MR-202/MR-204 Two- and Four-Channel Headset Stations
Clear-Com Intercom Systems
Rev. B
10
© Clear-Com Intercom Systems 2000
Scenario 2
Defective headset.
Solution: Test with another headset.
Scenario 3
Plug P3 is missing on circuit board.
Solution: Plug P3 must be installed in the J3 jack if the EB-4W or EB-TW
option is not used.
•
Hum or buzz in system
Scenario 1
Inductive pickup caused by close proximity of this headset station or
connected stations to power lines or transformers.
Solution: Relocate the offending unit or wiring. If the cable run is exceptionally
long, consider adding and using the EB-4W 4-Wire Option Module. (Requires
an additional 4-wire interface at the opposite end of the “long run.”)
•
System feedback (Acoustical)
Scenario 1
Listen Level control at this station or another station is set too high.
Solution: Adjust.
Scenario 2
Sidetone Null control at this station or another station is not adjusted correctly.
Solution: Adjust. Refer to “Front Panel” on page 3.
Scenario 3
Channel not terminated.
Solution: Set the Main Station or Power Supply termination switch for that
channel to the ON position.
Scenario 4
The Channel switch is set to an unconnected channel.
Solution: If less than the maximum number of intercom lines are to be
connected, link unused intercom inputs to a connected input with jumper
wires.
Scenario 5
A headset extension cord was used.
Solution: Headset extension cords are not recommended because they
increase crosstalk.
