Truth table
Sel0 Sel1 Sel2 Sel3 Sel4 Vol /RST Vol /Mute DAC /RST
0 0 0 0 0 1 1 1 DAC output
1 0 x x x 1 1 1 L/R analogue direct
0 1 1 1 0 1 1 1 MCH output
x x x 0 1 1 1 1 Sb=Zone 2
x x x 1 1 1 1 1 Sb=L/R
x x x x x 0 x x Volume control reset
x x x x x 1 0 x Volume control mute
x x x x x x x 0 DAC reset
The output of the volume control is buffered through IC202, IC206, IC208,
IC210 to remove any DC offset before going to CON100 (connection to the
power amp) and SKT100 & SKT100 phono outputs sockets. Shunt relay
muting is provided for power on/off, controlled from the PW338 (Main mute &
Sblr/Sbr mute).
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