Galaxy RVR IR Obstacle Avoidance Module

Hello.

I’ve just finished assembling the Galaxy RVR. It works properly in general, but I realized that one of the 2 IR Obstacle Avoidance Modules is not working properly.
Symptoms: when connected, the power led (pled) is on (red), but the led that signals obstacles (sled) never turns on, regardless the distance from obstacles and how the potentiometers are adjusted. Receiver and transmitter are properly straightened. I confirmed it is not a connection issue by switching the position of the two IR modules.

Ostacle avoidance works erratically, depending on the angle with the ostacle. I guess this is another indication that one of the 2 modules is not working properly.

Please advise how I can get another IR Ostacle Avoidance Module.

Please contact service@sunfounder.com and provide your address. We will arrange to send an infrared sensor module to you.