23
ADVANCED TROUBLESHOOTING
This section is designed for use by a QUALIFIED RADIO TECHNICIAN only!
The headset was working properly, but has now failed. Make sure you read and understand the entire procedure before
attempting any of the troubleshooting steps in this section.
If there are questions regarding this information, contact
your local Sonetics Dealer for more information before proceeding with the troubleshooting steps.
The System Test on page 16 is also a helpful tool in isolating and determining the actual symptoms of the problem.
THERE IS NO SOUND IN THE HEADSET FROM EITHER THE INTERCOM OR THE RADIO
•
Check the headset Volume Control. Make sure it is not turned all the way down.
•
Check the headset configuration for faulty connections or components.
•
Verify that some of the Volume Indicator LEDs on the front panel of the intercom are lit, indicating that the
intercom is powered on.
•
Measure the voltage between pins 1 & 2 on the Power Cable. There should be at least 12 volts DC present, and
not more than 36 volts DC.
•
Check the wiring to the intercom and any fuses or circuit breakers in the power circuits to the intercom and
correct any faults.
•
If there is sufficient power to the intercom, and it doesn’t work, the Intercom Unit is faulty. Contact Sonetics
Service for a Return Material Authorization (RMA) Number to return the Intercom Unit for repair.
THERE IS SOUND IN THE HEADSET FROM THE INTERCOM, BUT NOT FROM THE RADIO
(Perform one or more of the following as needed.)
•
Check the radio gain levels (Rx gain).
•
Check the radio volume. Make sure it is not turned all the way down.
•
If there is no audio from the radio’s speaker:
o
Disconnect the Radio Interface Cable from the radio. If there is audio from the radio’s speaker, the Radio
Interface Cable is faulty.
o
If there is still no audio from the radio’s speaker, the radio is faulty.
o
Disconnect the Radio Interface Cable from the back of the intercom unit. If there is audio from the
radio’s speaker, the Intercom Unit is faulty. Contact Sonetics Service for a Return Material Authorization
(RMA) Number to return the Intercom Unit for repair.
•
If there is audio from the radio’s speaker, check the connections to pins 6 & 7 on the Radio Interface Port on the
back of the intercom unit.
•
Verify that Receive Audio is present by listening to the radio’s speaker.
o
Try swapping the intercom unit with a known good one (if one is available). If the problem persists, the
problem is in the Radio or the Mobile Radio Interface wiring.
o
If no fault can be found, then the fault must lie in the Intercom Unit. Contact Sonetics Service for a
Return Material Authorization (RMA) Number to return the Intercom Unit for repair.
THERE IS SOUND IN THE HEADSET FROM THE RADIO, BUT NOT FROM THE INTERCOM
•
Check the headset location for faulty connections or components. See Troubleshooting a Headset Configuration
(page 23).
•
The Intercom Unit is faulty. Contact Sonetics for a Return Material Authorization (RMA) Number to return the
Intercom Unit for repair.
THERE IS SOUND IN ONLY ONE EAR
•
Check to see if the headset is a model UH-51S headset. The UH-51S has one slotted ear dome without a speaker
in it. This is normal operation for a UH-51S.
•
The headset is faulty. Contact Sonetics for a Return Material Authorization (RMA) Number to return the headset
for repair.
