McIntosh MC-2102 Service manual

Page 1
PO WER AMPLIFIER
CONTENTS
Performance Specifications ........................................ 2
Notes ......................................................................... 2
Rear Panel .................................................................. 3
Section Location ........................................................ 4
Block Diagram ...................................................... 5 - 6
Interconnection Diagram ...................................... 7 - 8
Input Schematic and PCB.................................... 9 - 10
Daughter Schematic and PCB............................. 11 - 13
Amplifier Schematic and PCB ....................... 11 - 12, 14
SERVICE MANUAL
Output Schematic and PCB............................... 17 - 18
Remote Switch Schematic and PCB ................... 19 - 20
Panel Lamp A Schematic and PCB..................... 19 - 20
Panel Lamp B Schematic and PCB ............................ 21
Meter A & B Schematic and PCB .............................. 22
Parts List ............................................................ 23 - 26
Exploded Views and Parts Lists .......................... 27 - 32
Repacking Instruction .............................................. 33
Page 2
PERFORMANCE SPECIFICATIONS
Power Output
Minimum sine wave continuous average power output per channel, both channels operating is: 100 watts into 2 ohm load 100 watts into 4 ohm load
100 watts into 8 ohm load
Power Output Mono Parallel
Miniumum sine wave continuous average power output is: 200 watts into 1 ohm, 2 ohm or 4 ohm load
Power Output Mono Bridge
Miniumum sine wave continuous average power output is: 200 watts into 4 ohm, 8 ohm or 16 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:
0.5% for 2, 4 or 8 ohm loads (Stereo)
0.5% for 1, 2 or 4 ohm loads (Mono Parallel)
0.5% for 4, 8 or 16 ohm loads (Mono Bridge)
Frequency Response
+0, -0.25dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 70,000Hz
Sensitivity
2.5 Volts Unbalanced Input 5 Volts Balanced Input
A-Weighted Signal T o Noise Ratio
100dB
Intermodulation Distortion
Maximum Intermodulation Distortion if instantaneous peak output does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz is:
0.5% for 2, 4 or 8 ohm loads (Stereo)
0.5% for 1, 2 or 4 ohm loads (Mono Parallel)
0.5% for 4, 8 or 16 ohm loads (Mono Bridge)
Input Impedance
20,000 ohms Unbalanced Inputs 40,000 ohms Balanced Inputs
Wide Band Damping Factor
Greater than 18
Power Requirements
100 Volts ~ , 50/60Hz at 6.0 amps 110 Volts ~ , 50/60Hz at 5.5 amps 120 Volts ~ , 50/60Hz at 5.0 amps 220 Volts ~ , 50/60Hz at 2.5 amps 230 Volts ~ , 50/60Hz at 2.5 amps 240 Volts ~ , 50/60Hz at 2.5 amps
Note: Refer to the rear panel of the MC2102 for the correct
voltage.
Dimensions
Front Panel: 17-3/4 inches (45.08cm) wide, 10-1/8 inches (25.72cm) high. Depth behind front mounting panel is 16 inches (40.64cm). Clearance required in front of the Front
Panel is 1 inches (2.54cm) for knobs.
Weight
88 pounds (40kg) net, 121 pounds (54.9kg) in shipping carton
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).
NO TES
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
Page 3
TOP AND REAR PANEL
MC2102
3
Page 4
SECTION LOCATIONS
BOTTOM VIEW WITH COVER REMOVED
4
Page 5
BLOCK DIAGRAM
MC2102
5
6
Page 6
1
INTERCONNECT
7
8
Page 7
MC2102
2
INPUT
049508
9
Page 8
2
INPUT
049508
10
Page 9
MC2102
3L
3R
DAUGHTER
049507
4L 4R
AMPLIFIER
049517
11
12
Page 10
3L 3R
DAUGHTER
049507
4L 4R
AMPLIFIER
049517
13
14
Page 11
MC2102
5
POWER SUPPLY
049509
15
16
Page 12
5
POWER SUPPLY
049509
6A
OUTPUT
049510
17
18
Page 13
MC2102
6B
REMOTE SWITCH
049510
7A
PANEL LAMP
049646
19
20
Page 14
7B
PANEL LAMP
049646
8A
METER
049612
8B
METER
049612
21
22
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PARTS LIST
MC2102
Reference No.
Description
Part No.
INTERCONNECT
C1 C2 DISC CAP 0.0047MF 06127600 F1 FUSE 6.3A 250V SLO BLO IEC 08910400 L1 CHOKE, FILTER 0.5H 800MA 12233700 M1 M2 METER, OUTPUT 12407900 SW1 SW2 SWITCH, METER/POWER 2P3T 14625300 T1 T3 OUTPUT TRANS (LESS DECAL 126714) 04959000 T2 POWER TRANS (LESS DECAL 126713) 04959100
049508 INPUT
C1 C2 C3 C4 C5 C6 CAP ELECT 4.7UF 50V 06651200 D1 D2 D3 D4 D5 D6 D7 DIODE SILICON 07004700 J1 J3 CONN 4 PIN 11721500 J2 J4 J6 CONN MALE 5 PIN 11721600 J5 RECEPTACLE 9 POSITION 11772200 K1 K2 K3 K4 K5 K6 K7 K8 RELAY REED FORM 1A 5V 500 OHMS 08705000 K9 RELAY REED FORM 1C 5V 125 OHM 08705600 R5 R6 RES NETWORK 47KX6 14445800
049507 DAUGHTER
C1 CAP POLYPROP .047UF 10% 250VDC 06436400 C2 CAP POLYPROP 1UF 20% 250VDC 06443300 C3 CAP ELECT 100UF 6.3V 06649800 C4 CAP DISC 22PF 500V 06129300 C6 C11 CAP ELECT 10UF 100V 06649200 C7 C8 CAP MPOLY 0.1UF 630VDC 06443100 C9 CAP ELECT 10UF 250V 06649300 C10 CAP ELECT 1000UF 16V NP 06650000 C12 CAP M POLY .47UF 5% 50/63VDC 06433300 J1 CONN MALE 5 PIN 11721600 J2 CONN 4 PIN 11721500 J3 J4 J5 RECEPTACLE 9 POSITION 11772200 K1 K2 RELAY REED FORM 1C 5V 125 OHM 08705600 Q2 TRANSISTOR N JFET 13222200 R1 R12 RES MF 1M 1/4W 14426900 R2 R6 RES MF 1.21K 1% 1/4W 14419100 R3 R7 R31 RES MF 100K 1% 1/4W 14411300 R4 RES MF 93.1K 1% 1/4W 14441700 R5 RES MF 221K 1% 1/4W 14442100 R8 R9 RES MF 18.2K 1% 1/4W 14418100 R13 RES MF 332 1% 1/4W 14444600 R14 RES MF 365 1% 1/4W 14407100 R15 RES MF 28K 1% 1/4W 14436700 R18 R19 RES MF 475K 1% 1/4W 14436400 R20 R21 RES MF 1.5M 1% 1/4W 14442200 R22 RES MF 40.2K 1% 1/4W 14410700 R23 R24 RES MF 825K 1% 1/4W 14446000 R25 RES MF 200K 1% 1/4W 14411700 R26 R27 RES MF 61.9K 1% 1W 14445500 R28 RES MF 47.5K 1% 1/4W 14410800 R29 RES MF 100 1% 1/4W 14419600 R30 RES MF 66.5K 1% 1/4W 14445600 R32 POT TRIMMER 100K OHM 20% 13438300 R33 POT TRIMMER 2K OHM 20% 13438400 R36 RES MF 2.74M 1/4W 14427100 R37 RES MF 10K 1% 1/4W 14405300
049517 AMPLIFIER
C1 CAP POLYPROP 1UF 20% 250VDC 06443300 C2 C3 CAP POLYPRP 0.22UF 20% 1000VDC 06443200 C4 C5 C8 CAP ELECT 10UF 250V 06649300 C6 CAP DISC 22PF 500V 06129300 C7 CAP MONO 330PF 200V 10% NPO 06131100 C9 CAP ELECT 47UF 450V 06649700 D1 D2 D3 DIODE ZENER 200V 1.5W 07014600 D4 D5 DIODE RECTIFIER 07013100 J1 CONN MALE 6 PIN 11769800 J2 HEADER 9 CIRCUIT 11772400 J3 J4 J5 HEADER 9 POSITION 11772300 L1 L2 L3 L4 CHOKE 2.2 MH 12200100 R1 RES MF 100K 1% 1/2W 14442900 R2 R3 R6 R7 R21 RES MO 46-4K 1% 1W 14443600 R4 R5 RES MF 1M 1% 1/2W 14443200 R8 R9 RES MO 18K 5% 1W 14428600 R10 R11 R12 R13 RES MF 1K OHM 1% 1/2W 14430900 R14 R15 R16 R17 RES MO 220 5% 5W 14446300 R14 R15 R16 R17 L1 L3 SOLDER LUG .070 HOLE 07502000 R18 RES MF 22.1K 1% 1/2W 14442700 R19 RES MF 3.92K 1% 1/2W 14442400 R20 RES MO 10K 5% 2W 14443700 R22 RES MF 121K OHM 1% 1/2W 14430800 R23 RES MF 82.5K 1% 1/2W 14445900 V1 V2 V3 V4 SOCKET 9 PIN TUBE CERAMIC 17817000 V5 V6 V7 V8 SOCKET OCTAL TUBE CERAMIC 17816900
049509 POWER SUPPL Y
C1 CAP ELECT 22UF 100V 06650600 C2 CAP MPOLY 0.1UF 630VDC 06443100 C3 CAP POLY .047UF 10% 1000VDC 06443400 C4 C20 CAP ELECT 47UF 250V 06649600 C5 C6 C7 C8 CAP ELECT 1000MF 300V 06652000 C9 C11 CAP ELECT 2200MF 25V 06652200 C10 C21 C22 CAP ELECT 47UF 35V 06644600 C12 C25 C26 CAP M POLY .22UF 5% 63VDC 06432900 C15 C16 CAP M POLY 1UF 5% 63VDC 06433700 C17 C18 CAP MONO .1UF 50V 20% Z5U 06130500 C23 CAP ELECT 4.7UF 50V 06651200 C27 CAP ELECT 1UF 50V 06651000 C28 C29 CAP POLY 680PF 5% 160VDC 06429800 D1 D2 D5 D6 D19 DIODE SIL 400 PIV @ 1.5A 07003100 D3 RECT BRIDGE 400V/0.9A 07016800 D4 DIODE BRIDGE RECT 1000V 6A 07016500 D7 D8 D9 D10 D11 D12 D15 DIODE SILICON 07004700 D16 D20 D21 D22 D23 D24 DIODE SILICON 07004700 D25 D26 D27 DIODE SILICON 07004700 F1 FUSE 2A 250V SLO-BLO 5X20 IEC 08908800 F1 F2 HOLDER FUSE 5X20MM 17815900 F2 FUSE .25A 250V SLO-BLO 08905900 IC1 IC REGULATOR 12V 13315600 IC2 IC REGULATOR 5V 13325000 IC3 IC -5V REGULATOR 13325300 IC4 IC NAND SCHMIT 2-IN X 4 13319200 IC5 IC QUAD OP AMP TLC074CN 13341900
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PARTS LIST con’t
Reference No.
J1 J2 J7 J8 J14 BLADE FASTON .187 11772600 J3 J4 J5 J9 J11 J12 CONN MALE 6 PIN PCB MOUNT 11769800 J6 HEADER 9 CIRCUIT 11772400 J10 CONN 8 POS MALE 11727500 J15 CONN MALE 7 PIN 11721700 J16 CONN 3 POS MALE 11729300 J17 CONN MALE 6 POS 11721800 J25 CONN MALE 3 POS 11721400 K1 RELAY 48VDC TV-8 08705200 OP1 TRIAC OPTOCOUPLER 13102400 Q1 TRANSISTOR P CHAN JUNCTION FET 13222600 Q2 Q5 TRANSISTOR NPN 13222300 Q3 Q4 Q6 Q7 TRANSISTOR NPN 13225400 Q8 Q9 TRANSISTOR N JFET 13222200 R1 RES WW 1.5K 10% 5W 13907900 R2 RES MET OXIDE 30K 5% 2W RES 14435300 R6 RES MF 22.1K 1% 1/4W 14418700 R7 RES MF 1K 1% 1/4W 14409000 R8 RES MF 10K 1% 1/2W 14442500 R10 R11 R40 RES MF 15K 1% 1/4W 14441200 R12 R13 R27 R45 RES MF 200K 1% 1/4W 14411700 R14 R15 RES MF 10K 1% 1/4W 14405300 R16 R43 RES MF 10M 1% 1/4W 14426400 R18 R19 RES MF 174K 1% 1/4W 14435200 R20 R21 POT TRIMMER 100K OHM 20% 13438300 R26 R35 R37 R44 RES MF 100 1% 1/4W 14419600 R28 R29 R46 R47 RES MF 3920 OHM 1% 1/4W 14419800 R30 R36 RES MF 1M 1/4W 14426900 R31 RES MF 68.1 1% 1/4W 14408200 R32 R33 RES CF 270K 5% 1/2W 14155100 R34 RES CF 10 5% 1/4W 14113600 R38 RES MF 95.3K 1% 1/4W 14412700 R41 R48 RES MF 2.74M 1/4W 14427100 R49 RES MF 1K OHM 1% 1/2W 14430900 RT1 RT2 SOLDER LUG .070 HOLE 07502000 RT1 RT2 THERMISTOR 5 OHM 14415100
Description
Part No.
049612 METER LAMP
DS1 DS2 DS3 DS4 DS5 DS6 LAMP INCANDESCENT 14V 100MA 05815300 J1 J4 CONN MALE 3 POS 11722100 J2 CONN MALE 3 POS 11721400 J3 CONN 4 PIN 11721500
MISC ITEMS
POST CARD SERVICE REPAIR 039594 OWNERS MANUAL 040742 TUBE 12AX7A 165065 TUBE 12AT7 165067 TUBE KT88 165069 LINE CORD SET 14GA VW1/PT2 170937
049510 REMOTE SWITCH/OUTPUT
C1 C2 POLYPRO 0.22MF 400V 20% 06443800 C3 C4 CAP ELEC 2.2UF 06651100 J1 HEADER 9 POSITION 11772300 J2 CONN MALE 6 POS 11721800 J3 BLADE FASTON .187 11772600 J4 CONN MALE 3 POS 11721400 J5 J6 HEADER 4 CIRCUIT POST 11777200 J7 J8 JACK MINI WITH NUT 11775800 R1 R2 RES WW 4 OHMS 5% 5W 13911900 S1 SWITCH SLIDE 2P3T 14807500 S2 SWITCH SLIDE DPDT 3MM 14807400
049646 P ANEL LAMP
DS1 LED RED HIGH EFFICIENCY 05814800 DS2 DS3 DS4 DS5 LAMP INCANDESCENT 14V 100MA 05815300 J1 CONN MALE 3 POS 11721400 J2 CONN 4 PIN 11721500
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26
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EXPLODED VIEW
MC2102
27
28
Page 18
EXPLODED VIEW
29 30
Page 19
EXPLODED PARTS LIST
Item No.
1 016438 GLASS 2 049595 KNOB ASSY 3 104164 WASHER BLK FELT 1 X 1/4 X 1/16 4 018678 BOTTOM EXTRUSION 5 101172 SCREW TC 6-32 X 1/4 PH FL U/C 6 018585 TOP EXTRUSION 7 005144 EXTRUSION BRACKET 8 018615 END CAP 9” 9 101042 SCREW TS 4-40 X ½ SLOT FILLISTER 10 094016 TAPE FOAM 1/4 X 1/8 11 094360 TAPE FOAM 1/2 X 1/2 12 098113 DIAL CORD 13 017862 PUSH-ON FOOT 14 092434 FILTER METER 15 094017 TAPE FOAM 1/4 X 1/4 16 017839 PLEXIGLAS PANEL 17 124079 METER 18 092436 FILTER PALE BLUE 19 092435 FILTER AZURE BLUE 20 049646 PANEL LAMP PCB ASSY 21 100157 SCREW MACH 6-32 X 1/4 PHIL PAN 22 077025 SLEEVING FIBERGLAS #5 23 005134 SUBP ANEL 24 021159 BUSHING SWITCH 25 146253 SWITCH METER 26 052099 LIGHT BOX METER 27 102001 KEP NUT 4-40 CADMIUM PLATE 28 049612 METER PCB ASSY 29 101150 SCREW HI/LO 4-40 X 1/4 PHIL PAN 30 005137 MAIN PCB SHIELD 31 005154 DUST COVER BOTTOM 32 005153 DUST COVER SIDE 33 005152 DUST COVER TOP 34 126776 DECAL TOP COVER 35 005126 CHASSIS 36 165067 TUBE 12AT7 37 165065 TUBE 12AX7A 38 117487 RECEPT ACLE AC LINE 39 178161 FUSE HOLDER 5 X 20mm 40 117740 BINDING POST RED 41 117741 BINDING POST BLK 42 109018 SCREW MACH M2.5 X 0.45 X 5mm LONG 43 052104 CABLE ASSY RIGHT INPUT 44 052105 CABLE ASSY LEFT INPUT 45 100195 SCREW MACH 4 – 40 X 3/8 PH OVAL GLD 46 017761 AIR PIPE 47 100292 SCREW MACH 6-32 X 3/8 PH FH BLK 48 165069 TUBE KT88 49 005155 TUBE COVER 50 106055 CLIP TINNERMAN 51 101219 SCREW 6-32 X 5 TUBE COVER 52 049590 OUTPUT TRANSFORMER
Part No.
Description
53 049591 POWER TRANSFORMER 54 126714 DECAL OUTPUT TRANSFORMER 55 126713 DECAL POWER TRANSFORMER 56 049517 AMP PCB ASSY 57 017859 SPACER NYLON 6-32 X 7/16 58 101054 SCREW TAPTITE 6-32 X 1/4 PH PAN BLK 59 049507 DAUGHTER PCB ASSY 60 005135 CHASSIS SUPPORT 61 017801 RIVET PLASTIC 62 102006 NUT MACH W/LOCK 63 017860 SUPPORT PCB LOCKING 64 049509 POWER PCB ASSY 65 126524 DECAL FUSE REPLACEMENT 66 126527 DECAL FUSE 67 122337 CHOKE FILTER 68 102005 NUT MACH 8-32 W/LOCK 69 049508 INPUT PCB ASSY 70 005146 INPUT PCB BRACKET 71 049510 REMOTE SW/OUTPUT 72 104162 WASHER LOCK INTERNAL TOOTH 73 102051 HEX NUT M9 X .75 GOLD PLATED 74 104165 LW 3/8 INTERNAL GOLD TOOTH 75 104067 WASHER LOCK #10 INTERNAL STAR 76 104078 WASHER LOCK #8 INTERNAL STAR 77 005174 SWITCH SP ACER 78 017802 WIRE CLAMP 79 005151 BOTTOM COVER 80 101078 8-32 X 5/16 PH PAN BLK 81 017841 FOOT 82 100159 SCREW MACH 10-32 X 3/4 PH PAN BLK 83 024010 FOOT PAD 84 104016 WASHER LOCK 1/2 INT STAR 85 126250 DECAL GROUND
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Page 20
REPACKING INSTRUCTIONS
MC2102
POWER AMPLIFIER
33
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 040806
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