McIntosh C220 Service Manual
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McIntosh C220 Service Manual

Serial no. ws1001 and above
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See also: Service Manual , Programming Manual
Performance Specifications ........................................ 2
Notes ......................................................................... 2
Rear Panel .................................................................. 3
Section Location ........................................................ 3
Block Diagram ...................................................... 5 - 6
Interconnection Diagram ...................................... 7 - 8
Main Schematic and PCB ................................... 9 - 18
C220

TUBE PREAMPLIFIER

SERIAL NO. WS1001 And Above
CONTENTS

SERVICE MANUAL

Serial Number W S1001 And Above
Display Schematic and PCB .............................. 19 - 24
Balanced/Data Sch and PCB .............................. 25 - 30
Pushbutton Sch and PCB .................................. 31 - 32
Headphone Sch and PCB ................................. 33 - 34
Parts List ............................................................ 37 - 43
Repacking Instructions ............................................. 45
C220

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  • Page 1: Table Of Contents

    C220 C220 TUBE PREAMPLIFIER SERIAL NO. WS1001 And Above CONTENTS Performance Specifications ........2 Display Schematic and PCB ......19 - 24 Notes ................. 2 Balanced/Data Sch and PCB ......25 - 30 Rear Panel ..............3 Pushbutton Sch and PCB ........31 - 32 Section Location ............

  • Page 2: Performance Specifications

    PERFORMANCE SPECIFICATIONS Frequency Response Headphone Output Impedance +0, -0.5dB from 20Hz to 20,000Hz 16 ohms to 250 ohms Total Harmonic Distortion Tube Compliment 0.08% from 20Hz to 20,000Hz Phono Circuitry: 2 - 12AX7A High Level Circuitry: 2 - 12AX7A Main Output 2.5V for rated input Power Requirements 100 Volts, 50/60Hz at 75 watts...

  • Page 3: Rear Panel

    C220 REAR PANEL SECTION LOCATIONS TOP VIEW WITH COVER REMOVED...
  • Page 4 NOTES...

  • Page 5: Block Diagram

    C220 BLOCK DIAGRAM...
  • Page 6 INTERCONNECT...
  • Page 7 C220 MAIN 050329 SCH 1 OF 4...
  • Page 8 MAIN 050329 SCH 2 OF 4...
  • Page 9 C220 MAIN 050329 SCH 3 OF 4...
  • Page 10 MAIN 050329 SCH 4 OF 4...
  • Page 11 C220 MAIN 050329 PCB...
  • Page 12 DISPLAY 050330 SCH 1 of 3...
  • Page 13 C220 DISPLAY 050330 SCH 2 of 3...
  • Page 14 DISPLAY 050330 SCH 3 of 3 and PCB...
  • Page 15 C220 BALANCED / DATA 051331 SCH 1 of 2...
  • Page 16 BALANCED / DATA 050331 SCH 2 of 2...
  • Page 17 C220 BALANCED / DATA 050331 PCB...
  • Page 18 PUSHBUTTON 051332 SCH and PCB...
  • Page 19 C220 HEADPHONE 051333 SCH and PCB...
  • Page 20 NOTES...

  • Page 21: Parts List

    C220 PARTS LIST MAIN PCB 050329 Ref No. Description Part No. Ref No. Description Part No. CAP ELECT 10UF 16V 066580 CAP ELECT 10UF 50V 066445 CAP MONO 47PF 200V 10% NPO 061340 CAP MPF 0.1UF 630VDC 064431 CAP POLYPROP 1UF 20% 250VDC 064433 CAP MONO 47PF 200V 10% NPO 061340...
  • Page 22 PARTS LIST con’t MAIN PCB 050329 (cont’d) Ref No. Description Part No. Ref No. Description Part No. JACK PHONO 8P GOLD PLATED 117455 C123 CAP ELECT 10UF 50V 066445 CONN FFC 18PIN 117765 C125 CAP MONO .1UF 50V 20% Z5U 061346 CONN FFC 18PIN 117765...
  • Page 23 MCD201 C220 PARTS LIST con’t MAIN PCB 050329 (cont’d) Ref No. Description Part No. Ref No. Description Part No. TRANSISTOR N JFET 132318 RES MF 1.5K 1% 1/4W 144539 TRANSISTOR N JFET 132318 RES MF 267K 1% 1/4W 144532 TRANSISTOR N JFET 132318 RES MF 12.1K 1% 1/4W 144550...
  • Page 24 PARTS LIST con’t MAIN PCB 050329 (cont’d) Ref No. Description Part No. Ref No. Description Part No. RES NETWORK 2 X 220K ISO 144678 R143 RES MF 100K 1% 1/4W 144528 RES MF 1M 1% 1/4W 144577 R144 RES MF 33.2K 1% 1/4W 144694 RES MF 47.5K 1% 1/4W 144526...
  • Page 25 C220 PARTS LIST con’t MAIN PCB 050329 (cont’d) Ref No. Description Part No. Ref No. Description Part No. IC SHFT REG SER-PAR 133186 DIODE SILICON 070174 IC STEREO DGTL VOLUME CONTROL 133331 LED GRN 5MM HI-INTENSITY 058165 IC SHFT REG SER-PAR 133186 (DS1) SPACER LED...
  • Page 26 PARTS LIST con’t DISPLAY PCB 050330 (cont’d) Ref No. Description Part No. Ref No. Description Part No. CAP ELECT 10UF 50V 066445 RES MF 2.21K 1% 1/4W 144584 CAP ELECT 10UF 50V 066445 RES MF 1K 1% 1/4W 144513 CAP ELECT 10UF 50V 066445 RES MF 1K 1% 1/4W 144513...
  • Page 27 C220 PARTS LIST con’t TONE PCB 129629 ????? BALANCED/DATA PCB 050331 (cont’d) Ref No. Description Part No. Ref No. Description Part No. PCB Part Number 129629 RES MF 267K 1% 1/4W 144532 LOGO RES MF 10 OHM 1% 1/4W 144553 CONN 4-PIN RIGHT ANGLE 117927 RES MF 182 OHM 1% 1/4W...
  • Page 28 NOTES...

  • Page 29: Repacking Instructions

    C220 REPACKING INSTRUCTIONS...
  • Page 30 SERIAL NO. WS1001 And Above The continuous improvement of its 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.

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