User manual

KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems
Rev. A
12
© Clear-Com Intercom Systems 1999
FIGURE 7: KB-211GM Block Diagram
Troubleshooting
•
System does not operate. Talk Light does not come on when Talk
button is pressed
.
Scenario 1
The KB-211 doesn’t have an intercom connection. If the EB-4W 4-Wire Option
Module is connected, the KB-211 may not be receiving AC power.
Solution: Check connections and cable.
EQ/
LIM
Mic Select
Headset
Mic
Panel
Mic
Talk
Sidetone
Null
Call
Light
Call
Intercom
Volume
Red /
Green
Speaker
On/Off
TW Option
Channel
Switch
Ch. A
Speaker
Power
Ch. B
Call Send &
Receive
RMK
Microprocessor
Talk/
VOX
Headset
Output
Balanced
Program
Input
Speaker
Dip
Program
Mute
Mic Dip /
Mute
VOX
Common
+30 VDC
Ground
Latch
Disable
Long Line
Program
Level
Call Alert
Tone Level
4-Wire
Input
4-Wire
Output
2-Wire / 4-Wire
Select
Rectifier
16 VAC
Power
Ch. B
Ch. B
Ch. A
Ch. A
4-Wire
Option
Single
Chan.