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Intercom System
SB-704
Clear-Com SB-704 User Manual
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SB-704 MAIN
STATION
3-1
MAINTENANCE
INTR
ODUCTION
This chapter provides maintenance
information, including a block di
agram and troublesho
oting tips.
Caution: These servicing instructions a
re for use by qualified personnel only
. T
o 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.
SB-704 BLOCK DIAGRAM
32
34
Table of Contents
Default Chapter
3
Table of Contents
3
Important Safety Instructions
5
Operation
7
Introduction
7
The Clear-Com Concept
7
Description
8
Normal Operation
10
Intercom Power Status Lights
10
Selecting Microphones and Enabling the Speaker
10
Listening to Intercom Channels
11
Talking on Intercom Channels
11
The All-Talk Function
11
Monitoring Main Program
11
Sending and Receiving Call Signals
12
Linking Intercom Channels Together
12
The Announce Function
12
Channel Assignments Using the Slide Switch Matrix
12
Remote MIC Kill Function
13
Hidden Front Panel Options and Adjustments
13
DIP Switch Options
13
Hidden Adjustment Controls
14
Rear Panel Options
15
Intercom Line Termination
15
Short-Circuit and Overload Conditions
15
Summary of Main Front-Panel Keys, Lights, and Controls
16
Installation
19
Installation Overview
19
Intercom Line Connection
19
Line Termination
19
Using the Link Function
19
Fail-Safe Power
20
Intercom Cable Considerations
22
Portable Installation Cable
23
Permanent Installation Cable
23
Wiring Diagram
23
Ground Isolation
23
Physical Installation
25
Description of Connectors
25
Headset Connector (Front Panel)
25
Panel MIC Connector (Front Panel)
25
Intercom Line Connectors (Rear Panel)
26
Program Input (Rear Panel)
26
Announce Output (Rear Panel)
26
IFB/HOT MIC (Rear Panel, 1/4-Inch Phone Jack)
27
External Speaker (Rear Panel, 1/4-Inch Phone Jack)
27
Accessory (Rear Panel, DB-15F)
27
Auxiliary Program Inputs
28
Remote MIC On/Off Switch
28
Announce Relay Contacts
28
Internal Option Jumpers
29
IFB Mode
29
Run/Test Mode Jumper
29
Program Audio Feed to Announce Output Jumper
29
Power Source Selection for Switchable Intercom Lines
30
Maintenance
33
Introduction
33
SB-704 Block Diagram
33
Technical Specifications
35
Mains Power
37
Rear Panel Connectors
37
Rear Panel Controls
37
Front Panel Connectors
37
Limited Warranty
39
Warranty Period
39
Technical Support
39
Warranty Repairs and Returns
40
Non-Warranty Repairs and Returns
41
Extended Warranty
41
Service Contract
41
Liability
41
4
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Clear-Com SB-704 Specifications
General
Brand
Clear-Com
Model
SB-704
Category
Intercom System
Language
English
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