If passthrough isn't enabled, then the classroom speakers connected to the projectors won't work if the projector is turned off.

Applies to models VPL-PHZ61/PHZ51

Step-by-step guide

Disable internal speaker, and ensure audio output is always on.

1. Press the MENU key
2. Select 'Function' - 'Speaker' and set to "Off"
3. Select 'Function' - 'Speaker Setting' and set to "Always On"

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