Motorola XPR parts swap?

[phillydjdan]

I know this might be a shot in the dark, but you never know, right? I have a VHF XPR-4550 with a blown audio amp. I also have a VHF XPR-4350 that works, but lacks a display and more than 32 channels. Question is, is it possible to swap out the audio board or is the amp on a board with something that is not interchangeable? In the alternative, would it be possible to swap out just the audio amp (something I would pay an electronics tech to do) or are these parts simply not interchangeable? Any help would be appreciated.

 

[buddrousa]

Dan without the service manual you never know but if I had to guess I would say it is the same part.

 

[phillydjdan]

I'm leaning towards the single part being the same, I mean, why wouldn't it be? But the odds of the entire board being the same is the real long shot. It would be nice if I could open the radios and swap boards real fast, but if I have to swap the components themselves I would have to rely on a technician to handle that for me. Just trying to explore my options before I think about cracking one open.

 

[mancow]

I doubt there is just an audio board. I will try to look at the schematic but usually it's all integrated into one single board anymore.

 

[phillydjdan]

Ok, so my guy can't seem to get the one chip off of the one board, so I am trying to find an online source for the chip needed. I cannot seem to find the service manual or anything relating to the audio amp chip anywhere. Google has failed me...

 

[com501]

The part is called out in the detailed service manual. The part is available on MOL, the part is the same for all Gen 1 radios. The radio is a single board unit.

Parts removal requires hot air debonding techniques, some components require two surface heating. Some larger components are BGA's, not my favorite cup of tea.

 

[phillydjdan]

But, what's the part number???