McIntosh MA6900 free download

File name McIntosh-MA6900 amp.pdf

INTEGRATED AMPLIFIER CONTENTS Performance Specifications ... 2 Notes ... 2 Rear Panel ... 3 Section Location ... 4 Block Diagram ... 5 - 6 Interconnection Diagram ... 7 - 8 Main Schematic and PCB ... 9 - 18 Balanced Schematic and PCB ... 12, 18 Heatsink Schematic and PCB ... 19 - 20 Capacitor Schematic and PCB ... 21 - 22 Control Schematic and PCB ... 23 - 26 Lamp Schematic and PCB ... 25 - 26 Tone Schematic and PCB ... 27 - 31 Keyboard Schematic and PCB ... 30 - 32 Parts List ... 33 - 36 Exploded Views and Parts Lists ... 37 - 40 Repacking Instruction ... 41 SERVICE MANUAL PERFORMANCE SPECIFICATIONS Power Output Minimum sine wave continuous average power output per channel, all channels operating is: 200 watts into 2 ohm load 200 watts into 4 ohm load 200 watts into 8 ohm load Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is: 0.005% for 2, 4 or 8 ohm loads Dynamic Headroom 2.4dB Frequency Response +0, -0.5dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 100,000Hz Sensitivity Phono, 2.5mV for 2.5V rated output (0.5mV IHF) High Level, 250mV for 2.5V rated output (50mV IHF) Power Amplifier Input, 2.5V for rated output Signal To Noise Ratio (A Weighted) 90dB (84dB IHF) below 10mV input, Phono Input 100dB (90dB IHF) below rated output, High Level 110dB below rated output, Power Amplifier Intermodulation Distortion Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with all channels operating is: 0.005% for 2, 4 or 8 ohm loads Input Impedance Phono, 47k ohms, 65pF High Level, 22k ohms Maximum Input Signal Phono, 90mV High Level, 8V Preamplifier Maximum Voltage Output Phono, 8V at tape output High Level, 8V at tape output Main Out, 8V at preamp output Voltage Gain High Level to Tape: 0dB High Level to Main: 20dB Wide Band Damping Factor Greater than 40 Power Requirements 100 Volts, ~ 50/60Hz at 4.8 amps 110 Volts, ~ 50/60Hz at 4.4 amps 120 Volts, ~ 50/60Hz at 4.2 amps 220 Volts, ~ 50/60Hz at 2.0 amps 230 Volts, ~ 50/60Hz at 2.0 amps 240 Volts, ~ 50/60Hz at 2.0 amps Note: Refer to the rear panel of the MA6900 for the correct voltage. Overall Dimensions Front Panel: 17-1/2 inches (44