Ok, things are not so good in my shed at the moment
Fixed the pins on the interconnect board, ran some new traces, was all looking good. Checked all fuses in machine, checked all coil resistances everything was good. Connected everything back up except the display board and turned the machine on..... Backboard lights came on, speaker made a few noises and i was pretty happy. Then after about 5 seconds the shaker motor started and there was a spectacular flame and sparking from the shaker motor, a few sparks from the boards and i quickly pulled the plug.
On brief inspection, there are a few chips gone on the CPU board - one gone on the audio board, maybe a relay on the CPU but the new transformer and power supply board look OK at the moment (the transformer still works - i disconnected everything and it fired up OK).
After that, i left the plug out and took the boat out wakeboarding for the arvo so i didn't have to think about it.
So i guess from now i have to pull all the boards off and assess the damage - then make a call to cut my losses (don't really know what to do with it though?) or persevere and continue to repair.
My initial thought is there is a serious issue with the shaker motor (which i think someone suggested earlier - i never even pulled it apart: lesson learned) and this has gone back through the rest of the system. The reason for this thought is why did the shaker motor start of its own accord about 5 secs after powering up - i assume this is NOT part of the self diagnostics? I haven't looked to see which if any fuses have blown, although the machine did not stop - i had to pull the plug.
Someone also suggested the possibility the line filter might be dodgy and allowed a spike through?
I may have a bit of a look tommorrow arv and put the project on the backburner for a few weeks....i guess that will give me the chance to wait a while and fal over some of the elusive UDN 7180 ic's.....
