Actually a well set up solder flow machine usually
does an excellent and permanent job of soldering everything on the boards. There are many boards in that unit, yet this is the only board that ever had this problem. I believe the reason the replacement Pioneer boards fail is because they resolder them the way most local techs do - just the presently bad conn's.
The tiny number of exceptions to 100% as to what needs to be resoldered on that board have been stipulated by me many times on this thread. Suffice it to say that no, as Johnla says, you cannot
get away with just resoldering a smattering of the bad joints. Doing that will come back to bite you on the butt later. And when it does, the result may be your set getting totalled, since the more innocent conn's may have already been soldered now properly, leaving the much more UN
innocent ones still in play and ready to let themselves loose later.
If you don't want to take any chances and are not a repair or assembly professional who does this type of thing every day, don't even think about doing it yourself. Far too much is riding on it. Those joints are very tiny and very close to each other. It's extremely easy to do a solder bridge and not realize it. Who knows what would happen then, on turn-on? I don't, and don't want to learn the hard way! If you are a beginner at soldering or even journeyman class, leave it to an extreme professional who does it every day.
If you want it done right, send it to me. My way of doing it is the ONLY way that works, and works permanently. I am the one who came up with the only permanent fix for this problem that has been proven for years now, to be 100%.
If you just buy a replacement board - new boards disappeared years ago, the only boards now available from Pioneer are refurbs of core charge returned boards - you will be sacrificing the original board your set was calibrated on at the factory, and hence the board your entire unit was originally set up on. They are a matched set. Keep them that way. Don't buy a refurb that not only will be a different board from the one your unit was set up on, but was also not resoldered properly as a refurb - not resoldered the only way possible, to keep this problem from ever coming back. 100% minus a tiny number of very logical and simple exceptions. 99% net.