Introduction
Replacing the driver motor of your printer.
Tools
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            To remove the top cover of the printer, you have to first release it from several tabs. 
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            These three are the easiest tabs to remove. They are located on the back side of the printer. 
 
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            Push the tab in with one of the plastic opening tools. 
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            Keep the tab pushed in by leveraging the tool between the tab and the hole. Pull up on the case so that the tab doesn't lock back into place. 
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            Repeat this process with the furthermost right tab, then proceed with the middle tab. 
 
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            Insert the pointed end of a spudger into the hole on the bottom left corner of the printer and pry out the tab. 
 
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            Insert the pointed end of a spudger into the hole on the bottom right corner of the printer and pry out the tab. 
 
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            The final two tabs can be more difficult to release. Viewing from the front, they are located in the back left and right corners of the printer. 
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            The release points for the tabs are located in holes on the depressed area of the base (darker piece). 
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            Use the pointed end of a spudger to pry out the tab. 
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            Use one of the plastic tools to keep the tab pried out. Once it releases, push in towards the printer (viewing from the side) and pull up on the case. 
 
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            All of the tabs have now been released. 
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            When trying to completely remove the cover, it gets caught on these two back components. Maneuvering around these can be tricky. 
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            Push the cover to the right slightly and then push it backwards (out of the screen in this picture). This should give it some wiggle room. Repeat this as necessary. 
 
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            Remove the four screws that hold the motor down. 
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            Use a small pair of needle-nose pliers to hold the back nut steady. 
 
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            Push on the spring loaded tensioner on the left side of the belt to loosen the force on the drive motor. 
 
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To reassemble your device, follow these instructions in reverse order.