McIntosh MCD205 User manual

SERVICE MANUAL
Performance Specifications ....................................... 2
Notes ......................................................................... 2
Rear View and Section Location ................................. 3
Block Diagram ........................................................... 4
Interconnection Diagram ........................................... 5
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
CONTENTS
COMPACT DISC
CHANGER

PERFORMANCE SPECIFICATIONS
2
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).
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 recom-
mended by the manufacturer.
MusicBankTM is a registered trademark of the Nakamichi Corporation
NOTES
FrequencyResponse
+0,-0.5dBfrom5Hzto20,000Hz
SignalToNoiseRatio
108dB(IHF A-weighted)
DynamicRange
100dB
HarmonicDistortion
0.002%
ChannelSeparation
105dB
MaximumOutputLevel
2.0VrmsBalanced
2.0Vrms Unbalanced
OutputImpedance
600ohmsBalanced
600 ohms Unbalanced
SamplingFrequency
44,100Hz
D/AConverter
24-bit dual converters with 8 times over sampling digital
filter
ErrorCorrection
CIRC
Quantization
16-bitlinear
DigitalOutput
Optical:-15dBm to–21dBm
Coaxial:0.5v p-p/75ohm
TransportSignalReadoutType
Semiconductor Optical Laser
DiscRotationalVelocity
200 to 500rpm (constant linear velocity)
WowandFlutter
Belowcurrentmeasurement limits
PowerRequirements
100Volts,50/60Hz at 25watts
110Volts, 50/60Hzat25 watts
120Volts,50/60Hz at 25watts
220Volts,50/60Hz at 25watts
230Volts,50/60Hz at 25watts
240Volts,50/60Hz at 25watts
Note: Refer to the rear panel of the MCD205 for the
correct voltage.
Dimensions
FrontPanel: 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

REAR VIEW
3
MCD205
SECTION LOCATION
TOP VIEW WITH COVER REMOVED

BLOCK DIAGRAM
4

INTERCONNECT
1
MCD205
5

NOTES
6

7 8
MCD205
2
AUDIO/POWER 049730 SH 1 OF 2

98

10 11
2
AUDIO/POWER 049730 SH 2 OF 2

121

19 20
EXPLODED VIEW and PARTS LIST
1 016468 GLASS
2 148073 SWITCH DPDT ROCKER
3 017531 PUSHBUTTON ASSY RED
4 017517 PUSHBUTTON ASSY BLK
5 078033 O-RING
6 017879 BEZEL GLASS
7 094016 TAPE FOAM 1/4 X 1/8
8 098113 CORD DIAL .027 BLACK BRAID SILK
9 018588 EXTRUSION BOTTOM
10 100147 SCREW MACHINE 6-32 X 3/16 PHIL
11 018585 EXTRUSION TOP
12 017798 GUIDES PRINTED CIRCUIT
13 094360 TAPE FOAM 1/2 X 1/2
14 005090 BRACKET EXTRUSION
15 018611 ENDCAP 5”
16 101042 SCREW TS 4-40 X 1/2 SLOT FILLISTER
17 092419 FILTER DISPLAY
18 017885 PLEXIGLAS DISPLAY RIGHT
19 017892 PLEXIGLAS DISPLAY LEFT
20 017886 PLEXIGLAS LOGO
21 094017 TAPE FOAM 1/4 X 1/4
22 049731 ASSY PCB DISPLAY
23 058153 LAMP INCANDESCENT
24 005224 SUBPANEL
25 101196 SCREW TAP SEMS 6-32 X 1/4 PH PN
26 101054 SCREW TAPTITE 6-32 X 1/4 PH PN
27 005222 ZEE BRACKET RIGHT
28 005223 ZEE BRACKET LEFT
29 102003 NUT MACHINE 6-32 W/LOCK
30 320110 5 DISC CD CHANGER
31 310330 METRIC SCREWS MCD205 CHANGER
32 100300 SCREW MACH SEMS 6-32 X 1 PH PN
33 005228 BRACKET MOUNTING RIGHT
34 005229 BRACKET MOUNTING LEFT
35 049730 ASSY PCB AUDIO-POWER
36 005227 REAR PANEL
37 117755 RECEPTACLE INPUT & LINE FILTER
38 102001 NUT KEP 4-40 CADMIUM PLATE
39 102020 NUT 6-32 SELF-LOCK
40 100271 SCREW SEMS 6-32 X 1/4 PH PN
41 104005 WASHER FLAT STEEL 6 X 3/8 X .032
42 101197 SCREW HI/LO 4-24 X 3/8 PH RD BLK
43 112015 STANDOFF
44 104142 WASHER LOCK 2.5mm INT STAR ZINC
45 005226 CHASSIS
46 159334 TRANSFORMER R-CORE POWER
47 117800 MTA CONNECTOR 8 PIN .156
48 019058 SPRING
49 112083 STANDOFF 6-32 X 1.250
50 100180 SCREW 6-32 X 1/8 PH PN
51 017218 FOOT PLASTIC BLACK
52 104083 WASHER #10 PLATED
53 100159 SCREW MACH 10-32 X 3/4 PH PN BLK
54 005102 COVER TOP
55 101078 SCREW TAP 8-32 X 5/16 PH PN BLK
Part
No. Description
Ref
No.

21
REPACKING INSTRUCTION
MCD205

SERVICE MANUAL
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 040834
COMPACT DISC CHANGER