Dave:
Just did that mod two days ago.
Here's what I did.... if I can recall clearly.
1) download and view the set of K3 schematics... specifically the one
labeled "KIO3 AUDIO I/O BOARD", page #12 of 43 in the K3 schematic
file set.
2) You'll be looking for the lines coming from J8 (Spkr), and specifically
lines labeled SKP_L, SKP_R. Following these lines all the way to the
left of the schematic, you'll find that they connect to pins 1 and 4
of the 16-pin header connector.
3) You'll also want to identify a grounded pin on the header connector.
I chose pin #10 (MIC C)ommon, since it was directly 'wired' via a
hard-wired line back to the ground foil.
4) Now, take your first resistor, lay it against the PC board and bend
(and trim) its leads such that they will lay against pins 4 and 10
of the 16-pin header connector. Solder into place.
5) Lay the 2nd resistor up against the first and bend/trim its leads to
connect to pins 1 and 10. Solder.
Done
73,
Tom Hammond N0SS
At 18:18 12/24/2008, you wrote:
Happy Christmas, all.
What better time than the final hours of Christmas Eve to apply the
mod, recently described by Wayne, that prevents damage to the audio
output chip if a mono jack is inadvertently plugged into ext. sp.
instead of a stereo jack?
Before commencing, I decided to locate C2 and C3, the two 470uF AF
output coupling capacitors on the circuit diagram - and that's where
I came off the rails. I can't find them! I know they are
physically on the main RF board and sit between the AF amp on the
DSP board and the KIO3, but scrutinising the maps has taken up a
couple of hours, and I've become obsessed with finding them.
Can anyone please help put me out of my misery?.......pass the bottle, please!
Season's Greetings to all and TIA.
Dave L G3TJP
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