McIntosh MA6500 free download

File name McIntosh-MA6500 amp.pdf

INTEGRATED AMPLIFIER WA T TS WA T TS . 02 . 20 2.0 -40 -30 - 20 D E C IB EL S 20 -10 20 0 0 40 0 . 02 . 20 2.0 -4 0 -30 - 20 D E C I B EL S 20 -10 20 0 0 40 0 POWER OUTPUT POWER OUTPUT POW ER GUARD B A SS T R EB L E LEFT R IG H T B A LA N C E L R V O LU M E CD 1 SE N S O R CD 2 TUN ER V ID E O P H / AU X TA P E HE ADPH ON ES MONO 1 S PE AK ER S 2 MU TE LOUD S TA N D B Y / O N CONTENTS Performance Specifications ... 2 Notes ... 3 Rear Panel ... 4 Section Location ... 4 Block Diagram ... 5 - 8 Interconnection Diagram ... 9 - 10 Input Driver Schematic and PCB ... 11 - 18 Heatsink Schematic and PCB ... 19 - 20 Lamp Schematic and PCB ... 19 - 20 PG Display Schematic and PCB ... 21 - 22 Control Schematic and PCB ... 21 - 22 Tone Schematic and PCB ... 23 - 26 Parts List ... 25 - 28 Exploded View and Parts List ... 29 - 31 Repacking Instructions ... 33 SERVICE MANUAL PREFORMANCE SPECIFICATIONS POWER OUTPUT, STEREO 250, 200, 120 watts minimum sine wave continuous average power output per channel, both channels operating, into a load impedance of 2, 4 and 8 ohms respectively. TOTAL HARMONIC DISTORTION 0.005% maximum at any power level from 250 milliwatts to rated power per channel from 20Hz to 20,000Hz, both channels operating. INTERMODULATION DISTORTION 0.005% maximum if instantaneous peak power output per channel does not exceed twice the rated output with both channels operating for any combination of frequencies from 20Hz to 20,000Hz. OUTPUT LOAD IMPEDANCE 2, 4 or 8 ohms RATED POWER BAND 20Hz to 20,000Hz DYNAMIC HEADROOM 2.4dB at 2, 4 or 8 ohms DAMPING FACTOR 60 at 2 ohms 120 at 4 ohms 230 at 8 ohms FREQUENCY RESPONSE +0, -0.5dB from 20Hz to 20,000Hz SIGNAL TO NOISE RATIO, (A WEIGHTED) Phono Input: 90dB (84dB IHF) below 10mV input High Level: 100db (90dB IHF) below rated output Power Amplifier: 110dB below rated output 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 INPUT IMPEDANCE Phono: 47k ohms, 65pF High Level: 22k ohms MAXIMUM INPUT SIGNAL Phono: 90mV High Level: 8V POWER REQUIREMENT 120V, 50/60Hz, 5.0 Amps UL/CSA 230V, 50/60Hz, 2.5 Amps PREAMPLIFIER MAXIMUM VOLTAGE OUTPUT Phono: 90mV 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 TONE CONTROLS Ba