User manual MCINTOSH MC202 SERVICE MANUAL

[. . . ] POWER AMPLIFIER CONTENTS Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 19 - 20 Exploded View and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 - 24 Repacking Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 SERVICE MANUAL PERFORMANCE SPECIFICATIONS Power Output Stereo 200 watts into 2, 4 or 8 ohm loads is the minimum sine wave continuous average power output per channel with both channels operating. Power Output Mono Bridged 400 watts into 4, 8 or 16 ohm loads is the minimum sine wave continuous average power output. Output Load Impedance Stereo - 2, 4 or 8 ohms Mono - 4, 8 or 16 ohms Rated Power Band 20Hz to 20, 000Hz Dynamic Headroom 1. 9dB Frequency Response +0, -0. 25dB from 20Hz to 20, 000Hz +0, -3dB from 10Hz to 100, 000Hz Total Harmonic Distortion 0. 005% maximum at any power level from 250 milliwatts to rated power per channel from 20Hz to 20, 000Hz, all channels operating. Intermodulation Distortion 0. 005% maximum if instantaneous peak output per channel does not exceed twice the rated output with all channels operating for any combination of frequencies from 20Hz to 20, 000Hz. Signal To Noise Ratio (A Weighted) 110dB below rated output Sensitivity 1. 7 Volts Unbalanced Input 3. 4 Volts Balanced Input Input Impedance 10, 000 ohms Unbalanced and Balanced Wide Band Damping Factor Greater than 40 Power Requirements 100 Volts, 50/60Hz at 4. 8 amps 110 Volts, 50/60Hz at 4. 4 amps 120 Volts, 50/60Hz at 4. 0 amps 220 Volts, 50/60Hz at 2. 0 amps 230 Volts, 50/60Hz at 2. 0 amps 240 Volts, 50/60Hz at 2. 0 amps Note: Refer to the rear panel of the MC202 for the correct voltage. Dimensions Front Panel: 17-1/2 inches (44. 45cm) wide, 5-7/16 inches (13. 81cm) high. Depth behind front mounting panel is 18 inches (45. 72cm). Clearance required in front of the Front Panel is 1 inch (2. 54cm) for knobs. Weight 65 pounds (29. 49 kg) net, 83 pounds (37. 65 kg) in shipping carton. NOTES 1. The heavy notes on the schematic denote the primary signal path. Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions: a. All voltages are +/-10% with respect to ground. A high impedance (10 megaohm) voltmeter must be used. Inductor values are in microhenries (uH). On PC board drawings, Square pad indicates: a. [. . . ] 016411 049320 104017 018611 101042 004810 094360 018588 101172 018587 017363 017711 004804 112092 049354 022315 114072 101054 112086 102001 004805 146243 124077 092341 092342 017447 004809 101078 005023 078003 106007 112038 112104 049352 112102 049350 049349 005024 017218 104063 100159 104067 100120 101176 074091 104001 104004 102022 084135 070139 Description GLASS PANEL KNOB ASSEMBLY BLK FELT WASHER 5" ENDCAP TS 4-40 X 1/2 SLOT FILLISTER EXTRUSION BRACKET 5" FOAM TAPE 1/2 X 1/2 BOTTOM EXTRUSION TCS 6-32 X 1/4 PHIL FLAT U/C TOP EXTRUSION PLEXIGLAS FILTER LIGHT BLUE DISPLAY PLEXIGLAS SUBPANEL REVERSE LOCKING PCB SUPPORT LAMP PCB ASSY FISHPAPER SHIELD PLASTIC RIVET TS 6-32 X 1/4 PH PAN TAPTITE BLK NYLON SPACER KEP NUT 4-40 CADMIUM PLATE SWITCH BRACKET POWER SWITCH METER FILTER AZURE BLUE FILTER PALE BLUE PLASTIC LIGHT BOX TOP COVER TS 8-32 X 5/16 PHIL PAN BLK TRAY RUBBER GROMMET SPRING CLIP: LATCH TYPE STL SPACER 4 X 3/8 NICKEL PLT BOARD MOUNT POWER SUPPLY METER PCB ASSY MOUNTING STRAPS OUTPUT TRANSFORMER POWER TRANSFORMER CHASSIS PLASTIC FEET-BLACK FLAT WASHER #10 CLEAR ZINC MS 10-32 X 3/4 PHIL PAN BLK ZINC LK WASH: INTERNAL STAR #10 MS 10-32 X 1/4 PHIL PAN ZINC TCS 6-32 X 1/2 PH PAN BLK TYPE F AC TERMINAL BLOCK FLAT STEEL WASHER #4 X 9/32 X . 025 LK WASHER 5 X . 255 INT STAR MN 4-40 3/16 X 3/16 THERMAL PAD RECTIFIER BRIDGE 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 102003 112103 049353 104005 100255 018617 017160 084187 112087 049346 101059 114118 114119 110009 104130 104148 084189 084124 102020 178161 104016 004800 005022 117487 101197 101114 017706 094332 078017 104142 MACH NUT 6-32 W/LOCK HEX SPACER 6-32 X 2. 375 DRIVER PCB ASSY STEEL WASHER: FLAT 6 X 3/8 X . 032 SEMS 6-32 X 3/8 PHIL PAN INTERNAL AMPLIFIER HEATSINK MOUNTING TAB W/ . 140 DIA MTG ISOSTRATE PCB SPACER 1/4" HEATSINK PCB ASSY SM 6 X 5/8 PHIL PAN TYPE A TRANSISTOR CLIP 218 TRANSISTOR CLIP 214 NUT M5 X 0. 8 BRASS WITH GOLD PLATE LK #10 SPLIT PHOS/BRONZE FLAT WASHER BRASS DUAL BINDING POST RED DUAL BINDING POST MACH NUT 6-32 SELF-LOCK FUSE HOLDER 5 X 20mm IEC LK WASH: 1/2 X . 630 X . 022 INT STAR OUTPUT PLATE REAR PANEL AC LINE RECEPTACLE HI/LO 4-24 X 3/8 PHIL ROUND BLACK SM 4-24 X 1/2 PHIL PAN TYPE A TERMINAL COVER DOUBLE COATED MTG TAPE 1/8" THICK GROMMET 3/4 X 9/16 LOCKWASHER 2. 5mm INT STAR ZINC 23 24 REPACKING INSTRUCTIONS 25 POWER AMPLIFIER SERVICE MANUAL The continuous improvement of it's products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design without notice. Because of the constant upgrading of McIntosh products' circuitry and components, the Company cannot insure, and does not warrant, the accuracy of the within schematic material, which is intended for information only. McINTOSH LABORATORY, INC. , 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903 Printed in U. S. A. [. . . ]