User manual MCINTOSH MA2275

[. . . ] Tube Integrated Amplifier MA2275 Owner's Manual McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549 The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's 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. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. To prevent the risk of electric shock, do not remove cover or back. No user serviceable parts inside. IMPORTANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT. 1. [. . . ] 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 MA2275 into a cabinet, refer to the next page. Cool Air Figure 7 7 Installation in a Custom Cabinet The MA2275 can be placed upright on a table or shelf, standing on its four feet. It also can be custom installed in a piece of furniture or cabinet of your choice. The four feet may be removed from the bottom of the MA2275 when it is custom installed as outlined below. The four feet together with the mounting screws should be retained for possible future use if the MA2275 is removed from the custom installation and used free standing. Install MA2275 Front Panel the four supplied chassis Custom Cabinet Cutout spacers into the threaded openings on the bottom located next to the just removed four feet. The required panel cutout, ventilation cutout and unit dimensions are shown. Cabinet Always provide adFront equate ventilation for your Panel MA2275. Cool operation ensures the longest possible Opening for Ventilation operating life for any electronic instrument. Do not install the MA2275 directly above a heat generating component such as a high MA2275 Side View powered amplifier. If the in Custom Cabinet MA2275 is installed in a cabinet, a quiet running ventilation fan can be a definite asset in maintaining the coolest possible operating temperature. Support Shelf A custom cabinet installation should provide the following minimum spacing dimensions for cool operation. Allow at least 12 inches (30. 48cm) above the MA2275 Bottom View top, 2 inches (5. 08cm) bein Custom Cabinet low the bottom and 3 inches (7. 62cm) on each side of the amplifier, so that airflow is not obstructed. Allow 20 inches (50. 8cm) 2" depth behind the front 5. 08cm panel. Allow 1 inch (2. 54cm) in front of the mounting panel for knob clearance. Be sure to cut out a ventilation hole in the mounting shelf according to the dimensions in the drawing. 17-1/4" 43. 82cm 8-1/4" 20. 96cm Cutout Opening for Custom Mounting 12" 30. 48cm Cutout Opening for Ventilation 1-7/8" 4. 76cm Chassis Spacers 13-11/16" 34. 77cm Cutout Opening for Ventilation 9-3/16" 23. 34cm 10-5/16" 26. 19cm 13-1/8" 33. 34cm 8 Top Panel Connections and Tube Locations V3R KT88/ 6550 V2L KT88/ 6550 V1R 12AT7 V1L 12AT7 V2R KT88/ 6550 V3L KT88/ 6550 RIGHT Channel OUTPUTs connections for 2 ohm, 4 ohm and 8 ohm Loudspeakers V6 12AX7A V7 12AX7A V4 12AX7A LEFT Channel OUTPUTs connections for 2 ohm, 4 ohm and 8 ohm Loudspeakers V5 12AX7A 9 Rear Panel Connections External SENSOR or Keypad Jack permits the connection of a McIntosh IR Sensor or Keypad for remote operation JUMPER PLUGS connect the Preamplifier OUTPUTS PREAMP 1 Jacks to the POWER AMP IN Jacks and are needed for normal operation TAPE, DVD, TUNER, CD and CD2 INPUTS accept unbalanced high level program source signals Main Fuse holder, refer to information on the back panel of your MA2275 to determine the correct fuse size and rating POWER AMP IN inputs accept signals from a separate external preamplifier TAPE OUTPUTS provide the Record Out Signal PHONO Input accepts signals from a Moving Magnet Phono Cartridge Connect the MA2275 power cord to a live AC outlet. Refer to information on the back panel to determine the correct voltage POWER CONTROL ACC Output sends a turn-on signal to a McIntosh Source Component or Power Control unit when the MA2275 is turned on DATA PORTS send signals to McIntosh Compatible Components to allow control with the Remote Control CD balanced INPUTS accept high level program source signals POWER CONTROL MAIN Output sends a turn-on signal to an external McIntosh Power Amplifier when the MA2275 is turned on PREAMP OUTPUTS 1 and 2 supply the Preamplifier Output to either the internal or external power amplifier Ground connection for turntables 10 How to Connect Loudspeakers How to Connect Loudspeakers Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MA2275 Integrated Amplifier until after Connections have been made. 1. Prepare the Loudspeaker Hookup Cables that attach to the MA2275 by choosing one of the methods below: Bare wire cable ends: Carefully remove sufficient insulation from the cable ends, refer to figures 1, 2 & 3. If the cable is stranded, carefully twist the strands together as tightly as possible. Note: If desired, the twisted ends can be tinned with solder to keep the strands together, or attach spade lug and/or banana connector. Banana plug connection: Insert the banana plug into the hole at the top of the terminal. Tighten the top portion of the terminal post and the set screw to secure the banana plug in place. Note: The use of Banana Plugs is for use in the United States and Canada only. Refer to figures 7 and 8. Spade lug or prepared wire connection: Insert the spade lug connector or prepared section of the cable end into the terminal side access hole, and tighten the terminal cap until the cable is firmly clamped into the terminal so the wires cannot slip out. Connect the Loudspeaker hookup cables to the output terminals that match the impedance of the Loudspeaker, being careful to observe the correct polarities. [. . . ] Press the REC MON Push-button and listen to the tape playback of the just recorded program source selected. Note: The MA2275 TAPE OUTPUTS are not affected by the VOLUME or BALANCE controls. Figure 14 Note:For an explanation of the Remote Control Push-button functions, refer to pages 18 and 19. 16 Notes 17 Remote Control Push-Buttons LED illuminates during the time a remote command is sent to the MA2275 Turns AC Power ON or OFF to certain McIntosh Components when connected via the Data Port Selects Functions for McIntosh Home Controller and as a "shift" key when used with the AM or FM push-buttons to select Output (Spkr) 1 or 2 Switches OFF the entire MA2275 System Use to select tuner presets, disc tracks or any numbered operation Selects AM Tuner Operating Functions and Disc Selection on certain McIntosh CD Players Press to REVIEW Tuner Station Presets and selects certain functions on McIntosh CD Players Press to Power the MA2275 ON or OFF Press MODE to switch between Stereo or Mono Modes Press to Power ON the MA2275 Press to Power OFF the MA2275 Selects FM Tuner Operating Functions and Track Selection on certain McIntosh CD Players Adjusts the volume level up or down Selects On Screen Functions for McIntosh DVD Players and certain CD Players Mutes the audio Selects the FF (Fast Forward) or REWind Mode on Disc Player, Music Server or Tape Recorder; tunes Up or Down the AM/FM Dial Selects Disc Player, Music Server or Tape Recorder Functions and also performs various functions on a variety of McIntosh Components Selects one of the five High Level Audio Sources or the Phono Input Note: Push-buttons whose function is not indentified above are for use with other McIntosh Products. 18 How to Operate by Remote Control How to Operate by Remote Control The supplied Remote Control is capable of directly controlling the functions of contemporary McIntosh Source Components connected to the MA2275. Earlier McIntosh source components and other brand source components can be controlled by the MA2275 Remote Control with the addition of a McIntosh Remote Control Translator (RCT). Note: Your McIntosh Dealer can assist you with the installation and operation of the Remote Control Translator (RCT). move continuously from station to station. Press the +10 Push-button to start the automatic brief audition of each of the presets stored in the tuner memory. Press the +10 Push-button a second time to stop on a station preset and exit the review process. [. . . ]