DV Mark 50w micro head brought in for issues relat…

DV Mark 50w micro head brought in for issues relating to the potentiometers. Not an easy amp to work with as pretty much everything is surface mount micro electronics, even the pots are tiny sealed units.
The owner requested a modification to add in insert point pre power section as a preamp bypass for connection of a modeling pedal, Helix I believe. The next generation version of this amp provides an effects loop send/return as opposed to the balanced line out of this version.
The front panel of this however has a line in 3.5mm jack which is shown by the manufacturers block schematic as a feed directly to the heads power section post preamp/tone controls so theoretically should serve the requested requirement.

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