1 Contents Introduction ................................................2 Important Safety Information...................3 Symbols ......................................................... 3 Electrical safety............................................. 4 Protection from fluids .................................. 4 Service warnings .......................................... 5 Protection from overheating ...................... 5 Lifting or moving ........................................... 6 Wiring to the loudspeaker terminals to Class 2 wiring (US wiring regulations) ....... 6 Output Current Limiting ..........................16 Output transistor protection...................... 17 Unusual output conditions.........................18 Power supply output current limiting .......18 Internal power supply protection..............18 Mains transient overload protection ........18 Input overload protection ..........................18 Amplifier inter-stage protection ................18 dm78 Specifications................................19 dm88 Specifications ...............................21 Care and Maintenance.......................... 24 Cleaning....................................................... 24 Additional Important Safety Instructions for US .......................................................... 7 Interference Warning - US FCC Regulations ................................................8 For Consumers within the European Union: ..........................................................9 Installation................................................. 10 Unpacking ....................................................10 Storing packaging .......................................10 Positioning ....................................................10 Troubleshooting...................................... 25 Service and Warranty Information ....... 26 Overview ..................................................... 26 Product warranty ....................................... 26 Exclusions to the warranty ....................... 26 Transferability.............................................. 27 Warranty verification .................................. 27 Warranty registration ................................. 27 If service is required ................................... 27 Transportation of products....................... 28 Freight damage claims.............................. 28 If you have moved ..................................... 28 Thank you for choosing Halcro!............... 28 Controls and Connections......................11 Connecting the loudspeakers ...................11 Connecting the external ground ...............11 Connecting the mains supply cable..........11 Break-in period.............................................11 dm78 Inputs .................................................12 dm88 Inputs.................................................13 Operation ................................................. 14 Electronic Protection and Reliability ..... 15 Components................................................15 2 Introduction Congratulations on purchasing the Halcro dm78 or dm88 monoblock amplifiers. Halcro designs and manufactures the only "Super Fidelity" amplifiers in the world. This "Super Fidelity" amplifier reproduces with better than 99.9997% purity of all tones across the entire audio range. The concept behind the electronic design was to create an amplifier that did not color the sound with its own electronic characteristics -- to recreate the original sound as it was at the time of recording. Please enjoy the Halcro audio experience. Halcro has enjoyed creating perfect audio reproduction for the world's music connoisseurs. If you desire to contact Halcro to give us feedback on your purchase or for general enquiries; Please feel free to contact us via: E-mail: admin@halcro.com Telephone: + 61 8 8238 0807 Facsimile: + 61 8 8238 0852 3 Important Safety Information Symbols The following symbols are used on this equipment: The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated `hazardous voltage' that may be of sufficient magnitude to constitute a risk of electric shock to a person if exposed or contacted. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the following pages. The `CE' symbol indicates compliance of this device with the relevant directives of the European community including the EMC (Electromagnetic Compatibility) and LVD (Low Voltage Directive) standards. Warning of electrical shock hazard. Do not open cover (or back). There are no user serviceable parts inside. Refer servicing to qualified service personnel. This symbol is to indicate that the unit is heavy and that precautions are required when lifting or moving the unit. 120lb 4 Electrical safety WARNING: This product must always be connected to a mains socket outlet with a protective earth connection. Only use a suitable approved mains cord complying with European individual country requirements in the CE Low Voltage Directive Scheme. The unit should be installed in a position where the mains plug is easily accessible. Disconnect the unit from the mains if it is to be left unused for a long period. WARNING: No naked flame sources, such as lighted candles, should be placed on the unit. If naked flame sources tip over they could result in a fire. DANGER: Do not open the cover or back, or remove any panels, or try to modify or repair the dm78/88. Opening the dm78/88 may expose you to dangerous voltages and will void the warranty. WARNING: The Standby/On mode switch does not disconnect the unit from the mains power. To disconnect the unit from the mains, switch off the unit at the mains socket outlet and withdraw the mains plug from the socket outlet. Protection from fluids The Halcro Logic dm78/88 units are designed for indoor use only and are not protected against liquids. They must not be exposed to dripping or splashing and no objects filled with liquids, such as vases, should be placed on them. If liquid is accidentally spilled on the device, immediately disconnect the unit from the mains. Allow sufficient time for complete evaporation before using the dm78/88 again. If the liquid is anything other than water, do not use the device before a qualified service technician has examined it. 5 Cleaning may be performed with a slightly damp cloth that has been wrung until nearly dry. Refer to the section on Cleaning on page 24. WARNING: To reduce the risk of fire or electric shock, do not expose this equipment to rain or moisture. Do not allow liquids to enter the unit or contact electrical terminals. DANGER: Always disconnect the unit from the mains before touching the loudspeaker terminals or replacing the fuse. Protection from overheating The dm78/88 generates a certain amount of heat and requires ventilation. Slots and ventilation holes are provided for ventilation purposes, and to ensure reliable operation of the product. To prevent fire hazards, these openings must never be blocked or covered. Follow the precautions listed below. If these precautions are not followed, overheating or failure may result. Overheating also shortens the working life of all components. · do not block the ventilation slots in the sides of the unit with any object, including paper, cloths or curtains avoid placing the unit in a built-in installation place such as a bookcase or a rack unless you can provide proper ventilation do not operate the unit inside a cabinet unless it has adequate ventilation (such as an open back panel) allow at least 12 in (300 mm) clearance around the unit Service warnings All compartments are sealed at the factory. If the seals are broken, the warranty will be void and all service costs will be charged to the owner. DANGER: Contains no user serviceable parts. Do not attempt to open any of the dm78/88 compartments as this may expose you to dangerous voltages and will void the warranty. Requires F 10 A L 250 V fuse for continued protection against the risk of fire. Never bypass or use any other type of fuse. The fuse is located on the bottom of the lower panel of the power amplifier (13). · · · WARNING: Always replace the fuse with the same type and rating as specified: F 10 A L 250 V. WARNING: Do not obstruct ventilation slots in the chassis. 6 Lifting or moving WARNING: Weighs 55 kg (120 lb) per unit. Shipping weight is 85 kg (187 lb). Never lift the amplifier by yourself. Wiring to the loudspeaker terminals to Class 2 wiring (US wiring regulations) This equipment has been classified as having a Class 2 loudspeaker output requiring wiring to connect the output terminals to class 2 according to the National Electrical Code. Consult a qualified installer or electrical contractor for further information. 120lb Always use two people to unpack or move the amplifier. Always bend at the knees when lifting. Do not strain your back. 7 Additional Important Safety Instructions for US The following instructions should be followed by customers in the USA in addition to the safety instructions in the rest of this chapter: o o o o o o o o o Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth or according to the cleaning instructions. Do not block any ventilation openings. Install in accordance manufacturer's instructions. with the o o o o Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. Only use attachments/accessories specified by the manufacturer. Unplug this apparatus during lightning storms or when unused for long periods of time. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as if the power-supply cord or plug is damaged, liquid has been spilled, or objects have fallen into the apparatus, if the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. . Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized 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. o 8 Interference Warning - US FCC Regulations This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: o o Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the amplifier is connected. Consult the dealer or an experienced radio/TV technician for help. Changes or modifications not expressly approved by Halcro could void the user's authority to operate the equipment. o 9 For Consumers within the European Union: The following instructions should be followed by customers in the EU in addition to the safety instructions in the rest of this chapter: o Do not dispose of this equipment in general household waste or unsorted municipal waste. The crossed out wheeled bin indicated on this equipment is an indicator that this unit should not be disposed of in general household waste, but recycled in compliance with local government regulations or environmental requirements. o Please dispose of this equipment via a recycling service or centre, or by returning the unit to the local Minelab/Halcro distributor. This will enable the equipment to be disposed of in an environmentally safe manner. o Disposal of unwanted waste electronic equipment in landfilled waste may contribute to adverse long term environmental effects due to the leaching of contaminating and/or toxic substances contained within some electronic equipment. 10 Installation Ensure you have read ...