Loewe REFERENCE 52 SL FHD+ 200 NMP Service Manual page 118

Service mode request: Press the Menu button on the device control panel, select the „Service" item
with the remote control and press the Menu button on the remote control within one second. Now call
up the „MediaNetwork" and „Show data" items in the service menu.
In this case, Version 901160 is installed.
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