C220

Performance Specifications ........................................ 2Notes ......................................................................... 2Rear Panel .................................................................. 3Section Location ........................................................ 3Block Diagram ...................................................... 5 - 6Interconnection Diagram ...................................... 7 - 8Main Schematic and PCB ................................... 9 - 18

Display Schematic and PCB .............................. 19 - 24Balanced/Data Sch and PCB .............................. 25 - 30Pushbutton Sch and PCB .................................. 31 - 32Headphone Sch and PCB ................................. 33 - 34Parts List ............................................................ 37 - 43Repacking Instructions ............................................. 45

CONTENTS

SERIAL NO. WS1001 And Above

C220TUBE PREAMPLIFIER

SERVICE MANUALSerial Number WS1001 And Above

PRELIM

INARY

PERFORMANCE SPECIFICATIONS

2

Frequency Response+0, -0.5dB from 20Hz to 20,000Hz

Total Harmonic Distortion0.08% from 20Hz to 20,000Hz

Main Output2.5V for rated input

Maximum Voltage Output8V RMS Unbalanced, 16V RMS Balanced

Sensitivity (for rated output)High Level, 450mV unbalanced, 900mV balancedPhono, 4.5mV

Signal To Noise Ratio (A-Weighted)High Level, 90dB below rated outputPhono, 80dB below 10mV input

Input ImpedanceHigh Level, 22K ohmsPhono, 47K ohms; 65pF

Maximum Input SignalHigh Level, 5V Unbalanced, 10V BalancedPhono, 50mV (@ 1,000Hz)

Output Impedance250 ohms

Voltage GainHigh Level to Tape Output: 0dBHigh Level to Main Output: 15dBPhono to Main Output: 55dB

Headphone Output Impedance16 ohms to 250 ohms

Tube ComplimentPhono Circuitry: 2 - 12AX7AHigh Level Circuitry: 2 - 12AX7A

Power Requirements100 Volts, 50/60Hz at 75 watts110 Volts, 50/60Hz at 75 watts120 Volts, 50/60Hz at 75 watts220 Volts, 50/60Hz at 75 watts230 Volts, 50/60Hz at 75 watts240 Volts, 50/60Hz at 75 watts

Note: Refer to the rear panel of the C220 for thecorrect voltage.

Overall DimensionsWidth is 17-1/2 inches (44.45cm)Height is 6 inches (15.24cm) including feetDepth is 18 inches (45.72cm) including the Front Panel,Knobs and Cables

Weight21.1 pounds (9.59 kg) net, 37.5 pounds (17.05 kg) inshipping carton

Shipping Carton DimensionsWidth is 26-1/2 inches (67.3cm)Depth is 24-1/4 inches (62.2cm)Height is 11-3/4 inches (29.9cm)

1. The heavy notes on the schematic denote the primarysignal path.

2. Unless otherwise noted, all voltages indicated on theschematics 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 - Positiveb. Diodes - Cathodec. Others - Pin 1

5. WARNINGParts marked with the symbol have criticalcharacteristics. Use only replacement parts recom-mended by the manufacturer.

NOTES

C220

REAR PANEL

SECTION LOCATIONSTOP VIEW WITH COVER REMOVED

3

NOTES

4

C220

BLOCK DIAGRAM

5 6

7 8

INTERCONNECT

C220

9 10

MAIN 050329 SCH 1 OF 42

11 12

MAIN 050329 SCH 2 OF 42

C220

13 14

MAIN 050329 SCH 3 OF 42

15 16

MAIN 050329 SCH 4 OF 42

C220

17 18

MAIN 050329 PCB2

19 20

DISPLAY 050330 SCH 1 of 33

C220

21 22

DISPLAY 050330 SCH 2 of 33

23 24

DISPLAY 050330 SCH 3 of 3 and PCB3

C220

25 26

BALANCED / DATA 051331 SCH 1 of 24

27 28

BALANCED / DATA 050331 SCH 2 of 24

C220

29 30

BALANCED / DATA 050331 PCB4

31 32

PUSHBUTTON 051332 SCH and PCB5

C220

33 34

HEADPHONE 051333 SCH and PCB6

35 36

NOTES

C220

37

PARTS LISTMAIN PCB 050329Ref No. Description Part No.C1 CAP ELECT 10UF 50V 066445C2 CAP MPF 0.1UF 630VDC 064431C3 CAP MONO 47PF 200V 10% NPO 061340C4 CAP MONO 47PF 200V 10% NPO 061340C5 CAP ELECT 22UF 100V 066574C6 CAP POLYPROP 1UF 20% 250VDC 064433C8 CAP ELECT 10UF 50V 066445C7 CAP ELECT 1UF 50V 066510C9 CAP ELECT 47UF 35V 066446C10 CAP MONO 47PF 200V 10% NPO 061340C11 CAP MONO 47PF 200V 10% NPO 061340C12 CAP MONO 1000PF 50V 10% NPO 061344C13 CAP MONO 1000PF 50V 10% NPO 061344C14 CAP MONO 1000PF 50V 10% NPO 061344C15 CAP MONO 1000PF 50V 10% NPO 061344C16 CAP ELECT 10UF 50V 066445C17 CAP ELECT 47UF 35V 066446C18 CAP DISC MONO .47UF 50V 061320C19 CAP MONO .1UF 50V 20% Z5U 061346C20 CAP MONO .1UF 50V 20% Z5U 061346C21 CAP ELECT 47UF 450V 066497C22 CAP ELECT 47UF 35V 066446C23 CAP ELECT 47UF 450V 066497C24 CAP ELECT 1UF 50V 066510C25 CAP MONO .1UF 50V 20% Z5U 061346C26 CAP ELECT 10UF 50V 066445C28 CAP MONO .1UF 50V 20% Z5U 061346C29 CAP ELECT 10UF 250V 066493C30 CAP ELECT 4700UF 066443C31 CAP MONO 220PF 200V 10% NPO 061342C32 CAP MONO 1000PF 50V 10% NPO 061344C33 CAP MONO 1000PF 50V 10% NPO 061344C34 CAP MONO 1000PF 50V 10% NPO 061344C35 CAP MONO 1000PF 50V 10% NPO 061344C36 CAP MPF 0.1UF 630VDC 064431C37 CAP ELECT 10UF 50V 066445C39 CAP POLYPROP 1UF 20% 250VDC 064433C40 CAP ELECT 1UF 50V 066510C41 CAP ELECT 47UF 35V 066446C42 CAP MPF 0.1UF 630VDC 064431C43 CAP ELECT 10UF 16V 066580C44 CAP MONO 220PF 200V 10% NPO 061342C45 CAP MONO 47PF 200V 10% NPO 061340C46 CAP POLYPROP 1UF 20% 250VDC 064433C47 CAP ELECT 1UF 50V 066510C48 CAP ELECT 100UF 25V 066573C49 CAP ELECT 10UF 16V 066580C50 CAP MONO .1UF 50V 20% Z5U 061346C51 CAP ELECT 100UF 25V 066573C52 CAP ELECT 10UF 16V 066580C53 CAP PF 0.001UF 5% 63VDC 064453C54 CAP MPF 0.0033UF 5% 63VDC 064306C55 CAP ELECT 10UF 16V 066580C56 CAP MPF 0.1UF 630VDC 064431

C57 CAP ELECT 10UF 16V 066580C58 CAP MONO 47PF 200V 10% NPO 061340C59 CAP POLYPROP 1UF 20% 250VDC 064433C60 CAP ELECT 1UF 50V 066510C61 CAP ELECT 10UF 250V 066493C62 CAP ELECT 100UF 25V 066573C63 CAP ELECT 10UF 16V 066580C64 CAP ELECT 100UF 25V 066573C65 CAP ELECT 10UF 16V 066580C66 CAP PF 0.001UF 5% 63VDC 064453C67 CAP MPF 0.0033UF 5% 63VDC 064306C68 CAP ELECT 10UF 16V 066580C69 CAP ELECT 10UF 16V 066580C70 CAP MONO 100PF 100V 10% NPO 061341C71 CAP ELECT 10UF 16V 066580C72 CAP MONO .1UF 50V 20% Z5U 061346C73 CAP MONO .1UF 50V 20% Z5U 061346C74 CAP MONO 100PF 100V 10% NPO 061341C75 CAP ELECT 10UF 16V 066580C76 CAP MONO 100PF 100V 10% NPO 061341C77 CAP ELECT 10UF 16V 066580C78 CAP ELECT 10UF 16V 066580C79 CAP ELECT 10UF 16V 066580C80 CAP MONO 100PF 100V 10% NPO 061341C81 CAP ELECT 10UF 16V 066580C82 CAP MONO 100PF 100V 10% NPO 061341C83 CAP ELECT 10UF 16V 066580C84 CAP MONO 100PF 100V 10% NPO 061341C85 CAP ELECT 10UF 16V 066580C86 CAP ELECT 10UF 16V 066580C87 CAP MONO .1UF 50V 20% Z5U 061346C88 CAP ELECT 220UF 50V 20% 066254C89 CAP POLYPROP .047UF 10% 250VDC 064364C90 CAP ELECT 220UF 50V 20% 066254C91 CAP MONO .1UF 50V 20% Z5U 061346C92 CAP ELECT 1UF 50V 066510C93 CAP ELECT 2200UF 50V 20% 066440C94 CAP MONO .1UF 50V 20% Z5U 061346C95 CAP ELECT 10UF 50V 066445C96 CAP ELECT 2200UF 50V 20% 066440C97 CAP ELECT 10UF 50V 066445C98 CAP MONO .1UF 50V 20% Z5U 061346C100 CAP POLYPROP .047UF 10% 250VDC 064364C102 CAP ELECT 10UF 50V 066445C103 CAP MONO .1UF 50V 20% Z5U 061346C104 CAP MONO .1UF 50V 20% Z5U 061346C105 CAP MONO .1UF 50V 20% Z5U 061346C106 CAP POLY .047UF 10% 1000VDC 064434C115 CAP ELECT 47UF 35V 066446C116 CAP ELECT 10UF 50V 066445C118 CAP ELECT 10UF 50V 066445C119 CAP ELECT 10UF 50V 066445C121 CAP MONO .1UF 50V 20% Z5U 061346C122 CAP MONO .1UF 50V 20% Z5U 061346

2

Ref No. Description Part No.

PARTS LIST con’t

38

C123 CAP ELECT 10UF 50V 066445C125 CAP MONO .1UF 50V 20% Z5U 061346C126 CAP MONO .1UF 50V 20% Z5U 061346C127 CAP ELECT 10UF 50V 066445C128 CAP ELECT 10UF 50V 066445C129 CAP ELECT 47UF 35V 066446C130 CAP ELECT 10UF 50V 066445C132 CAP ELECT 10UF 50V 066445C133 CAP ELECT 10UF 50V 066445C134 CAP MONO .1UF 50V 20% Z5U 061346C135 CAP MONO .1UF 50V 20% Z5U 061346C136 CAP ELECT 10UF 50V 066445C145 CAP ELECT 10UF 50V 066445C146 CAP ELECT 10UF 50V 066445C147 CAP ELECT 47UF 35V 066446C148 CAP ELECT 47UF 35V 066446C149 CAP MONO 220PF 200V 10% NPO 061342C150 CAP MONO .1UF 50V 20% Z5U 061346C152 CAP MONO .1UF 50V 20% Z5U 061346C155 CAP MONO .1UF 50V 20% Z5U 061346C151 CAP ELECT 10UF 50V 066445C153 CAP ELECT 10UF 50V 066445C154 CAP ELECT 10UF 50V 066445C156 CAP ELECT 10UF 50V 066445D1 DIODE SIL 400 PIV @ 1.5A 070031D2 DIODE SIL 400 PIV @ 1.5A 070031D3 DIODE SIL 400 PIV @ 1.5A 070031D4 DIODE SILICON 070174D5 DIODE SIL 400 PIV @ 1.5A 070031D6 DIODE SIL 400 PIV @ 1.5A 070031D7 DIODE SIL 400 PIV @ 1.5A 070031D8 DIODE SIL 400 PIV @ 1.5A 070031D9 DIODE SIL 400 PIV @ 1.5A 070031D10 DIODE SILICON 070174D11 DIODE SIL 400 PIV @ 1.5A 070031D12 DIODE SIL 400 PIV @ 1.5A 070031D13 DIODE SIL 400 PIV @ 1.5A 070031D15 DIODE SIL 400 PIV @ 1.5A 070031D14 DIODE SILICON 070174D16 DIODE SILICON 070174DS1 LED GREEN 3MM HI INTENSITY 058172DS2 LED GREEN 3MM HI INTENSITY 058172DS3 LED GREEN 3MM HI INTENSITY 058172DS4 LED GREEN 3MM HI INTENSITY 058172F2 FUSE 2A 250V SLO-BLO 5X20 IEC 089088(F2) HOLDER FUSE 5X20MM PCB MOUNT 178159F4 FUSE 1/8A SLO-BLO 5X20 IEC 089094(F4) HOLDER FUSE 5X20MM PCB MOUNT 178159F5 FUSE 0.5A SLO-BLO 5X20 IEC 089092(F5) HOLDER FUSE 5X20MM PCB MOUNT 178159GP1 BRACKET PCB CARD MOUNTING 003611GP2 BRACKET PCB CARD MOUNTING 003611J1 CONN FFC 18PIN 117765J2 JACK PHONO 6P GOLD PLATED 117449

J3 JACK PHONO 8P GOLD PLATED 117455J4 CONN FFC 18PIN 117765J5 CONN FFC 18PIN 117765J6 JACK PHONO 8P GOLD PLATED 117455J7 CONN 12 PIN FFC 117720J8 CONN FFC 18PIN 117765J9 HEADER 9 CIRCUIT POST NATURAL 117724J10 BLADE FASTON W/FEET 117708J11 BLADE FASTON W/FEET 117708J12 CONN PCB MOUNT POWER RED 117719J13 CONN PCB MOUNT POWER RED 117719J14 CONN PCB MOUNT POWER RED 117719J15 CONN PCB MOUNT POWER RED 117719J16 JACK PHONO GOLD PJ261G 117436J41 CONN FFC 18PIN 117765K1 RELAY REED SPST-NO 5V 1.2A 087078K2 RELAY REED SPST-NO 5V 1.2A 087078K3 RELAY REED SPST-NO 5V 1.2A 087078K4 RELAY REED SPST-NO 5V 1.2A 087078K5 RELAY REED SPST-NO 5V 1.2A 087078K6 RELAY REED SPST-NO 5V 1.2A 087078K7 RELAY REED SPST-NO 5V 1.2A 087078K8 RELAY REED SPST-NO 5V 1.2A 087078K9 RELAY REED SPST-NO 5V 1.2A 087078K10 RELAY REED SPST-NO 5V 1.2A 087078K11 RELAY REED SPST-NO 5V 1.2A 087078K12 RELAY REED SPST-NO 5V 1.2A 087078K13 RELAY REED SPST-NO 5V 1.2A 087078K14 RELAY REED SPST-NO 5V 1.2A 087078K15 RELAY REED SPST-NO 5V 1.2A 087078K16 RELAY REED SPST-NO 5V 1.2A 087078K17 RELAY REED FORM 1C 5V 125 OHM 087056K18 RELAY REED FORM 1C 5V 125 OHM 087056K20 RELAY 24VDC 5A 277VAC 087057K21 RELAY REED SPST-NO 5V 1.2A 087078K22 RELAY REED SPST-NO 5V 1.2A 087078K23 RELAY REED SPST-NO 5V 1.2A 087078K24 RELAY REED SPST-NO 5V 1.2A 087078K25 RELAY REED SPST-NO 5V 1.2A 087078K26 RELAY REED SPST-NO 5V 1.2A 087078K27 RELAY REED SPST-NO 5V 1.2A 087078Q1 TRANSISTOR N JFET 132318Q2 TRANSISTOR N JFET 132318Q3 TRANSISTOR N JFET 132318Q4 TRANSISTOR N JFET 132318Q5 TRANSISTOR PNP SILICON 132304Q6 TRANSISTOR PNP SILICON 132304Q7 TRANSISTOR PNP SILICON 132304Q8 TRANSISTOR PNP SILICON 132304Q9 TRANSISTOR PNP SILICON 132304Q10 TRANSISTOR PNP SILICON 132304Q11 TRANSISTOR PNP SILICON 132304Q12 TRANSISTOR PNP SILICON 132304Q13 TRANSISTOR N JFET 132318

MAIN PCB 050329 (cont’d)Ref No. Description Part No.

Ref No. Description Part No.

C220

PARTS LIST con’t

MCD201

39

Q14 TRANSISTOR N JFET 132318Q15 TRANSISTOR N JFET 132318Q16 TRANSISTOR N JFET 132318Q17 TRANSISTOR NPN POWER 132295(Q17) HEATSINK TO-220 080017Q19 TRANSISTOR PNP SILICON 132304Q29 TRANSISTOR PNP SILICON 132304Q21 TRANSISTOR NPN POWER 132295Q22 TRANSISTOR NPN 2A 50V 132302Q23 TRANSISTOR NPN 2A 50V 132302Q18 TRANSISTOR NPN SILICON 132317Q24 TRANSISTOR PNP 132326Q25 TRANSISTOR PNP 132326Q26 TRANSISTOR NPN SILICON 132317Q27 TRANSISTOR PNP 132326Q28 TRANSISTOR N JFET 132318Q30 TRANSISTOR N JFET 132318Q31 TRANSISTOR PNP 132326Q32 TRANSISTOR NPN SILICON 132317Q20 TRANSISTOR NPN 132325R1 RES MF 20K 1% 1/4W 144524R2 RES MF 150K 1% 1/4W 144627R3 RES MF 221K 1% 1/4W 144629R4 RES MF 200K 1% 1/4W 144531R5 RES MF 2.74K 1% 1/4W 144587R6 RES MF 2.21M 1% 1/4W 144576R7 RES MF 47.5K 1% 1/4W 144526R8 RES MF 33.2K 1% 1/4W 144694R9 RES MF 24.9K 1% 1/4W 144439R10 RES 16.5K 1% 1/4W 144103R11 RES MF 100K 1% 1/4W 144528R12 RES MF 1M 1% 1/4W 144577R13 RES MF 10M 1% 1/4W 144575R14 RES MF 10M 1% 1/4W 144575R15 RES MF 10M 1% 1/4W 144575R16 RES MF 10M 1% 1/4W 144575R17 RES MF 1.5K 1% 1/4W 144539R18 RES MF 3.32K 1% 1/4W 144518R19 RES MF 10K 1% 1/4W 144504R20 RES MF 267K 1% 1/4W 144532R21 RES MF 22.1K 1% 1/4W 144564R22 RES MF 12.1K 1% 1/4W 144550R23 RES MF 15K 1% 1/4W 144623R24 RES MF 267K 1% 1/4W 144532R25 RES MF 1M 1% 1/4W 144577R26 RES MF 267K 1% 1/4W 144532R27 RES MF 1M 1% 1/4W 144577R28 RES MF 267K 1% 1/4W 144532R29 RES MF 1M 1% 1/4W 144577R30 RES MF 267K 1% 1/4W 144532R31 RES MF 1M 1% 1/4W 144577R32 RES MF 267K 1% 1/4W 144532R33 RES MO 100K 5% 2W 144698R34 RES MF 10K 1% 1/4W 144504

R35 RES MF 1.5K 1% 1/4W 144539R36 RES MF 267K 1% 1/4W 144532R37 RES MF 12.1K 1% 1/4W 144550R38 RES MF 267K 1% 1/4W 144532R39 RES MF 267K 1% 1/4W 144532R40 RES MF 267K 1% 1/4W 144532R41 RES MF 267K 1% 1/4W 144532R42 RES MF 1K 1% 1/4W 144513R43 RES MF 1K 1% 1/4W 144513R44 RES MF 1K 1% 1/4W 144513R45 RES MF 1M 1% 1/4W 144577R46 RES MF 1M 1% 1/4W 144577R47 RES MF 221K 1% 1/4W 144629R48 RES MF 200K 1% 1/4W 144531R49 RES MF 1M 1% 1/4W 144577R50 RES MF 1M 1% 1/4W 144577R51 RES MF 3.32K 1% 1/4W 144518R52 RES MF 2.74K 1% 1/4W 144587R53 RES MF 20K 1% 1/4W 144524R54 RES MF 1K 1% 1/4W 144513R55 RES MF 150K 1% 1/4W 144627R56 RES MF 1M 1% 1/4W 144577R57 RES MF 1.5K 1% 1/4W 144539R58 RES MF 3.32K 1% 1/4W 144518R59 RES MF 47.5K 1% 1/4W 144526R60 RES MF 33.2K 1% 1/4W 144694R61 RES MF 2.21M 1% 1/4W 144576R62 RES MF 24.9K 1% 1/4W 144439R63 RES 16.5K 1% 1/4W 144103R64 RES MF 22.1K 1% 1/4W 144564R65 RES MF 10M 1% 1/4W 144575R66 RES MF 10M 1% 1/4W 144575R67 RES MF 10M 1% 1/4W 144575R68 RES MF 10M 1% 1/4W 144575R69 RES MF 15K 1% 1/4W 144623R70 RES MF 221K 1% 1/4W 144629R71 RES MF 200K 1% 1/4W 144531R72 RES MF 1K 1% 1/4W 144513R73 RES MF 1K 1% 1/4W 144513R74 RES MF 1K 1% 1/4W 144513R75 RES NETWORK 2 X 220K ISO 144678R76 RES MF 1M 1% 1/4W 144577R77 RES MF 47.5K 1% 1/4W 144526R78 RES MF 1.5K 1% 1/4W 144539R79 RES MF 953 OHM 1% 1/4W 144473R80 RES MF 22.1K 1% 1/4W 144564R81 RES MF 221K 1% 1/4W 144629R82 RES MF 1.82K 1% 1/4W 144582R83 RES MF 75K 1% 1/4W 144156R84 RES MF 1M 1% 1/4W 144577R85 RES NETWORK 2 X 220K ISO 144678R86 RES MF 221K 1% 1/4W 144629R87 RES MF 200K 1% 1/4W 144531R88 RES MF 1K 1% 1/4W 144513

MAIN PCB 050329 (cont’d)Ref No. Description Part No. Ref No. Description Part No.

PARTS LIST con’t

40

R89 RES NETWORK 2 X 220K ISO 144678R90 RES MF 1M 1% 1/4W 144577R91 RES MF 47.5K 1% 1/4W 144526R92 RES MF 1.5K 1% 1/4W 144539R93 RES MF 953 OHM 1% 1/4W 144473R94 RES MF 22.1K 1% 1/4W 144564R95 RES MF 221K 1% 1/4W 144629R96 RES MF 1.82K 1% 1/4W 144582R97 RES MF 75K 1% 1/4W 144156R98 RES MF 1M 1% 1/4W 144577R99 RES MF 1K 1% 1/4W 144513R100 RES NETWORK 2 X 220K ISO 144678R101 RES MF 40.2K 1% 1/4W 144525R102 RES MF 221 OHM 1% 1/4W 144559R103 RES NETWORK 2 X 220K ISO 144678R104 RES MF 40.2K 1% 1/4W 144525R105 RES MF 20K 1% 1/4W 144524R106 RES MF 20K 1% 1/4W 144524R107 RES NETWORK 2 X 220K ISO 144678R108 RES MF 1K 1% 1/4W 144513R109 RES MF 40.2K 1% 1/4W 144525R110 RES MF 221 OHM 1% 1/4W 144559R111 RES MF 40.2K 1% 1/4W 144525R112 RES NETWORK 2 X 220K ISO 144678R113 RES MF 20K 1% 1/4W 144524R114 RES MF 20K 1% 1/4W 144524R115 RES NETWORK 2 X 220K ISO 144678R116 RES MF 10K 1% 1/4W 144504R117 RES MF 10 OHM 1% 1/4W 144553R118 RES MF 10K 1% 1/4W 144504R119 RES MF 365 OHM 1% 1/4W 144505R120 RES MF 3.32K 1% 1/4W 144518R121 RES MF 22.1 OHM 1% 1/4W 144554R122 RES MF 200K 1% 1/4W 144531R123 RES MF 3.32K 1% 1/4W 144518R124 RES MF 332 OHM 1% 1/4W 144646R125 RES MF 8.25K 1% 1/4W 144549R126 RES MF 100K 1% 1/4W 144528R127 RES MF 221 OHM 1% 1/4W 144559R128 RES MF 1M 1% 1/4W 144577R129 RES MF 200K 1% 1/4W 144531R130 RES MF 100K 1% 1/4W 144528R131 RES MF 475 OHM 1% 1/4W 144509R132 RES MF 1K 1% 1/4W 144513R133 RES MF 1K 1% 1/4W 144513R134 RES MF 100K 1% 1/4W 144528R135 RES MF 267K 1% 1/4W 144532R136 RES MF 3.32K 1% 1/4W 144518R137 RES MF 1K 1% 1/4W 144513R138 RES MF 10K 1% 1/4W 144504R139 RES MF 10K 1% 1/4W 144504R140 RES MF 33.2K 1% 1/4W 144694R141 RES MF 200K 1% 1/4W 144531R142 RES MF 221 OHM 1% 1/4W 144559

R143 RES MF 100K 1% 1/4W 144528R144 RES MF 33.2K 1% 1/4W 144694R145 RES MF 221 OHM 1% 1/4W 144559R146 RES MF 100K 1% 1/4W 144528R147 RES MF 1M 1% 1/4W 144577R148 RES MF 221 OHM 1% 1/4W 144559R149 RES MF 20K 1% 1/4W 144524R150 RES MF 100K 1% 1/4W 144528R151 RES MF 22.1K 1% 1/4W 144564R152 RES MF 1K 1% 1/4W 144513R153 RES MF 221 OHM 1% 1/4W 144559R154 RES MF 100K 1% 1/4W 144528R155 RES MF 10K 1% 1/4W 144504R156 RES MF 221 OHM 1% 1/4W 144559R157 RES MF 10K 1% 1/4W 144504R158 RES MF 22.1K 1% 1/4W 144564R159 RES MF 100K 1% 1/4W 144528R160 RES MF 33.2K 1% 1/4W 144694R161 RES MF 22.1K 1% 1/4W 144564R162 RES MF 221 OHM 1% 1/4W 144559R163 RES MF 100K 1% 1/4W 144528R164 RES MF 100 OHM 1% 1/4W 144568R165 RES MF 100K 1% 1/4W 144528R166 RES MF 100 OHM 1% 1/4W 144568R167 RES MF 100K 1% 1/4W 144528R168 RES MF 22.1K 1% 1/4W 144564R169 RES MF 1K 1% 1/4W 144513R170 RES MF 10K 1% 1/4W 144504R171 RES MF 1K 1% 1/4W 144513R172 RES MF 1K 1% 1/4W 144513R173 RES MF 1K 1% 1/4W 144513R174 RES MF 10M 1% 1/4W 144575R175 RES MF 10M 1% 1/4W 144575R176 RES MF 332 OHM 1% 1/4W 144646R177 RES MF 1.82K 1% 1/4W 144582R178 RES MF 1.82K 1% 1/4W 144582R179 RES MF 1.82K 1% 1/4W 144582R180 RES MF 1.82K 1% 1/4W 144582R181 RES MF 3.32K 1% 1/4W 144518R182 RES MF 3.32K 1% 1/4W 144518R183 RES MF 365 OHM 1% 1/4W 144505R188 RES MF 221K 1% 1/4W 144629R189 RES MF 221K 1% 1/4W 144629R192 RES MF 33.2K 1% 1/4W 144694R193 RES MF 33.2K 1% 1/4W 144694R196 RES MF 100K 1% 1/4W 144528R197 RES MF 100K 1% 1/4W 144528R200 RES MF 267K 1% 1/4W 144532R201 RES MF 365 OHM 1% 1/4W 144505R220 RES MF 47.5K 1% 1/4W 144526T1 TRANSFORMER R-CORE POWER 159348U1 IC REGULATOR 5V 133250U2 IC -5V REGULATOR 133253U3 IC DUAL OPERATIONAL AMPLIFIER 133260

MAIN PCB 050329 (cont’d)Ref No. Description Part No. Ref No. Description Part No.

C220

3

PARTS LIST con’t

U4 IC SHFT REG SER-PAR 133186U5 IC STEREO DGTL VOLUME CONTROL 133331U6 IC SHFT REG SER-PAR 133186U7 IC OCTAL DARLNGTON TRANS ARRAY 133258U8 IC SHFT REG SER-PAR 133186U9 IC OCTAL DARLNGTON TRANS ARRAY 133258U10 IC DUAL OPERATIONAL AMPLIFIER 133260U11 IC VOLTAGE REGLTR VARIABLE NEG 133334(U11) HEATSINK TO-220 080017U12 IC VOLTAGE REGLTR VARIABLE POS 133333(U12) HEATSINK TO-220 080017U13 IC SHFT REG SER-PAR 133186U14 IC VOLTAGE REGLTR VARIABLE NEG 133334(U14) HEATSINK TO-220 080017U15 IC VOLTAGE REGLTR VARIABLE POS 133333(U15) HEATSINK TO-220 080017U16 IC REGULATOR +5V 133108(U16) HEATSINK TO-220 080017U17 IC 2 INPUT X 4 133167U18 IC DUAL OPERATIONAL AMPLIFIER 133260U19 IC DUAL OPERATIONAL AMPLIFIER 133260U21 IC DUAL OPERATIONAL AMPLIFIER 133260V1 SOCKET 9 PIN TUBE CERAMIC 178170V3 SOCKET 9 PIN TUBE CERAMIC 178170V5 SOCKET 9 PIN TUBE CERAMIC 178170V7 SOCKET 9 PIN TUBE CERAMIC 17817018574 ASSEMBLY INSERTION PCB MAIN 700138

ASSY INSERTION PCB MAIN 701138

MAIN PCB 050329 (cont’d)Ref No. Description Part No. Ref No. Description Part No.

DISPLAY PCB 050330C1 CAP ELECT 10UF 50V 066445C2 CAP MONO .1UF 50V 20% Z5U 061346C3 CAP ELECT 47UF 35V 066446C4 CAP MONO .1UF 50V 20% Z5U 061346C5 CAP ELECT 10UF 50V 066445C6 CAP ELECT 47UF 16V 066380C7 CAP MONO .1UF 50V 20% Z5U 061346C8 CAP MONO .1UF 50V 20% Z5U 061346C9 CAP ELECT 10UF 50V 066445C10 CAP MONO 220PF 200V 10% NPO 061342C11 CAP MONO .1UF 50V 20% Z5U 061346C12 CAP MONO 220PF 200V 10% NPO 061342C13 CAP MONO 220PF 200V 10% NPO 061342C14 CAP MPF 0.033UF 5% 63VDC 064318C15 CAP MPF 0.033UF 5% 63VDC 064318C16 CAP MPF 0.033UF 5% 63VDC 064318C17 CAP MONO .1UF 50V 20% Z5U 061346C18 CAP MPF 0.033UF 5% 63VDC 064318C19 CAP ELECT 22UF 100V 066574C20 CAP MONO .1UF 50V 20% Z5U 061346C21 CAP ELECT 22UF 100V 066574D1 DIODE SILICON 070174D2 DIODE ZENER 6.2V 5% 500MW 070085D3 DIODE SILICON 070174D4 DIODE SILICON 070174

D5 DIODE SILICON 070174DS1 LED GRN 5MM HI-INTENSITY 058165(DS1) SPACER LED 112108DS2 LED GRN 5MM HI-INTENSITY 058165(DS2) SPACER LED 112108DS3 LED GRN 5MM HI-INTENSITY 058165(DS3) SPACER LED 112108DS4 LED GRN 5MM HI-INTENSITY 058165(DS4) SPACER LED 112108DS5 LED GRN 5MM HI-INTENSITY 058165(DS5) SPACER LED 112108DS6 LED GRN 5MM HI-INTENSITY 058165(DS6) SPACER LED 112108DS7 DISPLAY 12 CHARACTER 058150DS8 LED GRN 5MM HI-INTENSITY 058165(DS8) SPACER LED 112108J1 CONN FFC 18PIN 117765J2 CONN FFC 18PIN 117765J5 CONN FFC 18PIN 117765K1 RELAY REED SPST-NO 5V 1.2A 087078K2 RELAY REED SPST-NO 5V 1.2A 087078K3 RELAY REED SPST-NO 5V 1.2A 087078K4 RELAY REED SPST-NO 5V 1.2A 087078MTGPA1 DBL COATED MTG-TAPE 1/16 THK 094409MTGPA2 DBL COATED MTG-TAPE 1/16 THK 094409MTGPA3 DBL COATED MTG-TAPE 1/16 THK 094409MT1 SENSOR IR 38KHZ 121046Q1 TRANSISTOR PNP 132304Q3 TRANSISTOR NPN 2K/REEL 132317R1 RES MF 475K 1% 1/4W 144604R2 RES MF 10K 1% 1/4W 144504R3 RES MF 100 OHM 1% 1/4W 144568R4 RES MF 475 OHM 1% 1/4W 144509R5 RES MF 10 OHM 1% 1/4W 144553R6 RES MF 47.5K 1% 1/4W 144526R7 RES MF 475 OHM 1% 1/4W 144509R8 RES NET 10K X8 RES BUSSED 144253R9 RES NETWORK 9X-1-223 144238R10 RES MF 324 OHM 1% 1/4W 144597R12 RES MF 100 OHM 1% 1/4W 144568R13 RES MF 47.5K 1% 1/4W 144526R14 RES NETWORK 9X-1-223 144238R15 RES MF 1K 1% 1/4W 144513R16 RES MF 324 OHM 1% 1/4W 144597R17 RES MF 324 OHM 1% 1/4W 144597R18 RES MF 324 OHM 1% 1/4W 144597R19 RES MF 324 OHM 1% 1/4W 144597R20 RES MF 324 OHM 1% 1/4W 144597R22 RES MF 324 OHM 1% 1/4W 144597R21 RES MF 100K 1% 1/4W 144528R23 RES MF 100 OHM 1% 1/4W 144568R24 RES MF 100 OHM 1% 1/4W 144568R25 RES MF 100 OHM 1% 1/4W 144568R26 RES MF 221 OHM 1% 1/4W 144559R27 RES MF 100 OHM 1% 1/4W 144568

41

DISPLAY PCB 050330 (cont’d)Ref No. Description Part No. Ref No. Description Part No.

PARTS LIST con’t

R28 RES MF 2.21K 1% 1/4W 144584R29 RES MF 1K 1% 1/4W 144513R30 RES MF 1K 1% 1/4W 144513R32 RES NETWORK 9X-1-223 144238R33 RES MF 100 OHM 1% 1/4W 144568R34 RES MF 100 OHM 1% 1/4W 144568R35 PC BD TONE 129629(R35) POT EQUAL 134509(R35A) CONN 4 PIN RIGHT ANGLE 117927(R35B) CONN 4 PIN RIGHT ANGLE 117927(R35C) CONN 4 PIN RIGHT ANGLE 117927(R35D) CONN 4 PIN RIGHT ANGLE 117927R39 RES MF 1M 1% 1/4W 144577R43 RES MF 100K 1% 1/4W 144528R44 RES MF 681 OHM 1% 1/4W 144567R46 RES MF 681 OHM 1% 1/4W 144567R45 RES MF 100K 1% 1/4W 144528R47 RES MF 475 OHM 1% 1/4W 144509R48 RES MF 475 OHM 1% 1/4W 144509R40 RES MF 1M 1% 1/4W 144577R41 RES MF 1M 1% 1/4W 144577R42 RES MF 1M 1% 1/4W 144577S1 ENCODER OPTICAL ROTARY 146246S2 SWITCH ROT PULSE 146258S2 PC BD SWITCH 129294(S2) CONN 3-PIN RIGHT ANGLE 117670U1 IC NOR 2 INPUT X 4 133176U2 IC MICRO RESET POS 133241U3 IC CMOS EPROM 133249U4 IC PROGRAMMED V1.00 C220 133584U3 SOCKET IC 8-POS 178096U4 SOCKET IC 40-PIN 178133U6 IC SHFT REG SER-PAR 133186U8 IC DUAL OPERATIONAL AMPLIFIER 133260Y1 CERAMIC RESONATOR 12MHZ 180059Y2 RES MF 8.25K 1% 1/4W 144549Y2 RESONATOR CERAMIC 2.00MHZ 180064

ASSEMBLY INSERTION PCB DISPLAY 700139ASSY INSERTION PCB DISPLAY 701139ASSY DISPLAY PCB SM PART 750360

C1 CAP ELECT 10UF 50V 066445C2 CAP ELECT 10UF 50V 066445C3 CAP ELECT 10UF 50V 066445C4 CAP ELECT 10UF 50V 066445C5 CAP ELECT 10UF 50V 066445C6 CAP ELECT 10UF 50V 066445C7 CAP ELECT 10UF 50V 066445C8 CAP ELECT 10UF 50V 066445C9 CAP ELECT 10UF 50V 066445C10 CAP ELECT 10UF 50V 066445C11 CAP ELECT 10UF 50V 066445C12 CAP ELECT 10UF 50V 066445

4 BALANCED/DATA PCB 050331

42

C13 CAP ELECT 10UF 50V 066445C14 CAP ELECT 10UF 50V 066445C15 CAP ELECT 10UF 50V 066445C16 CAP ELECT 10UF 50V 066445C17 CAP MONO .1UF 50V 20% Z5U 061346C18 CAP MONO .1UF 50V 20% Z5U 061346C19 CAP MONO 1000PF 50V 10% NPO 061344C20 CAP MONO .1UF 50V 20% Z5U 061346D1 DIODE SILICON 070174D2 DIODE SILICON 070174D3 DIODE SILICON 070174J1 CONN XLR FEM HORIZ PCB LATCH 117814J2 CONN XLR FEM HORIZ PCB LATCH 117814J3 CONN XLR FEM HORIZ PCB LATCH 117814J4 CONN XLR FEM HORIZ PCB LATCH 117814J5 RECEPTACLE XLR MALE 117686J6 RECEPTACLE XLR MALE 117686J7 CONN FFC 18PIN 117765J8 CONN FFC 18PIN 117765J9 JACK HEADPHONE DUAL BLACK 1/8 117825J10 JACK HEADPHONE DUAL BLACK 1/8 117825J11 CONN GOLD F RIGHT ANGLE 117661J12 JACK HEADPHONE DUAL BLACK 1/8 117825J13 JACK HEADPHONE DUAL BLACK 1/8 117825J14 JACK HEADPHONE DUAL BLACK 1/8 117825J15 JACK HEADPHONE DUAL BLACK 1/8 117825J16 CONN FFC 18PIN 117765K1 RELAY REED SPST-NO 5V 1.2A 087078K2 RELAY REED SPST-NO 5V 1.2A 087078K3 RELAY REED SPST-NO 5V 1.2A 087078K4 RELAY REED SPST-NO 5V 1.2A 087078K5 RELAY REED SPST-NO 5V 1.2A 087078K6 RELAY REED SPST-NO 5V 1.2A 087078K7 RELAY REED SPST-NO 5V 1.2A 087078K8 RELAY REED SPST-NO 5V 1.2A 087078K9 RELAY REED SPST-NO 5V 1.2A 087078K10 RELAY REED SPST-NO 5V 1.2A 087078PCB1 PC BD BAL/DATA 129628R1 RES MF 221 OHM 1% 1/4W 144559R2 RES MF 221 OHM 1% 1/4W 144559R3 RES MF 221 OHM 1% 1/4W 144559R4 RES MF 221 OHM 1% 1/4W 144559R5 RES MF 100K 1% 1/4W 144528R6 RES MF 100K 1% 1/4W 144528R7 RES MF 267K 1% 1/4W 144532R8 RES MF 267K 1% 1/4W 144532R9 RES MF 267K 1% 1/4W 144532R10 RES MF 267K 1% 1/4W 144532R11 RES MF 267K 1% 1/4W 144532R12 RES MF 267K 1% 1/4W 144532R13 RES MF 267K 1% 1/4W 144532R14 RES MF 267K 1% 1/4W 144532R15 RES MF 267K 1% 1/4W 144532R16 RES MF 267K 1% 1/4W 144532R17 RES MF 267K 1% 1/4W 144532

C220

BALANCED/DATA PCB 050331 (cont’d)Ref No. Description Part No.

TONE PCB 129629 ?????Ref No. Description Part No.

PARTS LIST con’t5

1 PCB Part Number 1296292 LOGOJ1 CONN 4-PIN RIGHT ANGLE 117927J2 CONN 4-PIN RIGHT ANGLE 117927R1 Potentiometer 134457

1 Pushbutton PCB 1296302 LOGODS1 LED SQUARE RED 58109DS2 LED SQUARE RED 58109DS3 LED SQUARE RED 58109DS4 LED SQUARE RED 58109DS5 LED SQUARE RED 58109DS6 LED SQUARE RED 58109DS7 LED SQUARE RED 58109J1 CONN FFC 18PIN 117765S1 SWITCH PB TACT 150058S2 SWITCH PB TACT 150058S3 SWITCH PB TACT 150058S4 SWITCH PB TACT 150058S5 SWITCH PB TACT 150058S6 SWITCH PB TACT 150058S7 SWITCH PB TACT 150058S8 SWITCH PB TACT 150058

7 PUSHBUTTON PCB 050333

1 PCB Part Number 1296342 LOGOJ1 HEADPHONE JACK 117881J2 CONN 12 PIN FFC 117720

? HEADPHONE PCB 050332

43

R18 RES MF 267K 1% 1/4W 144532R19 RES MF 10 OHM 1% 1/4W 144553R20 RES MF 182 OHM 1% 1/4W 144579R21 RES MF 182 OHM 1% 1/4W 144579R22 RES MF 182 OHM 1% 1/4W 144579R23 RES MF 182 OHM 1% 1/4W 144579R24 RES MF 182 OHM 1% 1/4W 144579R25 RES MF 182 OHM 1% 1/4W 144579R26 RES MF 182 OHM 1% 1/4W 144579R27 RES MF 182 OHM 1% 1/4W 144579R28 RES MF 10 OHM 1% 1/4W 144553R29 RES MF 100 OHM 1% 1/4W 144568R30 RES MF 100 OHM 1% 1/4W 144568R31 RES MF 100 OHM 1% 1/4W 144568R32 RES MF 100 OHM 1% 1/4W 144568R33 RES MF 100 OHM 1% 1/4W 144568R34 RES MF 100 OHM 1% 1/4W 144568R35 RES MF 100 OHM 1% 1/4W 144568R36 RES MF 100 OHM 1% 1/4W 144568R37 RES MF 1K 1% 1/4W 144513R38 RES MF 221 OHM 1% 1/4W 144559R39 RES MF 1K 1% 1/4W 144513R40 RES MF 1K 1% 1/4W 144513R41 RES MF 1K 1% 1/4W 144513R42 RES MF 40.2K 1% 1/4W 144525R43 RES MF 22.1K 1% 1/4W 144564U1 IC AND 2 INPUT X 4 133175U2 IC AND 2 INPUT X 4 133175U3 IC 8 LN DRIVER ARRAY 133180U4 IC SHFT REG SER-PAR 133186U5 IC OPERATIONAL AMPLIFIER 13318918574 ASSY INSERTION PCB BAL/DATA 701140

NOTES

44

C220

REPACKING INSTRUCTIONS

45

The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design withoutnotice. Because of the constant upgrading of McIntosh products’ circuitry and components, the Company cannot insure, and does not warrant, theaccuracy 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 040968

C220TUBE PREAMPLIFIER

SERIAL NO. WS1001 And Above