ElectroVoice-Eliminator-pwr-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL Downloaded 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 diagrams Electro-Voice 600 Cecil Street, Buchanan

2、, Michigan 49107 Phone 616/695-6831 Fax 616/695-1304 e-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 presence of uninsulated “dangerous voltage” within the prod

3、ucts enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintance (servicing) instructions in the literature accompanying the ap

4、pliance. IMPORTANT SAFETY INSTRUCTIONS 1. 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 man

5、ufactures 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 app

6、aratus 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 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 pu

7、rpose 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 an electrican for replacement of the absolete outlet. 1. Security regulati

8、ons 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 mains 3. Switch off the power bef

9、ore 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 dista

10、nce 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 permissible

11、when 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 strictly obeyed. This applies also to any regulations about the work place its

12、elf. 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 INSTRUCTIONS CAUTION: These servicing instructions are for use by qualified personnel only. To reduce the risk of electric sho

13、ck, 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. 1-2 Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库 WARRANTY (Limited) Electro-Voice products are guaran

14、teed against malfunction due to defects in materials or workmanship for a specified period, as noted in the individual product-line statement(s) below, or in the individual product data sheet or owners manual, beginning with the date of original purchase. If such malfunction occurs during the specif

15、ied period, the product will be repaired or replaced (at our option) without charge. The product will be returned to the customer prepaid. Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or appearance; (b) certain specific items described in the individual pro

16、duct-line statement(s) below, or in the individual product data sheet or owners manual; (c) Malfunction resulting from use or operation of the product other than as specified in the product data sheet or owners manual; (d): malfunction resulting from misuse or abuse of the product; or (e): malfuncti

17、on occurring at any time after repairs have been made to the product by anyone other than Electro-Voice or any of its authorized service representatives. Obtaining Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, to Electro-Voice or any of its authorized se

18、rvice representatives together with proof of purchase of the product in the form of a bill of sale or receipted invoice. A list of authorized service representatives is available from Electro-Voice at 600 Cecil Street, Buchanan, MI 49107 (616-695-6831) and/or Electro-Voice West at 9130 Glenoaks Boul

19、evard, Sun Valley, CA 91532 (213-875-1900). Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer are the only remedies provided to the customer. Electro-Voice shall not be liable for any incidental or consequential damages including, without limitat

20、ion, injury to persons or property or loss of use. Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you. Other Rights: This warranty gives you specific legal rights, and you may have other rights which v

21、ary from state to state. Electro-Voice Electronics are guaranteed against malfunction due to defects in materials or workmanship for a period of three (3) years from the date of original purchase. Additional details are included in the Uniform Limited Warranty Statement. Specifications subject to ch

22、ange 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: 877/522-2242 TELEX Communications A.G., Keltenstrasse 11, CH-2563 IPSACH, Switzerlan

23、d, Phone: 011-41/32-51-6833, Fax: 011-41/32-51-1221 EVI Audio Deutschland GmbH, Hirschberger Ring 45, D-94315, Straubing, Germany, Phone: 011-49/9421-7060, Fax: 011-49/9421-706265 EVI Audio France S.A., Parc de Courcerin-Allee Lech Walesa, Lognes, f-77185 Marne La Vallee, France, Phone: 011-33/1-648

24、0-0090, Fax: 011-33/1-6006-5103 EVI Audio Japan Ltd., 2-5-60 Izumi, Suginami-ku, Tokyo, Japan 168, Phone: 011-81/3-3325-7900, Fax: 011-81/3-3325-7789 EVI 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/

25、2-648-5585 EVI Audio (Hong Kong) Limited, Unit E 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

26、/ shielding PIN 2: + INPUT PIN 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 connectors CNS1CNS2CNRC PINassignmentPINassignmentPINassignment 1-Vcc1LIM A Switch1LIM Out A 2BIAS +A2-15V2LIM Out

27、B 3BIAS -A3LIM B Switch3Standby via RC 4FAN Voltage4+15V4Standby LED 5+Vcc5AGND5-Vss 6BIAS +B6Speaker Out A6+Vss 7BIAS -B7Relais/Protect7n.c. 8Temp Heatsink8Speaker Out B8n.c. 1.Operation voltage:U(B) = 120 V, 50 Hz 60 Hz 2.Deviation limit of the operation voltage:-30 % +10 % 3. Power consumption (b

28、oth channels driven) f = 1 kHz ForceEliminator idling power consumption30-60W40-80W nominal power consumption (RL=4)1400W1900W standard power consumption (RL=4)430W600W maximum power consumption (RL=4)1650W2100W power consumption at 1/8 of the maximum output power690W870W 4. Adjustments 4.1 IDLING C

29、URRENT ADJUSTMENT Connect the DC-volt meter at the BIAS measuring points (see service connector) and adjust the idling current via the trim potentiometer VR101/VR301 (on the main PCB printed board assembly). Adjust both channels of the power amplifier A respectively CNS2.3 and CNS2.2 for channel B.

30、Using VR100 respectively VR300 to adjust the power amplifier outputs to their minimum offset (with oscilloscope to minimal peak value or to the audible minimal volume setting). 5. Testing of functions 5.1 OUTPUT - offset voltage DC-voltage measuring at the SPEAKER A/B outputs with U(DC) 10 mV. 5.2 L

31、IMITER 5.2.1 damping test Channels separately driven with a 1 kHz signal up to U(A) = 49 volts, respectively U(A) = 42.2 volts (without load). Increase the input voltage by 10 dB. The LIMITER LED lights and the output voltage increases by about 2 dB to approx. 64 volts, respectively 56 volts; with s

32、light clipping. The distortion rate of the limited signal is at THD = 1.0 1.5 %. Increasing the input signal up to a value of +20 dBu should not result in remarkably higher clipping. 5.2.2 attack and release times perform the test of both power amplifier channels separately: testing without load res

33、istors 1.)Drive the power amplifier input with a burst signal (f = 1 kHz, 10 cycles, rate: 0.5 sec.) and U(E) = +10 dBu. 2.)Use an oscilloscope to monitor the output signal. After 3 - 4 signal periods, the limiter controlled the major distortion down to a minor residual distortion (THD = 1.0 1.5 %).

34、 attack time: 3 - 4 msrelease time: 30 - 40 ms 5.3 POWER-ON DELAY Signal 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 CONTROL Upon p

35、owering-on the power amplifier, the fans will run for about 2 seconds and then stop; presuming that the amplifiers temperature is not too high. In idling condition (power-on, no signal present) the fans are switched between the SLOW and OFF (0 V) mode, depending on the temperature of the heat sink.

36、When CNS1.8 is connected via a 51 kohms resistor with +15 V, the fans will run in SLOW mode. Fan-voltage of 16.8 V DC measured between Pin CNS2.4 and Pin CNS1.4. Disconnecting the plug CN5 results in the fans running at FAST speed. Fan-voltage of 28 V DC measured between Pin CNS2.4 and Pin CNS1.4. 5

37、.5 SOAR PROTECTION CIRCUIT TEST Channels separately driven on 4 up to 49 volts, respectively 42.2 volts. Parallel connect a 1 resistor. The protection 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 o

38、ff. 5.6 SHORT-CIRCUIT CURRENT-LIMITING TEST perform 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 outp

39、ut voltage at the load resistor symmetrically (monitor via oscilloscope) to a peak voltage value of 35 V, respectively 27 V ( approx. 35 A respectively 27 A maximum peak output current). 5.7 DC-VOLTAGE PROTECTION CIRCUIT TEST perform the test for both power amplifier channels separately: -drive the

40、power amplifier with a test signal (f = 7 Hz) and without load Downloaded 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

41、power amplifier should not switch off. 5.8 HF-PROTECTION CIRCUIT TEST Caution: 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 to each channel at a time. The protectio

42、n 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 TEST apply a 1 kHz sine signal and increase its level. At approximately -30 dBu th

43、e SIGNAL LEDs should light and at about +4 dBu the LIMIT LEDs light. 6. Level channel A & B 6.1 voltage amplification unitinputU(E)test pointU(A)load resist.test freq. ForceCH. A/B0.9dBuSPEAKER A/B42.4V1kHz ForceCH. A0.9dBuBRIDGED OUT84.8V1kHz EliminatorCH. A/B0.5dBuSPEAKER A/B49V1kHz EliminatorCH.

44、A0.5dBuBRIDGED OUT98V1kHz 6.2 MAXIMUM INPUT LEVEL: U (E) = +21 dBu 7. GROUND LIFT switch the circuit ground (at the input or the output connector) is measured versus the common ground of the enclosure (contact at the ground terminal, located on the rear panel - or common ground of the mains cord). p

45、osition of the switch:GROUNDED: R = 0 UNGROUNDED : R = 5 8. Amplitudes - non-linearities -testing with load resistor 8 , dual mode - MDW = 80 kHz measuringat nomonal outputremark ForceEliminator THD+N ( f = 1kHz )0.05%0.05% IMD-SMPTE0.08%0.08%60Hz, 7kHz DIM 300.03%0.03%3.15kHz, 15kHz 9. frequency re

46、sponse the frequency response is linear. (please mind the cut-off frequencies) low cut-off frequencyhigh cut-off frequency -3dBfl 10Hzfh = 85kHz -1dBfl = 13Hzfh = 45kHz 10. factory default BRIDGED MODE switch se to NORMAL INPUT ROUTING switch set to DUAL/STEREO LEVEL controls set at their clockwise

47、margin Downloaded from www.M manuals search engine 4 11. Noise interference -U(F) = external voltage un-weighted with B = 22 Hz 22 kHz, effective value (IEC 268-1) -U(G) = noise voltage, frequency-weighting filter according to CCIR-468-3, quasi peak weighted (IEC 268- 1) -U(A) = interference voltage

48、 A-weighted, dB(A), effective value (IEC 268-1) - Signal-to-noise ratio referring to maximum output voltage at 4 and A-weighted interference voltage power ampoutputU(F) dBu U(G) dBu U(A) dBu GAIN dB INPUT(A) dBu S/N-R. dB remark ForceSPEAKER OUT A&B-66.2-55.2-68.234-102.2103 INPUT A&B R(Q) = 50 Elim

49、inatorSPEAKER OUT A&B-65-54-6735-102103 INPUT A&B R(Q) = 50 ForceSPEAKER OUT A&B-68.2-57.2-70.2/ INPUT A&B R(Q) = 50 EliminatorSPEAKER OUT A&B-68-57-70/ INPUT A&B R(Q) = 50 12. Dimensions and weight power amplifierweightdimensions in mm Force15kg483 x 132.5 x 385.5 Eliminator16kg483 x 132.5 x 385.5 Downloaded from www.M manuals search engine Downloaded from www.M manuals search engine Downloaded from www.M manuals search engine Bill of materials 170099ELIMINATOR 2X600W Ref. No.Part no.Description Accessories 358091owners