McIntosh MS750, Service Manual

2

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 specifi ed:
  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 recom-  
  mended by the manufacturer.
5. Use McIntosh Remote Control Model HR063 with the MS750.

NOTES

SAFETY INFORMATION

PERFORMANCE SPECIFICATIONS

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 specifi ed 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)

.

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.

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)

Audio Specifi cations

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)

Video Specifi cations

Signal System – 

NTSC/PAL

Component Video Output Level

Y   

Output Level 1.0Vp-p (75 OHM)

P

B

/C

B 

Output Level 0.648Vp-p (75 OHM)

P

R

/C

R

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)

General Specifi cations

Digital Output

Optical:  -15dbm to -21dbm
Coaxial:  0.4V p-p to 0.6V p-p /75 ohm

COMPLIES WITH DHHS RULES

21 CFR 1040.10 AND 1040.11