DC offset with Electrocompaniet AWII

Hello

Dc offset can't be nulled on one side of an Electrocompaniet AWII. If I load the input with a 100K resistor, I can do it. I thought replacing R5 with 200 ohms to have more range with the pot. Here is the front end schematic. There was a service bulletin with upgrades that have been done. C1 and R4 are now replaced with a jumper. C2 is replaced with 1K resistor. Thanks
 

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  • AW2 front.jpg
    AW2 front.jpg
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