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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 28
INSTALLATION & OPER ATION GUIDE
TVA50
TVA50
STEREO AMPLIFIER/ AUTOMATED SWITCHER
®
B LENDING H IGH F IDELITY AND A RCHITECTURE
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 1 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER TV A50 IMPORTANT SAFETY INSTRUCTIONS STEREO AMPLIFIER/ 1. Read these instructions. AUTOMATED SWITCHER 2. Keep these instructions. TABLE OF CONTENTS 3. Heed all warnings. Introduction 3 4. Follow all instructions. Features and 5. Do not use this apparatus near water. Benefits 4 6. Clean only with dry cloth. TVA50 Parts 7. Do not block any ventilation openings. Install in accor- Guide 5 danc
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 2 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER 11. Only use attachments/accessories specified by the manu- facture. 12. Unplug this apparatus during lightning storm or when unused for long periods of time. 13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the appar
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 3 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER INTRODUCTION A common challenge in designing whole-house audio/video distribution systems is allowing a local source, such as audio from a bedroom TV, to play through the main system speakers in that room. The TVA50 is the perfect solution. When activated, by either current sensing or a voltage trigger the TVA50 interrupts the main system’s speaker level signal, and switches to the local source. When th
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 4 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER FEATURES AND BENEFITS • Compact Size - Allows installation on cabinet shelves, side walls or back panels. • RCA Line In Jacks - Two gold plated RCA jacks for line level audio input from local device. • 4 Pin Screwless Speaker Connectors • Efficient Digital Technology - TVA50 incorporates digital amplifier technology to deliver high output from a small footprint. • Current Sense - The current sensing circ
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 5 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER TVA50 PARTS GUIDE 1. AC IN – Removable three-prong IEC compatible power cord. 2. Current Sensing AC Outlet – TVA50 will activate and switch inputs when it senses a current draw from a connected device. 3. Voltage Trigger IN – 3.5mm mini-phone jack. TVA50 will acti- vate and switch inputs when 3-30 volts AC or DC is present. 4. 12V Trigger OUT – 3.5mm mini-phone jack. 12VDC 200mA control output for auto
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 6 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER 1 2 Figure 1 3 4 5 6 7 8 Figure 2 6
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 7 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER To Current Sensing Outlet TV - Power To Unswitched Cord Outlet TVA-50 Right/Left TV Variable Line Out To Speaker Speaker (A) Input TV - Local Room (A) Out Right Left Right Left Speaker (A) Whole House Receiver Figure 3 TV current sense with one speaker pair 7
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 8 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER To Current Sensing Outlet TV - Power To Unswitched Cord Outlet TVA-50 Right/Left TV Variable Line Out Speaker (B) Out TV - Local Room Left Right Speaker (A) Out Left Right Right Left To Speaker (A) Input Speaker (B) Right Left Speaker (A) Whole House Receiver To Speaker (B) Input Figure 4 TV current sense with two pair of 8 ohm speakers 8
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 9 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER TV - Power Cord To Current Sensing Outlet To Unswitched Outlet 12VDC Trigger TVA-50 out to TV lift 12VDC Niles IR Right/Left Flasher TV Variable Line Out Speaker (A) Out To Speaker (A) Input TV - Local Room Right Left Right Left Niles MSU480 Speaker (A) Whole House Receiver IR Remote Figure 5 TV current sense with one speaker pair and a TV lift 9
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 10 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER 5-7/16" 4-15/16" Figure 6: Bottom of the unit with measurements for wall mounting 10
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 11 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER INSTALLATION CONSIDERATIONS “TECH TIP” Location The TVA50 should be installed near the device to be switched, ideally within 15 feet, to avoid signal loss and degradation over long runs of wire. Access to the speaker wires, from the whole- house system and to the local speakers, is also necessary. Installation on a cabinet shelf, sidewall or back panel are all acceptable. Wire size is expressed Type o
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 12 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER Speakers The TVA50 will remain stable when driving a 4 ohm load. If only one pair of speakers is being driven, 4, 6 or 8 ohm speakers systems can be used. If switching two pairs, 8 ohm speakers must be used. Fixed/Variable Line Level Outputs To control the TV volume through the speakers, the variable output on the TV must be connected to the TVA50 Line IN. Using Volume Controls Depending on your insta
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 13 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER INSTALLATION Preparing for Installation 1. Figure 3 shows a typical application for switching one pair of speakers to a local source using current sensing. Refer to the other system applications for switching multiple speak- er pairs, and use of the Trigger IN/OUT. If your application is different from those diagrams, use appropriate system design software or draw it out on paper. Make note of all parts
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 14 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER 3. Gradually turn the sensitivity adjustment screw located on the bottom of the TVA50 (Figure 6) until you hear the inter- nal relay of TVA50 switch. This is indicated by a clicking sound inside the unit. The Power/Active LED on the front panel of the TVA50 (Figure 7) provides a visual indication of the local switching. When the TVA50 switches to the local input the Power/Active LED will change from red
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 15 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER Installation Caution: Turn the power OFF to all components in the system to prevent accidental shorting or electrical shock. Mounting the TVA50 When possible, the TVA50 should be installed near the device to be switched. An unswitched 120VAC outlet is required to power the TVA50. (Unit should remain unplugged during installation.) Care should be taken to provide adequate space for access and connections
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 16 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER Connect Whole-House System 1. Locate the 4 pin speaker connector plug for SPEAKER A IN (and remove if plugged in). 2. Strip 1/4" of insulation from the end of each wire for SPEAKER A IN, coming from the speaker level output of the whole-house system amplifier. Tightly twist the end of each wire until no frayed ends remain. 3. Use a small flathead screwdriver or your thumbnail to raise the locking tabs,
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 17 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER 3. Use a small flathead screwdriver or your thumbnail to raise the locking tabs, exposing the holes on the removable con- nector plug. 4. Insert each wire into the appropriate hole on the remov- able connector plug, and snap the locking tab down. NOTE 1: If switching two speaker pairs, repeat steps 1-4 above for SPEAKER B OUT. When switching two pairs, 8 ohm speakers must be used. Connect Local Source A
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 18 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER NOTE: Some TVs have separate fixed (non-adjustable) and variable line outs. Some need to be switched using the TV’s on-screen menu. Refer to the TV manual for additional information. Source Switching The TVA50 has two switching modes. Current Sensing and AC or DC voltage trigger. In current sense mode, the TV power cord gets plugged into the Current Sensing AC outlet on the TVA50. When the TV is turn
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DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 19 S TERE O A MPLIFIER / A UT O MA TED S WIT CHER BEFORE PROCEEDING SET THE VOLUME CONTROL ON THE TVA50 TO THE MINIMUM POSITION (FULLY COUNTERCLOCKWISE). 1. Play a source (CD, Tuner) on the whole-house system. Set the volume to a normal listening level. 2. Turn the TV on. The TVA50 will sense the TV power, activate and switch to the local source (TV). 3. Using the remote control for the TV or the volume control on the TV, turn the volume on the TV al
