Helping a friend revive her father's Technics Turntable SL-BD20. We hooked it up to Technics Receiver SA-EX310 and Bose Model 141 Speakers. Plays for a few seconds and then receiver has "Overload" error message. What did we do wrong? I double checked that the speaker polarity was correct. Do we need different receiver and/or speakers? Your help is appreciated.