Devices, Inc. - Film-Tech
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1. Credit is issued to the dealers account The credit may be used against future purchases and no cash transactions are offered All returns must be shipped freight prepaid by the dealer Equipment returned without a factory RA Return Authorization will be refused Installation and Service Manual TA250 450 Power Amplifier Circuit Description To assure absolute long term reliability the output sec tion of each channel incorporates multiple Motorola Power Transistors which provide 3 times the amplifi ers rated power in watts of dissipation per channel The output stage is arranged in a full complimentary format for class AB 2 operation The bias current is evenly distributed among all output devices Bias thermal compensation is accomplished by a thermally bipolar semiconductor junction to the heat producing output device Triple diffused high power driver transistors are employed along with high speed high voltage silicon annular devices for the predriver and inverter stages Utilization of these com ponents provides the required separation of Ft break points for absolute stability Full complimentary drive and loading is employed throughout Only 20 dB of negative feedback is used to reduce forward transfer distortion to minimum levels V1 type energy limiters are incorporated for short circuit protection of the am plifier Due to the unusually large safe operating area of the output stage the limiters do not activate until dr2. single high power mono output See Bridged Mono Operation Pg 9 OUTPUT CONNECTIONS Output connections are made via five way binding posts Polarity is indicated by red and black terminals We suggest the use of dual banana plugs for convenient and reliable hook up They also allow quick connec tion changes when reversing polarity as required dur ing test and calibration of multilevel biamplified and triamplified systems Heavy Class 11 wire may be used by unscrewing the large plastic portion of the output terminal and inserting the wire into the hole provided EXTREMELY IMPORTANT When making wire connections Double Check that NO wire strands or ends touch an adjacent terminal short ing the output CAUTIONS Never strap the two red output terminals together in parallel Never connect either red output terminal to chassis ground FUSE HOLDER The Fuse Holder contains the Primary AC Fuse The fuse should only be replaced with one of the same type If the fuse continues to blow out stop replacing the fuse and refer servicing to qualified personnel TA250 450 Power Amplifier AC POWER CORD Plug the Power Cord into an AC outlet that delivers the proper voltage and current for amplifier operation CAUTION The TA250 and TA450 amplifiers are a product of the most advanced technology and manufacturing tech niques The amplifiers are fully protected against over heating input overload and shorted or mismatched lo
3. FILM TECH THE INFORMATION CONTAINED IN THIS ADOBE ACROBAT PDF FILE IS PROVIDED AT YOUR OWN RISK AND GOOD JUDGMENT THESE MANUALS ARE DESIGNED TO FACILITATE THE EXCHANGE OF INFORMATION RELATED TO CINEMA PROJECTION AND FILM HANDLING WITH NO WARRANTIES NOR OBLIGATIONS FROM THE AUTHORS FOR QUALIFIED FIELD SERVICE ENGINEERS IF YOU ARE NOT A QUALIFIED TECHNICIAN PLEASE MAKE NO ADJUSTMENTS TO ANYTHING YOU MAY READ ABOUT IN THESE ADOBE MANUAL DOWNLOADS WWW FILM TECH COM Devices Inc TA250 TA450 DUAL CHANNEL AMPLIFIERS INSTALLATION AND O PERATION MANUAL Copyright 1995 by SMART Devices Inc 5945 Peachtree Corners East Norcross GA 30071 1337 1 800 45 SMART or 770 449 6698 Copyright 1995 by SMART Devices Inc 5945 Peachtree Corners East Norcross GA 30071 1337 Table of Contents Circuit Description 3 Construction 3 Installation 3 Power Connections 3 Thermal Protection 3 Fan Assist Cooling 4 Controls Connections 4 BRIDGED MONO OPERATION 5 SPECIFICATIONS 5 SMART products are designed to deliver unsurpassed quality in workmanship and performance The fol lowing information gives detailed instructions on the installation and operation of the SMART TATA250 450 amplifier We strongly encourage new owners of the TATA250 450 to thoroughly read this entire manual before placing their new SMART product into service This will ensure that the TATA250 450 will be oper ated properly to give th
4. TA450 425 watts per Ch 4 ohms TA450 290 watts per Ch 2 ohms TA450 765 watts bridged mono 8 ohms TA450 600 watts bridged mono 4 ohms TA450 Frequency Response Plus Minus 0 5 dB 20 Hz to 20 KHz Distortion lt 0 25 THD or IM 01W to rated power 20 Hz to 20 KHz 0 01 typical Input Sensitivity 1 0 Vrms standard with 0 775 Vrms and 1 5 Vrms inter nally selectable Hum and Noise 104 dB below rated output unweighed 20 KHz band width Input Impedance 15K ohms nominal Transient Inter Modulation Distortion lt 0 02
5. ads As is the case with any precision instrument some care should be taken in the unit s operation The following precautions should be noted and adhered to Damage resulting from their omission is not covered under the terms of the warranty 1 DO NOT PARALLEL THE TWO OUTPUTS OF EACH CHANNEL BY CONNECTING THEM TO GETHER OR PARALLEL THEM WITH ANY OTHER AMPLIFIER OUTPUT 2 NEVER CHANGE A FUSE WITH AC POWER CON NECTED 3 UNDER NO CIRCUMSTANCES SHOULD THE AM PLIFIER BE OPERATED WITH THE COVER RE MOVED THERE ARE NO USER SERVICEABLE COM PONENTS INSIDE THE AMPLIFIER AVOID POTEN TIALLY DANGEROUS SHOCK HAZARDS REMEM BER TO KEEP THE COVER CLOSED AT ALL TIMES BRIDGED MONO OPERATION 1 Set the INPUT SELECTOR SWITCH to BRIDGE 2 Connect the input signal to Channel One s input jack 3 Connect the speaker load to the two red terminals of each channel Confirm the terminal of the speaker to channel one and the terminal to channel two 4 DO NOT use the black terminals of either channel 5 Assure the speaker impedance is 4 ohms or above 6 Adjust output using Channel One control and Set Channel Two level to 0 SPECIFICATIONS Gain 26 dB per Channel TA250 28 dB per Channel TA450 Continuous Power 145 watts per Ch 8 ohms TA250 240 watts per Ch 4 ohms TA250 200 watts per Ch 2 ohms TA250 400 watts bridged mono 8 ohms TA250 300 watts bridged mono 4 ohms TA250 270 watts per Ch 8 ohms
6. clip circuit is activated attenuating the input signal and preventing a Hard Clip condition where the amplifier s output saturates to a DC level 1 4 JACK INPUT CONNECTIONS Balanced and Unbalanced inputs can be accepted via the 1 4 Jack Balanced inputs Tip High Ring low Sleeve Ground Unbalanced inputs Tip High Sleeve Ground Note The Unbalanced 1 4 Jack parallels the XLR connector for easy daisy chaining of amplifier inputs XLR INPUT CONNECTIONS XLR input connectors are provided for balanced input signals Please note Pin 1 Ground Pin 2 High Pin 3 Low INSTALLATION amp OPERA GROUNDILIFT SWITCH To eliminate ground loops between this amplifier and a preamplifier in certain installations a GROUND LIFT SWITCH is provided INPUT SIGNAL SELECTOR SWITCH This switch is used to select one of three input configu rations 1 PARALLEL The input signal is applied to Channel One only Channel One and Two inputs are connected in parallel and the same signal at both Channel One and Channel Two outputs NOTE Channel Two s input becomes a signal output for use in Daisy Chaining additional amplifiers 2 STEREO This is the amplifiers standard mode of op eration where channel inputs and outputs corresponds Chan 1 in Chan 1 out and Chan 2 in Chan 2 out 3 BRIDGED This mode is used to obtain the highest power output levels possible from the amplifier Both Channels combine to form a
7. e superior performance that it was designed to deliver For service or installation assistance please call our Technical Support Department between the hours of 8 a m 5 p m E S T Mon Fri 1 800 45 SMART LIMITED WARRANTY SMART products and accessories are warranted against malfunction or failure due to defects in workmanship or materials for a period of one year from the date of shipment If a problem occurs during the warranty pe riod the unit will be repaired or replaced at our option without charge for materials or labor If air freight is requested by the dealer the difference between air and surface charges will be billed to the dealer This limited warranty does not cover products that have been abused altered modified or operated in other than specified conditions Prior factory approval is required on all returns Returned equipment or defective parts must be shipped freight prepaid to us by the dealer or cus tomer Our limited warranty does not cover damages resulting from accident misuse or abuse lack of responsible care or fail ures not attributable to manufacturing defects except as provided herein SMART Devices Inc makes no warranties ex press or implied including warranties of merchantability or fitness for a particular purpose RETURN POLICY Factory authorization MUST be obtained before returning any product A 15 restocking charge will be issued on unused equipment in original box that is returned for credit
8. iving a forty five degree reactive load under 2 ohms at full power Construction The amplifiers are designed on an all modular concept permitting rigorous preassembly module testing and maximum service accessibility Each functional mod ule is fully tested before final assembly Although com ponents of the highest quality are used throughout each amplifier is burned in prior to shipment at the worst case operating point to eliminate any possibility of component malfunction All chassis components are precision machined from high quality aluminum and sheet steel stock The entire package concept is directed toward maximum efficiency of space and structure ac counting for the unit s compact size and light weight Installation All SMART amplifiers are designed for mounting in a standard 19 inch equipment rack or one of the many rack type portable cases available on the market The amplifiers require 3 1 2 inches of vertical panel space with 13 1 2 inches required behind the panel Total 3 depth Including handles is 14 3 4 inches Front pan els are machined from solid aluminum stock with a black textured finish and sturdy rack mount handles Placement of the amplifier is not critical for normal op erating conditions provided that sufficient air flow is allowed to reach the heat sink array If the unit is to be placed on a shelf or a similar unenclosed area allow four inches clearance behind the heat sink to permit ver
9. operation into low imped ance loads can result in an increase in output device case temperature sufficient to affect any amplifiers per formance Should the heat sink reach 95C thermal protection cir cuitry will automatically disconnect the amplifier s out put stage from the load loudspeaker until the tempera ture decreases sufficiently The action of removing the load eliminates output current resulting in an immedi ate temperature drop The thermal protection circuit will automatically reconnect the load when the tem perature drops below 95C Fan Assist Cooling To provide continuous operation under adverse operat ing conditions a Dual Fan Forced Air Cooling System has been added for extra protection Temperature is controlled automatically by a thermal switch which turns on the Cooling System when re quired Controls Connections POWER SWITCH To turn the amplifier ON or OFF press the upper or lower portion of this rocker switch POWER INDICATING LED This LED indicates power is turned ON LEVEL CONTROLS Each channel has a separate low noise 41 click detent rotary level control Rotate controls clockwise to in crease level SIGNAL STATUS INDICATORS Two green LED indicators are normally off with no sig nal present and illuminate when signal is present CLIP INDICATORS Two red LED indicators illuminate when the amplifier has reached full power If the amplifier is driven into a clip condition a Soft
10. tical air flow through the array For installation in a cabinet allow an additional two inches above and one inch below the amplifier to permit air to be drawn around the back of the unit If the amplifier is to be mounted in an equipment rack or cabinet with other heat producing equipment ensure environmental oper ating temperatures do not exceed 55C 131F Should overheating occur because of inadequate ventilation thermal protection circuitry will automatically protect the amplifier When a safe operating temperature is re stored the amplifier will resume normal operation Because the amplifiers are capable of delivering high power from a relatively small physical package consid erable heat can build up in cabinets containing several instruments A good rule of thumb to adopt is Pro vide forced air cooling in any enclosure containing four or more instruments Power Connections SMART power amplifiers are specified for operation from 120 240 Volt 50 60 Hz mains supply Equipment for domestic USA consumption includes a captive cord with a three pin polarized plug DO NOT REMOVE THE CENTER GROUNDING PIN In new installations and portable sound systems or any situa tion in which the mains power is suspect it is wise to confirm appropriate voltage and line polarity BEFORE connecting the instrument to power sources Thermal Protection Certain conditions of operation restricted airflow cool ing sustained high power
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