Beovision 11, No Picture

[sandor.szucs]

Hi,

My Beovision switches on and there is sound but no display. As soon as I opened the back it became evident that the 2 safety capacitors have been burned out on PCB04(power supply BCB).

Surprisingly they are RIFA capacitors notoriously known for their failures. I would like to replace them with a more reliable brand.

Would anybody know the specification for these capacitors?

 

[Madskp]

<hr />

Take a look at this thread where the Rifa capacitors was blown in a Beoplay V1.

https://forum.beoworld.org/forums/topic/beoplay-v1-40-smoked-power-supply/

The bBV11 and the V1 is built on the same platform, so there is a good chance the capacitors are the same.

Location: Denmark

[sandor.szucs]

Hi, Madskp,

Thanks very much for your help.

[sandor.szucs]

Hi,

Anybody who is looking for the same capacitors will find them at the web address bellow:

https://www.aliexpress.com/item/1005010544497927.html?spm=a2g0o.order_list.order_list_main.9.7eeb1802PGeDSR

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[sandor.szucs]

Hi,

So, I got and installed the new capacitors but it made no difference – there still is no display (picture).

Is there a way I could test power supply PCB 04 while it is out of the TV on its own ?

After I replaced the capacitors, I had PCB 04 assembled to the TV and using the service manual diagnostic flow chart (for symptom: No Picture) I did the checks and ended up with the conclusion that PCB 01 should be replaced. However, I am still not sure after those checks if PCB 04 is in fact OK or NOT OK. The service manual does not offer any test methods to determine if a particular PCB circuit functions OK or NOT OK.

Could someone help me with this please?

 

[Mick Russell]

Hi,

I have the same problem with mine. Sound but black screen. I don’t know which board has what designation so I will decribe.

I have tested all voltages on the power board, and all were ok except the one marked P12v T_con. this was mv level.

I then checked T_con board voltages and at the fuse I have mv level not 12v.

After speaking with a TV repair shop they were puzzled why T_con board was not getting 12v and suggested taking the supply connector off and checking voltage levels at the connector in case something was draggng the voltage down. It was still in the mv level.

This now suggests the issue is with the main video board with the processors on.

I don’t know what the issue is yet, or if it can be repaired. I doubt if these boards are available anymore.

But I would be good to see if you have the same voltage levels.

 

[Author]

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