| Jun 25, 2013


An IR extender, like the InjectIR, allows you to extend the IR signal from your remote control so that you can keep your audio/visual equipment out of sight without losing the ability to control them remotely. But what do you do if it’s not working? Well there are a few simple things you can do to troubleshoot the problem. While the setup section applies specifically to the InjectIR, the troubleshooting techniques discussed here could apply to other IR Extender systems.

Need to troubleshoot the BlastIR?

Proper Setup

If your InjectIR system isn’t set up properly, it’s not going to work, so let’s take a look at what a proper setup should look like:

InjectIR Connection Diagram

What’s in the box:

change end cap switch to
  • (2) Identical HDMI end caps
  • (1) IR emitter or transmitter (labeled "TX")
  • (1) IR receiver (labeled "RX")

The Sewell InjectIR uses the unused CEC channel of your HDMI cable run to send the IR signal through it (CEC channel is used only for certain HDTVs that can send control commands to your video sources, so if you use CEC, you don't need to extend your remote controls). The unit has a switch on each end cap that allows you to switch between IR injection and CEC channel use. Make sure the switches on both end caps are set to “IR.”

attach cables

After switching the caps to “IR,” put a cap on either end of the HDMI cable that runs between your source (Blu-Ray player, DVD player, set-top box, game console, etc.) and your display (HDTV or monitor). Since both caps are identical, it doesn’t matter which cap goes on which end. Next, plug the transmitter (“TX”), into the side of the end cap on the same end of the source device. Make sure and place the transmitter so that it has a clear line of sight to the IR “eye” on your source. If you’re not sure where the eye is, place the transmitter far enough back to be able to “see” the whole front of your source.

Plug the receiver (“RX”) into the end cap on the same end as your display. Place the receiver so that it can have a clear line of site with your remote control.



Checking the Signal

seeing IR signal with digital camera

Okay, so we’ve made sure your InjectIR is set up correctly but it’s still not working. If that’s the case, we need to see if your system is even repeating the signal from your remote. There is a cool trick to check that, but you will need a digital camera. It doesn’t need to be fancy, even the camera on your cell phone will work (Note: On some of the newer smartphones, like the iPhone 5, you need to use the front facing camera for this trick to work).

You need to set up your InjectIR so that you can operate the remote by the receiver and see the transmitter on the other end at the same time, or just get someone to help you. If you operate the remote while pointing at the receiver and look at the end of the transmitter through the camera, you should see a blinking pale light coming from the transmitter eye. If you want to see what it looks like before you run the test, take a look at the eye on your remote through your camera and hit a button.

If you can’t see the pale light coming from the transmitter, there may be a defect somewhere in the system and you may need to replace either the HDMI cable or the InjectIR. To check if it is the HDMI cable, do the same test with a different HDMI cable. If the signal works, then you know the other HDMI cable is bad. If it is correctly passing the signal, you probably have an incompatibility problem with the device you’re trying to control. You can double check this by setting up the InjectIR to control a different source, or installing it backwards and trying to control your TV. Incompatibility usually comes because of the IR frequencies used by different devices.

Note: The pale light from the IR emitter should be blinking. If you see a solid, continuous light shown through the camera from the emitter there is something defective and you should contact us.

The following video is of the BlastIR but the method of checking the signal also applies to the InjectIR

Single Band vs. Dual Band Frequencies

Every IR signal has a frequency, measured in kilohertz (kHz). There are two general frequency ranges that all devices use. These ranges are called bands. The first band includes frequencies ranging from 33-43 kHz, while the second band ranges from 44-60 kHz. In order for everything to work, your remote, device, and IR extender must all work on the same frequency. If you are using the single band InjectIR (SW-29660), it will only work on the first band. Check your equipment to see if it is compatible. Our dual band InjectIR (SW-30062) will work on both bands, making it compatible with almost all devices. Learn more about single and dual band IR signals.

Note: Both InjectIR models are NOT compatible with the following models of the AT&T U-verse cable box: IPN 4320 and the Motorola VIP series.

All of our products come with free life time technical support as well as a limited warranty. Feel free to contact our friendly, in-house Technical Support staff for more help: