Clear-Com KB-702GM - Manual (Page 19)

K B - 7 0 2 / K B - 7 0 2 G M T W O - C H A N N E L
3 - 1
MAINTENANCE
This chapter provides maintenance information including block diagrams and tips for solving problems.
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.
BLOCK DIAGRAM FOR THE KB-702
Figure 3-7: KB-702 Block Diagram
EQ/
LIM
Headset
Mic
Talk
Sidetone
Null
Call
Light
Call
Intercom
Volume
Speaker
On/Off
TW Option Channel
Switch
Ch. A
Speaker
Power Ch. B
Call Send &
Receive RMK
Microprocessor
Talk
Headset
Output
Balanced
Program
Input
Speaker
Dip
Program
Mute
Mic
Mute
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.