Re: BlueSaab Legacy Amp PCB?

Posted by sbt on Nov 16, 2016; 2:45pm
URL: http://bluesaab-forum.90.s1.nabble.com/BlueSaab-Legacy-Amp-PCB-tp785p800.html

Seth wrote

Well the whole problem with <5.0 designs is that you have to break the signals from the rn52 to the cdc connector. That is not a easy thing to do. I supposed you could try to desolder the speaker pins on the CDC, bend them away, solder wires to an amp pcb v1.1, solder wires back to the bluesaab pcb, solder power and ground...but it's gonna be ugly. and a LOT of work.

I'm not saying it won't work. But I'm sure as hell not gonna make them like that for someone :)

Seth,

I was not suggesting using the amp pcb 1.1. I was suggesting a way to reduce the cost and messiness for retrofitting the legacy amp board inside the case, avoiding the need for any more connectors. You just need a pcb and components, so it shouldn't be much more than the amp v1.1, except due to square inches. But, you have to remove/desolder the CDC entirely from the old bluesaab module, and then re-solder it to the legacy amp. With the legacy amp board mounted upside down above the orginal PCB, the connector can still go through the hole in the plastic box. See extremely crummy diagram:



There should be enough wiring harness available in the car to twist through 180 degrees when mounting the box. The only additional wiring is 8 through hole connections with short lengths of hookup wire between the pcb holes on the edge of the legacy amp pcb and the pcb holes on the old module board where the CDC connector used to be. The only "messy" step is to desolder the connector; there's no cutting, bending or even trace cutting; all the bridge wiring is through-hole soldering (unless you delete the power supply and pickup 3.3V from the original board). Also, there's no more soldering than building the legacy amp outside the original BlueSaab with a flylead.