Uniden Madison (mb8719) PC-411AD schematic

[Cable Guy]

Looking for the schematic, this board is similar to a cobra 2k but has many differences. It is also related to the stalker xx. I found something of a service manual but it is difficult to read the schematic. Does anyone have what I need and willing to share? Thanks.

 

[Cable Guy]

Found this, going to check it out.

 

[tramd]

Found this, going to check it out.

I think this is probably what you have already.

 

[Cable Guy]

I think this is probably what you have already.

Thanks, that's pretty much what I found so far. This AD revision is kinda different.

 

[BayouRadioAmplifier]

inquiring minds here want to know what your malfunction
is with that Madison radio?

I have worked on several of these Uniden boards now,
and am taking a liking to them.

I had a Madison a few weeks ago, with the carrier osc
xtal X4 falling out off the board due to the corrosive glue.

 

[Cable Guy]

inquiring minds here want to know what your malfunction
is with that Madison radio?

I have worked on several of these Uniden boards now,
and am taking a liking to them.

I had a Madison a few weeks ago, with the carrier osc
xtal X4 falling out off the board due to the corrosive glue.

Well, I have been recapping, removing various mods and replacing clipped components. Everything is back to stock except the am modulation adjustment. It is limiting now due to replacing the transistor and diode, but there is no control via vr12. The modulation limit circuit is different, and I'm trying to find a schematic that represents what's going on so I can fix it. I haven't had much time to look into it this week.

 

[Lkaskel]

Hey Cable Guy,
So, I have a Stalker XX and it has the 8734 chip in it. The Sams manual for it shows the 8734 as well. I think that the export version of the Stalker XX may have come with the 8719 and that may be the schematic that you have. The Madison V2 is shown in the Sams 230. It shows the 8719 chip so that may be what you are looking for. See attached.