McIntosh MVP-831 Service manual
COMPACT DISC TRANSPORT
CONTENTS
Performance Specifications........................................ 2
Notes ......................................................................... 2
Safety Information..................................................... 2
Rear Panel.................................................................. 3
Section Location ........................................................ 3
Block Diagram........................................................... 4
Interconnection Diagram ...................................... 5 - 6
SERVICE MANUAL
Main ..................................................................... 7 - 8
A/V Power Supply Schematic and PCB ............... 9 - 12
Display Schematic and PCB.............................. 13 - 16
Parts List ............................................................ 15 - 16
Exploded View and Parts List............................. 17 - 18
Repacking Instructions ............................................. 19
Signal System
NTSC
S-Video Y Output Level
1Vp-p (75 OHM)
S-Video C Output Level
0.286Vp-p (75 OHM) (NTSC)
Video Output Level
1Vp-p (75 OHM)
Audio Specifications
Number of Channels
2
Output level
2.2Vrms
General SpecificationsVideo Specifications
Digital Output
Optical: -15dbm to -21dbm
Coaxial: 0.5V p-p/75 ohm
Digital Signal Format
Sampling Frequency: 44.1kHz & 48kHz
Transport
Laser Beam Wavelength: 655nm
Laser Power CLASS II
Power Requirements
100 Volts, 50/60Hz at 28 watts
110 Volts, 50/60Hz at 28 watts
120 Volts, 50/60Hz at 28 watts
220 Volts, 50/60Hz at 28 watts
230 Volts, 50/60Hz at 28 watts
240 Volts, 50/60Hz at 28 watts
DVD Frequency Response
4-22KHz (48KHz Sampling, Linear Audio)
4-44KHz (96KHz Sampling, Linear Audio)
CD Frequency Response
4-20KHz
CD Signal to Noise Ratio
Better than 110dB (A-weighted)
DVD Dynamic Range
Better than 100dB (Linear Audio)
CD Dynamic Range
Better than 98dB
Harmonic Distortion
0.003% (1KHz)
Channel Separation
Better than 110dB (1KHz)
Note: Refer to the rear panel of the MVP831 for the correct
voltage.
Dimensions
Front Panel:17-1/2 inches (44.5cm) wide, 5-3/8
inches (13.7cm) high, depth behind front mounting
panel is 15 inches (38.1cm) including clearance for
connectors. Panel clearance required in front of
mounting panel is 3/4 inch (1.9cm).
Note: When the DVD/CD tray is opened, the panel clearance
required in front of mounting panel is 6-3/4 inches (17.2cm).
Weight
20 pounds (9.0Kg) net, 34 pounds (15.4Kg) in
shipping carton
PERFORMANCE SPECIFICATIONS
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.
VIDEO SPECIFICATIONS
Signal System: NTSC
S-Video Y Output Level: 1Vp-p (75 ohm)
S-Video C Output Level: 0.286Vp-p (75 ohm) (NTSC)
Video Output Level: 1Vp-p (75 ohm)
AUDIO SPECIFICATIONS
Number Of Channels: 2
Output Level: 2.2Vrms
DVD Frequency Response 4-22kHz (48kHz Sampling, Linear
Audio)
4-44kHz (96kHz Sampling, Linear
Audio)
CD Frequency Response: 4-20kHz
CD Signal To Noise Ratio: Better than 110dB (A-weighted)
DVD Dynamic Range: Better than 100dB (Linear Audio)
CD Dynamic Range: Better than 98dB
Harmonic Distortion: 0.003% (1kHz)
Channel Separation: Better than 110dB (1kHz)
GENERAL SPECIFICATIONS
Digital Output
Optical: -15dbm to -21dbm
Coaxial: 0.5V p-p/75 ohm
NOTES
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).
Transport
Laser Power: CLASS II
Laser Beam Wavelength: 655nm
Digital Signal Format
Sampling Frequency: 44.1kHz and 48kHz
Power Requirements
100 Volts, 50/60Hz at 30 watts
110 Volts, 50/60Hz at 30 watts
120 Volts, 50/60Hz at 30 watts
220 Volts, 50/60Hz at 30 watts
230 Volts, 50/60Hz at 30 watts
240 Volts, 50/60Hz at 30 watts
Note: Refer to the rear panel of the MVP831 for the correct voltage.
Dimensions
Front Panel:17-1/2 inches (44.5cm) wide, 5-3/8 inches
(13.7cm) high, depth behind front mounting panel is 15 inches
(38.1cm) including clearance for connectors. Panel clearance
required in front of mounting panel is 3/4 inch (1.9cm).
Note: When the DVD/CD tray is opened, the panel clearance required
in front of mounting panel is 6-3/4 inches (17.2cm).
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 recommended by the manufacturer.
SAFETY INFORMATION
CAUTION: The use of optical instruments with this
product will increase eye hazard.
This product utilizes a class 1 laser. Invisible laser
radiation is emitted from the optical pickup lens when the
unit is turned on.
1. Do not look directly into the pickup lens.
2. Do not use optical instruments to look at the pickup
lens.
3. Do not adjust the preset variable resistor on the
optical pickup.
4. Do not disassemble the optical pickup unit.
5. Use of controls or adjustment or performance of
procedures other than those specified herein may
result in hazardous radiation exposure.
6. Replace optical pickup only with manufacturers
specified type.
Laser output: 0.65mW
Wavelength: 665nm
This product utilizes an embedded class 2 laser (IEC825).
2
REAR PANEL
MVP831
SECTION LOCATIONS
TOP VIEW WITH COVER REMOVED
3