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No audio from a FreeSpace IZA 190-HZ or  FreeSpace IZA 250-LZ Amplifier.

 

Relevant Product(s)

  • FreeSpace IZA 190-HZ
  • FreeSpace IZA 250-LZ

 

Issue/Resolution

  • No Paging Audio: The IZA 190-HZ and the IZA 250-LZ page input rear connection requires a PTT contact closure to operate. For a source without PTT, use the front mic/line input which is signal sensing.
  • No Program Audio: If the IZA 190-HZ and the IZA 250-LZ page input rear connection has a PTT contact closed, the Input A/B sources will be ducked - essentially muted.
  • No Program Audio:  If the FRONT MIC MIX – FRONT MIC DUCK dip switch determines if front-panel microphone input will be mixed in with music source or if the music output level will be automatically lowered (“ducked”) when someone speaks into microphone.  If it is set to "Duck" and a connected microphone's gain is set too high, the Input A/B sources will be ducked - essentially muted.

 

Troubleshooting Checklist from the FreeSpace IZA 190-HZ/IZA250-LZ Installation Manual

Power is on but no sound:

  • Make sure the input source is turned on.
  • Verify that there is an input signal from the source.
  • Check the cable connections from the source to the amplifier.
  • Ensure the desired source (A/B) is selected on the front panel.
  • If a user interface is connected to the Remote connector on the rear panel, make sure the desired source (A/B) is selected on user interface (user interface overrides the front-panel source select).
  • Make sure the Master Level control is turned up.
  • If a user interface is connected to the Remote connector on the rear panel, make sure the volume control on the user interface is turned up (user interface overrides the front-panel Master Level control).
  • Make sure that the output trim controls are turned up. 
  • Make sure an 1/8" (3.5 mm) TRS input cable is not connected to the Aux Input.

The Aux Input has a mechanical override feature so if an input cable is connected to it the selected Input A/B source will be automatically overridden - even if the Aux Input audio source is not playing or connected.

  • If a contact closure is connected to the Mute connector on the rear panel, check the switch to ensure the mute function has not been triggered.
  • If a source is connected to the Page connector on the rear panel, make sure it has not been triggered.
  • Make sure loudspeakers are connected properly.
  • Check that loudspeaker taps are set correctly.
  • Check that the amplifier has adequate ventilation. Improper ventilation could cause the amplifier to go into protection mode and no audio will be heard.
  • Ensure that the output wiring is correct. A short circuit will cause the amplifier to go into protection mode and no audio will be heard.
     

Power is on, but sound is low:

  • Verify that the audio input source output is turned up to a nominal level.
  • Check the cable connections from the source to the amplifier.
  • Increase input level of source with Gain controls on amplifier. Turn Gain knob up until you start seeing red Input Clip LED on front-panel. Then turn Gain down until red LED Input Clip does not engage.
  • Make sure Output Trim controls on amplifier are not turned down too much.
  • If a user interface is connected to the Remote connector on the rear panel, make sure the volume control on the user interface is turned up (user interface overrides the front-panel Master Level control).
Keywords: IZA 190-HZ, IZA 250-LZ
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