McIntosh MCD-301 , Original Service Manual

SERVICE MANUAL 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 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 CONTENTS SERIAL NO. YM1001 And Above MCD301 SACD / CD PLAYER Downloaded from www.Manualslib.com manuals search engine

PERFORMANCE SPECIFICATIONS 2 Audio Specifications Fixed Output level 2.0Vrms Unbalanced 4.0Vrms Balanced Variable Output level 0 - 6.0Vrms Unbalanced 0- 12.0Vrms Balanced Output Impedance 600 ohms Unbalanced and Balanced Frequency Response 4Hz to 40,000Hz, +0.5, -3dB (SACD) 4Hz to 20,000Hz, ±0.5dB (CD) Signal to Noise Ratio Better than 110dB (A-weighted) Dynamic Range Better than 100dB Harmonic Distortion 0.002% @ 1000Hz (SACD) 0.003% @ 1000Hz (CD) Channel Separation Better than 98dB (1,000Hz) General Specifications Digital Output Optical: - 15dbm to -21dbm (PCM) Coaxial: 0.5V p-p/75 ohm (PCM) Sampling Frequencies: 44.1kHz (PCM) Transport Laser Type: Twin Beam Laser Beam Wavelength: 650nm (SACD)/790nm (CD) Laser Power: CLASS IIa/CLASS I Power Requirements 100 Volts, 50/60Hz at 35 watts 110 Volts, 50/60Hz at 35 watts 120 Volts, 50/60Hz at 35 watts 220 Volts, 50/60Hz at 35 watts 230 Volts, 50/60Hz at 35 watts 240 Volts, 50/60Hz at 35 watts Standby: Less than 1 watt Note: Refer to the rear panel of the MCD301 for the correct voltage. Overall Dimensions Width is 17-1/2 inches (44.45cm) Height is 6 inches (15.24cm) Depth is 16-1/2 inches (41.91cm) Note: When the Disc Tray is opened, the panel clearance required in front of mounting panel is 6-3/4 inches (17.2cm). Weight 28.2 pounds (12.8Kg) net, 44.6 pounds (20.2Kg) in shipping carton Shipping Carton Dimensions Width is 26-1/2 inches (67.3cm) Depth is 24-1/4 inches (62.2cm) Height is 11-3/4 inches (29.9cm) Downloaded from www.Manualslib.com manuals search engine

MCD301 1. The heavy notes on the schematic denote the primary signal path. 2. Unless otherwise noted, all voltages indicated on the schematics 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 - Positive b. Diodes - Cathode c. Others - Pin 1 5. WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. 6. Use McIntosh Remote Control Model HR056 with the MCD301. NOTES SAFETY INFORMATION CAUTION: Invisible Laser Radiation when open. DO NOT stare into the beam or view directly with optical instruments. Use of controls or adjustments or performance of procedures other than those speci- fied in the Owners Manual may result in Hazardous Radiation Exposure. Servicing of laser mechanism is to be performed at the service facility at McIntosh Laboratory Inc. This product incorporates an embedded Class 3R Laser (IEC60825-1). LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT VAROITUS! Laitteen kayttaminen muulla kuin tassa kayttoohjeessa mainitulla tavalla saattaa altistaa kayttajan turvallisuusluokan 1 ylittavalle nakymattomalle lasersateiiylle. VARNING! Om apparaten anvands pa annat satt an i denna bruksanvisning specificerats, kan anvandaren utsattas for osynbg laserstraining, som overskrider gransen for laserklass 1. 3 Downloaded from www.Manualslib.com manuals search engine

4 NOTES Downloaded from www.Manualslib.com manuals search engine

MCD301 REAR PANEL SECTION LOCATIONS TOP VIEW WITH COVER REMOVED 5 Downloaded from www.Manualslib.com manuals search engine

BLOCK DIAGRAM 6 Downloaded from www.Manualslib.com manuals search engine

MCD301 INTERCONNECT 7 8 120V AC 50/60Hz CX131 MAIN J4 BLK WHT GND GND GND NS3.3V POWER IN POWER GND -12VA GND 12VA GND 5VD GND 3.3VD GND NS5V NS5V GND 18 12 17 11 2 1 NS3.3V POWER GND -12V GND 12V GND 5VD GND 3.3VD 10 1 J3 GND GND GND NS3.3V POWER IN POWER GND -12VA GND 12VA GND 5VD GND 3.3VD GND NS5V NS5V GND J7 18 12 17 11 2 1 3.3VD GND 5VD GND 12V GND -12V GND POWER NS3.3V CY101 10 1 SPDIF GND MUTE MODE GND DSDL/PDL DSDR/PDR GND PLRCK GND PBCK GND MS MDI MC MDO RST PURE DIR MODE 3 GND MCLK GND MCK2 GND DBCK J8 2 13 25 CX251 25 13 1 GND NC NC GND REM OUT GND KEY1 KEY0 DATA CLK CS RST GND CX131 1 13 24 1 SPDIF GND MUTE MODE GND DSDL/PDL DSDR/PDR GND PLRCK GND PBCK GND MS MDI MC MDO RST PURE DIR MODE 3 GND MCLK GND MCK2 GND DBCK LEFT GND RIGHT GND J16 4 1 REM IN REM OUT A2 MUTE LED A3 GND A0 INI A1 CL LEV-D DI LEV-U CE NS5V RST SSTBY/ON GND J1 2 1 17 18 J1 8 7 2 1 GND BACK GND NEXT GND LEV-D 5VD LEV-U J3 8 7 2 1 GND BACK GND NEXT GND LEV-D 5VD LEV-U J4 18 17 2 1 REM IN REM OUT A2 MUTE LED A3 GND A0 INI A1 CL LEV-D DI LEV-U CE NS5V RST STBY/ON GND GND NC NC GND REM OUT GND KEY1 KEY0 DATA CLK CS RST GND J2 12 13 2 1 5VD 3.3VD GND 32V GND F- F+ J1 7 1 LEFT GND RIGHT GND J2 4 1 BLK BLU GRY VIO ORN WHT T1 GRN GRN YEL BLU YEL RED BLK RED 12OVB 20VB 0VB 120VA 100VA 0VA J3 1 6 BLK BLU GRY VIO ORN WHT J6 J5 AC11.5V AC11.5VCT AC11.5V AC26V AC26VCT AC26V AC6V AC6V J2 9 1 YEL BLU YEL RED BLK RED BRN BRN 1 J1 7 5VD 3.3VD GND 3.2V GND F- F+ 2 MECHANISM 3 CONTROL 5 DISPLAY 4 POWER 6 PRIMARY 7 HEADPHONE 8 Downloaded from www.Manualslib.com manuals search engine

9 10 MAIN 750771 SCH 1 OF 3 2 (IO) (IO)(OD) 5V RST CL REM IN .01uF C14 A0 A1 A3 D4 D8 IN MUTE LED LEV-D LEV-U 475k R45 D5 (IO) (OD) (IO) .1uF C22 3.3V REGULATOR POWER CONTROL D6 CONTROL DATA IN IR IN DI CE 100 R9 100 R10 100 R8 2K R17 10k R24 15K R16 MUTE CONT 10k R29 D1 47uF C12 .1uF C13 .1uF C20 A2 1000pF C16 GND 3 B 2 Y 4 A 1 VCC 5 U5 .47uF C19 .1uF C38 15K R25 .1uF C23 1000pF C26 1uF C28 15K R21 8.25k R33 .01uF C36 DRIVER 47uF C32 .1uF C34 47.5 R56 47.5 R55 1 2 L3 D7 1 2 L5 OUT POWER 100 3 4 R1B 100 3 4 R2B 100 1 2 R2A 0 R6 .1uF C24 STBY/ON 0 R14 47.5k R22 47.5k R27 1000pF C21 100k R30 2 1 3 IN OUT U13 8.25k R32 1.5k R34 .1uF C27 4.75M R38 100pF C33 47.5k R47 47.5 R54 1 2 L4 1.5k R53 1000pF C10 5x47k 2 3 4 5 6 1 R7 3 1 2 Q1 3 1 2 Q3 15K R15 15K R11 15K R12 1uF C17 100uF C37 47.5k R18 .1uF C30 562 R52 22.1k R50 22.1k R51 1 2 3 4 5 6 U31 47.5k R37 1k R49 1 2 L2 2 5 1 J5 2 5 1 J3 1000pF C11 100 1 2 R1A 22.1 R20 6.0MHz 1 3 2 Y1 15K R13 4.75M R28 2 1 3 Q7 47.5k R39 2 5 1 J4 2 5 1 J6 GND 3 B 2 Y 4 A 1 VCC 5 U7 GND 3 B 2 Y 4 A 1 VCC 5 U8 TRIG 6 CTLVOL 3 RESET 4 DISCHG 1 OUTPUT 9 CTLVOL 11 THRS 12 VDD 14 GND 7 OUTPUT 5 THRS 2 TRIG 8 RESET 10 DISCHG 13 U9 P1.2 12 P2.2 13 P2.4 15 P1.1 17 P1.0 18 P0.7 19 P0.6 20 P0.5 22 P0.3 24 P0.2 25 P1.7 4 P2.1 2 P2.6 27 VDD 21 P0.4 23 P2.3 14 P1.3 11 P1.4 10 XTAL/P3.1 8 RST/P1.5 6 P1.6 5 P2.5 16 XTAL/P3.0 9 VSS 7 P0.0 3 P0.1 26 P2.7 28 P2.0 1 U2 10uF C7 .1uF C8 OPTICAL OUT .1uF C3 .1uF C1 COAXIAL OUT .1uF C2 150pF C5 1 2 3 FN1 2 1 J2 47uF C4 .1uF C6 47uF C9 18uH L1 332 R4 100 R3 1 3 4 2 T1 1 3 2 GND VCC INPUT OPT1 220uF C40 220uF C39 100uH L6 100uH L7 7 1 6 5 4 2 3 CX B\ A Q R\ Q\ RXCX 16 8 B+ GND U11A 9 15 10 11 12 14 13 CX B\ A Q R\ Q\ RXCX U11B 2 1 3 7 B+ GND 14 U10A 5 4 6 U10B 10 9 8 U10C 13 12 11 U10D SPDIF 5VD GND GND NS5V NS5V GND 3.3VD GND GND GND 12VA -12VA 12VA -12VA 3.3VD 3.3VA 5VA POWER POWER IN NS3.3V GND SCLK DATAI CS REM OUT 0 R5 GND 3 B 2 Y 4 A 1 VCC 5 U3 .1uF C18 GND 3 B 2 Y 4 A 1 VCC 5 U12 .1uF C31 .1uF C35 47.5k R48 1k R44 2 1 3 Q5 3 1 2 Q4 681 R43 4.75k R46 10k R40 4.7 R42 4.7 R41 D3 3300uF C29 3 1 2 Q2 47.5k R19 -11.5VA MUTE 4.75k R23 GND 3 B 2 Y 4 A 1 VCC 5 U4 GND 3 B 2 Y 4 A 1 VCC 5 U6 0 R31 .47uF C15 OMUTE HMUTE 22uF C25 100k R36 332 R35 D2 2 1 3 7 B+ GND 14 U1A 5 4 6 U1B 10 9 8 U1C 13 12 11 U1D 47.5k R26 NS5V GND INI GND J1 1 J1 2 J1 3 J1 4 J1 5 J1 6 J1 7 J1 8 J1 9 J1 10 J1 11 J1 12 J1 13 J1 14 J1 5 J1 16 J1 17 J1 18 J7 1 J7 2 J7 3 J7 4 J7 5 J7 6 J7 7 J7 8 J7 9 J7 10 J7 11 J7 12 J7 13 J7 14 J7 15 J7 16 J7 17 J7 18 GND GND 100k R210 .47uF C150 220uF C148 .1uF C149 GNDC .1uF C147 * 15K R208 J4 1 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 J4 15 J4 13 J4 11 J4 9 J4 8 J4 7 J4 6 J4 5 J4 14 J4 3 J4 18 J4 17 J4 16 J4 14 J4 12 J4 10 J4 2 J4 1 J4 2 J4 3 J4 4 J4 5 J4 6 J4 7 J4 8 J4 9 J4 1 J4 1 J4 1 J4 1 J4 1 J4 1 J4 1 J4 1 J4 1 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 Downloaded from www.Manualslib.com manuals search engine

MCD301 MAIN 750771 SCH 2 OF 3 2 11 12 LEFT 4 1 3 2 G S - + J11 4 1 3 2 G S - + J12 2.94k R100 RIGHT+ FILTER 2.21k R107 LEFT+ FILTER RIGHT UNBALANCED OUTPUT RIGHT OUTPUT UNBALANCED LEFT BALANCED .1uF C45 10uF C46 .1uF C58 10uF C56 10uF C62 .1uF C55 10uF C57 47uF C74 2.94k R105 100 R104 2.94k R103 2.94k R102 100 R101 RIGHT- FILTER 330pF C83 2.21k R108 330pF C81 LEFT- FILTER 2.21k R106 330pF C80 1.33k R119 .0022uF C85 1.33k R118 .0022uF C84 .001uF C91 .001uF C90 .001uF C89 .001uF C88 47uF C101 47uF C100 47uF C99 10uF C94 47uF C98 5.62 R122 47uF C97 47uF C96 499 R135 499 R134 499 R133 .1uF C109 499 R132 499 R131 499 R130 3 J10B 2 J10A .1uF C108 OUTPUT BALANCED OUTPUT .1uF C47 .1uF C59 .1uF C75 11k R90 2.21k R109 330pF C82 10uF C95 5.62 R123 .1uF C110 .1uF C111 2.67k R116 2.67k R115 2.67k R113 2.21k R95 .1uF C93 2.21k R99 .0033uF C77 2.67k R117 1.33k R121 .0022uF C87 6 5 7 - + U20B FIXED RIGHT UNBALANCED OUTPUT DRIVER 2.21k R98 .0033uF C76 2 3 1 - + 8 4 B+ B- U20A 2.67k R114 2.21k R97 1.33k R120 .0022uF C86 FIXED LEFT UNBALANCED OUTPUT DRIVER .0033uF C78 2.67k R112 2.67k R110 47.5k R129 FIXED RIGHT- BALANCED OUTPUT DRIVER FIXED RIGHT+ BALANCED OUTPUT DRIVER 2 3 1 - + 8 4 B+ B- U23A .1uF C92 47.5k R126 47.5k R125 6 5 7 - + U22B 47.5k R124 2 3 1 - + 8 4 B+ B- U22A 1 2 3 FN2 18uH L8 12 13 10 7 8 5 2 3 17 16 19 22 21 24 27 26 9 11 14 1 4 6 20 18 15 28 25 23 MC MDO VDD M\S\ DGND SCK PDATA DSDR DBCK IREF MDI R\S\T\ DSDL PBCK VCC2R AGND3R IOUTR+ AGND1 VCOMR VCOML AGND2 IOUTL+ IOUTL- AGND3L IOUTR- VCC1 VCC2L PLRCK U15 6 5 7 - + U21B 2 3 1 - + 8 4 B+ B- U19A .0033uF C79 2.67k R111 6 5 7 - + U19B 2 3 1 - + 8 4 B+ B- U21A 47.5k R128 FIXED LEFT- BALANCED OUTPUT DRIVER 47.5k R127 FIXED LEFT+ BALANCED OUTPUT DRIVER 6 5 7 - + U23B 3 2 1 Q8 3 2 1 Q9 3 2 1 Q10 3 2 1 Q11 3 2 1 Q12 3 2 1 Q13 100 R136 100 R137 100 R139 100 R138 100 R140 100 R141 1k R142 1k R143 1k R144 1k R145 1k R146 1k R147 47uF C103 47uF C104 47uF C102 47uF C105 47uF C106 47uF C107 OMUTE -12VA -11.5VA 12VA 11.5VA LEFT+ LEFT- RIGHT+ RIGHT- -11.5VA 11.5VA 11.5VA -11.5VA 11.5VA -11.5VA 11.5VA -11.5VA -11.5VA 11.5VA -11.5VA 2 3 1 - + 8 4 B+ B- U17A 6 5 7 - + U17B .0022uF C66 .0022uF C67 365 R91 365 R86 365 R92 365 R87 470uF C70 470uF C71 150 R78 150 R80 2.67k R79 2.67k R81 100pF C65 FIXED FIXED FIXED FIXED 2 3 1 - + 8 4 B+ B- U18A 6 5 7 - + U18B .0022uF C68 .0022uF C69 365 R93 365 R88 365 R94 365 R89 470uF C72 470uF C73 150 R82 150 R84 2.67k R83 2.67k R85 100pF C64 11.5VA -11.5VA 11.5VA -11.5VA LEFT- I/V CONVERTER LEFT+ I/V CONVERTER RIGHT- I/V CONVERTER RIGHT+ I/V CONVERTER 5VA 47uF C60 47uF C61 10k R77 47.5 R67 3.3VA GND 2 E/D 1 OUT 3 VDD 4 Y2 12 GND 13 A13 15 A15 17 CLK1/I 18 B0 20 22 43 A0/GOEO 44 41 38 39 36 34 11 9 VCCO 6 A8 7 A7 4 TDI 1 A5 2 A9 8 10 A12 14 A6 3 GND 5 A14 16 CLK2/I 19 B1 21 42 35 37 40 23 25 27 28 30 32 33 24 26 29 31 A1 45 A2 46 A3 47 A4 48 U14 100uF C53 .1uF C54 1 2 3 FN3 47.5 R75 47.5 R76 10k R73 .1uF C51 .1uF C44 .1uF C43 .1uF C50 100pF C48 100pF C52 100pF C49 J8 1 J8 2 J8 3 J8 4 J8 5 J8 6 J8 7 J8 8 J8 9 J8 10 J8 11 J8 12 J8 13 J8 14 J8 15 J8 16 J8 17 J8 18 J8 19 J8 20 J8 21 J8 22 J8 23 SPDIF GND MUTE GND DSDL/PDL DSDR/PDR GND PLRCK GND GND MS MDI MC MDO RST PURE DIR MODE3 GND MCLK GND MCK2 GND DBCK MODE PBCK J8 25 J9 1 J9 2 J9 3 J9 4 J9 5 J9 6 J9 7 J9 8 J9 9 J9 10 2K R74 47uF C42 332 R72 100pF C41 3.3VD 22.1 R57 22.1 R58 22.1 R59 22.1 R60 22.1 R62 22.1 R69 22.1 R71 47.5 R70 J8 24 2 3 1 12 13 4 5 VL VDD VSS GND U16A 15 14 16 U16B 10 11 9 U16C 7 6 8 U16D -11.5VA 11.5VA .1uF C63 47.5 R66 47.5 R65 47.5 R64 47.5 R63 SPDIF MUTE 8x47k 2 3 4 5 6 7 8 9 1 R68 47.5k R61 2.55k R96 CX251 25 CX251 24 CX251 23 CX251 22 CX251 21 CX251 20 CX251 19 CX251 18 CX251 17 CX251 16 CX251 15 CX251 14 CX251 13 CX251 12 CX251 11 CX251 10 CX251 9 CX251 8 CX251 7 CX251 6 CX251 5 CX251 4 CX251 3 CX251 1 CX251 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 -4.4V -4.4V -4.4V -4.4V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V Downloaded from www.Manualslib.com manuals search engine

MAIN 750771 SCH 3 OF 3 2 13 14 10k R159 D13 .1uF C144 4.75k R198 Idle 4.5mA GND GND LEFT .0022uF C113 22uF C117 22uF C116 10k R158 47uF C131 47.5k R168 47uF C129 47.5k R167 47.5k R166 47uF C127 47.5k R165 47.5k R164 3 J13B .1uF C139 2 J13A .1uF C138 4 1 3 2 G S - + J14 LEFT HEADPHONE OUTPUT DRIVER 4.75k R201 2 1 3 Q23 .1uF C143 4.75k R200 2 1 3 Q22 4.75k R199 2 1 3 Q21 .1uF C142 2 1 3 Q20 100 R207 100 R206 RIGHT .0022uF C112 47uF C130 47.5k R169 47uF C128 47uF C126 .1uF C146 4 1 3 2 G S - + J15 .1uF C145 D12 10 R196 J16 4 D10 .0022uF C115 RIGHT VARIABLE OUTPUT FILTER 2.67k R150 2.67k R151 1.33k R153 2.67k R149 1.33k R154 .0022uF C114 LEFT VARIABLE OUTPUT FILTER 2.67k R148 22uF C124 LEFT- BALANCED VARIABLE OUTPUT DRIVER VARIABLE RIGHT UNBALANCED OUTPUT RIGHT UNBALANCED VARIABLE OUTPUT DRIVER 499 R175 10k R162 10k R163 499 R174 499 R173 LEFT UNBALANCED VARIABLE OUTPUT DRIVER 499 R171 10k R160 10k R161 VARIABLE LEFT BALANCED OUTPUT 10 R205 10 R197 10 R204 J16 2 10 R195 10 R202 J16 1 10 R194 D9 1.33k R152 1.33k R155 RIGHT- BALANCED VARIABLE OUTPUT DRIVER 22uF C125 LEFT+ BALANCED VARIABLE OUTPUT DRIVER 499 R172 VARIABLE RIGHT BALANCED OUTPUT 499 R170 J16 3 2 1 3 4 K2 10 R203 2 1 3 4 K1 D11 RIGHT+ BALANCED VARIABLE OUTPUT DRIVER RIGHT HEADPHONE OUTPUT DRIVER 1 4 6 7 8 2 3 5 - + U29 22pF C140 22.1k R193 100k R190 1 4 6 7 8 2 3 5 - + U30 22.1k R191 100k R192 22pF C141 3 2 1 Q14 3 2 1 Q15 3 2 1 Q18 3 2 1 Q19 3 2 1 Q17 3 2 1 Q16 100 R178 100 R180 100 R181 100 R179 100 R177 100 R176 47uF C132 47uF C135 47uF C137 47uF C134 47uF C133 47uF C136 1k R182 1k R187 1k R184 1k R185 1k R186 1k R183 2 3 1 - + 8 4 B+ B- U27A 6 5 7 - + U27B 2 3 1 - + 8 4 B+ B- U28A 6 5 7 - + U28B 2 3 1 - + 8 4 B+ B- U26A 6 5 7 - + U26B 2 3 1 - + 8 4 B+ B- U24A 6 5 7 - + U24B 12VA -12VA 12VA -12VA -11.5VA 11.5VA -11.5VA 11.5VA 11.5VA -11.5VA -11.5VA 11.5VA HMUTE OMUTE LEFT+ LEFT- RIGHT+ RIGHT- 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 ZCEN DATAO DATAI ANR AGNDR AOUT R VA+ VA- AOUTL AGNDL ANL M\U\T \E\ SCLK VD+ C\S\ DGND U25 100k R156 100k R157 10uF C118 .1uF C119 SCLK DATAI CS 10uF C120 10uF C123 .1uF C121 .1uF C122 -11.5VA 11.5VA 18uH L9 5VA LEVEL CONTROL VARIABLE LEFT UNBALANCED OUTPUT 2.55k R188 2.55k R189 J J J J 8 8 8 8 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V Downloaded from www.Manualslib.com manuals search engine