I am working on an ir1510 for a customer it is light on one edge the one to the back of the mechine. Only about half a shade on gray scale. The drum unit sets in fine it has 27k on it did order a drum haven't went back yet. And have cleaned optics and charge roller. Is there a way to adjust the shading in the service mode.
ir1510 light on edge
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Try checking the cartridge guides inside the machine...especially the rear one. Have seen many broken. It's black plastic and you need to look closely, since there's a small amount of play to it anyway. Canon has since updated the part to a more beefy one. Aside from that, you're probably looking at a new drum anyways, since Canon estimates it a 24K+ lifespan.
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