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LV 3620

Power Supply Amplifiers

Operator's Manual

500742-1

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Summary of Contents for LV 3620

Page 1: ...LV 3620 Power Supply Amplifiers Operator s Manual 500742 1 ...

Page 2: ... one way surface freight shipping costs within the United States Purchase must bear the expense of shipping the product between any foreign country and the port of entry in the United States and all taxes duties and other customs fees for such foreign shipments How to Obtain Warranty Service When you notify us of your need for warranty service we will give you an authorization to return the produc...

Page 3: ...rted and improper loads Front panel indicators for rapid assessment of amplifier status The amplifier installs into a standard 19 inch rack in 2U of rack space Aluminum construction for minimum weight and maximum cooling Shipped ready to operate from 120 volt ac mains at 50 60 Hz ThismanualcoversbasicoperationforAETechronamplifiermodelLV3620 Itiswritten forelectronictechniciansandengineersthatneed...

Page 4: ...terface 2 4 2 4 1 Front panel 2 4 2 4 2 Rear panel 2 5 2 5 Making connections 2 6 2 5 1 Output connection 2 6 2 5 1 Input connection 2 7 2 5 3 Bridge mono operation 2 9 2 5 4 Parallel MonoOperation 2 10 2 5 5 AC mains power requirements 2 11 Section 3 Maintenance 3 1 Periodic m aintenance 3 1 3 2 Factory service 3 2 Section 4 Principles of operation 4 1 4 1 Overview 4 1 4 2 About grounded bridge a...

Page 5: ...e the explanation of the hazard and the instructions for avoiding it DANGER represents the most severe hazard alert Extreme bodily harm or imminent death will occur if these guidelines are not followed Note the explanation of the hazard and instructions for avoiding it CAUTION indicates hazards which could result in potential personal injury or equipment or property damage Once again note the expl...

Page 6: ...uts IOC Input Output Comparator circuitry immediately alerts of any distortion exceeding 0 05 5 way binding posts for easy and versatile output connection Very low harmonic and intermodulation distortion High damping factor An articulated bi level power supply for best power matching to your load Full protection against shorted outputs open circuits mismatched loads overheating high frequency over...

Page 7: ... INVERTING INVERTING P I P BB CH 2 CH 1 GROUND LIFT Z UNBALANCED INPUT WIRING CHASSIS GROUND LIFT TIP SLEEVE GND BALANCED INPUT WIRING TIP RING SLEEVE GND I N P U T SIGNAL GROUND C H 2 IMPORTANT CLASS 1 OUTPUT WIRING REQUIRED O U T P U T BRIDGED MONO WIRING TURN AMP OFF SET STEREO MONO SWITCH TO BRIDGED MONO OUTPUT ACROSS RED TERMINALS ONLY CH 1 IS POSITIVE 1 2 3 C H 1 Dust filter Overload indicat...

Page 8: ... output of power Phase response 10 from 10 Hz to 20 kHz at 1 watt Signal to noise ratio 100 dB below rated output 20 Hz to 20 kHz IM Distortion IMD Less than 0 05 from 10 milliwatts to full rated output Damping factor Greater than 1 000 from 10 Hz to 400 Hz Slew rate Greater than 30 volts per microsecond Load impedance Rated for greater than 2 ohm usage only 1 3 2 AC power Input power requirements...

Page 9: ...e distortion As a sensitive distortion indicator it provides verification of operation 1 3 7 Protection The amplifier is protected from damage due to any of the following conditions input overload thermal overload or improper load impedance i e short circuit The amplifier remains stable under short circuit conditions If unreasonable operating conditions occur the patented ODEP circuitry limits the...

Page 10: ...front mounting surface Illustration 1 2 AETechron LV3620 dimensions PUSH TO RESET REG U S PAT OFF 4 330 809 4 611 180 4 788 452 100 VAC 7 5 A 50 60 Hz 120 VAC 7 5 A 50 60 Hz 230 VAC 7 5 A 50 60 Hz POWER 3 5 in 8 9 cm CAUTION TURN OFF AMPLIFIER BEFORE CHANGING THIS SWITCH STEREO BRIDGED MONO PARALLEL MONO CH 2 CH 1 BALANCED INPUTS NON INVERTING INVERTING P I P BB CH 2 CH 1 GROUND LIFT Z UNBALANCED ...

Page 11: ...ials so you will have them if you ever need to transport the unit Note Never ship the unit without the factory pack Contact he AE Techron factory service to order the correct shipping materials 2 2 Mounting AE Techron amplifiers are designed for standard 19 inch 48 3 cm rack mounting and stack mounting without a cabinet In a rack cabinet it is best to mount them one on top of the other to provide ...

Page 12: ...side walls of the rack should be at least 2 inches 5 cm away from the chassis as shown in Illustration 2 1 If the rack cabinet has a front door that could block air flow to the amplifier s air intakes provide adequate air flow either with a grille in the door or by pressurizing the air behind the door See Illustration 2 2 Wire grills as opposed to perforated grilles are recommended for this applic...

Page 13: ...space between the door and in front of the amplifiers pressurizing the chimney behind the door This blower should not blow air into or take air out of the space behind the amplifiers For racks without a door evacuate the rack by mountwer at the top of the rack to draw air out the back of the cabinet Option 2 in Illustration 2 2 If the air supply is unusually dusty it may be necessary to pre filter...

Page 14: ...cator flashes brightly with a 0 1 second hold delay Another IOC function is to indicate input overload If the input signal is too large the indicator will flash brightly with a 0 5 second hold delay to indicate input overload Power indicator This indicator illuminates red when the amplifier is powered on Power switch Depress this push button to turn the amplifier on or off When turned on the outpu...

Page 15: ...onnectors accept banana plugs bare wire or spade lugs Power cord Reset switches Input connectors Output jacks Illustration 2 4 Amplifier back panel PUSH TO RESET REG U S P A T OFF 4 330 809 4 611 180 4 788 452 1 0 0 V A C 7 5 A 5 0 6 0 H z 1 2 0 V A C 7 5 A 5 0 6 0 H z 2 3 0 V A C 7 5 A 5 0 6 0 H z CAUTION TURN OFF AMPLIFIER BEFORE CHANGING THIS SWITCH STEREO BRIDGED MONO PARALLEL MONO CH 2 CH 1 B...

Page 16: ...ower supply output battery or power main Use load cables with sufficient gauge thickness for the length used The resistance introduced by inadequate load cables will reduce the output power TheriskofpotentiallylethalELECTRIC SHOCKexistswhenmakingconnections Alwaysshutofftheamplifierandwaitat least10secondsbeforechangingany connections DANGER PUSH TO RESET REG U S PAT OFF 4 330 809 4 611 180 4 788 ...

Page 17: ...rential signal input is recommended wherever possible Correct input wiring will depend on two factors whether the input signals are balanced differential or unbalanced single ended whether the signal source floats or has a ground reference Other connection principles to remember Use only shielded cable Better cables have a higher density shield Spiral wrapped shield is not recommended When using u...

Page 18: ...unded line cord or other ground connection Grounded Input Source Amplifier Input Shield connected to both negative and ground input terminals Floating Input Source 2 wire line cord or battery power Amplifier Input Shield connected to ground terminal Floating Input Source 2 wire line cord or battery power Amplifier Input Illustration 2 7 Unbalanced input wiring ...

Page 19: ...Note Do not use the channel 2 input or the signal level and quality may degrade greatly The input jack for Channel 2 is not defeated in Parallel Mono mode Any signal fed into Channel 2 may distort the signal in Channel 1 Connect the load across the Channel 1 and 2 red binding posts with the positive lead from the load attaching to a red post of Channel 1 and the negative lead of the load attaching...

Page 20: ...t the load to the output of Channel 1 as shown in Illustration 2 9 The positive lead from the load connects to the red binding post of Channel 1 and the negative lead from the load connects to the black binding post of Channel 1 PUSH TO RESET REG U S PAT OFF 4 330 809 4 611 180 4 788 452 100 VAC 7 5 A 50 60 Hz 120 VAC 7 5 A 50 60 Hz 230 VAC 7 5 A 50 60 Hz CAUTION TURN OFF AMPLIFIER BEFORE CHANGING...

Page 21: ...nse as the load itself such as a slow blow fuse 2 5 5 AC mains power requirements Each AE Techron LV3620 amplifier is furnished with a three wire ac plug Use an isolated power receptacle whenever possible with adequate current North American units are shipped with a 15 amp 12 AWG line cord Other units are shipped with an appropriate line cord and plug Line voltages of 10 or more above the specifie...

Page 22: ...Installation LV3620 2 12 N o t e s ...

Page 23: ... and may cause safety hazards to the user 3 1 Periodic Maintenance The only routine maintenance that needs to be performed on the AE Techron LV3620 is to check filters at least very six months to be sure they don t become clogged with dust The filter elements can be easily removed for cleaning by gently pulling them away from the front panel Filters Illustration 3 1 Filter location OWER CH 1 OVERL...

Page 24: ... return the unit via UPS ground You must bear the expense of all taxes duties and customs fees when transporting the unit Enclose a letter explaining the nature of the problem and what service you would like Include your return shipping address and telephone number For any other arrangements please contact us AE Techron Contact Information Phone 219 295 9495 Fax 219 295 9496 e mail audioe bnin net...

Page 25: ...ailures In addition the amplifier protects loads from turn on and turn off transients The LV 3620 is also protected from internal faults Real time computer simulation is used to create an analogue of the junction temperature of the output transistors Current is limited only when the device temperature becomes excessive and just by the minimum amount necessary to keep the amplifier within a safe op...

Page 26: ... preferred and more descriptive terminology is to name an output stage in terms of whether the stage acts as a NPN or PNP stage and whether it is on the high output side of the load or low ground side of the load Positive current is delivered to the load by increasing conductance simultaneously in the high side NPN and low side PNP stage while decreasing conductance of the high side PNP and low si...

Page 27: ...emitter follower output stage The bridge balanced circuit receives a signal from the output of the amplifier and differences it with the signal at the Vcc supply The bridge balanced circuit then develops a voltage to drive the bridge balanced first output stage This results in the Vcc supply having exactly one half of the output voltage added to its quiescent voltage The protection mechanisms that...

Page 28: ... this mode of operation The ODEP circuit of Channel 2 is coupled through the Dual Mono switch to give added protection if a fault occurs in the Channel 2 output stage The ODEP circuit of Channel 2 will limit the output of both output stages by removing the drive from the Channel 1 translator stages 4 3 4 Bi Level power supply AETechron spatentedBi Levelpowersupplytechnologyiswhatmakesitpossibleto ...

Page 29: ...ratingmodeofthesupply Whenthevoltagerequirementsarehigh thesuppliesswitchtoaseriesmodewhich produceshighervoltageandlesscurrent Sensing circuitry monitors the voltage of the signal to determine when to switch Bi level modes The switching circuitry is designed to prevent switching distortion to yield the highest possible dynamic transfer function This provides the maximum power with the maximum saf...

Page 30: ...Illustration4 4LV3620blockdiagram ONLY ONE CHANNEL SHOWN ...

Page 31: ... 2 11 Input signal 2 7 Input Output Comparator IOC 1 2 2 4 M Maintenance 2 4 O ODEP 4 3 Output 1 4 2 5 2 6 Output jacks 2 5 Overload indicator 1 5 2 4 P Parallel Mono operation 4 4 Power indicator 2 4 Power supply 4 4 Power switch 2 4 Powercord 2 5 Principles of operation 4 1 Protection amplifier 1 5 4 1 protection circuitry 4 1 Protection load 2 11 R Rear panel 2 5 Reset switches 2 5 S Safety 2 2...

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