Reply To: DIY Build problem

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#27646
brach
Participant

Thank you for the photo. You can still make it work.
The main problem I see in the photo is that the copper trace from one pad of the opto1 to TP1 is ripped off. You need to install the optocoupler again and then run a jumper wire from that pin of the optocoupler to the hole of TP1. Don’t try to solder to that pad of the optocoupler because it has been damaged and probably won’t accept solder or pass an electrical connection. You need to use a tiny wire for this jumper…something you would find inside of a USB cable or DVI video cable or something like that. See Appendix C in the troubleshooting guide for more about how to run a jumper wire.
Once the optocoupler and jumper wire are installed, work through Appendix A of the troubleshooting guide. This will help you decide what is wrong with the “high” side. If you don’t understand any of the steps, let me know and i’ll try to walk you through it. These problems usually are caused by bad solder joints. So please re-solder any of the joints that are around that area…especially: Q1, R14, VR8, and R8.
Good luck!
-Brach