The SL1117-3.3D is functionally the same as the LX811733, but it is in a T0-252 case and likely will not fit on your circuit board. The regulator must be soldered to the PC board for cooling. You need a device with a D-PAK case.
If you remove the LX811733 you can test it on the bench with a 5vdc power supply. There are youtube video’s showing how to do this.
I don’t know what the FDFS2P102 does in this circuit. It may stop-start the drive motor or regulate the drive motor voltage. It is a Schottky diode (Pins 1&8) and a MOSFET (Pins 3,4&6) in a single device. These can be tested with a DMM. You will have to search for the pdf of the FDFS2P102 as the forum doesn’t allow pdf attachments.
Google:
How do i test a Schottky diode with multimeter
How do I test a MOSFET with a multimeter
BadcapsDOTnet is a good resource for troubleshooting defective electronics.