CLEAR-COM ENCORE KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS INSTRUCTION MANUAL
KB-702/KB-702GM Two-Channel Speaker Stations Instruction Manual © 2007 Vitec Group Communications All Rights Reserved Part Number 810492Z Rev. 2 Vitec Group Communications, LLC. 850 Marina Village Parkway Alameda, CA 94501 U.S.A Vitec Group Communications 7400 Beach Drive Cambridge Research Park Cambridgeshire United Kingdom CB25 9TP Vitec Group Communications Room 1806, Hua Bin Building No. 8 Yong An Dong Li Jian Guo Men Wai Ave Chao Yang District Beijing, P.R.
CONTENTS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . .
ii KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS
IMPORTANT SAFETY INSTRUCTIONS 1. 2. 3. 4. 5. 6. 7. Please read and follow these instructions before operating this product. 8. 9. 10. 11. 12. 13. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol alerts you to the presence of uninsulated dangerous voltage within the product's enclosure that might be of sufficient magnitude to constitute a risk of electric shock. Do not open the product's case. This symbol informs you that important operating and maintenance instructions are included in the literature accompanying this product.
1 OPERATION INTRODUCTION Congratulations and thank you for choosing this Clear-Com product. The KB-702 and KB-702GM two-channel speaker stations are powerful, user-friendly units that can serve as versatile intercom stations. Please read this manual completely to better understand the functions of these products. For questions not addressed in this manual, contact the dealer or Clear-Com directly. Clear-Com applications support and service people are ready to help.
The optional EB7-TW daughter board module can be installed to provide an interface to two intercom channels on a single microphone cable. Also, the EB7-4W four-wire daughter board module is available to allow long-distance connections using separate pairs of wire for send audio and receive audio. The EB7-4W four-wire option supports two-channel operation. The KB-702 and KB-702GM are compatible with all Clear-Com party-line intercoms.
11 12 8 9 2 Microphone 4 3 Channel Select VOX A B Volume Panel Mic Headset Call Headset Program Level Sidetone Speaker Off On Talk 2-Channel Speaker Station KB-702GM 10 5 1 7 6 Figure 1-2: KB-702GM Front Panel 1. Talk Button and Indicator: The talk button activates the microphone feed to the selected intercom channel. It has a dual action (momentary or latching) depending upon how the button is pressed.
plays through both the speaker and headset if the speaker on/off switch is turned on. 4. Volume Control: Turn this control to set the volume required on the speaker or headset. This control does not affect the tone alert level or the program input level. 5. Sidetone Control: Sidetone is the level of your own voice that you hear while talking on the intercom.
Mic Type --- Dynamic; see technical specifications for details Headphone --- Dynamic; see technical specifications for details The wiring of the headset is to be as follows: Pin 1 --- Mic common Pin 2 --- Mic hot Pin 3 --- Headphone common Pin 4 --- Headphone hot The mic and headphone wiring in the headset cord must be individually shielded. Do not connect pins #1 and #3 together. Headset extension cords or headset “Y” cables are not recommended because they will increase crosstalk between channels. 11.
18 17 P3 Must be installed if no option P2 Must be installed if no option P1 Call on Both 15 P1 Call on Selected 16 View from top of KB-702 1 2 3 Front Panel 13 14 Figure 1-3: Internal Adjustments and Connections 13. Call Alert Tone Level Control: This control adjusts the volume of the call alert tone sound. This is normally adjusted when the system is set up and there should be no need to adjust it in normal operation. This feature can be disabled by turning the control fully counterclockwise.
Option modules are installed, this jumper is not used. In TW operation, the call signal always originates on channel A. In 4-Wire operation, the call signal is not used. 16. Intercom Line Connection: The KB-702 contains a 5-terminal plug-on connector for intercom line connection. This connector is intended to be unplugged from the circuit board when connecting the intercom line, and then plugged back on when the wiring is completed.
speaker or headset is controlled by the program level control. The program input accepts a balanced or unbalanced line-level audio signal. If this input is connected to the stage announce (SA) output of a main station it can be used as a paging input. Since the level of this input is independently adjustable from the intercom audio volume, it can be used to override the intercom audio.
2 INSTALLATION 1. Unpack the unit and inspect for any damage that may have occurred in shipping. 2. Set the option switches to the default (up) position. 3. Connect the intercom lines. If only one intercom line is to be connected, turn option switch #1 to the on or closed position. 4. Install the KB-702 into the four-gang outlet box or V-box. (For additional information, refer to the Clear-Com System Installation Manual.) 5. Set listen levels and sidetones.
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3 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-702GM Headset Mic EQ/ LIM Sidetone Null Intercom Volume Mic Select SpeakerSpeaker On/Off Speaker Dip Panel Mic Mic Dip / Mute Long Line Headset Output VOX Talk/ VOX Talk Program Mute Red / Green Call Alert Program Tone Level Level Microprocessor Call Latch Disable Call Light Call Send & Receive Power RMK Balanced Program Input Channel Switch TW Option Single Chan. Common +30 VDC Ch. B Ch. A Ground Ch. B 4-Wire Input 16 VAC Rectifier Power Ch.
TROUBLESHOOTING SYMPTOM System does not operate. Talk button does not light. CAUSE SOLUTION No 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 connections and cable. The KB-702 has an internal failure. Unit requires servicing. Speaker switch turned off, volume knob turned all the way down, or channel switch set to unused channel. Adjust controls appropriately. Speaker plug or wiring has come loose.
SYMPTOM CAUSE SOLUTION Will not trip with voice. Sensitivity set too low. Turn VOX sensitivity control in a clockwise direction. Note: VOX is intended for close-in operation. Excessive crosstalk Program signal sounds distorted. Call signal does not function. 3-4 High DC resistance has a ground return. Use heavier cable; add additional conductor(s) to ground return. If the cable run is exceptionally long, consider adding and using the EB7-4W four-wire option module.
4 TECHNICAL SPECIFICATIONS KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS dBu is an absolute measurement. 0 dBu is referenced to 0.
Frequency Response Panel Mic - Party Line (KB-702GM only) Headset Mic - Party Line Program Input - Headset Out Program Input - Speaker Out Party Line - Headset Out Party Line - Speaker Out Max Distortion Panel Mic - Party Line (KB-702GM only) Headset Mic - Party Line Program Input - Headset Out Program Input - Speaker Out Party Line - Headset Out Party Line - Speaker Out Noise Panel Mic - Party Line (KB-702GM only) Headset Mic - Party Line Program Input - Headset Out Program Input - Speaker Out Party L
Front Panel Connectors Panel Mic: (KB-702GM only) Headset: Front Panel Controls & Indicators (KB-702GM) Front Panel Controls & Indicators (KB-702) Environmental Dimensions (KB-702/KB-702GM) Weight KB-702 KB-702GM (1) 1/4 in. (0.
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LIMITED WARRANTY Vitec Group Communications (VGC) warrants that at the time of purchase, the equipment supplied complies with any specification in the order confirmation when used under normal conditions, and is free from defects in workmanship and materials during the warranty period. VGC offers 24 x 7 customer support if you have an Extended Warranty or Service Contract. Return Material Authorization (RMA) numbers are required for all returns. Both warranty and non-warranty repairs are available.
such agreement. For more information, contact your authorized dealer, distributor, or sales representative. Instructions for reaching VGC’s User Support Centers are given below. Telephone for Europe, Middle East and Africa: +49 40 6688 4040 Telephone for the Americas and Asia: +1 510 337 6600 Email: vitec.support@AVC.de Once the standard warranty period has expired, the User Support Center will continue to provide telephone support if you have purchased an Extended Warranty or Service Contract.
years the warranty of any product offered with a standard two-year warranty. The total warranty period will not extend beyond five years. Any purchase of an extended warranty provides 24 x 7 customer support in addition to the warranty immediately upon purchase of the warranty extension. Note: VGC does not offer warranty extensions on UHF wireless intercom systems, or on any product with a 1-year or 90-day warranty.
of customer furnished components resulting in damage to VGC provided product. This limited warranty is not transferable and cannot be enforced by anyone other than the original consumer purchaser. This warranty gives you specific legal rights and you may have other rights which vary from country to country.
