Ricoh MP 7503SP Field Service Manual page 560

4. Replacement and Adjustment
4. The laser synchronization detector [A] is inside the right front corner of the machine.
• You do not need to remove the development unit fans next to the laser synchronization
detector.
5. Loosen the single screw of the laser synchronization detector [A] (do not remove it!).
6. Pull the detector out partially and disconnect it [B].
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