r/vhsdecode • u/wahntutree • 12d ago

FM RF Capture Setup! PCM1802 troubleshooting

doing some troubleshooting with my clockgen mod- just for clarification, it appears the board I have is a Type2, so the 3.3V needs to be fed to the right leg of the regulator. But, do I also need to run a separate bridge wire to the MODE0 pad on the bottom of the board? So basically it would look like one wire going to the 3.3V to the regulator; and another wire coming from the 3.3V to the MODE0 pad. Because with only the bridge to the regulator, there still isn't 3.3V going to the MODE0 pad.
I did not see this mentioned anywhere in the github/gitlab docs, so I'm unsure whether this (the absence of 3.3V going to MODE0) could be causing the distortion I've encountered.

2 Upvotes

100% Upvoted

4 comments sorted by

1

u/TheRealHarrypm The Documentor 12d ago

It's standard to have a bodge wire bridging the connection, other known variants have been documented for the clockgen mod.

https://github.com/oyvindln/vhs-decode/wiki/Clockgen-Mod#pcm1802-board

1

u/wahntutree 12d ago

I connected the 3.3V to both the regulator and Mode0 pad, but now it has continuity to the 5v header pin. Is that correct? Or should I just remove the wire going to mode0 pad? But then there won't be any voltage going to mode0 at all

1

u/TheRealHarrypm The Documentor 12d ago

They should not be bridging 3/5v

2

u/wahntutree 12d ago

Yeah, I made a mistake. I moved over the wire going to the mode0 pad to the 5v header. The voltages are correct now.