TSE : inverting red and yellow cable

[gmonno]

Had a good working TSE, minor issues that Boywonder & Evenharmonics helped to solve.

Going to set the final configuration, it happened to INVERT red and yellow wires (I should have learned not to do these things and play with my daughter).

Result : 450V were 5V was supposed and obviously 5V were 450V, a very BRIGHT light from the 5AR4 and .... silence.

After correcting the error tried to put another 5AR4, the strange thing is that B+ arrives to 150V more or less and then begin to go down.

What may be?
Would it be possible that the choke (R4) is gone?
Or the FRED (D2, D3)?

I really have no idea.


Thanks for all help or suggestion.

 

[gmonno]

Just discovered that R5 was gone.
This means that to be sure would be better substitute R6, R7, C6 and C7 too?

 

[Evenharmonics]

Measure those with multimeter and see if resistors hold their value. If not, replace. As for the capacitors, someone else may know how to check accurately.

 

[gmonno]

WORKS!!!
It was only R5, just change it, all checks again and ... voilá ... music.

Thanks all