Warning display unit - '87 5KCSQT

[cobram at juno.com]

Right you are.  Got curious enough to take one of the old style autocheck
displays apart.  Wow, there are 12 bulbs in there (11 without Engine
Check Display).  Three focusing plates with 12 lenses in each one.  Each
bulb when lit illuminates a micro-slide which focuses through the optical
array to the front of the autocheck display which is a rear projection
screen.  Cutting edge and expensive stuff in the day.  The piece that
keeps the bulbs from bleeding light is a heavy piece of machined steel.
There is no way to change the bulbs individually either, they look like
Christmas Tree lights (without the base) with the wires soldered directly
to the back of the unit.  If one is burned out it looks like an expensive
proposition to buy the complete assembly with all the connectors and
bulbs.  Leave it to the Germans to come up with a beautiful  (I mean that
in a good way) piece of engineering like this.

BCNU,
http://www.geocities.com/cobramsri/

Brett Dikeman <brett at cloud9.net> writes:

> for backlighting the LCD.  I'm pretty sure the autocheck
> projector-system thing in the earier cars uses a different bulb,
> since they're so packed in together.

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