User manual MCINTOSH MX110
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MCINTOSH MX110 SERVICE MANUAL (574 ko)
Manual abstract: user guide MCINTOSH MX110
Detailed instructions for use are in the User's Guide.
[. . . ] STEREO TUNER PREAMPLIFIER
MX 11O
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GENERAL DESCRIPTION TECHNICAL DESCRIPTION FRONT PANEL FACILITIES INSTALLATION CONNECTING AC Connections AC Power Connection Input Connections Output Connections Antenna Connections
CONTENTS
OPERATING INSTRUCTIONS Balancing a Stereo System
Adjusting Phase
Balancing Loudness Between Program Sources Adjusting the Balance Control After the System has been Balanced Adjusting for Special Effects Listening to Monophonic FM Program Listening to MPX Stereo Listening to a Stereo Record Listening to Monophonic Records Listening to Tape Decks Listening to Stereo Tape Machine Operating Curves GUARANTEE
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OWNER'S
MANUAL
MX11O
MX110 TUNER PREAMPLIFIER
GENERAL DESCRIPTION The MX110 combines in one unit an extremely low-distortion preamplifier with a highly sensitive FM multiplex stereo tuner. Every desirable feature of a tuner and a preamplifier is included in this design. Interstation noise suppression, tuning indicator, FM multiplex indicator, individual channel bass controls, individual channel treble controls, electronic phase switch have all been engineered into the MX110. The INPUT SELECTOR gives you a choice of six different program sources. [. . . ] The level controls can be set so that the output levels of all program sources are equal. The MX110 LEVEL SET controls are located on top of the MX110 chassis behind the front panel.
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INSTALLATION The MX 110 can be installed in conventional furniture cabinets, custom built installations or professional relay racks. If the unit is to be placed on a shelf or table-top, it is recommended that it be housed in a Mclntosh cabinet. To support the weight of the MX110, the wood panel used to mount it should be at least ¼ inch thick. The MX 110 installation should allow l3½ inches behind the front panel which includes 1½ inches for connectors. The desirable width and height of the installation are 16 inches and a minimum of 5½ inches, respectively, so that sufficient space is allowed for the circulation of air. The front panel mounting space width and height are 16 inches and 53/8 inches, respectively. Allow at least 1½ inches for knob clearance in a custom built installation.
CONNECTING
AC CONNECTIONS
There are three AC outlets on the rear panel of the MX110. (See Figure 17. 1 These receptacles have a maximum rating of 350 watts total. The power to the two black receptacles is controlled by the POWER switch on the front panel. The red receptacle is used for powering a turntable or record changer. The receptacle is not switched so that the turntable power will not be turned off while
the turntable idler wheel engaged. The turntable is protected by this arrangement because it is necessary to turn off the turntable with its own control switch so that no damage will result to the drive system.
AC POWER
Plug the AC power cord in 105 volt to 125 volt, 50 to 60 cycle power line. AC Connections.
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INPUT CONNECTIONS The MX110 provides six separate program inputs controlled by the INPUT SELECTOR switch. One input for tape monitor or
tape comparison is controlled by the TAPE MONITOR switch. The input program connections should be made in accordance with Table 1.
Figure 18. MX110 Input Connections (Back Panel).
If a cartridge requires less than 47, 000 ohms load impedance, a resistor can be added across the terminals of the cartridge Desired Impedance 47, 000 ohms (47K) 37, 000 ohms (37K) 27, 000 ohms (27K) 15, 000 ohms (15K) 6, 800 ohms (6. 8K)
to achieve the correct termination. The following chart may be used as a guide: Resistor Across Input No Resistor 180, 000 ohms (180K) 62, 000 ohms (62K) 22, 000ohrns (22K) 8, 200 ohms (8. 2K)
Table 1. Input Connections
CONNECTION TAPE MONITOR
AUX
FUNCTION Tape input operates with tape machines containing their own playback preamplifier. The auxiliary input accepts any auxiliary service requiring flat frequency response, such as a T. V. set, etc.
INPUT SENSITIVITY 0. 3 volts 0. 3 volts
INPUT IMPEDANCE 100, 000 ohms (100K) 200, 000 ohms (200K) 220, 000 ohms (220K) 47, 000 ohms (47K)
TAPE HEAD
PH-1 MAG & PH-2 MAG.
This jack is used with a tape deck that does not contain its own 2. 5 millivolts playback preamplifier. (25/1000 of 1 volt) These jacks are to be used with magnetic cartridges. [. . . ] Set the BASS controls and TREBLE controls so that the indicator is centered between the panel markings · L and ° R. LISTENING TO TAPE DECKS
If you are tuning the MX110 and the red MPX indicating light comes on, this indicates a multiplex broadcast. LISTENING TO A STEREO RECORD To listen to stereo records, proceed as follows: 1. Turn the INPUT SELECTOR to PHONO 1 or PHONO 2, whichever is connected to the cartridge you wish to hear. [. . . ]
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