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                                       MC 250




   SERVICE INFORMATION
                     S T A R T I N G WITH S E R I A L N O .   23L48




MCINTOSH LABORATORY INC.       2 CHAMBERS STREET                 BINGHAMTON, NEW YORK
MC 250



                                  ELECTRICAL SPECIFICATIONS




         Power Output:
              100 watts RMS continuous, 50 watts per channel operating
              simultaneously, into 4 ohm, 8 ohm, or 16 ohm loads.

         Harmonic Distortion:

              Less than 0.25% at rated power output from 20Hz to 20,000Hz.


         Intermodulation Distortion:
              Less than 0.25% for any combination of frequencies between
              20 Hz and 20,000 Hz.

         Frequency Range:

              At rated output both channels:       +0 to -0.25dB from 20Hz
              through 20,000Hz.


         Output Damping Factor:

              Greater than 10 for any output tap.

         Input Sensitivity & Impedance:

              Input sensitivity is 0.5 volts.       Input impedance Is 200K ohms.


         Hum & Noise :
              Greater than 90dB below rated output.


         Power Requirements:

              117 volts AC,50-60Hz, 50 watts at zero signal output, 250
              watts at rated output.
MC 250
MC 250




          LEFT CHANNEL POWER OUTPUT PRINTED CIRCUIT BOARD 043-916




         RIGHT CHANNEL POWER OUTPUT PRINTED CIRCUIT BOARD 043-916



                     INPUT   SECTION   PRINTED   CIRCUIT   BOARD 043-795
MC 250
MC 250
                                                                                                                                          MC 250
                                                     SCHEMATIC NOTES


         1.    Unless otherwise s p e c i f i e d :               R e s i s t a n c e v a l u e s are i n ohms, 1 / 2 w a t t , and
               10% t o l e r a n c e ; c a p a c i t a n c e v a l u e s s m a l l e r than 1 are i n m i c r o f a r a d s ( 

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