Amplifier Bias Set-Up - Cambridge Audio 640A Service Manual

Cambridge Audio Azur 640A Amplifier Bias Setup
To set the bias on the 640A Amplifier:
Measure the voltage across R22 and R100 (Left channel) individually; they
should be adjusted using Preset R116 so that the voltage measured on each
resistor is greater than 13mV. This procedure should then be repeated for the
Right channel by measuring the voltage across R52 and R69 whilst adjusting
Preset R68 so that the voltage measured on each resistor is greater than 13mV.
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