Clear-Com KB-702GM - User Manual

Questions and Answers

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Maria MitchellAug 12, 2025
Why am I getting system feedback (acoustical) in my Clear-Com KB-702GM Intercom System?
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  xrobinsonAug 12, 2025
  Acoustical feedback in your Clear-Com Intercom System can occur if the intercom level control at one or more stations is set too high. Try adjusting the level. It can also happen if the sidetone null control isn't adjusted correctly; in this case, adjust the sidetone null control. Also, ensure the channel is properly terminated by setting the main station or power supply termination switch for that channel to the on position. If you're using an unconnected channel, set option switch #1 to the on or closed position to link both channel switch positions to the same intercom line. Finally, avoid using headset extension cords as they are not recommended.
S
Samantha BurtonAug 16, 2025
What to do if the speaker does not operate on my Clear-Com KB-702GM but the talk button lights amber?
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  Mary ObrienAug 16, 2025
  If the speaker on your Clear-Com Intercom System isn't working, and the talk button lights amber when pressed, first check if the speaker switch is turned off, the volume knob is turned all the way down, or the channel switch is set to an unused channel. Adjust these controls as needed. Also, make sure the speaker is properly connected internally, as a loose speaker plug or wiring could be the cause. Lastly, if you're not using the EB-TW or EB7-4W options, ensure that plug P3 is installed in jack J3 on the circuit board.
K
Kimberly WhiteAug 19, 2025
Why does the program signal sound distorted on my Clear-Com KB-702GM?
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  Pamela HuffmanAug 20, 2025
  If you're experiencing program signal distortion in your Clear-Com Intercom System, it could be due to the program level control being set too high. Try turning the program level control counter-clockwise. Alternatively, the program input circuit might be overloaded. In this case, reduce the gain of the program signal at the source, such as an audio mixer.
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Rebecca MitchellAug 23, 2025
How to troubleshoot VOX problems on my Clear-Com Intercom System (KB-702GM)?
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  rjamesAug 23, 2025
  If the VOX feature on your KB-702GM Clear-Com Intercom System is causing problems, where it either stays tripped (amber light on) or won't trip with voice, the sensitivity setting is likely the issue. If it stays tripped, turn the VOX sensitivity control counter-clockwise. If it won't trip, turn the VOX sensitivity control clockwise. Remember that VOX is designed for close-in operation.
J
John MaxwellAug 27, 2025
What to do if the call signal does not function on my Clear-Com KB-702GM?
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  Jerry MooreAug 27, 2025
  If the call signal on your Clear-Com Intercom System isn't functioning, it could be due to excessive DC loading of the intercom line. Remove any audio transformers or other equipment connected across the intercom line. Also, ensure that each intercom channel is terminated at only one point. Finally, if you're not using the EB7-4W or EB7-TW options, make sure plug P1 is installed in jack J1.
S
Sean RoachAug 30, 2025
Why is there a hum or buzz in my Clear-Com KB-702GM Intercom System?
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  Elizabeth CummingsAug 30, 2025
  Humming or buzzing in your Clear-Com Intercom System can be caused by inductive pickup from nearby power lines or transformers. Try relocating the unit or wiring. For exceptionally long cable runs, consider adding and using the EB7-4W four-wire option module, which requires an additional four-wire interface at the opposite end of the long run.
J
Jeremy SimmonsSep 3, 2025
What causes excessive crosstalk in my Clear-Com Intercom System?
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  Matthew LopezSep 3, 2025
  Excessive crosstalk in your Clear-Com Intercom System can be caused by several factors. First, high DC resistance may have a ground return. Use heavier cable or add additional conductors to the ground return. For exceptionally long cable runs, consider adding and using the EB7-4W four-wire option module. Second, if using multi-channel cable, ensure the pairs are individually shielded and replace the cable if they are not. Lastly, check your headset cables. Correct the wiring if necessary and use headsets with properly shielded wiring.
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Raymond MartinSep 7, 2025
Why does my Clear-Com KB-702GM Intercom System not operate and the talk button not light?
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  Leah GreerSep 7, 2025
  If your Clear-Com Intercom System isn't operating and the talk button isn't lighting up, the issue might be with the intercom connection to the KB-702. If the EB7-4W four-wire option module is connected, the KB-702 may not be receiving AC power. Check the connections and cable. If the connections are good, the KB-702 may have an internal failure and require servicing.

Summary

IMPORTANT SAFETY INSTRUCTIONS

EMC AND SAFETY

OPERATION

INTRODUCTION

Provides a welcome and general guidance for using the product manual.

DESCRIPTION

Details the features and functionalities of the KB-702 and KB-702GM speaker stations.

FRONT PANEL

Details the controls, indicators, and connectors located on the front panel.

Talk Button and Indicator

Explains the dual-action talk button and its indicator lights for communication.

Call Button and Light

Describes the function of the call button for signaling and its indicator status.

Tone Alert

Details the audible tone alert for incoming call signals and its adjustability.

Volume Control

Explains how to adjust the listening volume for the speaker or headset.

Sidetone Control

Describes how to adjust the level of the user's own voice heard in the headset.

Program Level Control

Explains how to set the level for the program audio input.

Speaker On;Off Switch

Details the switch to turn the front panel speaker on or off.

Mic Select Switch

Explains the switch for selecting between panel mic and headset mic.

Channel Switch

Describes how to select between intercom channels A and B.

Headset Connector

Details the front panel connector for headsets and microphones.

Panel Mic Connector

Describes the connector for optional gooseneck panel microphones on the KB-702GM.

VOX Control

Explains the adjustment of the Voice Operated Exchange control for the panel mic.

INTERNAL ADJUSTMENTS AND CONNECTIONS

Call Alert Tone Level Control

Explains the control for adjusting the volume of the call alert tone.

Option Switches

Details the function of the three internal option switches for system setup.

Call Signal Jumper

Describes the jumper for configuring call signal reception on selected or either channel.

Intercom Line Connection

Details the 5-terminal connector for interfacing with the intercom line.

Program Input

Explains the 3-terminal connector for program audio input.

Option Board Jumpers

Details the function of jumper plugs for optional modules.

INSTALLATION

MAINTENANCE

BLOCK DIAGRAM FOR THE KB-702

Presents the functional block diagram for the KB-702 model.

BLOCK DIAGRAM FOR THE KB-702 GM

Presents the functional block diagram for the KB-702GM model.

TROUBLESHOOTING

TECHNICAL SPECIFICATIONS

Front Panel Connectors

Lists the connectors available on the front panel of the units.

Front Panel Controls & Indicators

Summarizes the controls and indicators found on the front panel.

Environmental

Provides the operating temperature range for the equipment.

Dimensions

Specifies the physical dimensions of the KB-702/KB-702GM units.

Weight

Lists the weight of the KB-702 and KB-702GM models.

Notice About Specifications

Notes that specifications are subject to change and are for guidance.

LIMITED WARRANTY

WARRANTY PERIOD

Details the different warranty periods for various product components.

TECHNICAL SUPPORT

Explains how to access technical support services.

WARRANTY REPAIRS AND RETURNS

Outlines the procedure for obtaining warranty repairs and returning equipment.

NON-WARRANTY REPAIRS AND RETURNS

Describes the process for non-warranty repairs and returns.

EXTENDED WARRANTY

Information on purchasing and benefits of an extended warranty.

SERVICE CONTRACT

Information on available service contracts and their benefits.

LIABILITY

States the limitations of VGC's liability regarding the product.

Clear-Com KB-702GM Specifications

General

Brand	Clear-Com
Model	KB-702GM
Category	Intercom System
Language	English

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