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POWER AMPLIFIER
CONTENTS
Performance Specifications ........................................ 2 Notes ......................................................................... 2 Rear Panel .................................................................. 3 Section Location ........................................................ 3 Block Diagram ........................................................... 4 Interconnection Diagram ...................................... 5 - 8 Multi-channel Schematic and PCB ............................. 9 Heatsink Schematic and PCB .............................. 10 - 12 Driver Schematic and PCB ................................. 13 - 15 Capacitor Schematic and PCB ........................... 15 - 16 Meter Schematic and PCB ................................. 17 - 21 Parts List ............................................................ 22 - 24 Exploded Views and Parts Lists .......................... 25 - 28 Repacking Instruction .............................................. 29
SERVICE MANUAL
PERFORMANCE SPECIFICATIONS
Power Output Minimum sine wave continuous average power output per channel, all channels operating is: 200 watts into 4 ohm load 120 watts into 8 ohm load Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is: 0.005% for 4 or 8 ohm loads Dynamic Headroom 1.6dB Frequency Response +0, -0.25dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 100,000Hz Sensitivity 1 volt A-Weighted Signal To Noise Ratio 92dB (113dB below rated output) Intermodulation Distortion Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with all channels operating is: 0.005% for 4 or 8 ohm loads Input Impedance 10,000 ohms Wide Band Damping Factor 100 at 4 ohms 200 at 8 ohms Power Requirements 100 Volts, 50/60Hz at 13.2 amps 110 Volts, 50/60Hz at 12.0 amps 120 Volts, 50/60Hz at 11.0 amps 220 Volts, 50/60Hz at 6.0 amps 230 Volts, 50/60Hz at 6.0 amps 240 Volts, 50/60Hz at 6.0 amps Note: Refer to the rear panel of the MC206 for the correct voltage. Dimensions Front Panel: 17-1/2 inches (44.45cm) wide, 7-1/8 inches (18.10cm) 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 57 pounds (25.9kg) net, 76 pounds (34.5kg) in shipping carton
NOTES
1. The heavy lines on the schematic denote the primary signal path. 2. Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions: a. AC input at 120 volts, 50/60Hz. b. All voltages are +/-10% with respect to ground. A high impedance (10 megaohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistor values are in ohms. b. Capacitor values are microfarads (uF). c. Inductor values are in microhenries (uH). 4. On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin 1
5.
WARNING
Parts marked with the symbol have critical characteristics. Use only replacement parts recommended by the manufacturer.
2
MC206
REAR PANEL
SECTION LOCATIONS
TOP VIEW WITH COVER REMOVED
3
BLOCK DIAGRAM
4
MC206
INTERCONNECT
5
6
7
8
2
MULTI-CHANNEL
048551B
3
A B C
HEATSINK
049552
9
10
11
12
4
A B C
MC206
DRIVER
049553
13
14
4
A B C
DRIVER
049553
5
CAPACITOR
049551
15
16
MC206
6
METER
049554
17
18
19
20
6
METER
049554
PARTS LIST
Reference No.
INTERCONNECT C1 D1 F1 M1 M2 M3 RT1 RT2 S1 S2 T1 TB1 TB2 TB3 TB4 TB5 TB6 TB7 049551B MULTI-CHANNEL PCB J1J2- J3- J4- J16- J18- J19J20- J21R9 R11 R12 049552 HEATSINK PCB C1 C2 C10 C11 C3 C15 C4 C7 C8 C12 C13 C9 C16 C17 C18 D1 D2 D3 D4 D5 D8 D9 D10 D11 D12 D6 D7 D13 D14 J1- J2J3J10 J11 Q1 Q12 Q5 Q14 Q2 Q13 Q3 Q18 Q4 Q17 Q6 Q16 Q7 Q15 Q8 Q10 Q21 Q22 Q25 Q26 Q9 Q11 Q19 Q20 Q23 Q24 R1 R8 R20 R27 R2 R9 R22 R24 R3 R10 R21 R25 R6 R11 R19 R26 R7 R23 R12 R18 R13 R28 R39 R40 R41 R42 R43 R44 R45 RT1 049553 DRIVER PCB C1 C15 C32 C33 C22 C44 C27 C28 C29 C30 C31 C39 C35 C36 C37 C38 C50 C51 C200 C40
Description
.22uF CAPACITOR BRIDGE RECTIFIER 15A 250V FUSE PANEL METER THERMISTOR METER SWITCH POWER SWITCH TRANSFORMER TERMINAL BLOCK SPEAKER TERMINAL CONN D 25-PIN CONN 4 PIN JACK MINI RES MF 100 1% 1/4W RES MF 1K 1% 1/4W CAP ELECT 47UF 35V CAP MONO .1UF 50V 20% Z5U CAP POLYPROP 0.15UF 10% 250VDC CAP MONO 100PF 100V 10% NPO CAP MONO .01UF 50V 20% X7R DIODE SILICON DIODE RECTIFIER CONN MALE 9 POS FRICTION LOCK CONN HEADER 2 PIN 0.156 CONN MALE 2 PIN TRANSISTOR NPN TRANSISTOR PNP TRANSISTOR NPN POWER TRANSISTOR PNP POWER TRANSISTOR NPN TRANSISTOR PNP TRANSISTOR PNP POWER TRANSISTOR NPN POWER RES MF 221 1% 1/4W RES MET OX 680 5% .5W RES MF 15K 1% 1/4W RES MET OX 1.8K 5% .5W RES MET OX 430 5% .5W RES MET OX 47 5% .5W POT TRIM 200 OHM 20% HORIZ AD RES MF 2.21 OHM 1/4W 1% RES WW DUAL .47 OHM 5% 5W THERMISTOR 100 CAP MONO .1UF 50V 20% Z5U CAP ELECT 100UF 25V CAP MONO 100PF 100V 10% NPO CAP ELECT 47UF 35V CAP ELECT 0.47UF 50V 20% CAP ELECT 10UF 100VDC CAP ELECT 220UF 50V 20%
Part No.
05200500 07013900 08904200 12406400 05200800 14625000 14624300 04898000 07409100 08412400 11750100 11721500 11749400 14419600 14409000 06644600 06130500 06436300 06130000 06130400 07004700 07013100 11724400 11740400 11721300 13222300 13222400 13226800 13226700 13226200 13226100 13223900 13223800 14417200 13709300 14441200 13709400 13709500 13709600 13439000 14437800 13919900 14427900 06130500 06644700 06130000 06644600 06624400 06646200 06625400
C47 C48 C55 IC1 J1 J5- J6J7J8- J9- J10J11K1 L1 L2 LD1 LD2 Q1 Q7 Q14 Q25 Q26 Q27 Q28 Q39 Q2 Q10 Q11 Q23 Q24 Q38 Q5 Q8 Q9 Q19 Q20 Q29 Q30 Q34 Q6 Q12 Q13 Q15 Q16 Q35 Q42 Q44 Q17 Q21 Q18 Q22 Q40 Q43 R1 R2 R19 R27 R29 R84 R94 R122 R20 R28 R30 R31 R37 R65 R66 R91 R22 R34 R45 R64 R83 R36 R97 R38 R89 R92 R101 R41 R55 R96 R98 R44 R49 R46 R47 R86 R48 R61 R67 R68 R123 R50 R87 R51 R53 R76 R99 R52 R75 R105 R108 R56 R60 R59 R62 R69 R93 R104 R77 R79 R80 R82 R113 R114 R119 R120 R118 R121 049551 CAPACITOR PCB C3 C4 C5 D1 IC1 J4- J16J5J8- J9- J10- J11- J12- J13J14 J15 J16 J17 J23 J22K1 Q1 R1 R2 R4 R10 R3 R5 R7 049554 METER PCB C7 C200 C201 C205 C206 C207 C208 C218 C9 C217 C11 C204 C215 C216 C219 C220
CAP POLYPROP .047UF 10% 250VDC CAP MONO .01UF 50V 20% X7R IC DUAL OPERATIONAL AMPLIFIER JACK PHONO GOLD PJ261G CONN MALE 9 POS FRICTION LOCK CONN 8 POS MALE FRICTION LOCK CONN HEADER 2 PIN 0.156 CONN 4 PIN RELAY 24VDC 5A 277VAC CHOKE OUTPUT .65UH LDR NETWORK VTL5C9 TRANSISTOR PNP TRANSISTOR PNP 120V TRANSISTOR NPN TRANSISTOR NPN TRANSISTOR NPN TRANSISTOR PNP TRANSISTOR PNP POT GAIN CONTROL 10K OHM RES MF 47.5K 1% 1/4W RES MF 681K 1% 1/4W RES MF 10K 1% 1/4W RES 511 1% 1/4W RES MF 1.21K 1% 1/4W RES MF 3.32K 1% 1/4W RES MF 1.1K 1% 1/4W RES MF 4.75K 1% 1/4W RES MF 100 1% 1/4W RES MF 14.7K 1% 1/4W RES MF 221 1% 1/4W RES MF 267K 1% 1/4W RES FP 22 OHM 1/4W 5% RES MF 2.21 OHM 1/4W 1% RES MF 22.1K 1% 1/4W RES CF 10 5% 1/2W RES MF 5.62OHM 1% 1/4W CAP ELECT 22UF 100V CAP M POLY .22UF 5% 63VDC CAP ELECT 10UF 50V DIODE RECTIFIER IC NAND SCHMIT 2-IN X 4 CONN 4 PIN CONN MALE 7 PIN CONN HEADER 2 PIN 0.156 BLADE FASTON 1/4 INCH CONN MALE 3 POS MTS100 NORMAL RELAY 48VDC TRIAC OPTOCOUPLER RES MF 1K 1% 1/4W RES MF 33.2K 1% 1/4W RES MF 1M 1/4W RES MF 100 1% 1/4W RES WW 1K 5W 10% CAP MONO .1UF 50V 20% Z5U CAP ELECT 3300UF 35V CAP ELECT 22UF 50V CAP ELECT 100UF 25V
06436400 06130400 13326000 11743600 11724400 11727500 11740400 11721500 08705700 12229700 14417900 13222400 13225500 13225400 13222300 13226200 13226100 13222400 13448600 14410800 14444300 14405300 14412300 14419100 14409500 14409100 14409700 14419600 14414900 14417200 14411800 13703300 14437800 14418700 14116500 14416800 06650600 06432900 06644500 07013100 13319200 11721500 11721700 11740400 11734200 11721400 08704900 13102400 14409000 14401500 14426900 14419600 13912100 06130500 06650900 06634500 06644700
C209 C210 C211 C212 C213 C214 D14 D46 D15 D16 D17 D18 D19 D20 D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 D32 D33 D34 D35 D36 D37 D38 D47 D48 D49 D40 D41 D42 D43 D44 D45 D50 D51 D52 D53 D54 D55 DS7 DS8 DS9 DS10 DS11 DS12 DS20 DS21 DS22 DS23 DS24 DS25 DS26 DS27 DS27 DS28 DS29 DS50 DS28 DS29 DS31 DS32 DS33 DS50 F1 IC1 IC2 IC3 IC4 IC5 IC6 IC20 IC21 IC22 J1- J2- J3J4J6- J8- J9- J17- J18J10- J11J12- J13- J14J16J18 J19 K1 Q8 Q10 Q11 Q12 Q13 Q14 Q15 Q22 Q25 Q35 Q57 Q58 Q59 Q60 Q61 Q62 Q32 Q33 Q34 Q36 Q37 Q38 Q39 Q40 Q41 Q50 Q51 Q52 Q53 Q54 Q55 Q56 R2 R3 R4 R5 R6 R7 R30 R98 R148 R166 R169 R172 R174 R181 R100 R101 R138 R149 R162 R163 R102 R106 R110 R114 R129 R144 R202 R103 R151 R164 R167 R170 R176 R104 R119 R132 R133 R135 R136 R105 R127 R137 R107 R108 R109 R118 R120 R122 R141 R111 R116 R134 R145 R160 R161 R192 R112 R117 R121 R124 R131 R140 R171 R115 R126 R128 R177 R178 R123 R146 R156 R195 R125 R130 R139 R142 R143 R194 R175 R199 R180 R185 R186 R187 R188 R193 R189 R190 R191 R197 R196 R200 R201 R203 R204 R205 R206 R198 R207 R208
CAP ELECT 2.2UF 50V DIODE RECTIFIER DIODE SILICON DIODE SILICON DIODE SILICON LED BAR RED DIODE ZENER 16V 5% 500MW DIODE SILICON LED AMBER LED RED HIGH EFFICIENCY LAMP 14V SOCKET LAMP 0.125 PINS .110 HI LAMP 14V HOLDER FUSE 5X20MM PCB MOUNT IC QUAD OPAMP NJM4741D IC QUAD ANALOG SW IC REGULATOR +5 VOLT IC REGULATOR -12V IC REGULATOR 12V CONN 8 POS MALE FRICTION LOCK CONN MALE 3 POS MTS100 NORMAL CONN 4 PIN CONN 13 POS HEADER 2 PIN .100 CONN MALE 5 PIN 0.1 POST ASSY BLADE FASTON 1/4 INCH RELAY 24VDC 5A 277VAC TRANSISTOR NPN TRANSISTOR PNP TRANSISTOR POWER N-CHN ENHANCE TRANSISTOR NPN TRANSISTOR NPN RES MF 681 1% 1/4W RES MF 681K 1% 1/4W RES MF 150K 1% 1/4W RES MF 20.0 1/4W RES MF 100K 1% 1/4W RES MF 5.62K OHM 1% 1/4W RES MF 15K 1% 1/4W RES MF 4.75M 1/4W 1% RES MF 3.32K 1% 1/4W RES MF 178K 1% 1/4W RES MF 10K 1% 1/4W RES 26.7K 1% 1/4W RES MF 221 1% 1/4W RES MF 90.9K 1% 1/4W RES MF 3.32K 1% 1/4W RES MF 10K 1% 1/4W RES MF 18.2K 1% 1/4W POT TRIMMER 5K OHM 20% RES MF 3.16K 1% 1/4W RES MF 7.5K 1% 1/4W RES MF 47.5K 1% 1/4W RES MF 12.1K 1% 1/4W RES MF 178K 1% 1/4W RES MF 5.11K 1% 1/4W RES MF 178K 1% 1/4W
06651100 07013100 07004700 07004700 07004700 05813900 07011400 07004700 05813300 05814800 05812000 17816200 05812000 17815900 13331200 13311700 13309300 13315500 13315600 11727500 11721400 11721500 11729800 11769000 11721600 11734200 08705700 13222300 13222400 13224200 13222300 13222300 14419500 14444300 14441900 14417400 14411300 14444700 14441200 14437900 14409500 14442000 14405300 14410500 14417200 14417000 14409500 14405300 14418100 13438700 14419900 14421000 14410800 14415400 14442000 14408300 14442000
21
22
23
24
MC206
MC206 EXPLODED VIEW
25
26
MC206 EXPLODED VIEW PARTS LIST
Ref No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
Part No.
016446 049319 104017 004801 018612 101042 094360 018588 101172 018587 094016 017855 092413 005001 021159 146243 146250 101054 094017 049554 112086 077031 102001 112051 124080 092341 092342 017447 114072 004798 101078 021094 004791 101163 106007 084135 104005 102045 070139 074091 102022 104004 104001 003855 100118 066480 049551 100188 048980
Description
GLASS KNOB ASSY WASHER FILT BLK 3/4 X1/4 X 1/16 BRACKET EXTRUSION END CAP 7" SCREW TS 4-40 X 1/2 SLOT FILLISTER TAPE FOAM 1/2 X 1/2 EXTRUSION BOTTOM SCREW TC 6-32 X 1/4 PH FL U/C EXTRUSION TOP TAPE FOAM 1/4 X 1/8 PLEXIGLAS ACETATE FILTER BLUE SUB PANEL BUSHING SWITCH POWER SWITCH (W/LOCKWASHER) METER SWITCH (W/LOCKWASHER) SCREW TAPTITE 6-32 X 1/4 PH PAN TAPE FOAM 1/4 X 1/4 METER PCB ASSY SPACER NYLON SLEEVING FIBERGLAS #2 NUT KEP 4-40 CADMIUM PLATE SPACER 1/8" NYLON METER FILTER AZURE BLUE FILTER PALE BLUE LIGHT BOX PLASTIC RIVET NYLON POP-IN TOP COVER SCREW TAP 8-32 X 5/16 PH PAN BLK SPACER #4 X 1/4 TRAY SCREW TC 8-32 X 1/4 PH PN TYPE F SPRING CLIP LATCH TYPE PAD THERMAL WASHER FLAT STEEL 6 X 3/8 X .032 NUT KEP 6-32 SPECIAL DIODE BRIDGE RECTIFIER TERMINAL BLOCK AC NUT MACH 4-40 X 3/16 X 1/16 WASHER LOCK 5 X .255 INT STAR WASHER FLAT STEEL 4 X 9/32 X .025 CLAMP CAPACITOR SCREW MACH 6-32 X 1/2 PH PN CAP ELECT CAPACITOR PCB ASSY SCREW MACH SEMS 10-32 X 3/8 TRANSFORMER ASSY 50 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 81 82 83 84 098113 018671 084183 112087 101202 101059 114119 114118 049552 049553 022185 112088 005156 078122 112032 104016 117487 084124 004800 104130 104148 110009 102020 112015 104142 101114 100271 101176 100120 104067 005175 017218 104080 100159 101109 DIAL CORD HEATSINK ISOSTRATE SPACER PCB 1/4" SCREW SM 6-20 X 3/4 PH PN TYPE B SCREW 6 X 5/8 PH PN TYPE A CLIP TRANSISTOR 214 CLIP TRANSISTOR 218 HEATSINK PCB ASSY DRIVER PCB ASSY SPACER #6 X 1/2 SUPPORT CIRCUIT BOARD REAR PANEL HOLDER FUSE SOCKET UL/CSA SPACER BLACK NYLON WASHER INT STAR .5 X .630 X .022 RECEPTACLE AC LINE POST DUAL BINDING PLATE OUTPUT WASHER LOCK #10 SPLT PHOS/BRNZ WASHER PLAT BRASS NUT M5 X 0.8 BRASS W/GOLD PLATE NUT MACH 6-32 SELF-LOCK STANDOFF WASHER LOCK 2.5mm INT STAR ZINC SCREW SM 4-24 X 1/2 PH PN TYPE A SCREW MACH SEMS 6-32 X 1/4 PH PN SCREW TC 6-32 X PH PN TYPE F SCREW MACH 10-32 X 1/4 PH PN ZINC WASHER LOCK #10 INT STAR CHASSIS FOOT PLASTIC BLACK WASHER FLAT #10 CLEAR ZINC SCREW 10-32 X 3/4 PH PN BLK SCREW TAP 6-32 X 5/16 PH PN BLK
27
28
MC206
REPACKING INSTRUCTION
29
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. Part Number 040818