I too have a problem with my Ovation 2778LX's Op-Pro preamp. It's about 14 months old and noticed it was burning through batteries pretty fast. Last week the tuner portion of the preamp quit working but the preamp itself works ok (still burns through 9v batts quickly though). Does anyone know where I can get a schematic, or is anyone aware of tuner issues with the Op-pro? Love the electronic tuner but thought I'd troubleshoot before dropping $140. Thanks!
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