McIntosh C220 Service Manual
Hide thumbs
Also See for C220:
- Service manual (48 pages) ,
- Programming manual (21 pages) ,
- Owner's manual (20 pages)
Advertisement
Quick Links
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
SERVICE MANUAL
C220
TUBE PREAMPLIFIER
SERIAL NO. ZT1001 And Above
CONTENTS
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
Backup Power Supply PCB ................................ 35 - 36
Parts List ............................................................ 37 - 43
Repacking Instructions ............................................. 45
C220
Advertisement
Related Manuals for McIntosh C220
Summary of Contents for McIntosh C220
-
Page 1: Table Of Contents
C220 C220 TUBE PREAMPLIFIER SERIAL NO. ZT1001 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
High Level, 450mV unbalanced, 900mV balanced 240 Volts, 50/60Hz at 75 watts Phono, 4.5mV Standby power, less than 1 watt Note: Refer to the rear panel of the C220 for the Signal To Noise Ratio (A-Weighted) correct voltage. High Level, 90dB below rated output... -
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 750984 SCH 1 OF 4 POWERON DECODER 236V DATA SDATA LEFT DRIVER SCLK SCLK PHONO AMP RESET LCLK 595CS 175V 236V TONE_BYPASS MONO 121V MUTE .1uF SPKR1 120V 221k SPKR2 110V PH_CONTROL HDPH MUTE V5:1 V5:2 J16:1 12AX7A...
- Page 8 MAIN 750984 SCH 2 OF 4 TO DISPLAY J1:3 -15V 236V 22.1k R158 22.1k LEFT VOLUME CONTRO L BUFFE R 170V 236V -5V2 L_OUT 10uF 114V LISAUD-L LEFT 47uF TUB E MUTE .1uF 10uF U3:1 113V 150k LEFT POST ATTENUATOR 100V R174 V1:1...
- Page 9 C220 MAIN 750984 SCH 3 OF 4 LMAIN R138 LEFT + J41:18 J7:1 LEFT + J41:17 J7:2 R139 LEFT - J41:16 J7:3 L_MAIN J16:3 C115 47uF J41:15 LEFT - U18:1 J7:4 LEFT L_MAIN LMAIN OUTPUT J41:14 LEFT BUFFER J7:5 L_OUT...
- Page 10 MAIN 750984 SCH 4 OF 4 POWER J34:1 J1:1 R131 3.32k NEGATIVE 24 VOLT POWERON REGULATOR -24V U17:4 J34:2 IN OUT J1:2 J9:1 -24V -33V R183 RELAY DRIVER +VBU J34:3 R117 J1:3 9.7V VF-24V TUBE_POWER J34:4 J1:4 J9:2 J8:18 J1:1 SEC 1 POSITIVE 24 VOLT J8:17...
- Page 11 C220 MAIN 750984 PCB...
- Page 12 DISPLAY 751002 SCH 1 of 3...
- Page 13 C220 DISPLAY 751002 SCH 2 of 3...
- Page 14 DISPLAY 751002 SCH 3 of 3 and PCB...
- Page 15 C220 BALANCED / DATA 750933 SCH 1 of 2...
- Page 16 BALANCED / DATA 750933 SCH 2 of 2...
- Page 17 C220 BALANCED / DATA 750933 PCB...
- Page 18 PUSHBUTTON 751003 SCH and PCB...
- Page 19 C220 HEADPHONE 750332 SCH and PCB...
-
Page 20: Backup Power Supply Pcb
BACKUP POWER SUPPLY 750985 SCH and PCB AC LINE FILTER AC LINE J6:1 J6:2 PRIMARY AC N J34:4 J5:4 +VBU VOLTAGE SELECTION JUMPERS J34:3 J5:3 J34:2 J5:2 +VBU 100V POWER J34:1 110V J5:1 120V J1:1 J1:2 100V 220V 110V 230V 120V 240V J1:3... -
Page 21: Parts List
C220 PARTS LIST INTERCONNECT Ref No. Description Part No. Ref No. Description Part No. CAP MPF 0.0033UF 5% 63VDC 064455 HOLDER FUSE 178161 CAP ELECT 10UF 16V 066580 RECEPTACLE & LINE FILTER 117946 CAP MPF 0.1UF 630VDC 064431 CAP ELECT 10UF 16V... - Page 22 PARTS LIST con’t MAIN PCB 750984 (cont’d) Ref No. Description Part No. Ref No. Description Part No. C119 CAP ELECT 10UF 50V 066445 BRACKET PCB CARD MOUNTING 003611 C121 CAP MONO .1UF 50V 20% Z5U 061346 (GP2) RIVET 1/8X3/16 STEEL 108011 C122 CAP MONO .1UF 50V 20% Z5U...
- Page 23 C220 PARTS LIST con’t MAIN PCB 750984 (cont’d) Ref No. Description Part No. Ref No. Description Part No. TRANSISTOR PNP SILICON 132304 RES MF 267K 1% 1/4W 144532 TRANSISTOR PNP SILICON 132304 RES MF 1M 1% 1/4W 144577 TRANSISTOR PNP SILICON...
- Page 24 PARTS LIST con’t MAIN PCB 750984 (cont’d) Ref No. Description Part No. Ref No. Description Part No. R144 RES MF 33.2K 1% 1/4W 144694 RES MF 200K 1% 1/4W 144531 RES MF 1K 1% 1/4W 144513 R145 RES MF 221 OHM 1% 1/4W 144559 RES NETWORK 2 X 220K ISO 144747...
- Page 25 133578 RELAY REED SPST-NO 5V 1.2A 087078 INSULATOR ISOSTRATE TO 220 084133 RELAY REED SPST-NO 5V 1.2A 087078 TUBE 12AX7A MCINTOSH 165065 SENSOR IR 38KHZ 121046 (V1) SOCKET 9 PIN TUBE CERAMIC 178170 MTGPA1 DOUBLE COATED MTG-TAPE 1/16” TK 094409...
- Page 26 IC CMOS EPROM 133646 RELAY REED SPST-NO 5V 1.2A 087078 (U3) SOCKET IC 8 POS 178183 RELAY REED SPST-NO 5V 1.2A 087078 IC PROGRAMMED V1.01 C220 133751 RELAY REED SPST-NO 5V 1.2A 087078 (U4) SOCKET IC 40-PIN 178133 PCB1 PCB BAL/DATA...
- Page 27 C220 PARTS LIST con’t BALANCED/DATA PCB 750933 (cont’d) Ref No. Description Part No. Ref No. Description Part No. (DS3) LED SPACER .220 LENGTH 163001 RES MF 267K 1% 1/4W 144532 LED RED 5MM ROUND 058187 RES MF 267K 1% 1/4W...
- Page 28 NOTES...
-
Page 29: Repacking Instructions
C220 REPACKING INSTRUCTIONS... - Page 30 SERIAL NO. ZT1001 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.
Need help?
Do you have a question about the C220 and is the answer not in the manual?
Questions and answers