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McIntosh service information

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This page contains scans of McIntosh service data.  Most of this data was in three loose-leaf binders donated by an anonymous benefactor.

Data is listed by model number in alphabetical order, with miscellaneous documentation at the end of the list.

"Schematic" is a schematic with little or no other info.  Some have voltage data on them.  

"Service data" is full info including specs, block diagrams, schematics, chassis photos, PCB pictorials, parts list, and (if appropriate) dial stringing info and alignment procedures.  

"Service manual" is pretty much the same data in a different format.

"Instruction manual" has installation and hookup information, and some have schematics and limited service data.

A116 audio amp schematic

AA2 audio analyzer service data

C8 preamp schematic

C11 preamp schematic

C20 preamp schematic

C22 preamp service data

C22 preamp schematic

C24 preamp service data

C24 preamp schematic

C26 preamp service data

C27 preamp service data

C28 preamp service data (early serial numbers)

C28 preamp service data (late serial numbers)

C32 preamp service data

MA5 schematic

MA6 schematic

MAC1500 receiver service manual

MAC1700 schematic

MC30 amplifier schematic

MC40 amplifier schematic

MC60 amplifier schematic

MC75 amplifier schematic

another MC75 schematic (courtesy of Bob Predaina)

MC225 amplifier schematic

MC240 amplifier schematic

MC250 service manual (courtesy of Mike Wald)

NEW 6/23/17 - Another MC250 service manual (courtesy of Mike Wald)

MC275 amplifier schematic

MC275 manual

MC1900 service manual (courtesy of Ray M)

MC2100 amplifier service data (courtesy of Lawrence Heim)

MC2100 owners manual (courtesy of Mike Wald)

MC2300 amplifier service manual (courtesy of Wolfgang, DF6ZC)

MC2300 owners manual (courtesy of Mike Wald)

MC2300 service manual (courtesy of Mike Wald)

MC3500 amplifier service manual (courtesy of Rick Chinn)

MC3500 amplifier service manual (courtesy of Rick Chinn)

MI2 performance indicator schematic

MI3 performance indicator service data

MI350 industrial power amplifier service data

ML1C loudspeaker service data

ML2C loudspeaker service data (early serial numbers)

ML2C loudspeaker service data (late serial numbers)

ML2M loudspeaker service data (early serial numbers)

ML2M loudspeaker service data (late serial numbers)

ML4C loudspeaker service data

ML4M loudspeaker service data

ML10C loudspeaker service data

MPI4 maximum performance indicator service data

MQ101 equalizer service data

MQ102 equalizer service data

MQ104 equalizer service data (early serial numbers)

MQ104 equalizer service data (late serial numbers)

MR55 instruction manual

MR65 tuner schematic

MR65B tuner schematic

MR66 tuner schematic

MR67 tuner schematic

MR67 tuner (with meter) schematic

MR67 tuner service manual

MR71 tuner service data

MR71 tuner service manual

MR73 tuner service data

MR74 tuner service data

MR77 tuner service data (early serial numbers)

MR77 tuner service data (late serial numbers)

MR78 tuner service data (early serial numbers)

MR78 tuner service data (late serial numbers)

MX110 tuner/preamp service manual

MX110 M-series schematic (courtesy of Larry)

MX112 tuner/preamp service data (early serial numbers)

MX112 tuner/preamp service data (early serial numbers)

MX113 tuner/preamp service data

MX114 tuner/preamp service data

MX115 tuner/preamp service data

Stereotech 1200 receiver service data

Stereotech 1 loudspeaker service data

Stereotech 2 loudspeaker service data

Stereotech 3 loudspeaker service data

Stereotech 4 loudspeaker service data

McIntosh service bulletins

McIntosh semiconductor data

McIntosh knob info

McIntosh replacement parts price list (1975)