President JFK ASC module wiring

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13EL121
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President JFK ASC module wiring

Post by 13EL121 »

Hi friends, HNY!
Just got a JFK in where the ASC is not working. Preowner has activated Roger Beep at the Power adjustment. If Roger Beep is enabled, squelch does not work. So i am looking for schematic for the Uniden PA-338AC JFK with ASC.
Thanks and 73s,
Ralf
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Re: President JFK ASC module wiring

Post by 14CS06 »

Hello Ralf

Please look at these pics for JFK and JFK ASC


Image

Image

Image

Image

Mods for make independent Beep and ASC

Sorry in french

Image

Image

Schematic without ASC

Image

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Re: President JFK ASC module wiring

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:thumbup: Excellent Claude! Thank you very much. Will have a look at it.
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Re: President JFK ASC module wiring

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The wire colours seem to be different here. What a mess...
ASC wiring here:
Orange and yellow are not used in mine. Brown and black are grounded together to volume switch. Green goes to the pull switch. Red goes to 8v, blue to a resistor to PCB.
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Re: President JFK ASC module wiring

Post by 14CS06 »

Hello Ralf

Other pics

Image

Image

Image

Image

Image

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Re: President JFK ASC module wiring

Post by 13EL121 »

Many thanks Claude! The wireing looks good so far. A picture from the soldering side would be great. I only see one from the JFK Classic without ASC. In mine there are a red and orange wire soldered together to one solder point.
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Re: President JFK ASC module wiring

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Hello Ralf

Is this ?

Image

From

http://spectrum26.pagesperso-orange.fr/

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Re: President JFK ASC module wiring

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Perfect Claude! :thumbup:
But it looks like mine. Can not see any difference in the section where both cables are soldered together. Hmmm...so i think the magic is the pull switch.
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Re: President JFK ASC module wiring

Post by 13EL121 »

Fixed...i removed the ASC module as i did not found the fault. Resoldered the tracks and squelch wire. Finally i removed the ASC Stickers and added a 1000uf capacitor for better voltage filtering. Now it is a JFK without ASC and working fine. Roger Beep and Squelch now working as it should. Thanks for your help my friend Claude. :thumbup: :thumbup:
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Re: President JFK ASC module wiring

Post by Crusader »

Hi guys, i have a ASC JFK here & the blue wired from it with the resistor has come loose & i need to know where it fixes to so that i can resolder it back in to position.

I can see by the pictures on here it attaches somewhere near the front end of the pcb near the oblong black 455khz ceramic filter, but i cannot see exactly where it attaches.
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Re: President JFK ASC module wiring

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Hope this helps...
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Re: President JFK ASC module wiring

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Soldered on the top end of the resistor.
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Re: President JFK ASC module wiring

Post by Crusader »

13EL121 wrote: 21 May 2019, 16:19 Soldered on the top end of the resistor.

Hi,sorry for the delay in me replying & thank you for the pictures, yes i realised the blue wire attached to the resistor, i just wanted to know where the resistor soldered to? by the looks of it to the resistor next to D5.

Best 73, Shaun :thumbup:
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Re: President JFK ASC module wiring

Post by 14CS06 »

Hello

here

@+
Claude
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Re: President JFK ASC module wiring

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14CS06 wrote: 09 Jun 2019, 07:59 Hello

here

@+
Claude

Fantastic Claude, as i suspected :)

Many thanks Guys :thumbup:
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