Crown_Micro-Tech_Series_Operation_Manual电路图.pdf

Operation Manual Micro-Tech 600, 1200, Conducted, Class B EN 55103-2:1996 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity EN 61000-4-2:1995 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge) EN 61000-4-3:1996 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, Criteria A) EN 61000-4-4:1995 Electrical Fast Transient/Burst Immunity (Criteria B) EN 61000-4-5:1995 Surge Immunity (Criteria B) EN 61000-4-6:1996 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A) EN 61000-4-11:1994 Voltage Dips, Short Interruptions and Voltage Variation Safety Standard: EN 60065: 1998 Safety Requirements - Audio Video and Similar Electronic Apparatus I certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC. Signed Title: Senior Vice President of Manufacturing Date of Issue: January 1, 2001 Issued By: Crown International, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A. Due to line current harmonics, we recommend that you contact your supply authority before connection. Larry Colburn RadioFans.CN 收音机爱 好者资料库 Operation Manual Micro-Tech Series Power Amplifiers page 4 Table of Contents Important Safety Instructions .2 Declaration of Conformity .3 1 Welcome . 5 1.1 Features .5 1.2 Unpacking Your Amplifier .5 2 How to Use This Manual . 5 3 Setup . 6 3.1 Unpack Your Amplifier .6 3.2 Install Your Amplifier .6 3.3 Ensure Proper Cooling .6 3.4 Choose Input Wire and Connectors .7 3.5 Choose Output Wire and Connectors .8 3.6 Wire Your System .9 3.6.1 Stereo Mode .9 3.6.2 Bridge-Mono Mode .9 3.6.3 Parallel-Mono Mode .9 3.7 Set Input Sensitivity .10 3.8 Set Ground Lift Switch .10 3.9 Connect to AC Mains .10 3.10 Startup Procedure .10 4 Operation . 11 4.1 Precautions .11 4.2 Controls, Indicators and Connectors .12 4.2.1 Front Panel Facilities .12 4.2.2 Rear Panel Facilites.13 5 Advanced Features and Options .14 5.1 Protection Systems .14 5.1.1 ODEP .14 5.1.2 Ultrasonic and Radio Frequency Protection .14 5.1.3 Drive Protection .14 5.1.4 Transformer Thermal Protection .14 5.1.5 Fuses and Circuit Breakers .14 5.2 Accessories .15 5.2.1 Cooling Fan Options .15 5.2.2 Input Connectors Option .15 5.3 Filter Cleaning .15 6 Principles of Operation .16 6.1 Overview .16 6.2 Circuit Theory .16 6.2.1 Stereo Operation .17 6.2.2 Bridge-Mono Operation .18 6.2.3 Parallel-Mono Operation .18 7 Troubleshooting .19 8 Specifications .20 9 AC Power Draw and Thermal Dissipation .22 10 Service .24 10.1 Worldwide Service .24 10.2 US and Canada Service .24 10.2.1 Service at a US or Canada Service Center .24 10.2.2 Factory Service .24 10.2.3 Factory Service Shipping Instructions .24 11 Warranty .25 Crown Factory Service Information Form .27 page 5 Micro-Tech Series Power Amplifiers Operation Manual 1 Welcome The Crown Micro-Tech 600, 1200 and 2400 are the original industry standards for touring amplifiers. Micro-Tech amplifiers are known around the world as the benchmark for high- density, ultra-pure power in a compact pack- age. In addition, each model gives you Crowns legendary ODEP protection to keep the show going long after other amplifiers would fail. Models MT-601, 1201 and 2401(for Japan) are identical to corresponding models MT-600, 1200 and 2400. Modern power amplifiers are sophisticated pieces of engineering capable of producing extremely high power levels. They must be treated with respect and correctly installed if they are to provide the many years of reliable service for which they were designed. In addition, the Micro-Tech amplifiers include a number of features which require some expla- nation before they can be used to their maxi- mum advantage. Please take the time to study this manual so that you can obtain the best possible service from your amplifier. 1.1 Features Grounded Bridge design delivers incredible voltage swings without stress- ing output transistors. This results in sig- nificantly lower distortion and superior reliability. Patented ODEP (Output Device Emula- tion Protection) circuitry compensates for overheating and overload to keep the amplifier working. High damping factor provides superior motion control over low-frequency drivers for clean, accurate low end. Two mono modes (Bridge-Mono and Par- allel-Mono) for driving a wide range of load impedances. Full protection against shorted outputs, open circuits, DC, mismatched loads, general overheating, high-frequency over- loads and internal faults. 1.2 Unpacking Your Amplifier Please unpack and inspect your amplifier for any damage that may have occurred during transit. If damage is found, notify the transpor- tation company immediately. Only you can ini- tiate a claim for shipping damage. Crown will be happy to help as needed. Save the shipping carton as evidence of damage for the shippers inspection. We also recommend that you save all packing materials so you will have them if you ever need to transport the unit. Never ship the unit without the factory pack. 2 How to Use This Manual This manual provides you with the necessary information to safely and correctly set up and operate your amplifier. It does not cover every aspect of installation, setup or operation that might occur under every condition. For addi- tional information, please consult Crowns Amplifier Application Guide (available online at ), Crown Tech Support, your system installer or retailer. We strongly recommend you read all instruc- tions, warnings and cautions contained in this manual. Also, for your protection, please send in your warranty registration card today. And save your bill of sale-its your official proof of purchase. Operation Manual Micro-Tech Series Power Amplifiers page 6 3.1 Unpack Your Amplifier YOU WILL NEED (not supplied): Input wiring cables Output wiring cables Rack for mounting amplifier (or a stable surface for stacking) WARNING: Before you start to set up your amplifier, make sure you read and observe the Important Safety Instruc- tions found at the beginning of this man- ual. 3.2 Install Your Amplifier CAUTION: Before you begin, make sure your amplifier is disconnected from the power source, with power switch in the “off” position and all level controls turned completely down (counterclock- wise). Use a standard 19-inch (48.3 cm) equipment rack. See Figure 3.1 for amplifier dimensions. You may also stack amps without using a cabi- net. NOTE: When transporting, amplifiers should be supported at both front and back. 3.3 Ensure Proper Cooling When using an equipment rack, mount units directly on top of each other. Close any open spaces in rack with blank panels. DO NOT block front or rear air vents. The side walls of the rack should be a minimum of two inches (5.1 cm) away from the amplifier sides, and the back of the rack should be a minimum of four inches (10.2 cm) from the amplifier back panel. Figure 3.2 illustrates standard amplifier airflow. 3 Setup Figure 3.2 Airflow Figure 3.1 Mounting Dimensions ODEP CH1CH2 POWER OFF 19 in 48.3 cm 16 in 40.6 cm 3.5 in 8.9 cm SIDE VIEW page 7 Micro-Tech Series Power Amplifiers Operation Manual 3.4 Choose Input Wire and Connectors Crown recommends using pre-built or profes- sionally wired, balanced line (two-conductor plus shield), 22-24 gauge cables and connec- tors. Depending upon which amplifier input you choose, you should use either 3-pin male XLR connectors, TRS phone connectors, or terminal forks at the amplifier inputs. Unbalanced lines may also be used but may result in noise over long cable runs. The amplifier input connectors not used for audio signal input may be used to daisy-chain the audio signal to other components. Figure 3.3 shows connector pin assignments for balanced wiring, and Figure 3.4 shows connec- tor pin assignments for unbalanced wiring NOTE: Custom wiring should only be performed by qualified personnel. Figure 3.3 Balanced Input Connector Wiring Figure 3.4 Unbalanced Input Connector Wiring 3 Setup Operation Manual Micro-Tech Series Power Amplifiers page 8 3.5 Choose Output Wire and Con- nectors Crown recommends using pre-built or profes- sionally wired, high-quality, two-conductor, heavy gauge speaker wire and connectors. Use banana plugs, spade lugs or bare wire for your output connectors (Figure 3.5). To prevent short circuits, wrap or otherwise insulate exposed loudspeaker cable connectors. Using the guidelines below, select the appropri- ate size of wire based on the distance from amplifier to speaker. CAUTION: Never use shielded cable for output wiring. DistanceWire Size up to 25 ft.16 gauge 26-40 ft.14 gauge 41-60 ft.12 gauge 61-100 ft.10 gauge 101-150 ft.8 gauge 151-250 ft.6 gauge Figure 3.5 Output Connections 3 Setup page 9 Micro-Tech Series Power Amplifiers Operation Manual 3.6 Wire Your System 3.6.1 Stereo Mode Typical input and output wiring is shown in Figure 3.6. Turn off the amplifier, and set the Stereo/Mono mode switch on the back to Stereo. INPUTS: Connect input wiring for both channels. OUTPUTS: Maintain proper polarity (+/-) on out- put connectors. Connect Channel 1 positive (+) speaker load to Channel 1 positive terminal of amp; repeat for negative (-). Repeat Channel 2 wiring as for Channel 1. 3.6.2 Bridge-Mono Mode Typical input and output wiring is shown in Figure 3.6. Turn off the amplifier, and set the Stereo/Mono mode switch on the back to Bridge Mono. INPUTS: Connect input wiring to Channel 1 only. OUTPUTS: Connect the speaker across the posi- tive (red) terminals of each channel. Do not use the negative terminals when the amp is being operated in Bridge-Mono mode. The load must be balanced so neither lead is connected to ground. CAUTION: Connect only balanced equip- ment (meters, switches, etc.) to the Bridge-Mono output. Both sides of the line must be isolated from the input grounds or oscillations may occur. NOTE: To prevent distortion and low lev- els, the Channel 2 level control should be set fully counter-clockwise when operat- ing the amplifier in Bridge-Mono mode. NOTE: Crown provides a reference of wiring pin assignments for commonly used connector types in the Crown Amplifier Application Guide (Section 1.21.) available at . 3 Setup 3.6.3 Parallel-Mono Mode Typical input and output wiring is shown in Figure 3.6. Turn off the amplifier, and set the Ste- reo/Mono mode switch on the back to Parallel Mono. Turn down the Channel 2 level control. INPUTS: Connect input wiring to Channel 1 only. OUTPUTS: Connect positive (+) speaker load to amplifier Channel 1 red (+) binding post. Con- nect negative (-) speaker load to amplifier Chan- nel 1 black (-) binding post. Add a 14 gauge (or larger) jumper wire between the red (+) binding posts of both channels 1 and 2. CAUTION: When the amplifier is wired for Parallel-Mono mode, do not change the rear switch to Stereo or Bridge-Mono. Doing that will result in inefficient opera- tion, high distortion and excessive heat- ing. NOTE: Crown provides a reference of wiring pin assignments for commonly used connector types in the Crown Amplifier Application Guide (Section 1.21.) available at www.crownaudio. Figure 3.6 Three System Connection Methods Operation Manual Micro-Tech Series Power Amplifiers page 10 3 Setup 3.7 Set Input Sensitivity The three-position input sensitivity switch is located inside the amplifier behind the MT-XLR module (Figure 4.2 letter “I”). The switch is set at the factory to a sensitivity of 0.775 volt for standard 1 kHz power into 8 ohms. (Factory setting for International versions is 1.4 V.) If desired, the sensitivity can be switched to 1.4 volts for standard 1 kHz power into 8 ohms, or a voltage gain of 26 dB. The 26 dB gain setting is equivalent to a sensitivity of 2.1 volts for the Micro-Tech 600, 2.5 volts for the Micro-Tech 1200 and 3.2 volts for the Micro-Tech 2400. To change the input sensitivity: 1. Remove the back panel cover plate (or input connector accessory). 2. Locate the access hole for the sensitivity switch inside the chassis opening (Figure 3.7). The sensitivity switch will not be vis- ible because it is mounted below the hole. Use your little finger to reach it. 3. Set the switch to the desired position noted on the label beside the access hole. 4. Replace the back panel cover plate (or input connector accessory). 3.8 Set Ground Lift Switch The ground lift switch (Figure 3.7) is located on the back panel and can isolate the input sig- nal grounds from the AC (chassis) ground. It affects only the phone jack inputs and has no effect on accessory input connectors. Slidin