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Kenwood KA-7100, anyone have data on adjusting Bias and Offset?

Phototone

Phototone

Super Member
I just need the location of the adjustment potentiometers and the bias test points. I know the DC offset is measured at the speaker terminals, but I need to know where the pots are for that also.
 
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Surely "someone" has the ONE PAGE of the service manual that shows the location of the adjustment pots and the test points? AK does not have in in the archive nor do the other online free services.
 
Possibly, but you might have to wait more than a couple of hours for "Shirley" to show up with her copy.
 
Offset trim pots are VRe1 and VRe2, should be located close to the dual Nchannel FET (uPA63H)

This Kenwood amp is biased to 40mA. Bias trim pots are VRe3 and VRe4. Adjust for 40mV between the emitters of the power transistors, or 20mV across each 0.47Ohm emitter resistor. Do this adjustment with NO load, volume control to minimum.
 
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