Today's Message Index:
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1. 07:23 AM - Re: BendixKing KX-155 repair help (Robert L. Nuckolls, III)
2. 07:28 AM - Re: BendixKing KX-155 repair help (Alec Myers)
3. 04:21 PM - Re: BendixKing KX-155 repair help (Joe Dubner)
Message 1
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| Subject: | Re: BendixKing KX-155 repair help |
At 06:30 PM 1/29/2019, you wrote:
>
>My ancient KX-155 quit suddenly and it's not just the display -- the
>unit went totally dead while in use.
>
>Opening it up I found a blown 10A fuse but replacing it did no
>good. The unit tries to draw enough current to blow a replacement
>fuse (but I'm limiting the input current to prevent that).
>
>The four large electrolytic capacitors look good (not physically
>puffed out) and there's no sign of a smoked component.
>
>IMO it's not worth putting more than $100 into it so taking it to an
>avionics shop is not an attractive option. But perhaps I can repair
>it myself assuming it doesn't need a part made of Unobtanium (like
>the display).
>
>I have a connector wiring diagram but no schematic or service manual.
>
>So my question is where do I go from here? Has anyone on this forum
>poked around in a KX-155 and can offer some suggestions?
I've not had the pleasure of adding the KX155 service
manual to the archives on AeroElectric.com but there
is a manual for the KX165 . . . have no idea how
much similarity might exist between these two
radios but you a welcome to dowload
http://www.aeroelectric.com/Installation_Data/Bendix-King/KX165A_SM.pdf
and compare with what you have in hand.
Bob . . .
Message 2
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| Subject: | Re: BendixKing KX-155 repair help |
eFlightmanuals.com has the manual for the 155 for $104 as a download.
On Jan 30, 2019, at 10:22 AM, Robert L. Nuckolls, III <nuckolls.bob@aeroelectric.com>
wrote:
At 06:30 PM 1/29/2019, you wrote:
>
> My ancient KX-155 quit suddenly and it's not just the display -- the unit went
totally dead while in use.
>
> Opening it up I found a blown 10A fuse but replacing it did no good. The unit
tries to draw enough current to blow a replacement fuse (but I'm limiting the
input current to prevent that).
>
> The four large electrolytic capacitors look good (not physically puffed out)
and there's no sign of a smoked component.
>
> IMO it's not worth putting more than $100 into it so taking it to an avionics
shop is not an attractive option. But perhaps I can repair it myself assuming
it doesn't need a part made of Unobtanium (like the display).
>
> I have a connector wiring diagram but no schematic or service manual.
>
> So my question is where do I go from here? Has anyone on this forum poked around
in a KX-155 and can offer some suggestions?
I've not had the pleasure of adding the KX155 service
manual to the archives on AeroElectric.com but there
is a manual for the KX165 . . . have no idea how
much similarity might exist between these two
radios but you a welcome to dowload
http://www.aeroelectric.com/Installation_Data/Bendix-King/KX165A_SM.pdf
and compare with what you have in hand.
Bob . . .
Message 3
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| Subject: | Re: BendixKing KX-155 repair help |
On Wednesday, January 30, 2019, 7:48:25 AM PST, Robert L. Nuckolls, III
<nuckolls.bob@aeroelectric.com> wrote:
At 06:30 PM 1/29/2019, you wrote:
--> AeroElectric-List messageposted by: "jdubner" <jdubner@yahoo.com>
My ancient KX-155 quit suddenly and it's not just the display -- theunit=C2
- went totally dead while in use.
Opening it up I found a blown 10A fuse but replacing it did nogood.=C2- T
he unit tries to draw enough current to blow a replacementfuse (but I'm lim
iting the input current to prevent that).
The four large electrolytic capacitors look good (not physically puffedout)
and there's no sign of a smoked component.
IMO it's not worth putting more than $100 into it so taking it to anavionic
s shop is not an attractive option.=C2- But perhaps I can repairit myself
assuming it doesn't need a part made of Unobtanium (like thedisplay).
I have a connector wiring diagram but no schematic or servicemanual.
So my question is where do I go from here?=C2- Has anyone on this forumpo
ked around in a KX-155 and can offer somesuggestions?
=C2-I've not had the pleasure of adding the KX155 service
=C2-manual to the archives on AeroElectric.com but there
=C2-is a manual for the KX165 . . . have no idea how
=C2-much similarity might exist between these two
=C2-radios but you a welcome to dowload
http://www.aeroelectric.com/Installation_Data/Bendix-King/KX165A_SM.pdf
=C2-and compare with what you have in hand.
=C2- Bob . . .
Thank you, Bob.=C2- I did download the KX165 maintenance manual and alas,
the innards of the radio are quite different, especially in the physical l
ayout and power supply area.
I've come to learn there are differences in the various KX-155s out there t
oo: KX155, KX155 TSO, KX155A, and differences by serial number.
As an aside, the KX165 is newer than my KX155 but even so, it references DO
S for software updates and a 68HC16 microcontroller.=C2- Takes me back!
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