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MS750
MUSIC SERVER
SERIAL NO. XU1001 And Above
CONTENTS
Performance Specifications ..........................................2 Notes...........................................................................2 Safety Information ......................................................2 Rear Panel ...................................................................3 Section Location ..........................................................3 Block Diagram ............................................................4 Interconnection Diagram .............................................5 Front Panel Schematic and PCB ........................... 7 - 10 Parts List ....................................................................11 Repacking List ...........................................................17
SERVICE MANUAL
Serial Number XU1001 And Above
PERFORMANCE SPECIFICATIONS
Audio Specifications
Output Level 2.0Vrms Output Impedance 200 ohms Audio Frequency Response 2Hz to 22,000Hz ±1dB Signal to Noise Ratio 102dB (IHF A-Weighted) Dynamic Range 96dB Harmonic Distortion 0.01% Channel Separation 95dB (1,000Hz) Digital Signal Format Sampling Frequency: 44.1kHz Power Requirements 100 Volts, 50/60Hz at 60 watts 110 Volts, 50/60Hz at 60 watts 120 Volts, 50/60Hz at 60 watts 220 Volts, 50/60Hz at 60 watts 230 Volts, 50/60Hz at 60 watts 240 Volts, 50/60Hz at 60 watts
Note: Refer to the rear panel of the MS750 for the correct voltage.
Video Specifications
Signal System NTSC/PAL Component Video Output Level Y Output Level 1.0Vp-p (75 OHM) PB/CB Output Level 0.648Vp-p (75 OHM) PR /CR Output Level 0.7Vp-p (75 OHM) S-Video Y Output Level 1Vp-p (75 OHM) S-Video C Output Level 0.286Vp-p (75 OHM) (NTSC) Composite Video Output Level 1Vp-p (75 OHM)
Overall Dimensions Width is 17-1/2 inches (44.45cm) Height is 6 inches (15.24cm) Depth is 15-7/8 inches (40.32cm)
Note: When the Disc Tray is opened, the panel clearance required in front of mounting panel is 6-3/4 inches (17.2cm).
Weight 28.1 pounds (12.8Kg) net, 44.5 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)
General Specifications
Digital Output Optical: -15dbm to -21dbm Coaxial: 0.4V p-p to 0.6V p-p /75 ohm
NOTES
1. 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. 2. Unless otherwise specified: a. Resistor values are in ohms. b. Capacitor values are microfarads (uF). c. Inductor values are in microhenries (uH) 3. On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin 1 4. WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recommended by the manufacturer. 5. Use McIntosh Remote Control Model HR063 with the MS750.
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 specified 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 3B Laser (IEC60825-1).
COMPLIES WITH DHHS RULES 21 CFR 1040.10 AND 1040.11
2
MS750
REAR PANEL
SECTION LOCATIONS
TOP VIEW WITH COVER REMOVED
3
NOTES
4
MS750
1
INTERCONNECT
5
NOTES
6
MS750
10 FRONT PANEL
750621 SCH
7
8
MS750
10 FRONT PANEL
750621 PCB
9
10
MS750
PARTS LIST
2 3
320243 MAIN PCB 750822 CHASSIS POWER SUPPLY PCB Ref. No. Description DIODE RECTIFIER 1N4007 FUSE T3 12AH25OV PCB MOUNT DECAL FUSE T3.15AH POWER SUPPLY SWITCH MODE 75W 320256 SERIAL RS232 PCB See Note 320245 AUDIO EXPANSION PCB See Note 320255 SPDIF PCB See Note 320252 S LINK PCB See Note 320244 CD ROM PCB See Note 320242 HARD DRIVE See Note 750621 FRONT PANEL PCB Ref. No. Description C1 CAP MONO .1UF 50V 20% Z5U D1 DIODE SILICON D2 DIODE SILICON D3 DIODE SILICON DS1 LED SQUARE RED DS2 LED SQUARE RED DS3 LED SQUARE RED DS4 LED SQUARE RED DS5 LED GRN 5MM HI-INTENSITY (DS5) SPACER LED DS6 LED GRN 5MM HI-INTENSITY (DS6) SPACER LED DS7 LED GRN 5MM HI-INTENSITY (DS7) SPACER LED DS8 LED GRN 5MM HI-INTENSITY (DS8) SPACER LED DS9 DISPLAY VFD 2X20 CHAR 5X8 DOT DS9 TERMINAL STRIP 14 PIN .025 SQ TUBING SHRINK 1/4ID BLK J1 CONN HEADER SHROUDED 1 X 14 J2 CONN HEADER SHROUDED 1 X 14 J3 CONN HEADER STRAIGHT 1 X 5 J4 TERMINAL STRIP 14 PIN .025 SQ J5 CONN HEADER STRAIGHT 1 X 5 MT1 SENSOR IR 38KHZ
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Ref. No. Description Part No. PCB1 PC BD DISPLAY 129806 Q1 TRANSISTOR PNP SILICON 132304 Q2 TRANSISTOR PNP SILICON 132304 Part No. Q3 TRANSISTOR PNP SILICON 132304 070178 Q4 TRANSISTOR PNP SILICON 132304 089144 Q7 TRANSISTOR PNP SILICON 132304 166304 Q8 TRANSISTOR NPN SILICON 132317 320247 R1 RES MF 2.21K 1% 1/4W 144584 R2 RES MF 221 OHM 1% 1/4W 144559 R3 RES MF 221 OHM 1% 1/4W 144559 R4 RES MF 221 OHM 1% 1/4W 144559 R5 RES MF 324 OHM 1% 1/4W 144597 R6 RES MF 10K 1% 1/4W 144504 R7 RES MF 100 OHM 1% 1/4W 144568 R8 RES MF 100 OHM 1% 1/4W 144568 R9 RES MF 100 OHM 1% 1/4W 144568 R10 RES MF 100 OHM 1% 1/4W 144568 R11 RES MF 1K 1% 1/4W 144513 R12 RES MF 1K 1% 1/4W 144513 S1 SWITCH TACT 150058 S2 SWITCH TACT 150058 S3 SWITCH TACT 150058 S4 SWITCH TACT 150058 S5 SWITCH TACT 150058 S6 SWITCH TACT 150058 S7 SWITCH TACT 150058 S8 SWITCH TACT 150058 S9 SWITCH TACT 150058 Part No. S10 SWITCH TACT 150058 061346 S11 SWITCH TACT 150058 070174 S12 SWITCH TACT 150058 070174 S13 SWITCH TACT 150058 070174 S14 SWITCH TACT 150058 058109 S15 SWITCH TACT 150058 058109 S16 SWITCH TACT 150058 058109 S17 SWITCH TACT 150058 058109 (DS1) LED SPACER .220 LENGTH 163001 058165 (DS2) LED SPACER .220 LENGTH 163001 112108 (DS3) LED SPACER .220 LENGTH 163001 058165 (DS4) LED SPACER .220 LENGTH 163001 112108 C/A DISPLAY 14-1 X 2.0 171823 058165 SCR TS 2-32 X 1/4 PH PN TYPE B 401161 112108 058165 112108 058181 117647 077041 117920 117920 117874 117647 NOTE: 117874 Modules not available as replacement parts. If defect is sus121046 pected in these modules, contact factory for service options. 11
NOTES
12
MS750
REPACKING INSTRUCTIONS
13
MS750
MUSIC SERVER
SERIAL NO. XU1001 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. McINTOSH LABORATORY, INC., 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903 Printed in U.S.A. Part Number 041106