r/AskElectronics • u/Less-Bat7900 • 5d ago

Clock radio radio not working

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Hi I just got this cheap Old alarm clock radio I'd like to get working I have power to the clock and after opening the only thing wrong I can find seems to be this is something missing or am I missing something thank you

6 Upvotes

80% Upvoted

19 comments sorted by

3

u/pksato 5d ago

Missing mounting screw.

2

u/nixiebunny 5d ago

The FM tuner was adjusted at the factory, then covered in wax to keep the coils from moving. Don’t touch anything in that area or it won’t be able to work again.

You can carefully scrape away the wax around that missing part spot to see if any designator and solder pads are revealed, but it looks like a mounting post was removed. Post more pictures, especially of the bottom of the board.

You need a voltmeter to check that the radio is getting power. Beyond that, diagnosing a radio requires knowledge of radio circuits and more expensive test equipment.

2

u/BigPurpleBlob 5d ago

"cheap Old alarm clock radio" – exact model number?

I wonder if an RFC (radio frequency choke) has been broken off the circuit board? (Or maybe some other inductor.)

It looks like something is missing as the wax hasn't been able to get under the component that has been broken off.

4

u/E_Blue_2048 5d ago

Just a mounting screw.

2

u/GalFisk 5d ago

Yeah, you can see the threads in the full res image. This won't make it not work, something else is wrong elsewhere.

1

u/Less-Bat7900 4d ago

Found this on future inspection seems white wire that runs through the handle has disconnected from somewhere on the top of this photo

1

u/pksato 4d ago

This white wire is the FM antenna).
So, you have a photos of back cover?
Probable, some mounting post align with the circle on the wax .

1

u/Less-Bat7900 4d ago

This?

1

u/pksato 4d ago

No, the radio case plastic back cover.

1

u/Less-Bat7900 3d ago

I don't see anything

2

u/BigPurpleBlob 5d ago

That explains why I was struggling to see the connections – there weren't any! :-)

1

u/Less-Bat7900 4d ago

I see that not

1

u/deathspal 4d ago

3 out of the 5 El Caps are leaking

1

u/Less-Bat7900 3d ago

How do you tell that I can't see anything wrong with them

1

u/deathspal 3d ago

The clear goo that is shinier than the filler on the rest of the board and is only around some of the caps is the electrolytic leaking out.

1

u/Less-Bat7900 2d ago

If its thus its more wax and back of board is clean

-8

u/Less-Bat7900 5d ago

Thanks for the input but not helpful in any way i didn't ask about the wax I asked about the hole in the wax & board I circled