TS5823 5.8GHz 200mW – Video Noise problems

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Here you will find an easy fix for those TS5823 200mw 32ch video transmitters with some noise in the image due to the transmitter power supply noise. Check the picture to see the problem (click on them for full size):

Noisy video
Noisy video
Video after fix
Video after fix

I had some video noise so I installed a power filter in the 12v line for the video transmitter, but the noise was still present in the video. After I tried a 600mW video transmitter and the problem was solve, so the noise was in the 200mw transmitters. I had two TS5823 transmitters so I could plaz with one and see the difference between them.

The fix

To solve the problem you will have to break the power supply line to the 5.8Ghz transmitter and bypass it with an inductor, in my case I had a 220uH SMD power inductor, but I think you can play a bit with the inductor value to fix the problem.

The first think it is to remove the power line to the transmitter, to do that I used a knife blade to separate the small board. I started with the first pin, applying heat and introducing the blade slowly until the first three pads were released from the board (note that the top cover it is removed, you don’t need to remove it to do that). The power line it is located in the second pad from the top, where the knife is placed.

Disconnecting the power line to the transmitter
Disconnecting the power line to the transmitter

The using a multimeter check that the line is removed from the power. Then the inductor will be placed between the middle of the power capacitors in the other side and the pad number two. I will recomed you to use wire wrapping wire to connect one side of the inductor to the power pad. Check the following image.

Installing the power inductor
Installing the power inductor

In the odder side you will have to solder the other side of the inductor to the second pad of the transmitter. In one of the transmitters I broke the pad so I had to connect the power directly to the transmitter board, that’s why I had to remove the top cover.

Inductor Fix
Inductor Fix

If this happens to you, you can connect the power line after the inductor to the following location.

Power line location
Power line location

After this quick fix, you will see the improvement of the video quality.

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