Crown-MacroTechMA3600VZ-pwr-sm维修电路原理图.pdf

POWER AMPLIFIERSERVICE MANUAL130366-111-00Rev. A 2000 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-294-8000. Trademark Notice: PIP, Grounded Bridge, and SmartAmp are trademarks and Amcron, Crown, Macro-Tech, IOC, ODEP and IQ System are registered trademarks of Crown International, Inc. Other trademarks are the property of their respective owners.Macro-TechMA-3600VZSome models may be exported under the name AmcronRadioFans.CN 收音机爱 好者资料库MA-3600VZ Service Manual II130366-1 Rev. A2000 Crown International, Inc. PRVENIR LE CHOC LECTRIQUE NENLEVEZ PAS LES COUVERTURES. RIEN DES PARTIES UTILES LINTRIEUR. DBRANCHER LA BORNE AVANT DOUVRIR LA MODULE EN ARRIRE.TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSON-NEL. DISCONNECT POWER CORD BEFORE REMOVING REAR INPUT MODULE TO ACCESS GAIN SWITCH.CAUTIONAVISWARNINGTO REDUCE THE RISK OF ELECTRICSHOCK, DO NOT EXPOSE THISEQUIPMENT TO RAIN OR MOISTURE!The information furnished in this manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. If you need special assistance beyond the scope of this manual, please contact the Crown Technical Support Group.Mail: P.O. Box 1000 Elkhart IN 46515-1000Shipping: Plant 2 SW 1718 W. Mishawaka Road Elkhart IN 46517Phone: (800) 342-6939 / (219) 294-8200FAX: (219) 294-8301The lightning bolt tri-angle is used to alert the user to the risk of electric shock.The exclamation point trian-gle is used to alert the user to important operating or main-tenance instructions.RadioFans.CN 收音机爱 好者资料库 III130366-1 Rev. AMA-3600VZ Service Manual2000 Crown International, Inc.Revision HistoryRevision NumberDateCommentsRev. A11-2000Initial PrintingMA-3600VZ Service Manual IV130366-1 Rev. A2000 Crown International, Inc.This page intentionally left blank V130366-1 Rev. AMA-3600VZ Service Manual2000 Crown International, Inc.Table of Contents1 Introduction.1-1 1.1 Introduction.1-1 1.2 The Macro-Tech Series Amplifi ers.1-1 1.3 Scope.1-1 1.4 Warranty.1-12 Specifi cations.2-1 2.1 Performance .2-1 2.2 Power.2-1 2.3 Controls.2-1 2.4 Indicators.2-1 2.5 Input/Output.2-2 2.6 Protection.2-2 2.7 Construction.2-23 Theory of Operation.3-1 3.1 Overview.3-1 3.2 Features.3-1 3.3 Front End Operation.3-1 3.4 Voltage Amplifi cation .3-2 3.5 Grounded Bridge Topology .3-2 3.6 Output Device Emulation Protection (ODEP).3-4 3.7 VZ Power.3-44 Maintenance .4-1 4.1 Cautions and Warnings. 4-1 4.2 General Information.4-1 4.3 Test Procedures.4-15 Parts.5-1 5.1 General Information.5-1 5.2 Ordering and Receiving Parts . 5-1 5.3 Mechanical Parts.5-1 5.4 Circuit Board Parts.5-196 Schematic Diagrams. 6-1MA-3600VZ Service Manual VI130366-1 Rev. A2000 Crown International, Inc.MA-3600VZ Service Manual VI130366-1 Rev. AThis Page Intentionally Left BlankIntroduction 1-1130366-1 Rev. AMA-3600VZ Service Manual2000 Crown International, Inc.Crown Customer ServiceTechnical Support GroupFactory ServiceParts DepartmentMailing Address: P.O. Box 1000, Elkhart IN 46515Shipping Address: Plant 2 S. W.1718 W. Mishawaka Rd., Elkhart IN 46517Phone: (219) 294-8200Toll Free: (800) 342-6939Fax: (219) 294-8301http:/1.1 IntroductionThis manual contains complete service information on the Crown MA-3600VZ power amplifi er. It is designed to be used in conjunction with the Reference Manual; however, some important information is duplicated in this Service Manual in case the Reference Manual is not readily available.NOTE: THE INFORMATION IN THIS MANUAL IS INTENDED FOR USE BY AN EXPERIENCED TECHNICIAN ONLY!1.2 The Macro-Tech Series Amplifi ersThe Macro-Tech series is a complete family of amplifiers designed for pro sound reinforcement. Macro-Tech amplifiers are designed to provide enormous levels of pure, undistorted power in a rugged low-profile package, utilizing Crowns patented Grounded Bridge output topology. They also employ Crowns patented ODEP protection circuitry, which keeps the amplifi er working under extreme conditions that would shut down a lesser amplifi er. The MA-3600VZ features Crowns PIP (Programmable Input Processor) expansion system. The PIP expansion system makes it easy to tailor the amplifier to a specific application. Providing high power amplifi cation from 20 Hz to 20 kHz with minimum distortion, Macro-Tech series amplifiers feature balanced inputs with bridged and parallel monophonic capability. Specific features vary depending on model. 1.3 ScopeThis Service Manual in intended to apply to all versions of the MA-3600VZ amplifier. The Parts Listings include parts specifi c for the US version and the European version (E17CE). For parts specifi c only to other versions contact the Crown Technical Support Group for help in fi nding part numbers.1.4 WarrantyEach Reference Manual contains basic policies as related to the customer. In addition, it should be stated that this service documentation is meant to be used only by properly trained personnel. Because most Crown products carry a 3-Year Full Warranty (including round trip shipping within the United States), all warranty service should be referred to the Crown Factory or Authorized Warranty Service Center. See the applicable Reference Manual for warranty details. To fi nd the location of the nearest Authorized Warranty Service Center or to obtain instructions for receiving Crown Factory Service, please contact the Crown Technical Support Group (within North America), or your Crown/Amcron Importer (outside North America). If you are an Authorized Warranty Service Center and have ques-tions regarding the warranty of a product, please contact the Field Service Manager or the Technical Support Group.1 IntroductionMA-3600VZ Service ManualIntroduction 1-2130366-1 Rev. A2000 Crown International, Inc.Figure 1.1 MA-3600VZ Front and Rear ViewsSpecifi cations 2-1130366-1 Rev. AMA-3600VZ Service Manual2000 Crown International, Inc.2 Specifi cationsThese specifi cations apply to 120 VAC units in stereo mode with 8 ohm loads and an input sensitivity of 26 dB unless otherwise specifi ed.120 VAC, 60 Hz Units: These units are equipped with transformers rated for 120 VAC, 60 Hz power.International Units: These units are equipped with transformers for either 100 VAC, 50/60 Hz, or 230 VAC, 50/60 Hz power.2.1 PerformanceFrequency Response: 0.1 dB from 20 Hz to 20 kHz at 1 watt. Phase Response: 10 from 10 Hz to 20 kHz at 1 watt. Signal-to-Noise Ratio: Greater than 105 dB below rated output (20 Hz to 20 kHz, A-weighted); 100 dB below rated output (20 Hz to 20 kHz, no weighting).Harmonic Distortion (THD): At rated output, less than 0.05% from 20 Hz to 1 kHz increasing linearly to less than 0.1% at 20 kHz.IM Distortion (IMD): Less than 0.05% from 368 milliwatts to full rated output.Damping Factor: Greater than 1,000 from 10 Hz to 400 Hz. Crosstalk: See Figure 2.1.Slew Rate: Greater than 30 volts per microsecond.Voltage Gain: (At maximum output) 20:1 3% or 26 dB 0.25 dB at +26 dB sensitivity, and 124.6:1 12% or 41.9 dB 1.0 dB at 0.775 volt sensitivity.2.2 PowerOutput Power:Note: Maximum average watts per channel (unless in Mono mode) at 1 kHz with 0.1% or less THD.120 VAC, 60 Hz Units: Stereo mode with both channels driven: 1800 watts into 2 ohms. 1565 watts into 4 ohms. 1120 watts into 8 ohms. Bridge-Mono mode: 3505 watts into 4 ohms. 3140 watts into 8 ohms. Parallel-Mono mode: 3555 watts into 1 ohm. 3190 watts into 2 ohms.100 VAC International Units: Stereo mode with both channels driven: 1460 watts into 2 ohms. 1300 watts into 4 ohms. 980 watts into 8 ohms. Bridge-Mono mode: 2835 watts into 4 ohms. 2625 watts into 8 ohms. Parallel-Mono Mode 2820 watts into 1 ohm. 2585 watts into 2 ohms.120 VAC International Units: Stereo mode with both channels driven: 1490 watts into 2 ohms. 1300 watts into 4 ohms. 985 watts into 8 ohms. Bridge-Mono mode: 2980 watts into 4 ohms. 2600 watts into 8 ohms. Parallel-Mono Mode 2980 watts into 1 ohm. 2600 watts into 2 ohms.230 VAC International Units: Stereo mode with both channels driven: 1520 watts into 2 ohms. 1325 watts into 4 ohms. 965 watts into 8 ohms. Bridge-Mono mode: 2800 watts into 4 ohms. 2515 watts into 8 ohms. Parallel-Mono Mode 2910 watts into 1 ohm. 2565 watts into 2 ohms.Load Impedance: Rated for 16, 8, 4, and 2 ohm use only. Safe with all types of loads, even reactive ones.AC Power Requirements: 100 VAC, 50/60 Hz; 120 VAC, 50/60 Hz; and 230 VAC, 50/60 Hz units are available. 230 VAC, 50/60 Hz units can be used with 220 and 240 VAC. All versions draw 90 watts or less at idle. 100 and 120 VAC units can draw up to 30 amps of current; 230 VAC units can draw up to 15 amps. Refer to the back panel for your units specifi cations. 2.3 ControlsEnable: A front panel push button used to turn the amplifi er on and off.Level: A 31-position detented rotary attenuator for each channel located on the front panel used to control the output level.Stereo/Mono: A three-position back panel switch used to select Stereo, Bridge-Mono or Parallel-Mono operation.Sensitivity: A three-position switch located inside the PIP compartment used to select one of three input sensitivities for both channels: 0.775 volts or 1.4 volts for standard 1 kHz power or a voltage gain of 26 dB.Input Ground Lift: A two position back panel switch used to isolate the phone jack signal grounds from the chassis (AC) ground.Reset: A back panel button for each channel used to reset the corresponding power supply. 100 and 120 VAC units have 15 amp circuit breakers. 230 VAC units have 7.5 amp circuit breakers.2.4 IndicatorsEnable: This amber indicator is on when the amplifi er is switched on to show that the low voltage power supply is operating.Signal / IOC: Two green indicators fl ash with medium inten-sity in sync with the amplifi ers outputs to show signal pres-MA-3600VZ Service ManualSpecifi cations 2-2130366-1 Rev. A2000 Crown International, Inc.2.7 ConstructionDurable black powder coated steel chassis and aluminum front panel with Lexan overlay; specially designed “fl ow-through” ventilation from front to side panels.Cooling: Forced-air with custom heat diffusers and patented circuitry to promote uniform dissipation.Dimensions: 19 inch (48.3 cm) standard rack mount (EIA Std. RS-310-B), 3.5 inch (8.9 cm) height, 16 inch (40.6 cm) depth behind mounting surface and 2.5 inches (6.4 cm) in front of mounting surface (see Figure 2.2).Approximate Weight: Center of gravity is 6 inches (15.2 cm) behind the front mounting surface. 120 VAC, 60 Hz Units: Net weight 55 lbs, 1.5 ounces (25.0 kg); shipping weight 63 lbs, 10 ounces (28.9 kg). 100 VAC International Units: Net weight 54 lbs, 5 ounces (24.7 kg); shipping weight 63 lbs, 0.5 ounces (28.6 kg). 120 VAC International Units: Net weight 55 lbs, 1.5 ounces (25.0 kg); shipping weight 63 lbs, 10 ounces (28.9 kg). 230 VAC International Units: Net weight 53 lbs, 6 ounces (24.2 kg); shipping weight 61 lbs, 15 ounces (28.1 kg).ence. In the unlikely event the output waveform differs from that of the input by 0.05% or more, they fl ash brightly to indi-cate distortion. As sensitive distortion indicators they provide proof of performance. Note: It is normal for the Channel 2 IOC indicator to remain on in Parallel-Mono mode.ODEP: Each channel has a multifunction LED (light emitting diode) indicator that shows the channels energy reserve status. Normally, the LEDs are brightly lit to show that reserve energy is available. An indicator will dim proportionally as the energy reserve for its channel decreases. In the rare event that a channel has no reserve energy, the indicator turns off and ODEP proportionally limits the channels output drive level so the amplifi er can continue safe operation even when conditions are severe.2.5 Input/OutputInput Connector: Balanced -inch phone jacks on chassis and internal PIP connector. (Balanced 3-pin XLR connectors are provided on the P.I.P.-FX which is a standard feature.)Input Impedance: Nominally 20 k ohms, balanced. Nominally 10 K ohms, unbalanced.Input Sensitivity: Switchable between 0.775 V (unbalanced) for rated output or a fi xed voltage gain of 26 dB.Output Connector: Color-coded dual binding posts (banana jacks).Output Impedance: Less than 10 milliohms in series with less than 2 microhenries.DC Output Offset: (Shorted input) 10 millivolts.Output Signal; Stereo: Unbalanced, two-channel, Bridge-Mono: Balanced, single-channel. Channel 1 controls are active; Channel 2 controls are inactive and not removed from operation, Parallel-Mono: Unbalanced, single-channel. Channel 1 controls are active; Channel 2 controls are inactive but notremoved from operation.2.6 ProtectionMacro-Tech amplifi ers are protected against shorted, open or mismatched loads; overloaded power supplies; excessive temperature, chain destruction phenomena, input overload damage and high-frequency blow-ups. They also protect loudspeakers from input/output DC and turn-on/turn-off tran-sients.If unreasonable operating conditions occur, the patented ODEP circuitry proportionally limits the drive level to protect the output devices, particularly in the case of elevated tem-perature. Transformer overheating results in a temporary shutdown of the offending channel. When it has cooled to a safe temperature, the transformer automatically resets itself. Controlled slew rate voltage amplifi ers protect against RF burnouts, and input overload protection is provided by cur-rent-limiting resistance at the input.Turn On: The four second turn-on delay prevents dangerous turn-on transients. Turn-on occurs at zero crossing of the AC waveform, so power sequencers are rarely needed with multiple units. Note: The turn-on delay time may be changed. Contact Crowns Technical Support Group for details.Circuit Breaker: Circuit breaker current ratings vary based on the AC operating power.Figure 2.1 Typical CrosstalkFigure 2.2 Dimensions1001 K10 K20 KFREQUENCY (Hz)dBTEFTheory of Operation 3-1130366-1 Rev. AMA-3600VZ Service Manual2000 Crown International, Inc.3 Theory of Operation3.1 OverviewIt should be noted that over time Crown makes improvements and changes to their products for various reasons. This manual is up to date as of the time of writing. For additional information regarding these amplifi ers, refer to the applicable Technical Notes provided by Crown for this product.This section of the manual explains the general operation of a Macro-Tech 3600VZ power amplifi er. Topics covered include Front End, Grounded Bridge, ODEP, and VZ supply. Due to variations in design from vintage to vintage (and similarities with other Crown products) the theory of operation remains simplifi ed.3.2 FeaturesMacro Tech amplifiers utilize numerous Crown innovations including grounded bridge and ODEP technologies. Cooling techniques make use of the what is essentially air conditioner technology. Air fl ows