Thanks, I spent the morning going through the voltages and it turned out Q15 is busted. need to replace that and check again.I guess pad 22 on the pcb is pad 22 on the schematic.
First of all check the dc voltages with no signal applied, on Gyraf website there is a schematic marked with reference voltages.
Once you confirmed the dc measurements are ok, input a sine wave and take measurements in the audio path from input to output with a scope or ac voltmeter. Should become obvious where the level mismatch is happening