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Wireless doorbell chime - no sound

Cirkit

Oct 28, 2015
146
Joined
Oct 28, 2015
Messages
146
I am trying to troubleshoot a wireless doorbell chime. It started to fail with a short chime and then no chime, just a flashing LED.

The two ICs I cannot identify are:

F0R1958
FLC-3A-58

Both are SOIC-8 packages.
 

Martaine2005

May 12, 2015
4,341
Joined
May 12, 2015
Messages
4,341
If the receiver (chime) is mains powered, check the power supply.
My ex wife had this very issue last year. It was (one) capacitor. It’s still happily chiming away now.


Martin
 

73's de Edd

Aug 21, 2015
3,432
Joined
Aug 21, 2015
Messages
3,432
Sir Cirkitt . . . . . . .(Haven't I ogled your old IBM computer mainframe mini modular boards AVATAR logo once before ? )



All meaningless numbers ?
How abouts some good photos of both board sides . . . so that an eventual mark up analysis and evaluation can then be derived . . . . .
viz . . .

upload_2022-7-17_4-6-16.png










Then . . . . . you also might run into something akin to your units internals here . . .

https://www.google.com/search?q=wireless doorbell teardown&tbm=isch&tbs=rimg:CVooDc6dlhHBYSvykMhax1uF8AEAsgIOCgIIABAAKAE6BAgBEAE&hl=en&sa=X&ved=0CBwQuIIBahcKEwjgx72ztf74AhUAAAAAHQAAAAAQDA&biw=1903&bih=941


If the LED light up is in response to a button push , at least the RF aspect is working, which would then reflect to an audio amp or melody generator failure aspect.

73's de Edd . . . . .



I failed math so many times at school . . . . . I can’t even count.



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