Q2 OPERATION AND MAINTENANCE MANUAL 9601 66
This board contains the master sections for the auxiliary outputs of
the console in addition to headphone amplifiers and a talkback
microphone amplifier for the headset microphone.
The 4 auxiliaries are identical and therefore it is only necessary to
describe one. The signal from the bus is mixed by IC1 and is then
passed through the fader followed by the ON switch to an
SSM2142 balanced line driver which connects to the rear panel on
the console. A feed for the meters and the solo system is taken
immediately after the ON switch. There are headphone amplifiers
for the front panel headphone sockets and another amplifier to feed
the headset. A separate talkback amplifier exists for the headset
microphone and this is fed to the COMMS board.
THE AUXILIARY MASTER MODULE