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Audio Monitoring Boards<br />
Accessible from the rear of the console, the Monitor Boards handle the<br />
Cue mixes, Inserts, Outputs and have various trims and system<br />
connectors in place.<br />
The majority of the signals that appear on the connectors on these boards<br />
do not appear on the 25-way D-type connectors.<br />
Regardless of the console size, all of the following four Monitor boards and<br />
four rev returns will always be present in the same configuration.<br />
Viewed from the rear, from Left to Right, these boards are:<br />
Monitor Board 4 (Cue mix)<br />
Two jack sockets each handle the Left and Right of each Cue Mix.<br />
There is also a jack socket for the Return Talkback mic, the adjacent trim<br />
pot providing 0dB to +40dB of trim.<br />
Monitor Board 3 (M1 L/S )<br />
The 15-way D-type female socket fitted to Monitor Board on the extreme<br />
right hand rear of the console provides access to the DC Remote Control<br />
functions of the console as well as the producers microphone level input.<br />
The Red Light connections on pins 1 & 2 of the connector provide a relay<br />
contact closure when the Red Light switch is operated.<br />
The relay contacts have a maximum switching current rating of 2 amps<br />
and should be used to drive an external relay of suitable contact rating.<br />
Pin 14 provides a current limited (~100mA) 4.7v source.<br />
Pin 15 (digital ground) is for use with external switch contact closures to<br />
provide the following remote DC functions:<br />
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