Troubleshooting - ClearCom KB-212 User Manual

Clear-Com Intercom Systems
Panel Mic
Mic Mute
Talk
Microprocessor
16 VAC
Rectifier
4-Wire
Option

Troubleshooting

•
Scenario 1
No intercom connection to the KB-212. If the EB-4W 4-Wire Option Module is
connected, no AC power to the KB-212.
© Clear-Com Intercom Systems 2000
EQ/
LIM
Mic Gain
Talk
Operating
Mode
Options
Power
2-Wire / 4-Wire
Select
FIGURE 5: KB-212 Block Diagram
System does not operate. The Talk Light does not come on when
Talk button is pressed.
Intercom
Volume
Speaker
Mute
Min
Vol
Call Alert Program
Tone Level Level
Call
Call
Light
Call Send &
Receive TW Option
9
KB-212 Speaker Station
Speaker
Balanced
Program
Program
Mute
Input
Power
Common
+30 VDC
Intercom
(NC)
Ground
4-Wire
Input
4-Wire
Output
Rev. B