Wiwa HD50 Tuner Remote Control Unresponsive: IR Sensor LED Green, Transistor Replaced

Welcome.
Some time ago I turned on the tv tuner ... It started without a problem and it only plays on 1 program because I can't switch to another one, or turn off the tuner in any way ... in other words, the remote control does not react. The green LED on the IR sensor is green, but nothing else. I dismantled the sensor and replaced the transistor in the sensor blind, but it did not work. I looked in the smartphone camera if the remote control diode is blinking and kind of oki. Maybe thin, but it blinks when pressing the remote control buttons, so the cbyba remote control is ok.

Someone will help, because I don't know what to do next?
Oh, I checked the sensor cables with a break meter: - \

You missed. The wiw sensor is like this: Link The blinking diode in the remote control does not indicate its efficiency. It may send incorrect signals.

andpol 33 wrote:

The blinking diode in the remote control does not indicate its efficiency. It may send incorrect signals.

That's right ... I just don't know how to check it ??

Nobody will help?

You must have a second remote control or a second sensor for the base.

Tuś gave me the novelty

What do you expect? That someone will fix you remotely? Take the decoder apart, take the oscilloscope and see what is reaching the CPU.

By no means ... Always asking this type of question, I hope that someone has already encountered such a problem, solved it and now will be able to share this knowledge.
Or maybe a hint in the style of check the transistor in the ir detector

Apparently you replaced the transistor. I have encountered such a case once. The diode was on and he did not respond to the remote control. It turned out to be a damaged detector. The decoder was under warranty, so it went to the store.

Hello.
If you have a voltmeter, check the appearance of a signal - voltage when transmitting a signal from the remote control after opening the tuner. First on the jack socket and then whether the signal goes to the processor.
Kaśka.

andpol 33 wrote:

Apparently you replaced the transistor.

Yes it's true. The tuner is not under warranty, so I have to deal with it myself.

In the detector, after the ir diode, transistor, led diode and a few resistors, I did not find anything else ... so the transistor was replaced, only the ir diode was left for me.

Now the question is what?

mihal2002 wrote:

szumigt wrote:

so the transistor was replaced, only the ir diode was left for me.

Leave it alone and crank the decoder. There, in the nest, look for the cause.

And this is concrete. Thanks

You mean it because I don't know anything special here

Read:
https://www.elektroda.pl/rtvforum/topic2984723.html


Kaśka.

kacha36 wrote:

Read:
https://www.elektroda.pl/rtvforum/topic2984723.html
.

I have read and checked. Diode power supply and + 5v ok. How to check IR I have no idea ...