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Arcam P-1000 Amplifier Board functions and operation
The power amplifiers in the P-1000 are of class H design and use a three rail power
supply for high operating efficiency. These amplifier boards are field replaceable and
the unit can be safely operated with one or more boards out of the unit. The operating
descriptions below are divided into three groups. The input and signal control section.
The amplifier section and the power switching section. Signal net name references as
they appear in the schematic are designated here in bold type.
The line level audio path of the P-1000 very simple and short. Unbalanced audio
sources are buffered by U6-A and summed with the balanced input from U1-A. The
signal then passes through the gain set stage of U6-B and then on to the AMP-IN|