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POWER AMPLIFIER
CONTENTS
Performance Specifications ........................................ 2 Power Supply Schematic and PCB ..................... 15 - 18
Notes ......................................................................... 2 Output Schematic and PCB ............................... 17 - 18
Rear Panel .................................................................. 3 Remote Switch Schematic and PCB ................... 19 - 20
Section Location ........................................................ 4 Panel Lamp A Schematic and PCB ..................... 19 - 20
Block Diagram ...................................................... 5 - 6 Panel Lamp B Schematic and PCB ............................ 21
Interconnection Diagram ...................................... 7 - 8 Meter A & B Schematic and PCB .............................. 22
Input Schematic and PCB .................................... 9 - 10 Parts List ............................................................ 23 - 26
Daughter Schematic and PCB ............................. 11 - 13 Exploded Views and Parts Lists .......................... 27 - 32
Amplifier Schematic and PCB ....................... 11 - 12, 14 Repacking Instruction .............................................. 33
SERVICE MANUAL
PERFORMANCE SPECIFICATIONS
Power Output Intermodulation Distortion
Minimum sine wave continuous average power output per Maximum Intermodulation Distortion if instantaneous
channel, both channels operating is: peak output does not exceed twice the rated output,
100 watts into 2 ohm load for any combination of frequencies from 20Hz to
100 watts into 4 ohm load 20,000Hz is:
100 watts into 8 ohm load 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)
Power Output Mono Parallel
Miniumum sine wave continuous average power output is:
Input Impedance
200 watts into 1 ohm, 2 ohm or 4 ohm load
20,000 ohms Unbalanced Inputs
40,000 ohms Balanced Inputs
Power Output Mono Bridge
Miniumum sine wave continuous average power output is:
Wide Band Damping Factor
200 watts into 4 ohm, 8 ohm or 16 ohm load
Greater than 18
Rated Power Band
20Hz to 20,000Hz
Power Requirements
100 Volts ~ , 50/60Hz at 6.0 amps
110 Volts ~ , 50/60Hz at 5.5 amps
Total Harmonic Distortion 120 Volts ~ , 50/60Hz at 5.0 amps
Maximum Total Harmonic Distortion at any power level 220 Volts ~ , 50/60Hz at 2.5 amps
from 250 milliwatts to rated power output is: 230 Volts ~ , 50/60Hz at 2.5 amps
0.5% for 2, 4 or 8 ohm loads (Stereo) 240 Volts ~ , 50/60Hz at 2.5 amps
0.5% for 1, 2 or 4 ohm loads (Mono Parallel) Note: Refer to the rear panel of the MC2102 for the correct
0.5% for 4, 8 or 16 ohm loads (Mono Bridge) voltage.
Frequency Response Dimensions
+0, -0.25dB from 20Hz to 20,000Hz Front Panel: 17-3/4 inches (45.08cm) wide, 10-1/8 inches
+0, -3dB from 10Hz to 70,000Hz
(25.72cm) high. Depth behind front mounting panel is 16
inches (40.64cm). Clearance required in front of the Front
Sensitivity Panel is 1 inches (2.54cm) for knobs.
2.5 Volts Unbalanced Input
5 Volts Balanced Input
Weight
88 pounds (40kg) net, 121 pounds (54.9kg) in shipping carton
A-Weighted Signal To Noise Ratio
100dB
NOTES
1. The heavy lines on the schematic denote the primary 4. On PC board drawings, Square pad indicates:
signal path. a. Polarized Capacitors - Positive
b. Diodes - Cathode
2. Unless otherwise noted, all voltages indicated on the c. Others - Pin 1
schematics are measured under the following conditions:
a. AC input at 120 volts, 50/60Hz. 5. WARNING
b. All voltages are +/-10% with respect to ground. A Parts marked with the symbol have critical
high impedance (10 megaohm) voltmeter must be used. characteristics. Use only replacement parts recom-
mended by the manufacturer.
3. Unless otherwise specified:
a. Resistor values are in ohms.
b. Capacitor values are microfarads (uF).
c. Inductor values are in microhenries (uH).
2
MC2102
TOP AND REAR PANEL
3
SECTION LOCATIONS
BOTTOM VIEW WITH COVER REMOVED
4
MC2102
BLOCK DIAGRAM
5 6
1 INTERCONNECT
7 8
MC2102
2 INPUT 049508
9
2 INPUT 049508
10
MC2102
3L 3R DAUGHTER 049507
4L 4R AMPLIFIER 049517
11 12
3L 3R DAUGHTER 049507 4L 4R AMPLIFIER 049517
13 14
MC2102
5 POWER SUPPLY 049509
15 16
5 POWER SUPPLY 049509
6A OUTPUT 049510
17 18
MC2102
6B REMOTE SWITCH 049510
7A PANEL LAMP 049646
19 20
7B PANEL LAMP 049646 8A METER 049612 8B METER 049612
21 22
MC2102
PARTS LIST
Reference No. Description Part No.
INTERCONNECT
C1 C2 DISC CAP 0.0047MF 06127600 049517 AMPLIFIER
F1 FUSE 6.3A 250V SLO BLO IEC 08910400 C1 CAP POLYPROP 1UF 20% 250VDC 06443300
L1 CHOKE, FILTER 0.5H 800MA 12233700 C2 C3 CAP POLYPRP 0.22UF 20% 1000VDC 06443200
M1 M2 METER, OUTPUT 12407900 C4 C5 C8 CAP ELECT 10UF 250V 06649300
SW1 SW2 SWITCH, METER/POWER 2P3T 14625300 C6 CAP DISC 22PF 500V 06129300
T1 T3 OUTPUT TRANS (LESS DECAL 126714) 04959000 C7 CAP MONO 330PF 200V 10% NPO 06131100
T2 POWER TRANS (LESS DECAL 126713) 04959100 C9 CAP ELECT 47UF 450V 06649700
D1 D2 D3 DIODE ZENER 200V 1.5W 07014600
049508 INPUT D4 D5 DIODE RECTIFIER 07013100
C1 C2 C3 C4 C5 C6 CAP ELECT 4.7UF 50V 06651200 J1 CONN MALE 6 PIN 11769800
D1 D2 D3 D4 D5 D6 D7 DIODE SILICON 07004700 J2 HEADER 9 CIRCUIT 11772400
J1 J3 CONN 4 PIN 11721500 J3 J4 J5 HEADER 9 POSITION 11772300
J2 J4 J6 CONN MALE 5 PIN 11721600 L1 L2 L3 L4 CHOKE 2.2 MH 12200100
J5 RECEPTACLE 9 POSITION 11772200 R1 RES MF 100K 1% 1/2W 14442900
K1 K2 K3 K4 K5 K6 K7 K8 RELAY REED FORM 1A 5V 500 OHMS 08705000 R2 R3 R6 R7 R21 RES MO 46-4K 1% 1W 14443600
K9 RELAY REED FORM 1C 5V 125 OHM 08705600 R4 R5 RES MF 1M 1% 1/2W 14443200
R5 R6 RES NETWORK 47KX6 14445800 R8 R9 RES MO 18K 5% 1W 14428600
R10 R11 R12 R13 RES MF 1K OHM 1% 1/2W 14430900
049507 DAUGHTER R14 R15 R16 R17 RES MO 220 5% 5W 14446300
C1 CAP POLYPROP .047UF 10% 250VDC 06436400 R14 R15 R16 R17 L1 L3 SOLDER LUG .070 HOLE 07502000
C2 CAP POLYPROP 1UF 20% 250VDC 06443300 R18 RES MF 22.1K 1% 1/2W 14442700
C3 CAP ELECT 100UF 6.3V 06649800 R19 RES MF 3.92K 1% 1/2W 14442400
C4 CAP DISC 22PF 500V 06129300 R20 RES MO 10K 5% 2W 14443700
C6 C11 CAP ELECT 10UF 100V 06649200 R22 RES MF 121K OHM 1% 1/2W 14430800
C7 C8 CAP MPOLY 0.1UF 630VDC 06443100 R23 RES MF 82.5K 1% 1/2W 14445900
C9 CAP ELECT 10UF 250V 06649300 V1 V2 V3 V4 SOCKET 9 PIN TUBE CERAMIC 17817000
C10 CAP ELECT 1000UF 16V NP 06650000 V5 V6 V7 V8 SOCKET OCTAL TUBE CERAMIC 17816900
C12 CAP M POLY .47UF 5% 50/63VDC 06433300
J1 CONN MALE 5 PIN 11721600 049509 POWER SUPPLY
J2 CONN 4 PIN 11721500 C1 CAP ELECT 22UF 100V 06650600
J3 J4 J5 RECEPTACLE 9 POSITION 11772200 C2 CAP MPOLY 0.1UF 630VDC 06443100
K1 K2 RELAY REED FORM 1C 5V 125 OHM 08705600 C3 CAP POLY .047UF 10% 1000VDC 06443400
Q2 TRANSISTOR N JFET 13222200 C4 C20 CAP ELECT 47UF 250V 06649600
R1 R12 RES MF 1M 1/4W 14426900 C5 C6 C7 C8 CAP ELECT 1000MF 300V 06652000
R2 R6 RES MF 1.21K 1% 1/4W 14419100 C9 C11 CAP ELECT 2200MF 25V 06652200
R3 R7 R31 RES MF 100K 1% 1/4W 14411300 C10 C21 C22 CAP ELECT 47UF 35V 06644600
R4 RES MF 93.1K 1% 1/4W 14441700 C12 C25 C26 CAP M POLY .22UF 5% 63VDC 06432900
R5 RES MF 221K 1% 1/4W 14442100 C15 C16 CAP M POLY 1UF 5% 63VDC 06433700
R8 R9 RES MF 18.2K 1% 1/4W 14418100 C17 C18 CAP MONO .1UF 50V 20% Z5U 06130500
R13 RES MF 332 1% 1/4W 14444600 C23 CAP ELECT 4.7UF 50V 06651200
R14 RES MF 365 1% 1/4W 14407100 C27 CAP ELECT 1UF 50V 06651000
R15 RES MF 28K 1% 1/4W 14436700 C28 C29 CAP POLY 680PF 5% 160VDC 06429800
R18 R19 RES MF 475K 1% 1/4W 14436400 D1 D2 D5 D6 D19 DIODE SIL 400 PIV @ 1.5A 07003100
R20 R21 RES MF 1.5M 1% 1/4W 14442200 D3 RECT BRIDGE 400V/0.9A 07016800
R22 RES MF 40.2K 1% 1/4W 14410700 D4 DIODE BRIDGE RECT 1000V 6A 07016500
R23 R24 RES MF 825K 1% 1/4W 14446000 D7 D8 D9 D10 D11 D12 D15 DIODE SILICON 07004700
R25 RES MF 200K 1% 1/4W 14411700 D16 D20 D21 D22 D23 D24 DIODE SILICON 07004700
R26 R27 RES MF 61.9K 1% 1W 14445500 D25 D26 D27 DIODE SILICON 07004700
R28 RES MF 47.5K 1% 1/4W 14410800 F1 FUSE 2A 250V SLO-BLO 5X20 IEC 08908800
R29 RES MF 100 1% 1/4W 14419600 F1 F2 HOLDER FUSE 5X20MM 17815900
R30 RES MF 66.5K 1% 1/4W 14445600 F2 FUSE .25A 250V SLO-BLO 08905900
R32 POT TRIMMER 100K OHM 20% 13438300 IC1 IC REGULATOR 12V 13315600
R33 POT TRIMMER 2K OHM 20% 13438400 IC2 IC REGULATOR 5V 13325000
R36 RES MF 2.74M 1/4W 14427100 IC3 IC -5V REGULATOR 13325300
R37 RES MF 10K 1% 1/4W 14405300 IC4 IC NAND SCHMIT 2-IN X 4 13319200
IC5 IC QUAD OP AMP TLC074CN 13341900
23 24
PARTS LIST con't
Reference No. Description Part No.
J1 J2 J7 J8 J14 BLADE FASTON .187 11772600 049612 METER LAMP
J3 J4 J5 J9 J11 J12 CONN MALE 6 PIN PCB MOUNT 11769800 DS1 DS2 DS3 DS4 DS5 DS6 LAMP INCANDESCENT 14V 100MA 05815300
J6 HEADER 9 CIRCUIT 11772400 J1 J4 CONN MALE 3 POS 11722100
J10 CONN 8 POS MALE 11727500 J2 CONN MALE 3 POS 11721400
J15 CONN MALE 7 PIN 11721700 J3 CONN 4 PIN 11721500
J16 CONN 3 POS MALE 11729300
J17 CONN MALE 6 POS 11721800
J25 CONN MALE 3 POS 11721400
MISC ITEMS
K1 RELAY 48VDC TV-8 08705200
POST CARD SERVICE REPAIR 039594
OP1 TRIAC OPTOCOUPLER 13102400
OWNERS MANUAL 040742
Q1 TRANSISTOR P CHAN JUNCTION FET 13222600
TUBE 12AX7A 165065
Q2 Q5 TRANSISTOR NPN 13222300
TUBE 12AT7 165067
Q3 Q4 Q6 Q7 TRANSISTOR NPN 13225400
TUBE KT88 165069
Q8 Q9 TRANSISTOR N JFET 13222200
LINE CORD SET 14GA VW1/PT2 170937
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
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 PANEL 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
25 26
MC2102
EXPLODED VIEW
27 28
EXPLODED VIEW
29 30
EXPLODED PARTS LIST
Item No. Part No. Description
1 016438 GLASS 53 049591 POWER TRANSFORMER
2 049595 KNOB ASSY 54 126714 DECAL OUTPUT TRANSFORMER
3 104164 WASHER BLK FELT 1 X 1/4 X 1/16 55 126713 DECAL POWER TRANSFORMER
4 018678 BOTTOM EXTRUSION 56 049517 AMP PCB ASSY
5 101172 SCREW TC 6-32 X 1/4 PH FL U/C 57 017859 SPACER NYLON 6-32 X 7/16
6 018585 TOP EXTRUSION 58 101054 SCREW TAPTITE 6-32 X 1/4 PH PAN BLK
7 005144 EXTRUSION BRACKET 59 049507 DAUGHTER PCB ASSY
8 018615 END CAP 9" 60 005135 CHASSIS SUPPORT
9 101042 SCREW TS 4-40 X