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8.5 Main Equipment Description
The MAIN EQUIPMENT consists of the Common Control boards, Main CPU, EIS control cards,
Amplifiers, Power Supply and Termination boards.
8.5.1 Common Board Frame
The common board frame is the top frame in the ECP and houses the following boards/modules.
➢ Main Tone Generator Board (BRDEV3TG)
➢ Standby Tone Generator Board (BRDEV3TG if installed)
➢ Main Microphone/BGM Mixer Board (302 484)
➢ Standby Microphone/BGM Mixer Board (302 484 if installed. 2 x 251-0014 guide rails
required)
➢ FACP Input CPU Board (302 620 if installed)
Figure 7: Common Board Frame
MAN1813-9
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