Le labo de Michel | LDM #233: CD605 BFGoodrich - Single beam colour Control Display Unit - Part 1 @lelabodemichel5162 | Uploaded 2 years ago | Updated 1 hour ago
This video shows the teardown, reverse engineering and first power-up of a BF Goodrich CD605 Control display Unit used in the TCAS791.
This indicator has a 3 colours CRT with a single beam. I suppose that the functioning is closed to the Chromatron system. Please leave a comment if you know more about this CRT. The colour is selected using 4 wires which are connected to the front of the CRT. The 4 signals are generated using a PROM with 8 addresses which are connected to a 8-bits counter. The clock of the counter is generated by a PLL which multiplies par 256 the frequency of a clock signal which must be fed to this instrument.

00:00 - Intro
01:00 - Teardown
01:47 - Power Supply board
03:00 - In search for the power supply input
05:00 - First power up
08:50 - Interface board
One week later
09:20 - Single beam CRT, assumption functioning
10:30 - Deflexion/video/colour board schematic diagram
13:15 - Video comparator / luminosity control
14:30 - Horizontal deflection and synchronization circuits
16:10 - Vertical deflection and synchronization circuits
17:29 - Pinout of the rear connector