Another great way to test for remote control without presence of the appliance

A friend of mine and an electronics repairer from Fiji islands sends me this report on how to test a remote control.

While I was playing with one remote control of my DVD player, I was thinking the sensor is just a LED, but why it cannot light when we press the buttons.

I brought it close to my eyes and was trying to view the lightening of that LED.

Hopefully in some remotes we can see a little blink if LED, but as far as I have seen in remotes which are produced nowadays are hard to view the light of the LED with our naked eyes.

Interpretation:

May be the signal light is so tiny that we cannot see it with our naked eyes.

I thought to use my mobile phone camera to magnify the signal light and see if it is visible.

I was so happy, actually to see the LED lightening while watching it though the camera.

Here are the pictures I took:

It can be perorated that ,if a remote is not working it will not have its LED lightened when you press the buttons.TRY THIS OUT WITH A GOOD REMOTE AT HOME

So all my repairer friends there is a very good tester for remotes, which is always in your pockets (Our mobile phones with cameras).

After reading this article I decided to do the same test using my tablet and the result were the same (positive) as you can see the pictures below

This article is prepared by Atish Chand, a repairer from Fiji Islands

CRT tv remote control repaired

One of my CRT tv repair course customer Mr. Michel Ndala,From DRC congo send in this repair report.

Hello Mr. Humphrey, today I applied the rule of your e-book page 95

and 96, to repair a remote control of CRT TV that did not work.

I am very happy to let you know that it worked very well and I tell you sincerely that great.

Imagine that remote control belonged to a policeman and he watched me work, and when I took the radio to try to the frequency of 530 KHz AM He understood nothing.

But when trying to the TV and it work perfectly he was very happy. Do you know, it was only a bad connection to the crystal leg.

Thank you very Much.

Below you can see the inside of a remote control. Most of the problems with remote control are mechanical.

 

Usually the crystal oscillator used in TV remote control oscillate at around 530 Khz.

Therefore if you tune your radio to AM band and tune around 530 KHz then you should get some pulses if the remote is working.

 Thank you guys