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Sf7800 sharp copier

I tried changing the toner and it stills displays CH on the screen for copies.

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Clean your dp unit and check yo backboard

Posted on Oct 14, 2008

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5520 sharp ch eror


If CH is still ,your machine's side cove or front cover is not Fully close.
If CH is blink, Toner Cartridge of toner chip is out of your machine, Or toner chip is damaged

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My sharp copier AR-205 will not copy and the letter CH or showing up


Install the developer unit and toner cartridge properly and close the copier side covers well ie the front and the right covers.

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CH steady means cover is open. Close either front or right cover well.
CH blinking means developer unit or toner cartridge not installed. Remove and return well and firmly.

Nov 22, 2009 | Sharp AR-5316 Advanced Digital Imager...

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What does "CH" mean?


On the Sharp copiers when the "ch" is blinking means that the toner cartridge is not in or it may be the wrong cartridge. Some sharp cartridges look alike and will fit into the machine but are the wrong one.

Hope that helps...

Lbcoaster

Feb 18, 2009 | Sharp AL-1642CS Copier

1 Answer

Stopped working


try to see if there is a number appearing after u, maybe its u2-40 which is a toner problem since you run it continously. You can check it by pressing the copy button(green) and the sub code will appear. try to replace the toner cartridge and reset the copier by turning it off and on again, hope it helps

Nov 07, 2008 | Sharp AR-5320 Black and White Copier

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Sf 7800 sharp copier


-Did you try to replace the Toner Cartridge? if not try to replace and installed properly.
or check the Toner Cartridge if installed properly.

Sep 20, 2008 | Sharp AL 1215 Black and White Copier

1 Answer

AR-207 copier has "CH" flashing what to do?


CH code is usually associated with the Crum chip located on the back of the toner cartridge that gets 5 volts dc from the power supply and resets a counter on the main board to tell the copier approximatley how much toner you have when you insert an new toner. What may have happened, is the same 5 volts dc is shared with the laser unit and the when the laser goes bad it may cause the CH code just before it gives the E7-03 code for the laser due to the 5 volts being drawn down by the bad laser. If turning the machine off and back on with the new toner doesn't fix it then you either have a bad chip on the new toner or a bad LSU (laser Scanner unit)

Please don't forget to rate our answers please.

Dec 14, 2007 | Sharp AR-207 Copier

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