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CIVA INS CDU Teardown

Now – ridiculously late, I know – a couple of pictures I took back when tearing apart my Delco Carousel IV-A (CIVA) CDU. Sorry for the rather mediocre image quality, some day I should get a macro lens…

There goes the last hope for air-worthiness
There goes the last hope for air-worthiness

The case with the lid remove, showing (from front to back) the power supply, logic boards, decoder drivers and a glimpse of the mess of wires that is the front panel
The case with the lid remove, showing (from front to back) the power supply, logic boards, decoder drivers and a glimpse of the mess of wires that is the front panel
.

Logic board #2
Logic board #2

Right decoder driver board. That’s how you can save a layer in your PCB with some manual soldering.
Right decoder driver board. That’s how you can save a layer in your PCB with some manual soldering.

Some power related circuitry.
Some power related circuitry.

Switches and lights wiring of the front panel. A heap of fun rewiring all of that.
Switches and lights wiring of the front panel. A heap of fun rewiring all of that.

The back plane with logic and decoder boards removed.
The back plane with logic and decoder boards removed.

The back side of the front panel. Notice the huge switches and rotary encoders, the switches feature embedded light bulbs for illumination.
The back side of the front panel. Notice the huge switches and rotary encoders, the switches feature embedded light bulbs for illumination.

A more dramatic shot of the switches and rotary encoders.
A more dramatic shot of the switches and rotary encoders.

The seven segment “displays” without their covers
The seven segment “displays” without their covers

Yes, you have seen right, they are actually ~1.5mm light bulbs (70s design, no LEDs).
Yes, you have seen right, they are actually ~1.5mm light bulbs (70s design, no LEDs).