Shure AD4D - Cables; Interface Locks; Encryption Mismatch; Firmware Mismatch

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Cables
Check that all cables and connectors are working correctly.
Interface Locks
The transmitter and the receiver can be locked to prevent accidental or unauthorized changes. A locked feature or button will
produce the Locked screen on the LCD panel or the lock icon will flash on a transmitter.
Encryption Mismatch
Re-sync all receivers and transmitters after enabling or disabling encryption.
Firmware Mismatch
Paired transmitters and receivers must have the same firmware version installed to ensure consistent operation. See Firmware
topic for firmware update procedure.
Tx Battery Hot
If the transmitter battery does not cool off, the transmitter will shut down. Let the device cool down and then consider swapping
the transmitter battery to continue operation.
Identify any possible external heat sources to the transmitter and operate the transmitter away from those external heat
sources.
All batteries should be stored and operated away from external heat sources in reasonable temperature conditions for best
performance.
Radio Frequency (RF)
RF LEDs
If neither blue RF Diversity LED is illuminated, then the receiver is not detecting the presence of a transmitter.
The orange RFSignalStrengthLEDsindicatetheamountofRFpowerbeingreceived.Thissignalcouldbefromthetransmit
ter, or it could be from an interfering source, such as a television broadcast. If more than two of the orange RF LEDs are
still illuminated while the transmitter is off, then that channel may be experiencing interference, and you should try a different
channel.
The red RF LED indicates RF overload. Overloads have the potential to cause interference in multiple system installations. If
you are experiencing an overload, turn off the receiver to see if it is causing interference with other components.
The numerical channel select button also turns red to indicate interference.
Dim red = Channel is not selected, experiencing interference
Bright red = Channel is selected, experiencing interference
Compatibility
Perform a Scan and Sync to ensure the transmitter and receiver are set to the same group and channel.
Look at the band label on the transmitter and make sure the receiver is set to the same band.
Reducing Interference
Perform a group or channel scan to find the best open frequency. Perform a sync to transfer the setting to the transmitter.