LDM
This video shows the teardown and test of a Boeing 757 cockpit standby engine instrument, model S231n001 manufactured by General Electric. The schematics with explanations are given at the end of this video.
00:00 - Intro
01:17 - Teardown
02:29 - EGT board
04:05 - Cold junction compensation
05:37 - EPR board
06:47 - N2 board
08:27 - N1 board
08:45 - Tests
11:34 - Self-test
12:00 - Reverse engineering: PS board
12:39 - Reverse engineering: EGT board
16:49 - Reverse engineering: N2 board