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This video shows the teardown of a NMU from AlliedSignal Avionics Inc.
00:00 - Intro
01:16 - CPU board
03:08 - IDB 24 board
03:57 - 429 serial board
05:24 - 422 serial board
06:19 - Power Supply
08:25 - Analog Input board
10:34 - NAV/DIS board
12:06 - Fuel Flow board
13:45 - Analog Out Board (maybe Digital to synchro)
15:41 - Magnetics module
17:30 - About resolver, synchro and Scott transformers

This unit uses large number of precision parts:
OP400FY (20)
https://www.analog.com/media/en/techn...
10-bits ADC NEC D7004C
https://www.alldatasheet.com/datashee...

plenty and resistors arrays M989-02-1002B and -1003B
https://www.alldatasheet.com/datashee...

REF-02 voltage reference
https://www.analog.com/media/en/techn...

Multiplying DAC MP7543AD (Micro Power Systems Inc.)
Equivalent to the AD7543 from Analog Devices
https://www.analog.com/media/en/techn...

Probably 2 pairs of Scott transformers, to be confirmed in next episode