User manual MCINTOSH MC2102 VACUUM TUBE POWER AMPLIFIER

[. . . ] Owners Manual MC2102 Power Amplifier MC2102 McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549 IMPORTANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT. The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. 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 literature accompanying the appliance. WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. To prevent the risk of electric shock, do not remove cover or back. No user serviceable parts inside. NO USER-SERVICEABLE PARTS INSIDE. [. . . ] To protect the Vacuum Tubes from possible shipping damage, they are packed in four layers of foam and placed into the Tube Cover. It is secured to the MC2102 Chassis. Note: Gloves or a soft cloth will prevent fingerprinting of the Tubes during their installation. Tube Cover 1. Using an appropriate screwdriver, rotate the two Tube Cover Screws counterclockwise, for approximately five turns, until the Tube Cover can be removed from the MC2102 Chassis and the screws are still attached to the cover. On the top left side of the amplifier, locate the Tube Socket that has the nomenclature V3L 12AT7A next to it on the chassis. Repeat the steps 6-9 for the remaining three 12AT7 Tubes. Caution: To prevent electrical shock make sure that the MC2102 Tube Cover is installed before connecting the AC Power Cord. KT88/6550 12AX7A 12AX7A 12AT7 Figure 5 12AT7 Tube Cover Fastening Screw Locations Before operating the MC2102, locate the previously removed Tube Cover and perform the following steps: Installing the Tube Cover: 1. The Tube Cover has a wide opening along one side of its longer dimension. Carefully place the Tube Cover onto the MC2102 while at the same time aligning the screws with the openings on the MC2102 Chassis. Using an appropriate screwdriver secure the Tube cover to the chassis, approximately five turns, do not over tighten the screws. Tube Cover Figure 6 Warm Air Location and Ventilation Adequate ventilation extends the trouble free life of the MC2102. The suggested minimum space for operating the MC2102 is 24 inches (60. 96cm) in width, 22 inches (55. 88cm) depth, and 22. 5 inches (57. 15cm) in height. Always allow air to flow through the ventilation holes on the bottom of the amplifier and a means for the warm air to escape at the top, refer to figure 7. For installation of the MC2102 into a cabinet, refer to the next page. Cool Air Figure 7 7 Installation in a Custom Cabinet 1 inch (2. 54cm) in front of the mounting panel for knob The MC2102 can be placed upright on a table or shelf, standing on its four feet. Be sure to cut out a ventilation hole in the mounting shelf according to the dimensions in the drawing. The four feet may be removed from the bottom of the MC2102 17-1/4" when it is custom installed 43. 82cm as outlined below. The four feet together with the mounting screws should be retained for possible future use if the MC2102 is re8-1/4" moved from the custom in20. 96cm MC2102 Front Panel stallation and used free standing. The required panel Custom Cabinet Cutout cutout, ventilation cutout and unit dimensions are shown. Cool operation Cutout Opening for Custom Mounting ensures the longest possible 12" Cabinet operating life for any elec30. 48cm Front tronic instrument. Do not Panel install the MC2102 directly above a heat generating component such as a high Opening for Ventilation powered amplifier. If the MC2102 is installed in a cabinet, a quiet running ventilation fan can be a definite asset in maintaining the MC2102 Side View coolest possible operating in Custom Cabinet temperature. A custom cabinet installation should provide the following minimum spacing Cutout Opening for Ventilation dimensions for cool operation. Allow at least 12 Support 1-7/8" inches (30. 48cm) above the Shelf 4. 76cm top, 2 inches (3. 81cm) below the bottom and 3 inch (7. 62cm) on each side of the amplifier, so that airflow is 13-11/16" not obstructed. Allow 22 34. 77cm inches (55. 88cm) depth be- MC2102 Bottom View 9-3/16" in Custom Cabinet hind the front panel. Allow Cutout Opening 23. 34cm for Ventilation 8 MC2102 Top Rear Panel Connections and Switchs Main Fuse holder, refer to information on the back panel of your MC2102 to determine the correct fuse size and rating MODE switch selects STEREO, PARALLEL or BRIDGE MONO Modes of operation MODE switch selects between the BALANCED or UNBALANCED INPUTS UNBALANCED INPUTS for audio cables from a preamplifier or control center audio outputs Connect the MC2102 power cord to a live AC outlet. [. . . ] Rotate the MC2102 POWER SWITCH to the OFF Position and connect the supplied power cord to an active AC outlet. Cable Openings Terminal Connections Cover Cover Mounting Screw Locations 14 Figure 14 How to Connect for Mono Bridge McIntosh C200C Controller McIntosh C200P Preamplifier To AC Outlet 4 ohm Loudspeaker H7vqtrCx8rpv T r hxr D rq h pr T rh xrIr th vr 8 r pv Gr s P ! u 8 r p v # u ' u Gr s P # u 8 r p v S vtu P # u 8 r p v % u Gr s P ' u 8 r p v S vtu P ' u 8 r p v 15 Front Panel Displays and Controls METER indicates the Left Channel Power Output of the amplifier METER indicates the Right Channel Power Output of the amplifier Remote On Indicator lights when the amplifier is in the Remote Turn-On Mode METER Switch selects the display modes of the Power Output Meters POWER Switch Turns AC Power Off, Remote or On 16 How to Operate the MC2102 How to Operate the MC2102 Power On To have the MC2102 automatically turn On or Off when a McIntosh Control Center turns On or Off, rotate the power switch to the REMOTE Position. For manual operation, rotate the power switch to the ON or OFF Position as desired. Mode Switchs The STEREO/PARALLEL/BRIDGE MONO Mode Switch, which is located on the Top Rear Panel of the MC2102, allows you to select either STEREO, MONO PARALLEL or MONO BRIDGE Modes of Operation. [. . . ]