McIntosh MX 134 Service Manual
This is the 36 pages manual for McIntosh MX 134 Service Manual.
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Extracted text from McIntosh MX 134 Service Manual (Ocr-read)
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PERFORMANCE SPECIFICATIONS FM Tuner Useable Sensitivity 14dBF which is 1.4uV across 75 ohms 50dB Quieting Sensitivity Mono: 19dBF which is 2.4uV across 75 ohms Stereo: 35dBF which is 15uV across 75 ohms Signal To Noise Ratio Mono: 75dB Stereo: 70dB Frequency Response Mono: +0, -1dB from 20 to 15,000Hz Stereo: +0, -1dB from 20 to 15,000Hz Harmonic Distortion Mono: 0.3% at 100Hz, 0.3% at 1,000Hz, 0.3% at 10,000Hz Stereo: 0.45% at 100Hz, 0.45% at 1,000Hz, 0.65% at 10,000Hz Intermodulaton Distortion Mono: 0.25% Stereo: 0.45% Capture Ratio 1.2dB Alternate Channel Selectivity 75dB Spurious Response 100dB Image Response 75dB RF Intermodulation 65dB Stereo Separation 45dB at 100Hz, 45dB at 1,000Hz, 35dB at 10,000Hz SCA Rejection 65dB AM Tuner Sensitivity 20uV external antenna input Signal To Noise Ratio 48dB at 30% modulation 58dB at 100% modulation Harmonic Distortion 0.5% maximum at 50% modulation Frequency Response 50Hz to 6kHz NRSC Adjacent Channel Selectivity 45dB minimum IHF Image Rejection 65dB minimum from 540 to 1600kHz IF Rejection 80dB minimum Audio Frequency Response Stereo: Left and Right Small speakers: 80Hz-20,000Hz Subwoofer: 20Hz-80Hz Left and Right Large speakers: 20Hz-20,000Hz Subwoofer: OFF Pro-Logic II: (Movie Processing Mode) Left, Center, Right, Small speakers: 80Hz-20,000Hz Surround Small speakers: 80Hz-7kHz Subwoofer: 20Hz-80Hz (Music Processing Mode) Left, Center, Right, Large speakers: 20Hz-20,000Hz Surround Large speakers: 20Hz-20,000Hz Subwoofer: OFF Dolby Digital and DTS: Left, Center, Right, Large speakers: 80Hz-20,000Hz Surround Large speakers: 20Hz-20,000Hz Subwoofer: OFF Left, Center, Right Large speakers: 20Hz-20,000Hz Surround Large speakers: 20Hz-20,000Hz Subwoofer: 20Hz-80Hz External Input Left, Center, Right, Left Surround, Right Surround: 20Hz-20,000Hz Subwoofer: 20Hz-20kHz (no LP filtering) Rated Output All Modes: 2.0Vrms for full bit digital input Input Impedance 22k ohms 2
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3 1. The heavy lines on the schematic denote the primary signal path. 2. Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions: a. AC input at 120 volts, 50/60Hz. b. All voltages are +/-10% with respect to ground. A high impedance (10 megaohm) voltmeter must be used.4. On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin 1 5.WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. NOTES Output Impedance 47 ohms at all outputs Maximum Output Voltage 9.5 Vrms Total Harmonic Distortion 0.005% at all outputs Sensitivity Analog Input: 400mV for 2.0V output Signal To Noise Ratio – All Outputs Greater than 90dB un-weighted. Greater than 100dB A weighted. Greater than 98dB CCIR. Maximum Input Signal Analog Input: 6Vrms Voltage Gain Analog Input to Output: 14Db Frequency Response +0, -0.5dB from 20Hz to 20,000Hz Tone Controls +12dB, -12dB from flat setting General Specifications Power Requirements 100 Volts, 50/60Hz at 65 watts 110 Volts, 50/60Hz at 65 watts 120 Volts, 50/60Hz at 65 watts 220 Volts, 50/60Hz at 65 watts 230 Volts, 50/60Hz at 65 watts 240 Volts, 50/60Hz at 65 watts NOTE: Refer to the rear panel of the MX134 for the correct voltage. Overall Dimensions Front Panel: 17-1/2 inches (44.5cm) wide, 7-5/8 inches (19.37cm) high. Depth behind front mounting panel is 21 inches (53.3cm) including clearance for connectors. Panel clearance required in front of mounting panel is 1-1/8 inches (2.9cm). Weight 32.5 pounds (14.8kg) net, 51.5 pounds (23.4kg) shipping weight PERFORMANCE SPECIFICATIONS cont MX134
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4 REAR PANEL SECTION LOCATIONS TOP VIEW WITH COVER REMOVED
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5456 55 INPUT 049621 SH 2 OF 2 7 INPUT 049621 7