Mackie Thump TH-15A - repair

This Mackie Thump TH-15A came to me for repair. It had sound for the first few seconds it was powered on then just hissed. The problem was found to be in the power supply. It would loose the +15V dc. I replaced Q104 which is an S8050 transistor with more powerful equivalent. I also replaced c118 and c120 with 25 volt rated caps as the 16 volt rated ones were slightly under sized. Please use caution as amps contain lethal voltage!

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