hi,
recently i was given 2 Sherwood RD-6405R's to fix, and my friend only wants 1 back, as the DAC and transformer and variouse other parts from the 2nd amp will be good for other projects...
1ch in one of them was blown (shorted output transistors) and 3 in the other were blown (also shorted, so i decided to just remove a "good" pair of transistors from the "more blown" amplifer and replace that single channel...
well... the amp now turns on and stays on without protecting... and plays music quite well thru 4 channels... the 5th still doesnt work. all i get is the odd little crackle and if i turn it up 2 any reasonable volume the amp protects.
IF i dont plug a speaker into that channel the amp works quite happily and does not protect...
i have tried 2 different sets of transistors (the same pairs of course lol) and it just keeps doing the same thing.
if it is any help the transistors are "D2390/B1560" and i measured a DCV of 56-0-56
Any help would be really appreciated 🙂
Haydn
recently i was given 2 Sherwood RD-6405R's to fix, and my friend only wants 1 back, as the DAC and transformer and variouse other parts from the 2nd amp will be good for other projects...
1ch in one of them was blown (shorted output transistors) and 3 in the other were blown (also shorted, so i decided to just remove a "good" pair of transistors from the "more blown" amplifer and replace that single channel...
well... the amp now turns on and stays on without protecting... and plays music quite well thru 4 channels... the 5th still doesnt work. all i get is the odd little crackle and if i turn it up 2 any reasonable volume the amp protects.
IF i dont plug a speaker into that channel the amp works quite happily and does not protect...
i have tried 2 different sets of transistors (the same pairs of course lol) and it just keeps doing the same thing.
if it is any help the transistors are "D2390/B1560" and i measured a DCV of 56-0-56
Any help would be really appreciated 🙂
Haydn
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