P6 some voice wont tune
2012-06-04 by troels jørgensen
Hi folks. Having fought and fought to get this p6 to work, i refuse to give up now!!! I soldered new traces around the battery, change battery type. Soldered in 3 sockets and replaced the ic's soldered in new traces on the board left board - YES! the acid had reached the underside of the other board so the gain/att pot didnt work at all. I fixed stuck keys as well.. and now: im having an issue with the p6 where 2 of the 6 voices wont tune properly - i got the first osc to track fine over the whole keyboard/octave ranges, but 2 of the voices cant be tuned properly - it is as if the low pot cant go high enough - its at 10 but i want it to go to 11. Right before the Low trimpot there is a resistor (22m). So my logic tells me that i need to take add another resistor in the path to the pot to make it go to "11". Im just thinking of buying various resistors and try them out, but any idea in what range i should go? maybe a 100k? thanks:) [Non-text portions of this message have been removed]
