ElectroVoice-Eliminator-pwr-sm维修电路原理图.pdf

SERVICE MANUALDownloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库Table of Contents- Safety and Service Instructions- - Warranty- - Technical specifications- - Measuring data- - Bill of materials- - Spare parts plan- - Circuit diagramsElectro-Voice600 Cecil Street,Buchanan,Michigan 49107Phone 616/695-6831Fax 616/695-1304e-mail Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库The lightning flash with arrowhead symbol, within an equi-lateral triangle is intended to alert the user to the presenceof uninsulated “dangerous voltage” within the productsenclosure that may be of sufficient magnitude to constitutea risk of electric shock to persons.The exclamation point within an equilateral triangle isintended to alert the user to the presence of importantoperating and maintance (servicing) instructions in theliterature accompanying the appliance.IMPORTANT SAFETY INSTRUCTIONS1. Read these instructions.2. Keep these instructions. 3. Heed all warnings.4.Follow all instructions.5. Do not use this apparatus near water.6.Clean only with a damp cloth.7. Do not block any of the ventilation openings. Install in accordance with the manufactures instructions.8.Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.9.Only use attachments/accessories specified by the manufacturer.10. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has beendamaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have falleninto the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.For US and CANADA only:Do not defeat the safety purpose of the grounding-type plug. A grounding type plug has two blades and a third grounding prong.The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult anelectrican for replacement of the absolete outlet.1. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and the CSA E65 - 94 have to be obeyed when servicing the appliance.2. Use of a mains separator transformer is mandatory during maintenance while the appliance is opened, needs to be operated and is connected to the mains3. Switch off the power before retrofitting any extensions, changing the mains voltage or the output voltage.4. The minimum distance between parts carrying mains voltage and any accessible metal piece (metal enclosure),respectively between the mains poles has to be 3 mm and needs to be minded at all times.The minimum distance between parts carrying mains voltage and any switches or breakers that are not connected to the mains (secondary parts) has to be 6 mm and needs to be minded at all times.5. Replacing special components that are marked in the circuit diagram using the security symbol (Note) is only permissiblewhen using original parts.6. Altering the circuitry without prior consent or advice is not legitimate.7. Any work security regulations that are applicable at the location where the appliance is being serviced have to be strictlyobeyed. This applies also to any regulations about the work place itself.8. All instructions concerning the handling of MOS - circuits have to be observed.Note: SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY)IMPORTANT SERVICE INSTRUCTIONSCAUTION: These servicing instructions are for use by qualified personnel only. To reduce therisk of electric shock, do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel.1-2Downloaded from www.M manuals search engine WARRANTY (Limited)Electro-Voice products are guaranteed against malfunction due to defects in materials or workmanship for a specifiedperiod, as noted in the individual product-line statement(s) below, or in the individual product data sheet or ownersmanual, beginning with the date of original purchase. If such malfunction occurs during the specified period, theproduct will be repaired or replaced (at our option) without charge. The product will be returned to the customerprepaid.Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or appearance; (b) certainspecific items described in the individual product-line statement(s) below, or in the individual product data sheet orowners manual; (c) Malfunction resulting from use or operation of the product other than as specified in the productdata sheet or owners manual; (d): malfunction resulting from misuse or abuse of the product; or (e): malfunctionoccurring at any time after repairs have been made to the product by anyone other than Electro-Voice or any of itsauthorized service representatives.Obtaining Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, toElectro-Voice or any of its authorized service representatives together with proof of purchase of the product in theform of a bill of sale or receipted invoice. A list of authorized service representatives is available from Electro-Voiceat 600 Cecil Street, Buchanan, MI 49107 (616-695-6831) and/or Electro-Voice West at 9130 Glenoaks Boulevard,Sun Valley, CA 91532 (213-875-1900).Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer arethe only remedies provided to the customer. Electro-Voice shall not be liable for any incidental or consequentialdamages including, without limitation, injury to persons or property or loss of use. Some states do not allow theexclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply toyou. Other Rights: This warranty gives you specific legal rights, and you may have other rights which vary from stateto state.Electro-Voice Electronics are guaranteed against malfunction due to defects in materials or workmanship for aperiod of three (3) years from the date of original purchase. Additional details are included in the Uniform LimitedWarranty Statement.Specifications subject to change without notice.600 Cecil Street, Buchanan, Michigan 49107, Phone 616/695-6831, Fax: 616/695-1304 TELEX/EVI Audio Canada, 705 Progress Ave. Unit 46 Toronto, Onatario, M1H 2x1, Canada , Phone: 800/881-1685, Fax: 877/522-2242TELEX Communications A.G., Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: 011-41/32-51-6833, Fax: 011-41/32-51-1221EVI Audio Deutschland GmbH, Hirschberger Ring 45, D-94315, Straubing, Germany, Phone: 011-49/9421-7060, Fax: 011-49/9421-706265EVI Audio France S.A., Parc de Courcerin-Allee Lech Walesa, Lognes, f-77185 Marne La Vallee, France, Phone: 011-33/1-6480-0090, Fax: 011-33/1-6006-5103EVI Audio Japan Ltd., 2-5-60 Izumi, Suginami-ku, Tokyo, Japan 168, Phone: 011-81/3-3325-7900, Fax: 011-81/3-3325-7789EVI Audio (Aust.) Pty., Unit 24, Block C, Slough Business Park, Slough Ave., Silverwater, N.S.W 2141, Australia, Phone 011-61/2-648-3455, Fax: 011-61/2-648-5585EVI Audio (Hong Kong) Limited, Unit E & F, 21 /F., Luk Hop Industrial Bldg., 8 Luk Hop St., San Po Kong, Kowloon, Hong Kong, Phone: 011-852/351-3628, Fax: 011 -852/351-3329Downloaded from www.M manuals search engine Technical Specifications: S1200, S900, Q44, Q66, Force, Eliminator, Altec Lansing 8140 & 8160Amplifier at rated conditions, both channels driven with 8 loads, unless otherwise specified.S900 / Q44 /Altec Lansing 8140 /ForceS1200 / Q66 /Altec Lansing 8160 /EliminatorLoad Impedance842842Maximum Midband Output PowerTHD = 1%, 1kHz280W450W650W380W600W850WRated Output PowerTHD 0.2%, 20Hz . 20kHz230W350W450W300W500W650WMax. Single Channel Output PowerDynamic-Headroom, IHF-A340W640W720W460W880W950WMaximum Bridged Output PowerTHD = 1%, 1kHz900W1300W-120W1700W-Maximum RMS Voltage SwingTHD = 1%, 1kHz56V64VVoltage Gainat 1kHz34dB35dBSlew Rateat 1kHz25V/s30V/sPower Consumptionat 1/8 maximum output power 4690W870WInput Sensitivityat rated output power 4, 1kHz0dBu (775mV)THD at rated output power,MBW = 80kHz, 1kHz 0.05%IMD-SMPTE60Hz, 7kHz 0.08%DIM303.15kHz, 15kHz 0.03%Crosstalkref. 1kHz, at rated output power 300 / 200Signal to Noise RatioA-weighted103dBPower Requirements240V, 230V or 120 V, 50Hz . 60HzProtectionAudio limiters, High temperature, DC, HF, Back-EMF,Peak current limiters, Inrush current limiters, Turn-ondelayCoolingFront-to-rear, 3-stage-fansSafety ClassIDimensions(W x H x D), mm483 x 132.5 x 385.5Weight15kg16kgDownloaded from www.M manuals search engine 1MEASUREMENT SPECIFICATIONS: Force & Eliminator power amplifiersprinted board assembly names and their corresponding EDP-No.:Force: 84177Eliminator : 84178printed board assemblyindexMain PCB1Supply PCB4Input PCB2LED PCB3measuring condition; if not otherwise specified:- tolerance of measured values:X = 1.5 dB- measuring frequency:f = 1 kHz- stated levels refer to:U = 775 mV (0 dBu)- level controls set to their clockwise limits- pin assignment of the XLR-type connectors:PIN 1: ground / shieldingPIN 2: + INPUTPIN 3: - INPUT- source resistance for the induction via the XLR-type connector:R(Q) = 50 - the AMPLIFIER PCB printed board assembly is provided with service connectorsCNS1CNS2CNRCPINassignmentPINassignmentPINassignment1-Vcc1LIM A Switch1LIM Out A2BIAS +A2-15V2LIM Out B3BIAS -A3LIM B Switch3Standby via RC4FAN Voltage4+15V4Standby LED5+Vcc5AGND5-Vss6BIAS +B6Speaker Out A6+Vss7BIAS -B7Relais/Protect7n.c.8Temp Heatsink8Speaker Out B8n.c.1.Operation voltage:U(B) = 120 V, 50 Hz 60 Hz2.Deviation limit of the operation voltage:-30 % +10 %3. Power consumption (both channels driven) f = 1 kHzForceEliminatoridling power consumption30-60W40-80Wnominal power consumption (RL=4)1400W1900Wstandard power consumption (RL=4)430W600Wmaximum power consumption (RL=4)1650W2100Wpower consumption at 1/8 of the maximum output power690W870W4. Adjustments4.1 IDLING CURRENT ADJUSTMENTConnect the DC-volt meter at the BIAS measuring points (see service connector) and adjust the idling currentvia the trim potentiometer VR101/VR301 (on the main PCB printed board assembly). Adjust both channels ofthe power amplifier A&B to a value of U(DC) = 7.5 mV. Adjusting the idling current setting has to beDownloaded from www.M manuals search engine 2performed at normal room temperature. In case the power amplifier had been operated before, it has to be givenseveral hours for cooling off.4.2 VCA - OFFSETPeriodically (rhythmical) opening and short-circuiting the CNS2.1 and CNS2.2 on the main PCB printed boardassembly for channel A; respectively CNS2.3 and CNS2.2 for channel B. Using VR100 respectively VR300 toadjust the power amplifier outputs to their minimum offset (with oscilloscope to minimal peak value or to theaudible minimal volume setting).5. Testing of functions5.1 OUTPUT - offset voltageDC-voltage measuring at the SPEAKER A/B outputs with U(DC) 10 mV.5.2 LIMITER5.2.1 damping testChannels separately driven with a 1 kHz signal up to U(A) = 49 volts, respectively U(A) = 42.2 volts (withoutload). Increase the input voltage by 10 dB. The LIMITER LED lights and the output voltage increases by about2 dB to approx. 64 volts, respectively 56 volts; with slight clipping. The distortion rate of the limited signal isat THD = 1.0 1.5 %. Increasing the input signal up to a value of +20 dBu should not result in remarkablyhigher clipping.5.2.2 attack and release timesperform the test of both power amplifier channels separately: testing without load resistors1.)Drive the power amplifier input with a burst signal (f = 1 kHz, 10 cycles, rate: 0.5 sec.) and U(E) = +10dBu.2.)Use an oscilloscope to monitor the output signal. After 3 - 4 signal periods, the limiter controlled themajor distortion down to a minor residual distortion (THD = 1.0 1.5 %).attack time: 3 - 4 msrelease time: 30 - 40 ms5.3 POWER-ON DELAYSignal present at the power amplifier input. Use the power-on switch to switch the power amplifiers power on.Approximately 2 seconds after switching the power on, the signal is present at the amplifiers output.5.4 FAN CONTROLUpon powering-on the power amplifier, the fans will run for about 2 seconds and then stop; presuming that theamplifiers temperature is not too high. In idling condition (power-on, no signal present) the fans are switchedbetween the SLOW and OFF (0 V) mode, depending on the temperature of the heat sink. When CNS1.8 isconnected via a 51 kohms resistor with +15 V, the fans will run in SLOW mode. Fan-voltage of 16.8 V DCmeasured between Pin CNS2.4 and Pin CNS1.4. Disconnecting the plug CN5 results in the fans running atFAST speed. Fan-voltage of 28 V DC measured between Pin CNS2.4 and Pin CNS1.4.5.5 SOAR PROTECTION CIRCUIT TESTChannels separately driven on 4 up to 49 volts, respectively 42.2 volts. Parallel connect a 1 resistor. Theprotection circuit reacts and tries continuously to re-start! The protect-LED lights. Repeat the test with a 2 resistor; the power amplifier should not switch off.5.6 SHORT-CIRCUIT CURRENT-LIMITING TESTperform the test for both power amplifier channels separately and without load:-drive the channel with a burst signal (f = 1 kHz, 1 - 3 cycles, rate 1 sec.) with U(E) = 0 dBu-connect a load resistor of 1 -the short-circuit current-limiter limits the output voltage at the load resistor symmetrically (monitor viaoscilloscope) to a peak voltage value of 35 V, respectively 27 V ( approx. 35 A respectively 27 A maximumpeak output current).5.7 DC-VOLTAGE PROTECTION CIRCUIT TESTperform the test for both power amplifier channels separately:-drive the power amplifier with a test signal (f = 7 Hz) and without loadDownloaded from www.M manuals search engine 3-at an input voltage of approx. 3 Vpeak the protection circuit reacts and tries continuously to re-start!The protect-LED blinks with the same frequency.-Repeat the test with f = 14 Hz; the power amplifier should not switch off.5.8 HF-PROTECTION CIRCUIT TESTCaution: it is mandatory to drive the power amplifier without load resistors connected.Drive the power amplifier with a +20 dBu sine burst signal (40 mS ON, 960 mS OFF) f = 100 kHz applied toeach channel at a time. The protection circuit should react. The power amplifier tries to re-start continuously.The PROTECT LED blinks with the same frequency.Repeat the test with f = 50 kHz; the power amplifier should not switch off.5.9 LED INDICATOR TESTapply a 1 kHz sine signal and increase its level. At approximately -30 dBu the SIGNAL LEDs should light andat about +4 dBu the LIMIT LEDs light.6. Level channel A & B6.1 voltage amplificationunitinputU(E)test pointU(A)load resist.test freq.ForceCH. A/B0.9dBuSPEAKER A/B42.4V1kHzForceCH. A0.9dBuBRIDGED OUT84.8V1kHzEliminatorCH. A/B0.5dBuSPEAKER A/B49V1kHzEliminatorCH. A0.5dBuBRIDGED OUT98V1kHz6.2 MAXIMUM INPUT LEVEL: U (E) = +21 dBu7. GROUND LIFT switchthe circuit ground (at the input or the output connector) is measured versus the common ground of theenclosure (contact at