SSM-50 (320-1213) Troubleshooting Faxback Doc. # 15499 The mixer should require very little maintenance. If you have problems, refer to this chart for possible solutions. If you cannot solve the problem, contact your local Radio Shack store for assistance. Nothing works Check the AC power connection. Make sure the AC outlet is "live." Check the power connections to the rest of the system (amplifier/receiver, etc.). No signal from an Check the control setting. audio input source Check the connections between the mixer and the input source. Hum from PHONO Connect the turntable's ground wire (usually black or green) to the GND screw on the back of the mixer. Hum from other Make sure there are no low level inputs connected inputs to the CD 1 and 2 jacks. Feedback Move the microphone further away from the output "squeals" speakers or use a directional microphone. (br/all-06/02/95)