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Transcript
Connect indication PCB, level regulators, input and output connectors according to the assembly diagram. On the chassis install the transformer (transformers) with the isolating gaskets. Connect a main 220VAC according to the assembly diagram. Isolate solder places with help of shrinkable tube. Do not connect secondary windings. After completion of assembly works make sure of lack of mistakes. Example of assembling: 4. ADJUSTMENT OF THE AMPLIFIER. Before power up: Connect the transformer to the adjusted channel. Set R8 resistor in mid position. Connect the voltmeter between XN4 (Dir Out) and XN5 (GND).Power up the amplifier. Voltage has to be close to zero. Voltage (with some deviations) on R25 must be 280 mV (50W ver) / 200mV (100W ver.). If it is not - immediately power off and look for mistakes. Adjustments of the R8 resistor should achieve an output voltage in limits +/-10mV. Final adjustment is then made on the completely heated-up amplifier. Thermal changes of the voltage are a normal occurrence.
