McIntosh MC 2000 Service Manual
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Extracted text from McIntosh MC 2000 Service Manual (Ocr-read)
Page 1
PERFORMANCE SPECIFICATIONS 1. The heavy lines on the schematics 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 (10megaohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistors values are in ohms. b. Capacitor values are in microfarads (uF). c. Inductor values are in microhenries (uH).4. On PC Board Drawings, Square Pad Indicates: a. Polarized Capacitors - Positive b. Diode - 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 2 Power Output 130 watts into 8, 4 or 2 ohm loads is the minimum sine wave continuous average power output per channel from 20Hz to 20,000Hz with both channels operating. Total Harmonic Distortion 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power per channel from 20Hz to 20,000Hz with both channels operating. Intermodulation Distortion 0.5% maximum intermodulation distortion if instanta- neous peak power output does not exceed twice the output rating per channel with both channels operating, for any combination of frequencies from 20Hz to 20,000Hz. Rated Power Band 20Hz to 20,000Hz Frequency Response (at 1 watt) +0, -0.25dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 100,000Hz Hum and Noise (A-Weighted) 100dB below rated output Damping Factor Greater than 18 Output Load Impedance 2, 4 or 8 ohms Input Impedance 20k ohms Unbalanced (RCA Phono Jacks) 40k ohms Balanced (XLR Connectors)Input Sensitivity (Switch Selectable) 2.5 volts for rated output 1.2 volts for rated output (1 volt for 100 watts output) Tube Compliment 8 – KT88 or 6550 Output Tubes 4 – 12AX7A Input Tubes 2 – 12AT7 Driver Tubes Power Requirement 100 Volts, 50/60Hz at 5.8 Amps 120 Volts, 50/60Hz at 4.8 Amps 230 Volts, 50/60Hz at 2.5 Amps Note: Refer to the rear panel of the MC2000 for the correct voltage. Dimensions 17-3/4 inches (45.1cm) wide by 11 inches (27.9cm) high. Depth behind front panel is 18-3/4 inches (47.6 cm). Handle clearance required in front of the mounting panel is 1-5/8 inches (4.1 cm). Finish Stainless Steel Chassis with Titanium Gold Super Mirror Finish, Black Transformer Enclosures, Black Base, Glass Front Panel with gold plated Handles and Knobs Weight Amplifier - 135 pounds (61.2 kg) net, 144 pounds (65.3 kg) in shipping carton Accessories - 18 pounds (8.2 kg) in shipping carton
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MC2000 3 REAR PANEL