President JFK ASC module wiring

A forum for the discussion of matters of a technical nature. All such activities are undertaken at the readers discretion and own risk. If you don't know what you are doing, don't blame us if it all goes wrong!
Post Reply
User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

President JFK ASC module wiring

Post by 13EL121 » 04 Jan 2019, 06:24

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

User avatar
14CS06
Top Poster
Top Poster
Posts: 1060
Joined: 04 Mar 2012, 09:15
Location: JN33LN - ALPES-MARITIMES-06 France

Re: President JFK ASC module wiring

Post by 14CS06 » 04 Jan 2019, 21:25

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

@+
Claude
Photo Collector CB RADIO

User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

Re: President JFK ASC module wiring

Post by 13EL121 » 05 Jan 2019, 08:57

:thumbup: Excellent Claude! Thank you very much. Will have a look at it.

User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

Re: President JFK ASC module wiring

Post by 13EL121 » 05 Jan 2019, 10:15

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.
You do not have the required permissions to view the files attached to this post.

User avatar
14CS06
Top Poster
Top Poster
Posts: 1060
Joined: 04 Mar 2012, 09:15
Location: JN33LN - ALPES-MARITIMES-06 France

Re: President JFK ASC module wiring

Post by 14CS06 » 05 Jan 2019, 10:40

Hello Ralf

Other pics

Image

Image

Image

Image

Image

@+
Claude
Photo Collector CB RADIO

User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

Re: President JFK ASC module wiring

Post by 13EL121 » 05 Jan 2019, 12:11

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.

User avatar
14CS06
Top Poster
Top Poster
Posts: 1060
Joined: 04 Mar 2012, 09:15
Location: JN33LN - ALPES-MARITIMES-06 France

Re: President JFK ASC module wiring

Post by 14CS06 » 05 Jan 2019, 14:40

Hello Ralf

Is this ?

Image

From

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

@+
Claude
Photo Collector CB RADIO

User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

Re: President JFK ASC module wiring

Post by 13EL121 » 05 Jan 2019, 16:32

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.

User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

Re: President JFK ASC module wiring

Post by 13EL121 » 05 Jan 2019, 19:52

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:
You do not have the required permissions to view the files attached to this post.

User avatar
Crusader
Veteran
Veteran
Posts: 2807
Joined: 27 Nov 2008, 23:43
Location: South Cumberland

Re: President JFK ASC module wiring

Post by Crusader » 19 May 2019, 19:50

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.

User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

Re: President JFK ASC module wiring

Post by 13EL121 » 21 May 2019, 16:16

Hope this helps...
You do not have the required permissions to view the files attached to this post.

User avatar
13EL121
Super Member
Super Member
Posts: 419
Joined: 16 Sep 2008, 20:55
Call Sign: 13DA121
Location: Germany
Contact:

Re: President JFK ASC module wiring

Post by 13EL121 » 21 May 2019, 16:19

Soldered on the top end of the resistor.
You do not have the required permissions to view the files attached to this post.

User avatar
Crusader
Veteran
Veteran
Posts: 2807
Joined: 27 Nov 2008, 23:43
Location: South Cumberland

Re: President JFK ASC module wiring

Post by Crusader » 09 Jun 2019, 01:45

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:

User avatar
14CS06
Top Poster
Top Poster
Posts: 1060
Joined: 04 Mar 2012, 09:15
Location: JN33LN - ALPES-MARITIMES-06 France

Re: President JFK ASC module wiring

Post by 14CS06 » 09 Jun 2019, 07:59

Hello

here

@+
Claude
You do not have the required permissions to view the files attached to this post.
Photo Collector CB RADIO

User avatar
Crusader
Veteran
Veteran
Posts: 2807
Joined: 27 Nov 2008, 23:43
Location: South Cumberland

Re: President JFK ASC module wiring

Post by Crusader » 09 Jun 2019, 22:07

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

here

@+
Claude

Fantastic Claude, as i suspected :)

Many thanks Guys :thumbup:

Post Reply