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

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

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).

REAR PANEL

MVP831

SECTION LOCATIONS

TOP VIEW WITH COVER REMOVED

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