McIntosh C 22 free download

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C 22 SERVICE INFORMATION STARTING WITH SERIAL NO. 10A01 C 22 M c l N T O S H L A B O R A T O R Y INC. 2 CHAMBERS STREET BINGHAMTON, NEW Y O R K ELECTRICAL SPECIFICATIONS Frequency Response +0.5 to -0.5 dB, 20Hz to 20,000Hz Distortion Less than 0.2% at 10 volts output Less than 0.02% at 3 volts output Input Sensitivity (phono 1, phono 2, tape head) 2 millivolts for 2.5 volts output at 1kHz Input Sensitivity (Microphone) 2.5 millivolts for 2.5 volts output Input Sensitivity (aux, tape, tuner) 0.25 volts for 2.5 volts output Hum And Noise (phono 1, phono 2, tape head) 74 dB below 10 millivolts input Hum And Noise (aux, tape, tuner) 85 dB below rated output Output (main) 2.5 volts with rated input. Up to 10 volts can be developed without distortion. Output (tape) 0.25 volts with rated input. Phono input signal of 10 millivolts produces 1.25 volts output. Output (L & R) 1.0 volts with rated input on both channels. A level control adjusts output. Bass Control +20 dB at 20Hz Treble Control +20 dB at 20,000Hz LP Filter Flat or sharp cutoff below 50Hz (down 30 dB @ 20Hz). HF Filter Flat or sharp cutoff above 5000Hz (down 30 dB @ 20,000Hz). Unless otherwise specified, resistance values are in ohms, 1/2 watt, and 10% tolerance. Capacitance values smaller than 1 are in microfarads (µF); values greater than 1 are in picofarads (pF). Resistors marked with * are 1/4W. The terminal numbering of rotary switches and printed circuit board wires is for reference only. All voltages are measured under the following conditions: 1. Use of an 11 megohm input impedance VTVM 2. All voltages ±10% with respect to ground 3. AC input at 117 volts, 50/60 cycles 4. No signal at input terminals 5. Front panel controls at normal positions PREAMP. SECTION 154 - 318 SCHEMATIC NOTES 1. In early units C3 & 4 were 50µF. 2. C22's built before 1965 used circuit modules made by Erie Electronics. In 1965, we changed to Sprague Electric Co. The Sprague modules are electrically equivalent to the Erie modules but differ mechanically. The newer Sprague modules are used for replacement when servicing early C22 units. For data on replacing the old Erie modules with the Sprague modules, refer to Mclntosh Service Bulletin #108. In early units R76 thru R83 do not appear. In early units C35 & 36 do not appear. In early units R67 was 50 ohms. 3. 4. 5. POWER SUPPLY 154-317 R E P L A C E M E N T PARTS All parts not listed are common items obtainable from radio parts jobbers. Replacement parts may be obtained when ordered by PART NUMBER from: Mclntosh Laboratory Inc. Customer Service Department 2 Chambers Street Binghamton, New York 13903 (telephone 607-723-3512) CAPACITORS Symbol Number C3,4 C29 C30 C31 C32 Description Elect. Elect. Elect. Elect. Elect. 100 4µ 0F µF 3V 200V Part Number 066-047 066-049 25/200/35o/35ov 50/50/50 µF 350/350/300V 1200/1200µF 30/30V DIODES 1000/40/20 /20µF 066-037 066-033 066-029 D1,2 D3,4 D5,6 Se. rectifier Si. rectifier Si. rectifier PUSES 070-005 070-01