SSM-100 (320-1212) Troubleshooting Faxback Doc. # 7718 The SSM-100 mixer should require very little maintenance. If you do 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 one of the GND screw on the back of the mixer. Hum from other Make sure there are no low level inputs inputs connected to the CD 1, CD 2 and CD 3 jacks. Feedback "Squeals" Move the microphone further away from the output speakers or use a directional microphone. (LB/all-09/29/94)