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Connect contacts 5 & 2 for power supply, and 6 & 1 for output stages to operate the Z 140.
Connect speakers with 2 Ohm/50W resistors, attach voltmeter/oscilloscope, and apply 10kHz signal to test overload protection.
Adjust SVR 601/701 until speaker relays L 602 drop at 13V/10kHz on load resistance.
Measure voltage at measurement points 601-602/603-603 and adjust SVR 602/702 for 15-20mV drop.
Connect DC voltmeter across R 626/R 627 and adjust OV ADJ for max. 20mV DC.
Connect DC voltmeter to CP 16, Pin 4 and adjust R 810 for 33V supply voltage.
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