Troubleshooting a semi-working board
Posted: Mon May 08, 2017 3:28 am
I've already implemented a board using the FV1, but it was super hard to solder in a logical order, so I redrew it. Just finished putting together the revision and I have a weird issue - I get audio through (both dry and wet - I've got a mix pot) but the signal keeps flashing out to a kind of static noise, at which point the clip LED lights. The static noise manifests sort of like the patch you're currently using from the EEPROM - i.e. on a pitch shifter, it has a differnt quality to a reverb patch, etc, which makes me think that there is a clean path from FV1 output to the output jack.
The weird thing is that if I push against the FV1 with my thumb, the signal resolves and the glitching over to the static either disappears or becomes much more infrequent.
That sort of suggests to me it's the opposite of a ground as it's not them touching the case or something like that.
I've checked the continuity of the pins on the FV1 and there are no shorts. The connections look okay with a magnifying glass, but maybe there are some dodgy connections, it's possible. I've checked the voltages and they seem in-line with the previous revision of the board, which I know works fine.
Could it be that I need to reflow the connections on the FV1? Maybe it's intermittent?
Is there anything else I should try?
The weird thing is that if I push against the FV1 with my thumb, the signal resolves and the glitching over to the static either disappears or becomes much more infrequent.
That sort of suggests to me it's the opposite of a ground as it's not them touching the case or something like that.
I've checked the continuity of the pins on the FV1 and there are no shorts. The connections look okay with a magnifying glass, but maybe there are some dodgy connections, it's possible. I've checked the voltages and they seem in-line with the previous revision of the board, which I know works fine.
Could it be that I need to reflow the connections on the FV1? Maybe it's intermittent?
Is there anything else I should try?