This panel was used on McDonnell Douglas DC-9. It was placed on the Upper left-hand side of the Forward Control Pedestal. If you wish to see it click here. Then click on the picture and it is item 1 in the photo.
Lucky the analysis will be very quick, as the schematic is on the units bottom plate. So the Analysis: Panel inner and outer control are both 10 position rotary switches. The Red Control is an 8 position rotary switch coupled to a transformer. The Third Control is marked White, and are connected with a double gang wire wound potentiometers.
Plan: Most of my lights are: 28v, 12v, and 5vdc for LEDs. So I have included the following table to help. The connector is a Burndy DC22E20-41P. Its mate should be a Burndy DC26F20-41S. I have included a partial pinout diagram below#Connector. Please see the Component Description Page here.
| PIN | number | Description | What goes where |
|---|---|---|---|
| b | 28 | Panel Lamp - Ground Bound | |
| D | 27 | Panel Light V- | |
| C | 26 | Panel Light V+ | |
| G | 25 | VCC R1 | +12vdc Bus |
| H | 24 | VCC R2 | +28vdc Bus |
| J | 23 | Wiper R2 | 28vdc Lighting Bus |
| c | 22 | Wiper R1 | 12vdc Lighting Bus |
I will run 28vdc (H) from the 28vdc buss through R2 and out the wiper via (J) and to the 28vdc lighting Bus. I will do the same for the 12vdc buss as well.
I will have to open up the controller and remove the knobs and panel to see what the requirement is.
(a few hours later)Well, I opened it up (you can see the pretty pictures), and found the light panel. And it is a 5vdc led panel made by Spectrlux part number 9915674-505. A quick call to them should let me know if I need to limit the current or not.
(next day) Wow, after playing telephone tag yesterday, I am no better off. When you call them you get a machine and NOBODY ever picks up. (I need a plan here). Late in the day I got a call from Spectralux and assured me that the panel has small light bulbs. Onwards and Upwards!
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| image 1 The Guts | image 2 Back of the Light Panel | image 3 Rear Connector |
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| image 4 DC-9 Cockpit Panel is outlined in Red. | image 5 | |