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Hi all,
I am currently trying to repair a Wharfedale EVP X12P power amp (schematic attached). The amp was blowing fuses with a load. I have changed the o/p transistors, the drivers and the ballast resistors. So far the output looks like the first picture (chopped off sine wave) without a load, and like the second picture with a load (only half of a sine wave). Even without a load and not taking the chopped part into account, the output is not very high (not as high as it should be).
I have checked all the diodes and transistors on the board and all seem fine.
Wharfedale EVP X15P.pdf
Anyone has any idea for what to look at next?
Thanks in adavnce!
I am currently trying to repair a Wharfedale EVP X12P power amp (schematic attached). The amp was blowing fuses with a load. I have changed the o/p transistors, the drivers and the ballast resistors. So far the output looks like the first picture (chopped off sine wave) without a load, and like the second picture with a load (only half of a sine wave). Even without a load and not taking the chopped part into account, the output is not very high (not as high as it should be).
I have checked all the diodes and transistors on the board and all seem fine.
Anyone has any idea for what to look at next?
Thanks in adavnce!
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