Thomson 26HS4246C

[pyrosster]

Hello all!

I have a THOMSON 26HS4246C that wont power on. No standby LED, nothing.
This TV have a separate 24V power supply that's working correctly.

Inside the TV I found a damaged diode with the reference AB which seems a (SILICON 28V HYPERABRUPT VARACTOR DIODE).

Could I use another replacement for this diode?

Any help is appreciated!

[pyrosster]

Re: Thomson 26HS4246C

bump!

[kasfamily]

Re: Thomson 26HS4246C

in pdf MP1593D this diode B340A

[budm]

Re: Thomson 26HS4246C

Did some one work on this TV before? The connector is broken and then the female is not inserted correctly to line up with pin of the connector.
Does the diode test bad?

[pyrosster]

Re: Thomson 26HS4246C

kasfamily,

Thank you very much! Do you have service manual/schematic for this model?

budm,

Thank you very much! Nobody worked on this TV before. I disconected the board to look the voltage legends below the board and take photos, then I connected the board again without inserting correctly the connector but only to take photos again of the whole tv.

I checked the diode and using resistance check the diode gave me 0.002 and 0.004 in opposite direction. Then I checked the other diode on the same board and gave me 1.09 and 1.19.

This is normal?

[budm]

Re: Thomson 26HS4246C

Best to test the Diode off the board. That diode is part of the switching power supply circuit.

[kasfamily]

Re: Thomson 26HS4246C

only this