Does anybody have the KN-53 repair manual handy? I'm looking at replacing the LED display on this older but otherwise fine nav radio. It does not seem like a difficult task to replace the LED display and it certainly is within my capability for use in an experimental. I'm also looking for a source of the LED display and part number.
Van's Air Force
Don't miss anything! Register now for full access to the definitive RV support community.
KN-53 repair
- Thread starter avpro56
- Start date
fmarino1976
Well Known Member
Display
Hi there,
I don't have a manual with me, but I can tell you that the KN53 does not use an LCD display. It is a gas-discharge display that only Bendix/King dealers can get from the manufacturer. Replacing them is not that complicated, although there are some very fragile contacts that support that display.
What is your display doing exactly? If the display is not completely dead, you could try to remove it from its mounting contacts, and clean the contacts with an pencil eraser. Also, the display is made by sandwiching 2 glass plates together. Over time, metal migrates between the contacts under the glass, sometimes cleaning the metal migrations would fix problems like erroneous segments partially turning on. This happens because the display operates at about 190VDC. If you do clean the display, or if you install a new one for that matter, make sure you spread some DOW 4 over the contacts to avoid the metal migration.
Good luck. Let me know if you have any questions, and I'll try to answer them the best I can. Disclaimer: Even though I have done this in an avionics shop, I can take no responsibility for someone else trying it at home! There, hopefully that will satisfy my lawyer.
Hi there,
I don't have a manual with me, but I can tell you that the KN53 does not use an LCD display. It is a gas-discharge display that only Bendix/King dealers can get from the manufacturer. Replacing them is not that complicated, although there are some very fragile contacts that support that display.
What is your display doing exactly? If the display is not completely dead, you could try to remove it from its mounting contacts, and clean the contacts with an pencil eraser. Also, the display is made by sandwiching 2 glass plates together. Over time, metal migrates between the contacts under the glass, sometimes cleaning the metal migrations would fix problems like erroneous segments partially turning on. This happens because the display operates at about 190VDC. If you do clean the display, or if you install a new one for that matter, make sure you spread some DOW 4 over the contacts to avoid the metal migration.
Good luck. Let me know if you have any questions, and I'll try to answer them the best I can. Disclaimer: Even though I have done this in an avionics shop, I can take no responsibility for someone else trying it at home! There, hopefully that will satisfy my lawyer.
Link to KN-53 Install Manual
I realize that the need is long gone, but for the benefit of others that might also be looking for the King Kn-53 Install Manual, here is the link:
https://www.bendixking.com/servlet/...ame=/TechPubs/repository/006-00174-0004_4.pdf
Bill Swatling
I realize that the need is long gone, but for the benefit of others that might also be looking for the King Kn-53 Install Manual, here is the link:
https://www.bendixking.com/servlet/...ame=/TechPubs/repository/006-00174-0004_4.pdf
Bill Swatling
przemekmac
I'm New Here
Hi, I'm looking for pinout/installation manual for this radio. Can anybody share it for me?
Thanks!
Thanks!
