McIntosh MCD-205 Service manual

COMPACT DISC

CHANGER

CONTENTS

Performance Specifications ....................................... 2

Notes ......................................................................... 2

Rear View and Section Location ................................. 3

Block Diagram ........................................................... 4

Interconnection Diagram ........................................... 5

SERVICE MANUAL

Audio/Power Schematic and PCB ........................ 7 - 12

Display Schematic and PCB ................................ 13 -16

Parts List ............................................................ 17 - 18

Exploded View and Parts Lists ........................... 19 - 20

Repacking Instructions ............................................. 21

PERFORMANCE SPECIFICATIONS

Frequency Response

+0, -0.5dB from 5Hz to 20,000Hz

Signal T o Noise Ratio
108dB (IHF A-weighted)

Dynamic Range

100dB

Harmonic Distortion

0.002%

Channel Separation

105dB

Maximum Output Level

2.0Vrms Balanced

2.0Vrms Unbalanced

Output Impedance

600 ohms Balanced
600 ohms Unbalanced

Sampling Frequency

44,100Hz

D/A Converter

24-bit dual converters with 8 times over sampling digital
filter

Error Correction

CIRC

Quantization

16-bit linear

T ransport Signal Readout T ype

Semiconductor Optical Laser

Disc Rotational V elocity

200 to 500rpm (constant linear velocity)

Wow and Flutter

Below current measurement limits

Power Requirements

100 Volts, 50/60Hz at 25 watts
110 Volts, 50/60Hz at 25 watts
120 Volts, 50/60Hz at 25 watts
220 Volts, 50/60Hz at 25 watts
230 Volts, 50/60Hz at 25 watts
240 Volts, 50/60Hz at 25 watts

Note: Refer to the rear panel of the MCD205 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 a CD Disc is inserted or ejected,

the panel clearance required in front
of mounting panel is 3-3/4 inches (9.5cm).

Weight

21 pounds (9.5kg) net, 35 pounds (15.9kg) in
shipping carton

Digital Output

Optical: -15dBm to –21dBm
Coaxial: 0.5v p-p/75 ohm

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).

NOTES

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.

MusicBankTM is a registered trademark of the Nakamichi Corporation

2

REAR VIEW

MCD205

SECTION LOCATION

TOP VIEW WITH COVER REMOVED

3

BLOCK DIAGRAM

4