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Troubleshooting
Issue Indicator Status Solution
No sound or faint sound
Receiver RF LED on
• Verify all sound system connections or adjust gain as needed
(see Adjusting Gain).
• Verify that the receiver is connected to mixer/amplifier.
Receiver RF LED off
• Turn on transmitter.
• Make sure the batteries are installed correctly.
• Link transmitter and receiver (see Linking topic).
• Charge or change transmitter battery.
Receiver LCD screen off
• Make sure AC adapter is securely plugged into electrical
outlet.
• Make sure receiver is powered on.
Transmitter indicator LED
flashing red
Charge or change transmitter battery.
Transmitter plugged into
charger.
Disconnect transmitter from charger.
Audio artifacts or dropouts
rf LED flickering or off
• Change receiver and transmitter to a different group and/or
channel.
• Identify nearby sources of interference (cell phones, Wi-Fi ac-
cess points, signal processor, etc...) and shutdown or remove
source.
• Charge or change transmitter battery.
• Ensure that receiver and transmitter are positioned within sys-
tem parameters.
• System must be set up within recommended range and re-
ceiver kept away from metallic surfaces.
• Transmitter must be used in line of sight from receiver for op-
timal sound.
Distortion OL indicator appears on re-
ceiver LCD
Reduce transmitter gain (see Gain Adjustment).
Transmitter and receiver link unsuccessful Transmitter and receiver LEDs
flash to indicate that linking
started, but the link fails
Update both components to firmware version 2.0 or greater.
Download the Shure Update Utility application and follow the
instructions.
Sound level variations when switching to different
sources
N/A Adjust transmitter gain as necessary (see Gain Adjustment).
Receiver/transmitter won't turn off Transmitter LED flashing
rapidly
Controls locked. See Locking and Unlocking Controls.
Receiver gain control cannot be adjusted N/A Check transmitter. Transmitter must be on to enable gain
changes.
Receiver controls cannot be adjusted
LK shown on receiver display
when buttons are pressed
Controls locked. See Locking and Unlocking Controls.
Transmitter ID function does not respond Transmitter LED flashes green
3 times
Controls locked. See Locking and Unlocking Controls.
Transmitter information does not appear on the
Receiver LCD
N/A Linked transmitter is off or the receiver is not linked to a
transmitter.
Transmitter powers off after 1 hour Transmitter status LED off GLX-D transmitters automatically power-off after 1 hour to con-
serve battery life if the signal from a linked receiver is not de-
tected. Make sure that linked receiver is turned on.
Resetting the Receiver
Restores the receiver to the following factory settings:
• Gain level = default
• Controls = unlocked
Press and hold the link button while turning on the receiver power until the LCD
displays RE.
Note: When reset is complete, the receiver will automatically initiate linking to
search for a transmitter. Press and hold the transmitter link button within five sec-
onds of powering-on to complete the link.
Resetting Components
Use the reset function if it is necessary to restore the transmitter or receiver to their factory settings.
Resetting the Transmitter
Restores the transmitter to the following factory settings:
• Controls = unlocked
Press and hold the transmitter link button while turning on the transmitter until power
LED goes off.
When the link button is released, the transmitter will automatically initiate linking to
find an available receiver. Press the link button on an available receiver to relink.