I just want to point out something that could really screw up the testing and troubleshooting here, in case anyone is unaware.
The muting circuit in this amp is a real strange one.
For any kind of noise tracking, you should probably use a dummy plug in the input jack (and short tip to sleeve). Otherwise the grid of V1A is grounded via LK12 100n cap.
Even the power amp input will not work by itself without a dummy plug in the gtr input jack. The point above V1A labelled "FXLPOUT" is coming from the Fx return.
The muting circuit in this amp is a real strange one.
For any kind of noise tracking, you should probably use a dummy plug in the input jack (and short tip to sleeve). Otherwise the grid of V1A is grounded via LK12 100n cap.
Even the power amp input will not work by itself without a dummy plug in the gtr input jack. The point above V1A labelled "FXLPOUT" is coming from the Fx return.
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