[Sergi0]

I keep the thread open, that might be usefull for other.

I am going to the varnish solution right now. I read about it and it can’t get worse doing so. I will unsolder the tranformer and immerge it in specific varnish. I will do that in a box where I can pump air to create a pressure for the varnish to get everywhere.

I’ll post more details when I start the procedure !

[Sergi0]

Hi julian,

I did check but it wasn’t that. I was able ro remove the part in picture and test it by directly powering it. the noise come from the transformers. I tried to find the same one but of course, it was not available.

I am trying to find the correct technical reference (220v in and 2x16v out – but I have no clue for the current) to replace it with a more modern one. That should be too complicated because I am working with an old school electronician.

cheers,

S.

[Sergi0]

the location of the sound seems to come from the part in the picture. I touch it using a plastic handle and I felt the vibration. I did not felt it elsewhere.

Is that something that can be repaired ? How ?

Cheers,

S

 

[Sergi0]

I open the TV and did a cleaning of the dust. Not too much as I did not wanted to damage something.

I read a lot about THT discharge and thought it might be the origin of the buzzing sound, but it is not. I did discharge it, clean everything and put back a slight touch of specific grease.

I made a video and the sound seems to come from the bottom where there are a coil or something like that. Here is a video (link only available for 2 days) : https://streamable.com/9yuifk

Did anyone have an idea of the origin of the sound ? And a way to mitigate it ?

Cheers,

S.

[Sergi0]

the buzzing sound is quite annoying. It doesn’t seem to come from the speaker, but from the bottom of the TV. I will remove back cover and try to locate the origin of the sound.

I got the service manual from the site but the scan is not very good and the list of mechanical parts is unreadable. I can do a high res scan if someone send me the manual 🙂

[Sergi0]

[Sergi0]

[Sergi0]

I was able to do it almost alone (the bigbosswifey helps me targeting the holes when I was moving the TV). It was heavy but I did it and it fits perfectly. It was a breeze to secure by pushing the 2 handles simultanously.

The TV is working, at least in got the picture. I am able to play with the menu. I need to plug a console to test it. I notice a buzzing sound that seems to come out of the back of the TV. It stop when I remove the plug. What could it be ?

[Sergi0]

I found my answer and thought it could be usefull for people.

Accessing counters is not possible without specific B&O equipment.

[Sergi0]

Hi,

I get the board from SkynexAV. I had to provide my Avant serial number for the new board to be compatible, but once I received it, I was able to remove the backplate of the TV and change the board.

It is a couple of screws and connector to remove and replace. Being patient and taking pictures may help. Once it was installed, I don’t remember if I had to enter a new PIN code, but as the TV is still working, I might have done it.

Cheers,

Sergio

[Sergi0]

I did change the video engine myself after the reference for the faulty one were provided. I get a new board (might be a refactored one) and it took me around 30mn to install the bew board in the TV. It is not a complicated operation to do, as long as you have the service manual and the right screwdriver 🙂

S.

[Sergi0]

I am always open to learn. the gap is going to be big as I went directly into computer science and the electronics I learn wheren’t practical… But why not !

I took a couple of pictures on the back without the plastic case :

I did not notice an exploded capacitor or something that look deficient (aka burn or something), but my skills are low. Dust, I saw a lot of dust… 😉

Anything to look in particular ? I can also buy a working one and switch parts. This one is in very good cosmetic condition and I was looking for a grey one. The black one is more common to find around Paris.

S.

[Sergi0]

By any luck, do anyone know someone in Paris (France) area able to repair TV CRT ? I search a little bit with Google but no luck so far. CRT technicians are probably all retired… ;).

S.

[Sergi0]

Thanks a lot Martin ! That is helpfull. If I understand correctly, it can explode if I power it again ?

Do you have and idea of the root cause of this problem ? Is the moving of the TV a probable one ?

S.

[Sergi0]

Thanks !

I won’t be alone (not that strong ?) but i was wondering if it needed to be face down/up or on the side.

[Author]

Posts