Question about Sharp AL-1642CS Copier

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Metal grid came off

Dropping toner on paper & grime texture on paper
where does grid go are did it break off.

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  • techiam Feb 28, 2008

    have not received drum unit yet

    I ask about main charge grid they did

    not know if it was on the drum unit

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  • 168 Answers

It sounds like the Main Charge Grid. If you are able to take it out of your machine then the grid probably broke off.
Is the grid a thin shiny metal piece about 10" long by about 1/2" wide?
Does it have a bunch of lines/open spaces on it.
If this is what i am describing, then you can purchase another drum unit, and this should take care of your problem with the copy quality and you will not have to worry about the grid.

Just to be on the safe side, where ever you place your order for a new drum unit, ask the company if the Main Charge Corona and grid come with the unit. I am pretty sure that model does have everything all in one unit.
Good luck.
Hope this helps. Please remember to post a feedback and rating if I have helped you in anyway.
Mac =)

Posted on Feb 25, 2008

  • Mac Gyver Mar 04, 2008

    Just checking to see if you have received the new drum unit yet and if that took care of the problem.

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1 Answer

Minolta EP4000 C0200


Hi Usha

The possible causes
-charge corona
-drum in end life

The high voltage wire used to charge the photo-conductive drum is broken or shorted.

It will need to be repaired or replaced.
It is usually a fairly simple job, but you may need the replacement wires to complete the job.
It could be someone has pressed the scoritron grid tensioner and allowed the grid to drop onto the drum.
Great care must be taken when working around the drum area.
If you open the front of the machine.
drop down the transfer section (yellow or green handle)
flip out the toner bottle.
you should see to recessed screws, one behind the toner bottle, one on the far right side of the unit. loosen these all the way,
there may be a plug in each side to disconnect.
you should now be able to slide the unit out.

set it down in some paper, the corona will be the long metal housing stretching front to back on the drum unit.

Remove it by sliding it one way, then it should open like a hinge, open it all the way and it should pop loose of the main unit.
The corona wire is behind the grid, it is the thickness of a human hair. If it is broken you will need a replacement, if the grid was off when you opened the unit up reinstall the grid and reassemble.
If the corona shell or the scoritron is discolored, clean them with a glass cleaner and soft cloth.
Keep the drum covered with paper so it is not exposed to direct light for any great length of time, do not allow the drum to be exposed to direct sunlight.

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Hi There, this depends on what make and model your machine is, in general, faded in the middle means that the charge roller or corona unit is dirty or the paper separation roller/grid, stop your machine while the paper is halfway through, then look at the toner image on the drum, if that is light also, then the problem is with charge roller/grid, if the image on the drum is nice and dark then the problem is with your image separation roller/grid.

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If the line only happens when using the auto document feeder, clean the strip of glass to the right of the main table glass. If it is happening from both the document feeder and the table glass, you need to clean the main charge unit. Open the front door and remove the toner cartridge. There will be one blue screw holding the developing unit the toner cartridge slid out of. Remove the developing unit, and keep it level. Now open the side door and slide the drum unit out from the front of the machine. You will see the black plastic charge unit mounted to the top of the drum unit. Remove 2 screws and remove the charge unit. You will see a metal grid and underneath that a piece of metal with teeth running the length of the charge unit. Use a tooth brush and alcohol to clean the teeth and wipe the metal grid.

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Visually inspect the heating grid attached to the inside of the rear window for breaks in the horizontal lines. Any break in the filaments in the grid will cause a partial failure of the defroster, leaving a portion of the window fogged or obscured.

  • 2 Use a test light or voltmeter to detect breaks in the filaments that aren't visible to the ***** eye. Touch one lead of the light or voltmeter to a grounded metal part of the car and the other lead to a spot on the heating grid. If the light doesn't light or the voltmeter doesn't register a reading, that indicates a break in the filament.
  • 3 Place a piece of tape on each side of the break. Align one piece just above the filament, the other piece just below it, leaving a thin space through which the filament passes.
  • 4 Apply the filament repair liquid with its applicator onto each break you've identified. Be sure to thoroughly cover the broken spot. Allow the repair to fully cure per the instructions on the bottle, then carefully remove the pieces of tape so they don't rip the filament repair.
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  • 6 Reattach the metal power tabs to the heating grid as needed by removing the tab from its connector and repairing it using the epoxy found in the heating tab repair kit. Be sure to allow the full curing time indicated on the kit before reinserting the tab into the connector to ensure that the circuit isn't broken.
  • 7 Check the power switch and wiring to the rear window defogger if there are no breaks in the heating grid and both of the metal power tabs are securely connected to the grid. Replace the switch and/or wiring as necessary.
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    Code appears CO200. What does this mean


    Hi,

    C0200, charge corona failure.
    The high voltage wire used to charge the photo-conductive drum is broken or shorted.

    It will need to be repaired or replaced.
    It is usually a fairly simple job, but you may need the replacement wires to complete the job.
    It could be someone has pressed the scoritron grid tensioner and allowed the grid to drop onto the drum.
    Great care must be taken when working around the drum area.
    If you open the front of the machine.
    drop down the transfer section (yellow or green handle)
    flip out the toner bottle.
    you should see to recessed screws, one behind the toner bottle, one on the far right side of the unit. loosen these all the way,
    there may be a plug in each side to disconnect.
    you should now be able to slide the unit out.

    set it down in some paper, the corona will be the long metal housing stretching front to back on the drum unit.

    Remove it by sliding it one way, then it should open like a hinge, open it all the way and it should pop loose of the main unit.
    The corona wire is behind the grid, it is the thickness of a human hair. If it is broken you will need a replacement, if the grid was off when you opened the unit up reinstall the grid and reassemble.
    If the corona shell or the scoritron is discolored, clean them with a glass cleaner and soft cloth.
    Keep the drum covered with paper so it is not exposed to direct light for any great length of time, do not allow the drum to be exposed to direct sunlight.


    Hope this helps.

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