Canon iR4570 Series Service Manual page 319

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7.12.4.5 Removing
Developing Assembly
iR2270 / iR2870 / iR3570 / iR4570 / iR3530
1) Remove the screw [1].
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2) Shift the locking lever [1] to the left to release the
developing assembly.
the
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3) Slide the developing assembly [1] slightly to the
front; then, disconnect the connector [2].
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4) Remove the developing assembly [1].
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Chapter 7
7-43