Clear-Com KB-701 - Manual (Page 15)

K B - 7 0 1 S P E A K E R S T A T I O N
3 - 1
MAINTENANCE
This chapter provides maintenance information including a block diagram and troubleshooting tips.
Caution:These servicing instructions are for use by qualified personnel only. To reduce the risk of electrical shock,
do not perform any servicing other than that contained in the operating instructions unless you are qualified
to do so.
KB-701 BLOCK DIAGRAM
The following is a block diagram of the KB-701 speaker station:
Figure 3-5: Block diagram of the KB-701
EQ/
LIM
Talk
Min
Vol
Call
Light
Call
Intercom
Volume
TW Option
Intercom
Speaker
Power
(NC)
Call Send &
Receive
Microprocessor
Talk
Balanced
Program
Input
Speaker
Mute
Program
Mute
Mic Mute
Common
+30 VDC
Ground
Operating
Mode
Options
Mic Gain
Program
Level
Call Alert
Tone Level
4-Wire
Input
4-Wire
Output
2-Wire / 4-Wire
Select
Rectifier 16 VAC Power
4-Wire
Option
Panel Mic