McIntosh MDA 1000 Service Manual
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Performance Specifications ........................................ 2
Notes ......................................................................... 2
Rear Panel .................................................................. 3
Section Location ........................................................ 4
Block Diagram ...................................................... 5 - 6
Interconnection Diagram ...................................... 7 - 8
Main Schematic and PCB ................................... 9 - 18
D/A CONVERTER
CONTENTS
SERVICE MANUAL
Keyboard Supply Schematic and PCB ............... 19 - 20
Display Schematic and PCB .............................. 21 - 22
Dataport Schematic and PCB ............................ 23 - 24
Parts List ............................................................ 25 - 30
Exploded View and Parts List ............................. 31 - 32
Repacking Instructions ............................................. 33

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Summary of Contents for McIntosh MDA 1000

  • Page 1: Table Of Contents

    D/A CONVERTER CONTENTS Performance Specifications ........2 Keyboard Supply Schematic and PCB ....19 - 20 Notes ................. 2 Display Schematic and PCB ......21 - 22 Rear Panel ..............3 Dataport Schematic and PCB ......23 - 24 Section Location ............4 Parts List ............
  • Page 2: Performance Specifications

    PERFORMANCE SPECIFICATIONS Analog Audio Specifications Coaxial Inputs (1, 2 and 3) 0.5V p-p @ 75ohms Frequency Response Optical Inputs (4, 5 and 6) +/-0.5dB from 4Hz to 45,000Hz -15 ~ -20dBm (Sampling Frequency – 96kHz and 88.2kHz) +/-0.3dB from 4Hz to 22,000Hz XRL Input (7) (Sampling Frequency –...
  • Page 3: Rear Panel

    MDA1000 TOP AND REAR PANEL...
  • Page 4: Section Location

    SECTION LOCATIONS DATAPORT MAIN UPSAMPLING TRANSFORMER DISPLAY KEYBOARD TOP VIEW WITH COVER REMOVED...
  • Page 5: Block Diagram

    MDA1000 BLOCK DIAGRAM MUTE LEFT RELAY UNBALANCED COAXIAL LEFT + COAXIAL 24BIT LRCK COAXIAL CONVERTER LEFT + OPTICAL DATA DIGITAL INPUT 768KHz CONV. DIGITAL BYPASS LEFT + UPSAMPLING LEFT + MUTE OPTICAL INTERFACE CONTROL BALANCED LEFT + MODULE FILTER RELAY RECEIVER LRCK LDATA...
  • Page 6 INTERCONNECT DATAPORT MAIN 120V AC 50/60Hz MODULE 049999 240V 220V 120V 100V KEYBOARD POWER DISPLAY...
  • Page 7 MDA1000 MAIN 049988 SH 1 OF 4...
  • Page 8 MAIN 049988 SH 2 OF 4...
  • Page 9 MDA1000 MAIN 049988 SH 3 OF 4...
  • Page 10 MAIN 049988 SH 4 OF 4...
  • Page 11 MDA1000 MAIN 049988 MODULE O49999...
  • Page 12 KEYBOARD 049990 NS5V J1:5 J2:8 SENSOR SETUP LED J1:11 J2:2 J1:8 J2:5 J1:7 J2:6 J1:12 J2:1 1.9V 129485 KBLED J1:10 J2:3 Rev.A SETUP J1:9 J2:4 SETUP * Denotes components on the reverse or backside of the Pc Bd J1:6 J2:7 STBY LED 1.9V J1:4...
  • Page 13 MDA1000 DISPLAY 049989...
  • Page 14 DATAPORT 049991...
  • Page 15: Parts List

    MDA1000 C124 CAP MONO 100PF 100V 10% NPO 061300 CAP ELECT 220UF 25V AUDIO 066414 PARTS LIST C125 CAP MONO 100PF 100V 10% NPO 061300 CAP ELECT 220UF 25V AUDIO 066414 C126 CAP MONO 100PF 100V 10% NPO 061300 CAP ELECT 220UF 25V AUDIO 066414 Ref.
  • Page 16: Parts List

    RECEPTACLE XLR MALE 117686 RES MF 332 OHM 1% 1/4W 144446 PARTS LIST con’t RELAY REED FORM 1C 5V 125 OHM 087056 RES MF 221 OHM 1% 1/4W 144172 RELAY REED FORM 1C 5V 125 OHM 087056 RES MF 221 OHM 1% 1/4W 144172 RES MF 221 OHM 1% 1/4W 144172...
  • Page 17 MDA1000 RES MF 75 OHM 1% 1/4W 144444 R145 RES MF 1K 1% 1/4W 144090 PARTS LIST con’t SWITCH PB TACT 150058 R146 RES MF 1K 1% 1/4W 144090 SWITCH PB TACT 150058 R147 RES MF 1K 1% 1/4W 144090 R148 RES MF 1K 1% 1/4W 144090...
  • Page 18: Exploded View And Parts List

    EXPLODED VIEW and PARTS LIST Part Description 016499 CENTER GLASS PANEL 005396 GOLD STRIP 016500 RIGHT GLASS PANEL 016501 GLASS TOP COVER 094442 FOAM PAD 016498 LEFT GLASS PANEL 017517 PUSHBUTTON ASSY BLK 005365 TRAY 017531 PUSHBUTTON ASSY RED 102064 NUT CAP 6-32 078033 O-RING...
  • Page 19: Repacking Instructions

    MDA1000 REPACKING INSTRUCTIONS...
  • Page 20 SERVICE MANUAL 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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