How do you replace royal alpha 9150 ribbon advancement wheel?

To replace the ribbon advancement wheel on a Royal Alpha 9150, first, unplug the machine to ensure safety. Open the ribbon cover and carefully remove the ribbon spool. Locate the ribbon advancement wheel, typically secured by clips or screws, and gently detach it. Install the new wheel by reversing the removal steps, ensuring it's properly aligned, then reassemble the ribbon spool and cover before plugging the machine back in.