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Repair of King luminescent / gas discharge displays, and LED replacements

We have a KR87 ADF where the display has gone blank. Or not quite — no numbers are visible on the display, but there is a glow around a few points at the bottom of the panel. Should I assume this is a display panel problem or could it be the driver circuitry?

ESKC (Uppsala/Sundbro), Sweden

If a part is working, it is probably not a cracked display panel.

I have the KR87MM, if you need it. I believe the driver chips are still available. I would just clean up the connections and change all the chips driving the display.

Administrator
Shoreham EGKA, United Kingdom

Peter wrote:

I have the KR87MM, if you need it.

Got it, thanks. Very useful.

ESKC (Uppsala/Sundbro), Sweden

I read somewhere that the LED replacements mentioned further back are no longer available, due to some legal / certification issue. May be EASA-reg only. Worth a check. I wonder if @simon is still out there?

Administrator
Shoreham EGKA, United Kingdom
64 Posts
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