Prints-density color problem. C452

[menosmola]

I have a problem with a konica minolta C452.
As you can see in attached examples, the beginning of prints are lighters.
I check belt, transfer roller, and laser, but i cant solve the problem.
Any idea?

[mo0651]

Those prints are ran thru in portrait direction? Did you do a stop test?

[Synthohol]

There is an adjustment for 2nd transfer lead edge I believe.
Play with those numbers and see what changes.

[menosmola]

Those prints are ran thru in portrait direction? Did you do a stop test?
Yes, portrait direction.
No i didnt stop test. Best way to do stop test?

[menosmola]

There is an adjustment for 2nd transfer lead edge I believe.
Play with those numbers and see what changes.
I play but nothing change...

[tehrancopy.com]

have you tried cleaning your second transfer roller ?

[menosmola]

have you tried cleaning your second transfer roller ?

Yes, i change for 1 new transfer roller...

[DigiMan]

Strange,had this on a couple of these and what synthohol suggested rectified the problem.
Did you adjust it correctly?
Also did you do a panic stop to see if it happens on 1st or 2nd transfer?

[menosmola]

Strange,had this on a couple of these and what synthohol suggested rectified the problem.
Did you adjust it correctly?
Also did you do a panic stop to see if it happens on 1st or 2nd transfer?
Yes, i do panic stop, and image in transfer belt is perfect, i think the problem is on second transfer, but i change second transfer roller and check second transfer mechanism and all seems fine, electrical problem maybe?

[Synthohol]

sometimes just to see if it is an electrical issue, try setting it to thick 1,2 or 3 to see if the problem changes. if yes then its likely electrical, if no change it might be something mechanical. check the contact point on the copier where the transfer roller gets its juice and the terminal spring that touches it.

[imihm]

I have a problem with a konica minolta C452.
As you can see in attached examples, the beginning of prints are lighters.
I check belt, transfer roller, and laser, but i cant solve the problem.
Any idea?



Hi there...
This is unexpectable problem check the fusing unit...

thanks

[menosmola]

Hi there...
This is unexpectable problem check the fusing unit...

thanks
problem comes before fuser unit.

[imihm]

problem comes before fuser unit.



Then make sure the connector to the second transfer roller is not loose...

Thanks...

[neil greenhough]

Check the fuser line speed. I have had this problem when engineers have messed with it to stop creasing. Make sure both adjustments are set to default.

Sent from my Nexus 5 using Tapatalk

[menosmola]

Check the fuser line speed. I have had this problem when engineers have messed with it to stop creasing. Make sure both adjustments are set to default.

Sent from my Nexus 5 using Tapatalk
Both set to default...

[menosmola]

Please, can anyone scan and send me "adjustments list" of this machine, i read service manual and all adjustments are set to "0", i want to compare my adjustments list... thanks to all..

[Synthohol]

99% of the adjustments are unique to that machine. 0s are usually thw baseline so trying to match another machines adjustments is asking for a problem.
Just take 1 symptom at a time and perform whatever adjustment is needed.

[menosmola]

99% of the adjustments are unique to that machine. 0s are usually thw baseline so trying to match another machines adjustments is asking for a problem.
Just take 1 symptom at a time and perform whatever adjustment is needed.

Yes, i know, but there are some adjustments that i think are wrong... rewritting the firmware may help?.
I dont sell this machine, the customer call me to solve quality problems and tell me that hebought 1 year ago, second hand i suppose, only 500 copies in the counter... i think nvram was cleared and some adjustments are wrong...