Little update here, I replaced all of the ICs with brand new ones, and checked the solders of the sockets on the board and I now have control of the volume, but the crackling and popping is still there.
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JCM900 4100 Problem
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Firstly, the crackling is not present at the fx send, correct?
If this is true maybe one of the plate resistors for V2 or V3?Originally posted by EnzoI have a sign in my shop that says, "Never think up reasons not to check something."
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I have assumed you already tried swapping good preamp tubes in and have confirmed this is not the problem.
The plate resistors are R3 and R4 for V2, R22 and R23 for V3.Originally posted by EnzoI have a sign in my shop that says, "Never think up reasons not to check something."
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