Hw133v10 Datasheet Here

Periodically check the intake vents. Dust buildup is the primary cause of overheating failures in rectifier modules.

is an IR obstacle sensor Circuits DIY . A "V10" suffix might indicate a "Version 1.0" revision of an HW-133 module (often a touch or water sensor). hw133v10 datasheet

After removing a module, wait at least 5 minutes for internal capacitors to discharge before touching the rear pins. Periodically check the intake vents

: The ribbon cable attached to these modules is extremely sensitive to heat. DIY repairs require a steady hand and often a "T-tip" soldering iron attachment to avoid melting the plastic. hw133v10 datasheet