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McIntosh MCD301 Service Manual

McIntosh MCD301 Service Manual

Ym1001 sacd / cd player
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Performance Specifications ..........................................2
Notes ...........................................................................3
Safety Information ......................................................3
Rear Panel ...................................................................5
Section Location ..........................................................5
Block Diagram ............................................................6
Interconnection Diagram ........................................7 - 8
Main Schematic and PCB .................................... 9 - 16
MCD301
SACD / CD PLAYER
SERIAL NO. YM1001 And Above
CONTENTS
SERVICE MANUAL
Display Schematic and PCB................................17 - 20
Control Schematic and PCB ................................21 - 22
Power Schematic and PCB ..................................23 - 24
Primary Schematic and PCB ...............................27 - 28
Headphone Schematic and PCB .........................29 - 30
Parts List .............................................................31 - 36
Repacking Instructions ...............................................37

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Summary of Contents for McIntosh MCD301

  • Page 1: Table Of Contents

    MCD301 SACD / CD PLAYER SERIAL NO. YM1001 And Above CONTENTS Performance Specifications ..........2 Display Schematic and PCB........17 - 20 Notes ................3 Control Schematic and PCB ........21 - 22 Safety Information ............3 Power Schematic and PCB ........23 - 24 Rear Panel ..............5 Primary Schematic and PCB .......27 - 28...
  • Page 2: Performance Specifications

    240 Volts, 50/60Hz at 35 watts 4Hz to 40,000Hz, +0.5, -3dB (SACD) Standby: Less than 1 watt 4Hz to 20,000Hz, ±0.5dB (CD) Note: Refer to the rear panel of the MCD301 for the correct voltage. Signal to Noise Ratio Overall Dimensions Better than 110dB (A-weighted) Width is 17-1/2 inches (44.45cm)
  • Page 3: Notes

    Use only replacement parts recom- mended by the manufacturer. 3. Unless otherwise specified: a. Resistor values are in ohms. 6. Use McIntosh Remote Control Model HR056 with the b. Capacitor values are microfarads (uF). MCD301. c. Inductor values are in microhenries (uH).
  • Page 4 NOTES...
  • Page 5: Rear Panel

    MCD301 REAR PANEL SECTION LOCATIONS TOP VIEW WITH COVER REMOVED...
  • Page 6: Block Diagram

    BLOCK DIAGRAM...
  • Page 7 MCD301 INTERCONNECT 120V AC 50/60Hz NS3.3V NS3.3V POWER IN POWER IN POWER POWER MAIN -12VA -12VA 12VA 12VA 3.3VD 3.3VD NS5V NS5V NS5V NS5V POWER NS3.3V POWER -12V SPDIF SPDIF MUTE MUTE MODE MODE DSDL/PDL DSDL/PDL CY101 3.3VD DSDR/PDR DSDR/PDR...
  • Page 8 MAIN 750771 SCH 1 OF 3 COAXIAL OUT 100uH J7 14 3.3VD 10uF J4 14 3.3VD 3.3VA J7 13 .1uF J4 13 J7 12 J4 12 100uH .1uF 47.5k J7 11 J4 11 100k J7 10 12VA 12VA J4 10 22.1 OPTICAL OUT HMUTE...
  • Page 9 MCD301 MAIN 750771 SCH 2 OF 3 LEFT+ FIXED LEFT+ R110 -11.5VA BALANCED OMUTE 2.67k OUTPUT DRIVER -11.5VA C103 R130 R136 47uF 47uF 11.5VA U22A 22.1 SPDIF J8 25 U16A CX251 1 R142 R106 2.21k J8 24 47.5k 18uH 11.5VA...
  • Page 10 MAIN 750771 SCH 3 OF 3 -11.5VA OMUTE C126 C132 R170 R176 47uF 47uF LEFT+ BALANCED VARIABLE U27A OUTPUT DRIVER R182 11.5VA R193 VARIABLE 22.1k LEFT R160 BALANCED OUTPUT R190 100k R161 C140 22pF 12VA 4.75k R198 C127 C133 R171 R177 R194 47uF...
  • Page 11 MCD301 MAIN 750771 PCB...
  • Page 12 DISPLAY 750773 SCH J1:2 J1:1 18uH J1:4 3.3VD J1:6 R17C J1:3 J4:7 R17D J1:5 J4:9 R17B J1:7 47.5k 2.87k 3.32k J4:5 R17A J4:3 J2:1 CX131:13 R10A 5x47k J2:2 CX131:12 R10D J2:3 CX131:11 J4:13 R10B J2:4 CX131:10 R10C DATA J2:5 CX131:9 KEY0 J2:6 CX131:8...
  • Page 13 MCD301 DISPLAY 750773 PCB...
  • Page 14 CONTROL 750295 SCH and PCB J1 2 J3 2 BACK J1 7 J3 7 NEXT J1 5 J3 5 LEV-D J1 3 J3 3 J1 4 J3 4 J1 6 J3 6 LEV-U J1 1 J3 1 J1 8 J3 8 .1uF .1uF .1uF...
  • Page 15 MCD301 POWER 750772 SCH J4:1 J7:18 J4:2 NS5V J7:17 J4:3 NS5V J7:16 J4:4 J7:15 J3:1 3.3VD AC14V J2:9 CY101:1 T1:RED 3.3V REGULATOR T2AL AC14VCT J2:8 J4:5 3.3VD T1:BLK IN OUT J7:14 AC14V J2:7 J3:2 T1:RED CY101:2 T2AL J4:6 J7:13 5V REGULATOR...
  • Page 16 POWER 750772 PCB...
  • Page 17 MCD301 PRIMARY 750614 SCH and PCB 120V B J1:1 20V B J1:2 0V B J1:3 120V A J1:4 100V A J1:5 0V A J1:6 120V B J2:1 20V B J2:2 0V B J2:3 120V A J2:4 100V A J2:5 0V A...
  • Page 18 HEADPHONE 750296 SCH and PCB LEFT J2:4 J16:1 J2 3 J16 2 RIGHT J2:2 J16:3 J2:1 J16:4...
  • Page 19: Parts List

    MCD301 PARTS LIST Ref No. Description Part No. CAP ELECT 47UF 16V 066380 CAP ELECT 10UF 16V 066580 CAP MONO .1UF 50V 20% Z5U 061346 MAIN PCB 750771 Ref No. Description Part No. CAP MONO 100PF 100V 10% NPO 061341...
  • Page 20 PARTS LIST Ref No. Description Part No. con’t CHOKE 18UH 5%-10% 122394 BEADS FERRITE LEADED 076023 MAIN PCB 750771 (cont’d) BEADS FERRITE LEADED 076023 Ref No. Description Part No. BEADS FERRITE LEADED 076023 C125 CAP ELECT 22UF 100V 066574 BEADS FERRITE LEADED 076023 C126 CAP ELECT 47UF 16V...
  • Page 21 MCD301 PARTS LIST con’t Ref No. Description Part No. RES MF 365 OHM 1% 1/4W 144505 MAIN PCB 750771 (cont’d) RES MF 365 OHM 1% 1/4W 144505 Ref No. Description Part No. RES MF 365 OHM 1% 1/4W 144505 RES MF 8.25K 1% 1/4W 144549 RES MF 2.21K 1% 1/4W...
  • Page 22 PARTS LIST Ref No. Description Part No. con’t SINGLE 2-INPUT NAND GATE 133501 SINGLE 2-INPUT AND GATE 133552 MAIN PCB 750771 (cont’d) SINGLE 2-INPUT AND GATE 133552 Ref No. Description Part No. SINGLE 2-INPUT OR GATE 133516 R155 RES MF 1.33K 1% 1/4W 144619 SINGLE 2-INPUT AND GATE 133552...
  • Page 23 MCD301 PARTS LIST con’t Ref No. Description Part No. CONTROL PCB 750295 DISPLAY PCB 750773 (cont’d) CAP MONO .1UF 50V 20% Z5U 061346 Ref No. Description Part No. CAP MONO .1UF 50V 20% Z5U 061346 CAP MONO .1UF 50V 20% Z5U...
  • Page 24 PARTS LIST Ref No. Description Part No. con’t RES MF 10K 1% 1/4W 144504 RES MF 249 OHM 1% 1/4W 144721 POWER PCB 750772 (cont’d) RES MF 249 OHM 1% 1/4W 144721 Ref No. Description Part No. RES MF 10K 1% 1/4W 144504 DIODE SIL 400 PIV @ 1.5A 070031...
  • Page 25: Repacking Instructions

    #10-32 x 3/4” screw carton or any of the interior part(s) are needed, please 404080 #10-7/16” Flat washer call or write Customer Service Department of McIntosh Laboratory. Refer to page 4. Please see the Part List for the correct part numbers.
  • Page 26 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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