Clear-Com KB-211, Руководство пользователя

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Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations
© Clear-Com Intercom Systems 1999
13
Rev. A
Scenario 2
The KB-211 has an internal failure.
Solution: Unit requires servicing.
• Speaker does not operate, but the Talk Light comes on when Talk
button is pressed.
Scenario 1
The Speaker switch is turned off, the volume knob is turned all the way down,
or the channel switch is set to the unused channel.
Solution: Adjust controls appropriately.
Scenario 2
The speaker plug or wiring has come loose.
Solution 2: Make sure speaker is connected internally.
Scenario 3
Plug P3 is missing on circuit board.
Solution: Plug P3 must be installed in J3 jack if the EB-TW or EB-4W options
are not used.
• Hum or buzz in the system.
Scenario 1
Inductive pickup caused by close proximity of this speaker 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
Intercom Level control at this station or another station is set too high.
Solution: Adjust.
Scenario 2
The Sidetone control at this station or another station is not correctly adjusted.
Solution: Adjust. Refer to “5—Sidetone Control” on page 4.
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 set to an unconnected channel.