Download Pass Labs D-1 DAC docs - Car wirings and schematics,automobile documentation, auto repair guides,car audio manuals, car stereo
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|Descr:||Pass Labs D-1 DAC digital to analog converter|
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Service manual for D-1 DAC The D-1 Dac contains 3 separate printed circuit boards in it's chassis. They are the motherboard, receiver board and front panel display and control board. The motherboard has test points for all the on board power supply voltages. These points are located by the heat sinks and labeled on the silk screen. The plus and minus 20 digital are unregulated and are approximate voltages. There are separate 5-volt regulators on the motherboard for VCO and PLL circuits. The receiver board and front panel boards have their own 5-volt regulators. The receiver-input selection is controlled by the front panel microprocessor via Mosfets. These switch one of four relays on the receiver board. The signal is routed to a Crystal 8412 receiver chip. The output of the Crystal chip is feed to the NPC digital filter and also to U7 PLL on the motherboard for the PLL reference. The master clock from|
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