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1、POWER AMPLIFIER SERVICE MANUAL 130366-1 11-00 Rev. 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

2、 trademarks of Crown International, Inc. Other trademarks are the property of their respective owners. Macro-Tech MA-3600VZ Some models may be exported under the name Amcron RadioFans.CN 收音机爱 好者资料库 MA-3600VZ Service Manual II 130366-1 Rev. A 2000 Crown International, Inc. PRVENIR LE CHOC LECTRIQUE N

3、ENLEVEZ 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 REMOVIN

4、G REAR INPUT MODULE TO ACCESS GAIN SWITCH. CAUTIONAVIS WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT 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

5、 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 46515-1000 Shipping: Plant 2 SW 1718 W. Mishawaka Road Elkhart IN

6、46517 Phone: (800) 342-6939 / (219) 294-8200 FAX: (219) 294-8301 The 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 III 130366-

7、1 Rev. A MA-3600VZ Service Manual 2000 Crown International, Inc. Revision History Revision NumberDateComments Rev. A11-2000Initial Printing RadioFans.CN 收音机爱 好者资料库 MA-3600VZ Service Manual IV 130366-1 Rev. A 2000 Crown International, Inc. This page intentionally left blank V 130366-1 Rev. A MA-3600V

8、Z Service Manual 2000 Crown International, Inc. Table of Contents 1 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.1-1 2 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 Pro

9、tection.2-2 2.7 Construction.2-2 3 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.3-4 4 Maintenance .4-1 4.1 Cautions and Warnings.

10、4-1 4.2 General Information.4-1 4.3 Test Procedures.4-1 5 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.5-19 6 Schematic Diagrams. 6-1 MA-3600VZ Service Manual VI 130366-1 Rev. A 2000 Crown International, Inc. MA-3600VZ

11、Service Manual VI 130366-1 Rev. A This Page Intentionally Left Blank Introduction 1-1 130366-1 Rev. A MA-3600VZ Service Manual 2000 Crown International, Inc. Crown Customer Service Technical Support Group Factory Service Parts Department Mailing Address: P.O. Box 1000, Elkhart IN 46515 Shipping Addr

12、ess: Plant 2 S. W. 1718 W. Mishawaka Rd., Elkhart IN 46517 Phone: (219) 294-8200 Toll Free: (800) 342-6939 Fax: (219) 294-8301 1.1 Introduction This manual contains complete service information on the Crown MA-3600VZ power amplifi er. It is designed to be used in conjunction with the Reference Manua

13、l; 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 ers The Macro-Tech series is a complete fam

14、ily 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, whi

15、ch 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

16、 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 Scope This Service Manual in intended to apply to all versions of the MA-3600VZ amplifier. The Pa

17、rts 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 Warranty Each Reference Manual contains basic policies as related to the customer. In

18、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 Aut

19、horized 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), o

20、r 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 Introduction MA-3600VZ Service Manual Introduction 1-2 130366-1

21、Rev. A 2000 Crown International, Inc. Figure 1.1 MA-3600VZ Front and Rear Views Specifi cations 2-1 130366-1 Rev. A MA-3600VZ Service Manual 2000 Crown International, Inc. 2 Specifi cations These specifi cations apply to 120 VAC units in stereo mode with 8 ohm loads and an input sensitivity of 26 dB

22、 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 Performance Frequency Response: 0.1 dB from 20

23、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

24、 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 outpu

25、t) 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 Power Output 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 watt

26、s 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 i

27、nto 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

28、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

29、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 un

30、its 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 Controls Enable: A front

31、 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. Sens

32、itivity: 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 sign

33、al 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 Indicators Enable: This amber indicator is on when the amplifi er is

34、 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 Manual Specifi cations 2-2 130366-1 Rev. A 2000 Crown International, Inc. 2.7 Constructio

35、n Durable 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) stan

36、dard 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: N

37、et 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 ounc

38、es (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 indic

39、ators 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

40、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/Output Input 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, bal