Electronics > Repair

What more i can do?

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222Lab_Test222:

--- Quote from: Harry_22 on November 19, 2024, 06:33:21 am ---
So try to unsolder RTC chip.
Thus we disconnect Pin 11 which generates pulses with 64 Hz frequency.
There are a lot of D4990A on Ali.
Just raise 11 pin as I wrote but literally by half a millimeter.


--- End quote ---
The thing is i do not understand what will happen if i desolder, will it only not send signals to TP?

222Lab_Test222:

--- Quote from: Sorama on November 19, 2024, 06:52:52 am ---Maybe you can follow the beeper signal to know what it triggers and thus understand the conditions and analyze those conditions ?

--- End quote ---

Can you give some hints and explanations?

222Lab_Test222:

--- Quote from: Harry_22 on November 19, 2024, 06:33:21 am ---Just raise 11 pin as I wrote but literally by half a millimeter.


--- End quote ---
Here it is,
The Pin is raised
The second image is the signal of TP1 non working board after RTC TP raised...

Sorama:

--- Quote from: 222Lab_Test222 on November 19, 2024, 07:07:07 am ---
--- Quote from: Sorama on November 19, 2024, 06:52:52 am ---Maybe you can follow the beeper signal to know what it triggers and thus understand the conditions and analyze those conditions ?

--- End quote ---

Can you give some hints and explanations?

--- End quote ---

If you know (electrically) what drives the beeper and in the end which transistor/ processor pin, it may help you understand the prerequisites/conditions for the beeper and thus why it is beeper. Just follow the signal of the beeper.

fzabkar:

--- Quote from: Harry_22 on November 19, 2024, 06:33:21 am ---Thus we disconnect Pin 11 which generates pulses with 64 Hz frequency.
There are a lot of D4990A on Ali.
Just raise 11 pin as I wrote but literally by half a millimeter.
--- End quote ---

Pin 11 of the RTC is open drain, so it can be safely shorted to ground. Will this do what you want?

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