McIntosh MQ102 Equalizer Service Information.pdf
IJ!( I n o MQ 102 ENVIRONMENTAL EQUALIZER SERVICE INFORMATION STARTING WITH SERIAL NO. 1W001 r MclNTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK MQ 102 ELECTRICAL SPECIFICATIONS FREQUENCY RESPONSE +0.5dB from 20Hz to 20,000Hz (with equalization switches i n position 1). DISTORTION Less than 0.1% at rated output level, 20Hz to 20,000Hz. HUM AND NOISE Less than 85dB below rated output (140pV). INPUT SENSITIVITY AND IMPEDANCE Main and tape input 2.5 volts at 75kn for rated output at 1000Hz. INPUT ATTENUATOR Switched OdB, -6dB, or - 12dB. OUTPUT Main: 2.5 volts into 47kn or greater load, 20Hz to 20,000Hz. Tape: 2.5 volts with rated input. LOW FREQUENCY EQUALIZATION 0 to +17dB at 20Hz in steps (0, +6, +10, +14, +17dB in positions 1, 2, 3, 4, 5 respectively.) POWER REQUIREMENT 120 volts, 50/60Hz, 4 watts MQ102 154-486 MQ 102 154-486 EQUALIZER PC BOARD 044-213 RIGHT MAIN OUTPUT SCHEMATIC NOTES 1. Unless otherwise specified: Resistance values are in ohms, 1/h watt, and 10% tolerance; capacitance values smaller than 1 are in microfarads (pF); capacitance values greater than 1 are in picofarads (pF). 2. Printed circuit board components are outlined on the schematics by dotted lines. The circles numbers around the dotted lines correspond to the numbers on the PC Board layouts. 3. The heavy lines on the schematics denote the primary signal path. 4. The terminal numbering of rotary switches is for ref erence only. 5. All voltages indicated on the schematics are measured under the following conditions: a. Use of an II megohm input impedance VTVM. b. All voltages +10% with respect to chassis ground. c. No signal at input or terminals. d. AC input at 117 volts, 50/60 Hz. 6. In units using power transformer 159-095, Si. rectifier D1 (McIntosh part number 070-031) is used. f MAIN INPUT E FT CHANNEL TAPE MON INPUT TAPE OUTPUT f MAIN INPUT RIGHT J CHANNEL I TAPE MON INPUT TAPE OUTPUT V- AC LINE TO OUTPUT AMPS MQ 102 BLOCK DIAGRAM MQ 102 LEFT MAIN OUTPUT MQ 102 BLOCK DIAGRAM MQ 102 REPLACEMENT PARTS All parts not listed are common items obtain able from radio parts jobbers. Replacement parts may be obtained when ordered by PART NUMBER from: McIntosh Laboratory, Inc. Customer Service Department 2 Chambers Street Binghamton, New York 13903 (telephone 607-723-3512) CAPACI TORS Cl Mylar .047pF 250V 064-085 C2 Mylar 068pF 250V 064-095 C3 Mylar . 1 5pF 250V 064-100 C4 My 1 a r . 22pF 064-096 C5 Tant. Elect. 3 3pF 35V 066-170 C7 My 1 ar 068pF 250 V 064-095 C8 Mylar 47pF 250V 064-069 C9 Mylar .IpF 250V 064-067 CIO Mylar . 047pF 250 V 064-085 Cl Tant. E1ect. 47pF 35V 066-167 C 1 2 Tant. Elect. IOuF 35V 066-239 C 1 3 Elect. 40pF 1 50V 066-169 Cl 4 Elect. 7 50pF 75V 066-168 C 1 5 Mylar .047pF 250V 064-085 C1 6 Mylar .068pF 250V 064-095 C 1 7 El ect. 3 3pF 35V 066-170 Cl 8 Mylar .1 5pF 250V 064-100 C1 9 Mylar . 22 pF 064-096 C20 Mylar 47pF 250V 064-069 C21 Myl ar . 1 pF 250V 064-067 C22 Mylar .047pF 250V 064-085 C 2 3 Myl ar .068pF 250V 064-095 C2 5 Tant. Elect. 47pF 35V 066-167 D 1 ODES D 1 S i Rec tifie r 070-031 TRANSISTORS Ql Si. PNP trans i stor 132-096 Q2 S i . NPN trans i stor 132-094 Q3 S i . PNP trans i s to r 132-096 Q4 Si. NPN transistor 132-094 SWITCHES SI Tape monitor 148-030 S2 Attenuator 148-029 S3,4 Equaliza tion switch 146-150 un crucuAT TRANSFORMERS Power transformer 159-095 MISCELLANEOUS ITEMS Owners manual 038-834 Shipping carton 033-133 Equalization knob 090-0!1 AC power cord 170-021 Audio cable 170-015 15C0923S7-M5924-3 PAPT m, nil nid
