TaskAlfa 5500i Image failure after service

[lanierboy]

Good Morning, I have the below problem on a 5500i after a service. the original fault was a charge roller fine line so as the machine was near a service we fitted the complete kit, I have since changed another kit (i case we had a duff one ) but the problem remains even with the original units in, we have followed exactly the procedures and done the machine resets, we have also fitted a new HV board but the problem remains. has anyone seen this before? solution??

error.jpg

[zoraldinho]

Re: TaskAlfa 5500i Image failure after service

Corrupted bias on drum or developer.Check connections between machine and this two units.Transfer roller connection can be bad also.

[Techman1000]

Re: TaskAlfa 5500i Image failure after service

there's a rubber piece right in between mag roller and housing that's hard to notice (see attached pic)

[Jamil Mungur]

Re: TaskAlfa 5500i Image failure after service

Hello
serviced a Taskalfa 5500I and getting exact same problem.

Checked :

1. No rubber found between mag roller and housing
2. Connectors seem ok.

Please help

[blackandwhite]

Re: TaskAlfa 5500i Image failure after service

hai.... Try to do AC caibration from U464,may be it will help you,best of luck...........

[Venom]

Re: TaskAlfa 5500i Image failure after service

This looks like main charge is being lost....possibly dev bias.... but it won't be drum ground or transfer loss

[Tonerkiller]

Re: TaskAlfa 5500i Image failure after service

Make sure that the dev unit is going up and smoothly into place.

[Jamil Mungur]

Re: TaskAlfa 5500i Image failure after service

Hello
thanks for all the replies.

Did AC CALIBRATION : Problem not solved
Venom : how can i confirm if its a main charge loss problem ?
Tonerkiller : yes the developer unit gets into place smoothly.

I am out of resource here friends. Please help

[blackandwhite]

Re: TaskAlfa 5500i Image failure after service

Hello
thanks for all the replies.

Did AC CALIBRATION : Problem not solved
Venom : how can i confirm if its a main charge loss problem ?
Tonerkiller : yes the developer unit gets into place smoothly.

I am out of resource here friends. Please help

good... still same problem.... remove all the drums,dev-units.transfer belt etc....including back and side covers.... blow with air gun....may be some were toner or foriegn particles cause the arcing... remove and reinsert the hvt ,engine main pcb connectors....check for any damaged wires....hope it will solve ur problem....

[Jamil Mungur]

Re: TaskAlfa 5500i Image failure after service

Hello
thanks for reply blackandwhite.

I worked on the machine today.
Removed the developing unit, drum, and transfer belt. Removed power supply and the hvt.

Blowed air on the power supply and hvt and also at the back of the machine. Used vacuum cleaner to clean the drum and developer area in the machine. Cleaned the laser.
Removed the developer drive motor and cleaned the contacts behind the motor.

I must admit that i did not dissasemble the engine and main pcb. But blowed air on thrm and did visual check all seem ok also checked all connector that were accesible.

None of the above solved the problem.

I am starting to suspect the hvt pcb. I wish to be sure the hvt is faulty and was looking gor a way to test to be sure before ordering it. I looked in the service manual but cannot find it.

Any further tests or any clue to solve this problem i will be greatful.

Thanks for support.

[blackandwhite]

Re: TaskAlfa 5500i Image failure after service

Hello
thanks for reply blackandwhite.

I worked on the machine today.
Removed the developing unit, drum, and transfer belt. Removed power supply and the hvt.

Blowed air on the power supply and hvt and also at the back of the machine. Used vacuum cleaner to clean the drum and developer area in the machine. Cleaned the laser.
Removed the developer drive motor and cleaned the contacts behind the motor.

I must admit that i did not dissasemble the engine and main pcb. But blowed air on thrm and did visual check all seem ok also checked all connector that were accesible.

None of the above solved the problem.

I am starting to suspect the hvt pcb. I wish to be sure the hvt is faulty and was looking gor a way to test to be sure before ordering it. I looked in the service manual but cannot find it.

Any further tests or any clue to solve this problem i will be greatful.

Thanks for support.

well...try with your own ideas.....now these machines are not having a proper fault find guidelines... we have todo our own methods...every one is waiting for the result,which you are going to brought ....may be some un noticed chilly issue will be there... keep try....best of luck.....

[Jamil Mungur]

Re: TaskAlfa 5500i Image failure after service

Ok thank you very much. I will keep on trying and keep this thread updated until i find the solution.

[Jamil Mungur]

Re: TaskAlfa 5500i Image failure after service

Got update from olivetti technical support. He told me to wash the transfer roller in the developer unit with soaped water. Quality got better but not completely solved.

[jmaister]

Re: TaskAlfa 5500i Image failure after service

I dont think its the developer, they dont produce streaks.

the base layer is fine, looks like primary transfer is mucked up. Taskalfa Saturns when it was introduced, when the drums are weaken to a point that it starts to leak charge, the drum will "dry rub" the transferbelt. The streaks look like this. But this looks worse.


and 464 is not where you do calibration, its u140. does 5500i have one?

[Jamil Mungur]

Re: TaskAlfa 5500i Image failure after service

Hello jmaister. Thank you for reply
Did U140 previously but did not solve the problem. Do you think the problem is with the drum ? The problem is that i already replaced the drum.

Any support will be highly appreciated.