McIntosh MS300 User manual

SERVICE MANUAL
Performance Specifications ........................................ 2
Notes ......................................................................... 2
Safety Information ..................................................... 2
Rear Panel .................................................................. 3
Section Location ........................................................ 3
BlockDiagram ........................................................... 4
Interconnection Diagram ........................................... 5
Front Panel Schematic and PCB ......................... 7 - 10
ExplodedView and Parts List ............................ 11 - 12
Parts List ................................................................... 15
Repacking List .......................................................... 17
CONTENTS
MUSIC SERVER

2
Specifications are subject to change without notice.
Please check the McIntosh web site for any changes to
the specifications.
AudioSpecifications
Frequency Response: 2–20,000Hz,+/-1dB
Signal to Noise Ratio: 102dB (IHFA-Weighted)
DynamicRange: 96dB
HarmonicDistortion: 0.01%
Channel Separation: 95dB(1,000Hz)
Output Level: 2.0Vrms
Output Impedance: 200ohms
VideoSpecifications
SignalSystem: NTSC,PAL(Factory Option)
Output Impedance: 75ohm
GeneralSpecifications
DigitalOutputOptical: -15dbmto -21dbm
DigitalOutputCoaxial: 0.4Vpp to0.6Vpp/75ohm
DigitalSignalFormat: 44.1kHz SamplingFrequency
PowerRequirements: 100-240Volts,50-60Hz at60watts
OverallDimensions: Width is17-1/2inches(44.45cm)
Heightis5-3/8 inches (13.69cm)
Depthis15inches (38.1cm)
Note: When the disc tray is Opened, the
panel clearance required in front of
mounting panel is 5-1/4 inches (13.3cm)
Weight: 20.7pounds(9.4Kg)net, 37.2 pounds
(16.9Kg) in shipping carton
1. Unless otherwise noted, all voltages indicated on the
schematics are measured under the following conditions:
a. ACinputat120volts,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. Capacitorvaluesaremicrofarads(uF).
c. Inductor values are in microhenries (uH)
.
4. On PC board drawings, Square pad indicates:
a. PolarizedCapacitors-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.
6. Use McIntosh Remote Control Model HR053 with the
MS300.
7. SeeAdvancedUsersGuidefor Keyboard(050202)
operation.
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 specified in the Owners
Manual may result in Hazardous
RadiationExposure.
ThisproductincorporatesanembeddedCLASS3BLaser(IEC60825-1).

REAR PANEL
SECTION LOCATIONS
TOPVIEW WITH COVER REMOVED
MS300
3

NOTES
4

INTERCONNECT
1
Part #320192
Part #320200
5

NOTES
6

7
MS300
FRONT PANEL 050177
11
8

MS300
FRONT PANEL 050177
11
910

EXPLODEDVIEW AND PARTS LIST
MS300
11 12

NOTES
13 14

320187MAINPCB
320189CHASSIS/POWERSUPPLYPCB
SeeNote
320191DISPLAYPCB
SeeNote
320202SERIALRS232PCB
SeeNote
320204AUDIOEXPANSIONPCB
SeeNote
320203SPDIFPCB
SeeNote
320208IRDATAPCB
SeeNote
320190CDROMPCB
SeeNote
320186HARDDRIVE
SeeNote
050177FRONTPANELPCB
D1 DIODE SILICON 070047
D2 DIODE SILICON 070047
D3 DIODE SILICON 070047
DS1 LED SQUARE RED 058109
DS2 LED SQUARE RED 058109
DS3 LED SQUARE RED 058109
DS4 LED SQUARE RED 058109
DS5 LED GREEN 5MM HI-INT 058165
DS6 LED GREEN 5MM HI-INT 058165
DS7 LED GREEN 5MM HI-INT 058165
DS8 LED GREEN 5MM HI-INT 058165
J1 CONNHEADERSHROUDED1X14 117875
J2 CONNHEADERSHROUDED1X14 117875
J3 CONN HEADER 1X5 STRAIGHT 117874
J4 CONN HEADER 1X5 STRAIGHT 117874
Q1 TRANSISTOR PNP SILICON 132172
Q2 TRANSISTOR PNP 132224
Q3 TRANSISTOR PNP 132224
Q4 TRANSISTOR PNP 132224
Q7 TRANSISTOR PNP 132224
Q8 TRANSISTOR NPN 132223
R1 RES MF 2.21K 1% 1/4W 144298
R2 RES MF 221 OHM 1% 1/4W 144172
R3 RES MF 221 OHM 1% 1/4W 144172
R4 RES MF 221 OHM 1% 1/4W 144172
R5 RES MF 324 OHM 1% 1/4W 144338
R6 RES MF 10K 1% 1/4W 144053
R7 RES MF 100 OHM 1% 1/4W 144196
R8 RES MF 100 OHM 1% 1/4W 144196
R9 RES MF 100 OHM 1% 1/4W 144196
R10 RES MF 100 OHM 1% 1/4W 144196
R11 RES MF 1K 1% 1/4W 144090
R12 RES MF 1K 1% 1/4W 144090
S1 SWITCH PB TACT 150058
S2 SWITCH PB TACT 150059
S3 SWITCH PB TACT 150059
S4 SWITCH PB TACT 150059
S5 SWITCH PB TACT 150058
S6 SWITCH PB TACT 150058
S7 SWITCH PB TACT 150058
S8 SWITCH PB TACT 150058
S9 SWITCH PB TACT 150059
S10 SWITCH PB TACT 150058
S11 SWITCH PB TACT 150058
S12 SWITCH PB TACT 150059
S13 SWITCH PB TACT 150058
S14 SWITCH PB TACT 150058
S15 SWITCH PB TACT 150059
S16 SWITCH PB TACT 150058
S17 SWITCH PB TACT 150059
NOTE:
Modules not available as replacement parts. If defect is
suspected in these modules, contact factory for service
options.
PARTS LIST
2
3
4
5
6
7
8
9
10
11
MS300
15

NOTES
16

REPACKING INSTRUCTIONS
17
MS300

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 040XXX
MUSIC SERVER