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Re: [oberheim] Finding Clock frequency of my OBXa [2 Attachments]

2015-03-24 by richtrix@...

I am thinking that this BlueDSO was a poor purchase. After that first day and those initial videos and pictures not a single voltage reading has been accurate when compared to my DVM. the +5MEM pin now reads out of range for some reason (like 15Volts) but my DVM reads it as a steady 4.3 Volts. Plus channel 2 does not work at all. I've contacted the dev. I went back to the service manual and tested every point with my DVM on the Upper Control Board. Everything is within tolerances. I'm pressed for time this week but I think I'll try next bending the rest of the pins and trying the Capacitor trick you mentioned Bob.

I didn't replace any other PSU parts I don't think and the replaced transistor was the right one.

I really appreciate everyone's input on this. I really am eager to have this thing at 100% again... well more like 150% since it will have midi.

I might haul the OBXa over to my friends house who has a proper oscilloscope and see if I see anything different.

Sincerely,
Rich Clarke

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