the red screws) the big think yellow toner lines fixed but still i got this line in the same spot

Drum lines - Album on Imgur (https://imgur.com/a/Pz3DWYZ)

[raplma]

One thing to check would be the transfer belt for scoring...

[Phil B.]

i have replace the the yellow blade 3 times same result the thing is like i said i can see this lines on print even before the drum show scratches...

are you putting dusting powder on the drum n blade when reassembling ? if not that could cause the scratches.

[inkhouse]

are you putting dusting powder on the drum n blade when reassembling ? if not that could cause the scratches.
Yes ,also i initial drum rotation to apply powder

[Phil B.]

Yes ,also i initial drum rotation to apply powderNot turning drum by hand?

Sent from my SM-G960U using Tapatalk

[methogod]

where are you buying drums? what are the dates on the failing drums...

[inkhouse]

Problem solved!!! thx all for ur help.
i change the drum unit and the yellow think lines and the scratches on drum gone..
then i clean the area below dev unit and the other thin lines gone!!!


tnx all cheers