Studer-970-mix-sm 维修电路原理图.pdf

RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库Professional Audio System ComponentsDate printed: 29.11.01E1CONTENTS1Introduction.32MSC System.42.1Modular Sub-Cards (MSCs). .52.1.1Motherboard for 1 MS-Card .1.914.500.52.1.2Breadboarding Card .1.914.529.52.1.3Line Output Amplifier .1.914.501.62.1.4High-Level Input Amplifier .1.914.502/504.82.1.5Loudspeaker Amplifier .1.914.505.102.1.6Microphone Pre-Amplifiers .1.914.506/507.112.1.7VCA with Electronically Balanced Connections .1.914.515.132.1.8VCA with 1 or 3 Control Ports .1.914.518/528.152.1.9Limiter Voltage Processor .1.914.519.172.1.101900 Hz Signal Generator .1.914.520.192.1.11Call Decoder 20.60 Hz .1.914.521.202.1.12Call Decoder 1900 Hz .1.914.522.212.1.13Relay Sub-Cards .1.914.523/524/525/526 .222.1.140- Input Amplifier with PFL Facility .1.914.530.232.1.15High Level Input with PFL Facility .1.914.531.242.1.16Flip-flop Unit .1.914.532.252.1.1790 Filter .1.914.533.262.1.18Dual Vox Detector .1.914.534.282.1.19Microphone Amplifier with Limiter .1.914.539.292.1.20Dual Fader/VCA Control Voltage Interface .1.914.540 /541.312.2Euro-Cards. .322.2.1Motherboard for 4 MS-Cards .1.915.770.322.2.2Power Supply .1.915.100.332.2.3Audio Generator .1.915.200.352.2.4Monitor Amplifier and Switching Relays (Studio/CR) .1.915.304.372.2.5Distribution Amplifier .1.915.307/308.392.2.65 W Power Amplifier .1.915.410/415.412.2.740 W Power Amplifier .1.915.440/441.432.2.8Monitor Switching Relays .1.915.601/602.452.2.9Transistor-Driven Relays (7+2) .1.915.603.472.2.10Dual Limiter .1.915.700.492.2.11Telephone Hybrid .1.915.760/764.512.2.12Line Equalizer .1.915.776/777/779.532.2.13Dual Balancing Unit/Dual Line Amplifier .1.915.904.562.3Racks and Frames. .592.3.119” Mounting Frame for 3 Euro-Cards .1.918.100.592.3.219” Ventilation Unit/19” Blank Panels .1.918.119/0XX.612.3.319” Euro-Card Mounting Frames .1.918.318/319.622.3.419” Euro-Card Mounting Accessories. .63Professional Audio System ComponentsDate printed: 29.11.01E31 INTRODUCTIONThe individual descriptions and application notes contained in this bro-chure are intended to acquaint designers and project engineers with theStuder Audio System Components. They allow to realize custom-tailoredsignal distribution, signal switching and amplifying systems to satisfy al-most any individual requirement.Euro-Cards (1.915.)The backbone of the system is the so-called Euro-card, a circuit boardmeasuring 100 160 mm, which comes in a great variety of different cir-cuit configurations.Modular Sub-Cards (1.914.)Furthermore, there are the Modular Sub-Cards, small plug-in cards. Fourof them can be accommodated on one Euro-size motherboard, allowing tomake up a system which provides the ultimate in flexibility.Racks, Frames (1.918.)Matching 19” mounting frames and 19” sub-racks for Euro-cards with orwithout power supply are available as well as installation hardware.For prices please consult your local Studer distributor or contact:Studer Professional Audio GmbHAlthardstrasse 30CH-8105 RegensdorfSwitzerlandPhone: +41 44 870 75 11Fax: +41 44 870 71 34e-mail: salesstuder.chWe reserve the right to change the design and the performance specifica-tions of the products listed here as technical progress may warrant.Professional Audio System ComponentsE4Date printed: 29.11.012 MSC SYSTEMTo provide highest possible flexibility for the designer of professionalsound systems, Studer engineers have pursued a completely new concept.The Euro-card is a convenient circuit board as far as its size and its plug-infeatures are concerned. However, it often offers excess space for a par-ticular circuit. This has triggered the idea to utilize the Euro-card simply asa carrier (“motherboard”, order no. 1.915.770) for four smaller plug-incircuit boards, the “Modular Sub-Cards” (MSC).The 32 connections of the Euro-card are divided into 6 supply lines com-mon to the modular sub-cards, and 4 6 individual lines joining the plug-in sockets for each sub-card. The remaining 2 connections are used asseparate bus lines, one of them leading to sub-cards 1 and 2, the other oneto sub-cards 3 and 4, resulting in a total of 13 connections to each MSC. Asmall motherboard for only one MSC is available as well (order no.1.914.500).A great variety of different circuits is available in form of MSCs, such asBalancing amplifiersMicrophone pre-amplifiersSpeaker amplifiers0- input amplifiersLimitersVoltage controlled amplifiers (VCAs)Relay sub-cardsHigh level input amplifiersLine output amplifiers1900 Hz signal generator/decoder90 filter, stereo/monoFlip-flopBreadboarding card (0.1”/2.54 mm grid)To meet the requirements of a system concept, a designer will be able tobuild individual circuits similar to working with a construction set: He ei-ther selects from the available circuits on Euro-cards or makes up his ownEuro-card by simply arranging the most suitable combination of ModularSub-Cards on the motherboard.Professional Audio System ComponentsDate printed: 29.11.01E52.1 Modular Sub-Cards (MSCs)2.1.1 Motherboard for 1 MS-Card1.914.500If only one MS-card is used, this motherboard is helpful for both me-chanical and electrical interfacing. It consists of an aluminium mountingbase (135 36 mm) and a small PCB with a connector for the MS-card;for wiring, this PCB contains solder terminals.Note:For installation of up to four MS-cards, there is a second, Euro-card for-mat motherboard available (1.915.770) that can be installed into an Euro-card rack. Please refer to chapter 2.2.1.Ordering InformationMotherboard for 1 MS-card1.914.500.xx2.1.2 Breadboarding Card1.914.529This experimental board is an empty plug-in PCB compatible with theMSC system. It offers a punched 0.1” grid (2.54 2.54 mm) for individ-ual component placement.Ordering Information:Breadboarding card1.914.529.xxProfessional Audio System ComponentsE6Date printed: 29.11.012.1.3 Line Output Amplifier1.914.501Designed for operation at a nominal line level of +6 dBu (1.55 Vrms), thisamplifier can handle levels of up to +24 dBu (12.3 Vrms), providing an ex-cellent overload margin without the risk of clipping. A unique circuitaround the primary of the amplifiers output transformer ensures excellentfrequency response performance throughout the audible range. Fine andcoarse gain adjustment is provided which allows to accommodate inputlevels in the range from 22.+8 dBu for a nominal +6 dBu output.Professional Audio System ComponentsDate printed: 29.11.01E7Technical SpecificationsInput:Impedance 10 k, electronically balanced (transformerless)Overload point+24 dBuOutput:Impedance 50 , balanced and floatingMinimum load200 Maximum level+24 dBuGain2 dB.+28 dB; adjustment: coarse 0 or 15 dB/fine 2 dB.+13 dBFrequency response0.2 dB, 30 Hz.16 kHzTHD 0.01%, 30 Hz.16 kHzEquivalent input noise 10 k (transformer- or electronically balanced versions available; inputwith RF filter; 0- input selectable with jumpers)Common mode rejection 50 dBOverload point+24 dBu (12.3 Vrms)Output: Impedance33 (pin1), unbalancedMinimum load600 Maximum level+20 dBu (7.75 Vrms)Impedance3.3 k (pin2), unbalanced, for 0- operationMaximum gain1 dBMaximum attenuation30 dBFrequency response0.3 dB, 30 Hz.16 kHzTHD 10 k, balanced and floating (with transformer)Nominal power output2 W into 15 Power output 25 mW.2.5 W into 15 , with 0 dBu inputDistortion 0.5% at 2 W 1 k, for microphones with an impedance of 200 or less.Max. input level2 dBu (615 mVrms); THD at 30 Hz: approx. 1%Common mode rejection 60 dB, unbalanced, to groundOutput:Max. level +20 dBu (7.75 Vrms)Nominal level 0 dBu (0.775 Vrms)Impedance33 (pin1)3.3 k (pin2; to a 0- amp.)Minimum load600 Max. gain71 dB (see level diagram)Frequency response 0.5 dB, 30 Hz.16 kHzTHD 0.3%, 30 Hz.16 kHz at 20 dB gainNoise figure, linear 4.5 dB, input terminated with 200 Supply:15 V (11 mA idling)+48 V (1.914.506, only if phantom powering required)Dimensions:MS-card, 34 85 mmOrdering Information:Microphone pre-amplifier for dynamic microphones1.914.506.xxMicrophone pre-amplifier for electret microphones1.914.507.xxProfessional Audio System ComponentsDate printed: 29.11.01E132.1.7 VCA with Electronically Balanced Connections1.914.515In contrast to the VCA 1.914.518/528 (chapter 2.1.8), this assembly fea-tures an electronically balanced input and output.It is intended for use in balanced audio systems for a variety of applica-tions, especially when gain is to be controlled from a remote point. It willbe useful in audio-video post-production work where suitable DC rampscan control cross-fades, voice-overs, etc. Its high overload margin and itsexceptionally low noise and distortion performance make it the perfectchoice for high-quality audio applications.By connecting the gain control terminals of a number of VCAs to a com-mon potentiometer or fader, several audio channels may thus be con-trolled simultaneously.Two control inputs provide VCA gain control from two different remote pointsProfessional Audio System ComponentsE14Date printed: 29.11.01Technical SpecificationsInput: Impedance 10 k, electronically balancedClipping point+24 dBuOutput:Electronically balancedRecommended load 2 kMaximum level+24 dBuFrequency response0.5 dB, 30 Hz.15 kHzGain/attenuation range+40.100 dB, with ext. controlControl input: pin1; gain tracking0 V = unity gain;1 dB/A; jumper 1-220 dB/V; jumper 2-310 dB/V; jumper 3-4Control input: pin10; gain tracking10 dB/VTHD 3 kClipping point +20 dBuOutput:Impedance 33 or 3.3 k, selectableMax. level+20 dBuRecommended load 2 kFrequency response0.5 dB, 30 Hz.16 kHzExternal gain control +40.90 dB (1.914.518.xx)+40.100 dB (1.914.528.xx)Gain/attenuation range (pot. meter)+40.60 dB / +10.70 dB / +10.90 dB (1.914.518.xx only, jumper-selectable)Gain tracking 10 dB/VTHD 0.1%Equivalent input noise102 dBuSupply:15 V (40 mA)Dimensions:MS-card, 34 85 mmOrdering Information:Voltage controlled amplifier with 1 control port1.914.518.xxVoltage controlled amplifier with 3 control ports1.914.528.xxProfessional Audio System ComponentsDate printed: 29.11.01E172.1.9 Limiter Voltage Processor1.914.519Together with this voltage processor, the VCAs 1.914.518/528 can performas signal level limiters.The processors threshold can be set within a wide range of levels, so thatlimiting action becomes effective at a desired level within a range of15 to +15 dBu. Limiting action attacks within 1 ms, whereas release canvary from 50 ms to 5 s, depending on the programs energy content. Thismeans that no audible “pumping” action which is often associated withsuch a device will occur. After the cessation of loud passages, amplifi-cation will recover only slowly. For stereo applications, a two-channel set-up (VCAs and voltage processor) can be linked, so that identical amountsof gain reduction will take place simultaneously in both channels.The input of the voltage processor has to be wired to the output of theVCA. The processors output, when connected to the VCAs control ter-minal, will effect the necessary gain reduction so that a limiting character-istic is obtained. The limiting threshold is adjustable in a wide range. Re-mote on/off switching of the limiter function is possible.Professional Audio System ComponentsE18Date printed: 29.11.01Technical SpecificationsLimiter:Input impedance 10 kMax. input level+20 dBuFrequency range30 Hz.16 kHzOutput voltage 0.13 VDCThreshold level15 dBu.+15 dBuAttack time1 msRelease time50 ms.5 s, program-dependingCompression ratio20:1, in conjunction with a VCASupply:15 V (10 mA)Dimensions:MS-card, 34 85 mmOrdering Information:Limiter voltage processor1.914.519.xxProfessional Audio System ComponentsDate printed: 29.11.01E192.1.10 1900 Hz Signal Generator1.914.520This signal generator produces a stable frequency of 1900 Hz to establishcommunication on outside broadcast lines, as specified in the EBU/CCIRrecommendations.Technical SpecificationsFrequency1900 Hz (adjustable)Distortion 1%Output level15.+6 dBu (adjustable)Output balanced and floatingOutput Impedance, out 1 20 kFrequency20.60 HzMin. level17 VrmsNominal level70 VrmsSupply:+15 V (5 mA); 15 V (10 mA); 6 V (2 mA)Dimensions:MS-card, 34 85 mmOrdering Information:Call decoder 20.60 Hz1.914.521.xxProfessional Audio System ComponentsDate printed: 29.11.01E212.1.12 Call Decoder 1900 Hz1.914.522This card contains a call receiver for the standardized 1900 Hz call fre-quency on OB lines. It is tuned to respond to 1900 Hz 1 %. The receivercan be switched either to activate an optical or an acoustical signal for theduration of the 1900 Hz call (linked mode), or the acoustical signal can beselected to remain activated until reset (normal mode).The acoustical signal can be generated by an external buzzer (not sup-plied).Technical SpecificationsInput: balanced, floating; no DCFrequency1900 Hz, 1%Impedance 10 kMin. level30 dBuNominal level+24 dBuSupply:+15 V (5 mA); 15 V (10 mA); 6 V (2 mA)Insulation rating500 VDCDimensions:MS-card, 34 85 mmOrdering Information:Call decoder 1900 Hz1.914.522.xxPart No.Qty.Type/Val.DescriptionPos.Idx.Part No.Qty.Type/Val.DescriptionPos.Idx.Studer Audio ComponentsPage: 1 of 1Call Decoder 1900 Hz 1.914.522.00 ( 1)C 259.06.01021n0PETP, 63V, 10%, RM50 C 359.06.01021n0PETP, 63V, 10%, RM50 C 459.06.02222n2PETP, 63V, 10%, RM50 C 559.05.24724n7PP, 2.5%, 63V0 C 659.34.4121120pCER 63V, 5%, N7500 C 759.06.010310nPETP, 63V, 10%, RM50 C 859.26.52292u2SAL, 20%, 25V0 C 959.06.0224220nPETP, 63V, 10%, RM50 C 1059.06.5474470nPETP, 63V, 5%, RM50 C 1159.26.26896u8SAL 16V 20%0 C 1259.26.26896u8SAL 16V 20%0 C 1359.26.26896u8SAL 16V 20%0 C 1459.26.26896u8SAL 16V 20%0 D 350.04.01251N444875V, 150mA, 4ns, DO-350 D 450.04.01251N444875V, 150mA, 4ns, DO-350 D 550.04.01251N444875V, 150mA, 4ns, DO-350 D 650.04.01251N444875V, 150mA, 4ns, DO-350 D 750.04.111712VZener, 5%, 0.5W, DO-350 IC 150.09.0101TL072Dual op-amp biFET0 IC 250.07.0032FX101IC FX-101 L, ,A0 IC 350.07.10114011Quad 2-inp NAND1 P 154.01.027313pStecker CIS parallelsteck0 Q 150.03.0515BC307BPNP 100mA 45V0 Q 250.03.0436BC237BNPN 100mA 45V0 R 157.11.35625k6MF, 1%, 02070 R 257.11.35625k6MF, 1%, 02070 R 357.11.312312kMF, 1%, 02070 R 457.11.3104100kMF, 1%, 02070 R 557.11.33923k9MF, 1%, 02070 R 757.11.51551M5MF, 5%, 02070 R 858.01.820320kCermet, 10%, 0.5W, horizontal0 R 957.11.3154150kMF, 1%, 02070 R 1057.11.3104100kMF, 1%, 02070 R 1157.11.3104100kMF, 1%, 02070 R 1257.11.310310kMF, 1%, 02070 R 1357.11.310310kMF, 1%, 02070 R 1457.11.52252M2MF, 5%, 02070 R 1557.11.3104100kMF, 1%, 02070 R 1657.11.52252M2MF, 5%, 02071 R 1757.11.31051M0MF, 1%, 02070 R 1857.11.3104100kMF, 1%, 02070 R 1957.11.52252M2MF, 5%, 02071 R 2057.11.31051M0MF, 1%, 02070 R 2157.11.3104100kMF, 1%, 02070 R 2257.11.322022RMF, 1%, 02070 R 2357.99.020650RPTC, 25V, 0.5W0 R 2457.99.020650RPTC, 25V, 0.5W0 R 2557.99.020650RPTC, 25V, 0.5W0 R 2657.11.3391390RMF, 1%, 02070 T 11.022.218.001 : 1EINGANGSTRAFO 1 : 10 End of ListComments:(01) IC3, R16, R19 changedDate printed: 06.11.2006Professional Audio System ComponentsE22Date printed: 29.11.012.1.13 Relay Sub-Cards1.914.523/524/525/526Audio signal ro