Page 2 - TABLE OF CONTENTS; Introduction; IMPORTANT SAFETY INSTRUCTIONS
TABLE OF CONTENTS Introduction 3 Features andBenefits 4 TVA50 PartsGuide 5 InstallationConsiderations 11 Installation 13 Trouble-Shooting 23 Specifications 24 Contents 24 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R TVA50 STEREO AMPLIFIER/AUTOMATED SWITCHER IMPORTANT SAFETY INST...
Page 4 - INTRODUCTION
3 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R INTRODUCTION A common challenge in designing whole-house audio/videodistribution systems is allowing a local source, such as audiofrom a bedroom TV, to play through the main system speakersin that room. The TVA50 is the per fect sol...
Page 5 - FEATURES AND BENEFITS
4 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 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 Connec...
Page 6 - TVA50 PARTS GUIDE
5 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 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 connecteddevice. 3. Voltage Trigger IN – 3.5mm m...
Page 7 - Figure 1
6 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R Figure 1 Figure 2 2 1 3 4 5 6 7 8 DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 6
Page 8 - Figure 3
7 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R Speaker (A) To Speaker (A) Input Right Left Whole House Receiver TV - Local Room Right/Left TV Variable Line Out TV - PowerCord To Current Sensing Outlet TVA-50 To UnswitchedOutlet Speaker(A) Out Figure 3 TV current sense with one s...
Page 9 - Figure 4
8 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R Speaker (A) Speaker (A) Out Right Left Whole House Receiver TV - Local Room Right/Left TV Variable Line Out TV - PowerCord To Current Sensing Outlet TVA-50 To UnswitchedOutlet To Speaker(A) Input Figure 4 TV current sense with two p...
Page 10 - Figure 5
9 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R Speaker (A) Speaker (A) Out Right Left Whole House Receiver TV - Local Room Right/Left TV Variable Line Out TV - PowerCord To Current Sensing Outlet TVA-50 To UnswitchedOutlet To Speaker (A) Input Figure 5 TV current sense with one ...
Page 12 - INSTALLATION CONSIDERATIONS; Location; “TECH TIP”; Wire size is expressed
11 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R INSTALLATION CONSIDERATIONS Location The TVA50 should be installed near the device to be switched,ideally within 15 feet, to avoid signal loss and degradation overlong runs of wire. Access to the speaker wires, from the whole-house...
Page 13 - Speakers
12 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R Speakers The TVA50 will remain stable when driving a 4 ohm load. If onlyo n e p a i r o f s p e a k e r s i s b e i n g d r i v e n , 4 , 6 o r 8 o h m speakers systems can be used. If switching two pairs, 8 ohmspeakers must be use...
Page 14 - INSTALLATION; Preparing for Installation; Figure 3 shows a typical application for switching one pair; Adjusting Current Sensitivity; into the current sensing outlet of the TVA50.
13 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 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 tothe other system applications for switching multiple speak-er pairs...
Page 15 - Gradually turn the sensitivity adjustment screw located on
14 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 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 clickingsound inside the unit. The Power/Active LED on the ...
Page 16 - Installation
15 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 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 deviceto be switched. An unswitc...
Page 17 - Connect Whole-House System; Maintain proper polarity. Connect the positive terminals; Connect Speakers
16 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 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 ...
Page 18 - Use a small flathead screwdriver or your thumbnail to raise; Connect Local Source; Connect the variable line level output of the TV to the RCA
17 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 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 loc...
Page 19 - The internal speakers of the TV should be switched off
NOTE: Some TVs have separate fixed (non-adjustable) and v a r i a b l e l i n e o u t s . S o m e n e e d t o b e s w i t c h e d u s i n g t h e T V ’s o n - s c r e e n m e n u . R e f e r t o t h e T V m a n u a l f o r additional information. Source Switching The TVA50 has two switching modes. C...
Page 21 - NOTE; The speaker level, when switched from the whole-house; Using In-Wall Volume Controls
20 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R NOTE : The speaker level, when switched from the whole-house system to the TV will not always be the same. If the whole-housesystem was set to CD with the volume turned up and the TV getsturned on to it’s normal listening level, th...
Page 22 - If driving speakers and using volume controls on both; 2V Trigger Out
21 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R Example 2: In-Wall Volume Control With a FixedOutput Device In some applications, it may be desirable to control speakerlevel of both the whole-house sources and the TV, or perhaps alocal CD or DVD player that might not have a vari...
Page 24 - TROUBLESHOOTING; TVA50 will not power up; Try another unswitched outlet.
23 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R TROUBLESHOOTING TVA50 will not power up Is TVA50 plugged in to an unswitchedoutlet? Is the POWER/ACTIVE LED Red? 120VAC measured from outlet withvoltmeter? Try another unswitched outlet. TVA50 will not activate (CurrentSense Mode) ...
Page 25 - SPECIFICATIONS; LINE IN: Gold plated RCA; CONTENTS; IEC three prong AC power cord
24 S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R SPECIFICATIONS Power: 50 watts per channel RMS into4/8 ohms. S/N Ratio: >94dB THD: .05% at rated power. Mounting: Horizontal or vertical mount-ing. Keyholes in back panel for verticalmount. Connectors: 1 2 V Tr i g g e r I N / O...
Page 26 - Notes
S T E R E O A M P L I F I E R / A U T O M A T E D S W I T C H E R 25 Notes DS00395ACA-TVA50.qxp 6/1/04 9:51 AM Page 25
