I went to a customer site to replace a Magenta Drum/Dev unit that was failing, had reached the end of its life and was leaving massive magenta streaks across the entire page.
After i replaced the unit, i printed off a bunch of test pages not really sure what to make of them. If i just print out one test page, the fault is minor. However, if i print out consecutive multiple test pages, things get pretty ugly pretty quick.
I've attached PDF's of the test prints:
Test 1:test 1.pdf
You can see that at the top right of this page there is minor streaking and smudging with what looks like the K drum unit... by the eight print out it moves all the way across the page.
Test 2:test 2.pdf
This one is more obvious, and only seems to occur where the grey boxes are darkest... by the 15th print it is an extreme image fault.
Test 3:test 3.pdf
The first image looks okay, the second image looks like the K drum/ dev unit is at fault, by the fifteenth image it extends across the entire page with Cyan as well as Black.
Test 4:test 4.pdf
The first image you can see faded spots or voids throughout the magenta and the cyan... this magenta unit was brand new, just installed.
The second image is okay with the exception of the magenta colour registration... actually i thought this one was kind of odd, considering how bad some of the other test prints were, i printed off multiple copies of this and the only fault is the magenta registration.
This third image again highlights the magenta registration, how it is just slightly off and you can see a white void between the magenta and the cyan.
At the moment, the only complaint from the customer is that the magenta registration is off, so some of the documents they print have a small red shadow effect.
Really stuck with this one, initially i tried swapping out the K-Drum/ Dev unit with another machine, but the fault stayed with machine. All of the Drum/ Dev units are relatively new. I pulled out, inspected the ITB and the ITB cleaning blade... again both reletively new. The ITB is not even at 50% yet, and i changed all of its components out myself. Fixing Unit is at about 25%
How does somebody go about correcting colour registration?
Any ideas on the other image faults? Waste toner? dragging in the fixing unit? Something with the ITB i maybe missed?
After i replaced the unit, i printed off a bunch of test pages not really sure what to make of them. If i just print out one test page, the fault is minor. However, if i print out consecutive multiple test pages, things get pretty ugly pretty quick.
I've attached PDF's of the test prints:
Test 1:test 1.pdf
You can see that at the top right of this page there is minor streaking and smudging with what looks like the K drum unit... by the eight print out it moves all the way across the page.
Test 2:test 2.pdf
This one is more obvious, and only seems to occur where the grey boxes are darkest... by the 15th print it is an extreme image fault.
Test 3:test 3.pdf
The first image looks okay, the second image looks like the K drum/ dev unit is at fault, by the fifteenth image it extends across the entire page with Cyan as well as Black.
Test 4:test 4.pdf
The first image you can see faded spots or voids throughout the magenta and the cyan... this magenta unit was brand new, just installed.
The second image is okay with the exception of the magenta colour registration... actually i thought this one was kind of odd, considering how bad some of the other test prints were, i printed off multiple copies of this and the only fault is the magenta registration.
This third image again highlights the magenta registration, how it is just slightly off and you can see a white void between the magenta and the cyan.
At the moment, the only complaint from the customer is that the magenta registration is off, so some of the documents they print have a small red shadow effect.
Really stuck with this one, initially i tried swapping out the K-Drum/ Dev unit with another machine, but the fault stayed with machine. All of the Drum/ Dev units are relatively new. I pulled out, inspected the ITB and the ITB cleaning blade... again both reletively new. The ITB is not even at 50% yet, and i changed all of its components out myself. Fixing Unit is at about 25%
How does somebody go about correcting colour registration?
Any ideas on the other image faults? Waste toner? dragging in the fixing unit? Something with the ITB i maybe missed?
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