I don't know definitively for the amps of this type that have the extra drivers between the driver board and the outputs. For the other versions, yes but it will be at the frequency that you drive into the RCAs.
I’m seeing where there are attempts on replacing parts by other tech has been done, can anyone verify the part numbers for the buffer transistors for the final drive stage before the output mosfets and the value of the feedback resistor (R204) on the positive speaker terminal? There are a mixed of A42s and A56s but also some 2N5551 don’t know how f those should be there.
Attachments
With your help Sir Babin I resolved the drive transistors for the final (buffer stage) along with the corresponding smd resistors, I’m not having the overheating issues now but my findings is that it’s flicking between power and protect, and when inspect the main drive circuit there’s a mixed of 2N5401’s with the original parts A92’s, A96’s and A42’s that I would normally see on some designs.
Do you know the original part number for Q122 and Q123 or a layout of the driver circuit (embedded onboard) so I could rebuild the drive stage?
This amp shows sign of previous repair attempts it was brought to me disassembled.
Do you know the original part number for Q122 and Q123 or a layout of the driver circuit (embedded onboard) so I could rebuild the drive stage?
This amp shows sign of previous repair attempts it was brought to me disassembled.
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On page 6 of the following manual, what transistors correspond to the transistors in question in your amp?
http://www.bcae1.com/temp/classDtype2wdriverboardindexa998.pdf
http://www.bcae1.com/temp/classDtype2wdriverboardindexa998.pdf