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Troubleshooting
Issue
No sound or faint sound
Audio artifacts or dropouts
Distortion
Transmitter and receiver link unsuccessful
Sound level variations when switching to dif-
ferent sources
Receiver/transmitter won't turn off
Receiver gain control cannot be adjusted
Receiver controls cannot be adjusted
Transmitter ID function does not respond
Transmitter information does not appear on
the Receiver LCD
Transmitter powers off after 1 hour
Resetting Components
Use the reset function if it is necessary to restore the transmitter or receiver to their factory settings.
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 seconds of
powering-on to complete the link.
Indicator Status
Solution
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
• Make sure AC adapter is securely plugged into electrical outlet.
off
• Make sure receiver is powered on.
Transmitter indicator
Charge or change transmitter battery.
LED flashing red
Transmitter plugged
Disconnect transmitter from charger.
into charger.
rf LED flickering
• Change receiver and transmitter to a different group and/or channel.
• Identify nearby sources of interference (cell phones, Wi-Fi access points, sig-
or off
nal processor, etc...) and shutdown or remove source.
• Charge or change transmitter battery.
• Ensure that receiver and transmitter are positioned within system parameters.
• System must be set up within recommended range and receiver kept away
from metallic surfaces.
• Transmitter must be used in line of sight from receiver for optimal sound.
OL indicator appears
Reduce transmitter gain (see Gain Adjustment).
on receiver LCD
Transmitter and re-
Update both components to firmware version 2.0 or greater. Download the
ceiver LEDs flash to
Shure Update Utility application and follow the instructions.
indicate that linking
started, but the link
fails
N/A
Adjust transmitter gain as necessary (see Gain Adjustment).
Transmitter LED
Controls locked. See Locking and Unlocking Controls.
flashing rapidly
N/A
Check transmitter. Transmitter must be on to enable gain changes.
LK shown on receiver
Controls locked. See Locking and Unlocking Controls.
display when buttons
are pressed
Transmitter LED
Controls locked. See Locking and Unlocking Controls.
flashes green 3 times
N/A
Linked transmitter is off or the receiver is not linked to a transmitter.
Transmitter status
GLX-D transmitters automatically power-off after 1 hour to conserve battery
LED off
life if the signal from a linked receiver is not detected. Make sure that linked
receiver is turned on.
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.
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