Crown Micro Tech 600 1200 2400 Operation Manual

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Micro-Tech Series Power Amplifiers page 2Operation Manual 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 dry cloth. 7) Do not block any ventilation openings. Install in accordance with the manufacturers instruc- tions. 8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat. 9) Do not defeat the safety purpose of the polar- ized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10) Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 11) Only use attachments/accessories specified by the manufacturer. 12) Use only with a cart, stand, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. 13) Unplug this apparatus during lightning storms or when unused for long periods of time. 14) Refer all servicing to qualified service person- nel. Servicing is required when the apparatus 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. 15) To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM COVERS. NO USER SERVICE- ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. À PRÉVENIR LE CHOC ÉLECTRIQUE NENLEVEZ PAS LES COUVERCLES. IL N Y A PAS DES PAR- TIES SERVICEABLE À LINTÉRIEUR. TOUS REPA- RATIONS DOIT ETRE FAIRE PAR PERSONNEL QUALIFIÉ SEULMENT. IMPORTANT The Micro-Tech 2400/2401 requires Class 1 output wiring. The Micro-Tech 600/601/ & 1200/1201 require Class 2 output wiring. MAGNETIC FIELD CAUTION! Do not locate sensitive high-gain equip- ment such as preamplifiers or tape decks directly above or below the unit. Because this amplifier has a high power density, it has a strong magnetic field which can induce hum into unshielded devices that are located nearby. The field is strongest just above and below the unit. If an equipment rack is used, we recommend locat- ing the amplifier(s) in the bottom of the rack and the preamplifier or other sensitive equipment at the top. WATCH FOR THESE SYMBOLS: The lightning bolt triangle is used to alert the user to the risk of electric shock. The exclamation point triangle is used to alert the user to important operating or maintenance instruc- tions. Important Safety Instructions

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Micro-Tech Series Power Amplifiers page 3 Operation Manual Table of Contents Important Safety Instructions ........................... 2 1 Welcome .......................................................... 4 1.1 Features ...................................................... 4 1.2 Unpacking Your Amplifier ........................... 4 2 How to Use This Manual ............................... 4 3 Setup ................................................................. 5 3.1 Unpack Your Amplifier ............................... 5 3.2 Install Your Amplifier ................................. 5 3.2 Ensure Proper Cooling .............................. 5 3.4 Choose Input Wire and Connectors ........... 6 3.5 Choose Output Wire and Connectors ........ 7 3.6 Wire Your System ...................................... 8 3.6.1 Stereo Mode ..................................... 8 3.6.2 Bridge-Mono Mode .......................... 8 3.6.3 Parallel-Mono Mode ........................ 8 3.7 Set Input Sensitivity ................................... 9 3.8 Set Ground Lift Switch ............................... 9 3.9 Connect to AC Mains ................................ 9 3.10 Startup Procedure .................................... 9 4 Operation ........................................................ 10 4.1 Precautions ................................................ 10 4.2 Controls, Indicators and Connectors .......... 11 4.2.1 Front Panel Facilities ......................... 11 4.2.2 Rear Panel Facilites ............................ 125 Advanced Features and Options ...................................... 13 5.1 Protection Systems ........................................................ 13 5.1.1 Odep ..................................................................... 13 5.1.2. Ultrasonic and Radio Frequency Protection ......... 13 5.1.3 Drive Protection .................................................... 13 5.1.4 Transformer Thermal Protection ........................... 13 5.1.5 Fuses and Circuit Breakers ................................... 13 5.2 Accessories ................................................................... 14 5.2.1 Cooling Fan Options ............................................ 14 5.2.2 Input Connectors Option ..................................... 14 5.3 Filter Cleaning ............................................................... 14 6 Principles of Operation ..................................................... 15 6.1 Overview ....................................................................... 15 6.2 Circuit Theory ............................................................... 15 6.2.1 Stereo Operation ................................................... 16 6.2.2 Bridge-Mono Operation ........................................ 17 6.2.3 Parallel-Mono Operation ...................................... 17 7 Troubleshooting .................................................................. 18 8 Specifications ..................................................................... 19 9 AC Power Draw and Thermal Dissipation ..................... 21 10 Service .............................................................................. 23 10.1 Worldwide Service ........................................................ 23 10.2 US and Canada Service ................................................ 23 10.2.1 Service at a US or Canada Service Center .......... 23 10.2.2 Factory Service ................................................... 23 10.2.3 Factory Service Shipping Instructions ................ 23 11 Warranty ............................................................................. 24 Crown Factory Service Information Form ................................... 27

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