McIntosh MA6300 Manuel utilisateur

SERVICE MANUAL

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

Notes ......................................................................... 3

Rear Panel .................................................................. 4

Section Location ........................................................ 4

Block Diagram ...................................................... 5 - 6

Interconnection Diagram ...................................... 7 - 8

Main Schematic and PCB ..................................... 9 - 16

Preamp Schematic and PCB ............................... 17 - 20

Heatsink Schematic and PCB ............................ 21 - 28

Display Schematic and PCB .............................. 29 - 32

Push Button Schematic and PCB ....................... 33 - 34

Meter Schematic and PCB ................................. 35 - 36

Parts List ............................................................ 37 - 42

Repacking Instruction .............................................. 43

CONTENTS

INTEGRATED AMPLIFIER

SERIAL NO. WR1001 And Above

PERFORMANCE SPECIFICATIONS

PowerOutput

100 watts into an 8 ohm load is the minimum sine wave

continuous average power output. The output RMS

voltage is 28.3V across 8 ohms

160 watts into a 4 ohm load is the minimum sine wave

continuo us average power output. The output RMS

voltage is 25.3V across 4 ohms

OutputLoadImpedance

8 and 4 ohms

RatedPowerBand

20Hzto20,000Hz

Total HarmonicDistortion

0.005%maximumharmonicdistortionatanypowerlevel

from250milliwattstorated power,20Hz to 20,000Hz

DynamicHeadroom

1.4dB

Frequency Response

+0,-0.5dBfrom20Hzto20,000Hz

+0,-3dBfrom10Hzto 100,000Hz

PreamplifierMainOutput

1Vforratedinput(8VMaximun)

Sensitivity(for rated output)

HighLevel,250mVunbalanced,500mVbalanced

Phono,2.5mV

PowerAmpIn,1V

Signal To Noise Ratio(A-Weighted)

High Level, 97dB below rated output

Phono,90dBbelow10mVinput

PowerAmplifier, 110 below rated output

IntermodulationDistortion

0.005%maximum, if the instantaneous peak power

output is rated power or less per channel with both

channels operating for any combination of frequencies

from20Hzto20,000Hz.

WideBandDampingFactor

200 at 8 ohms

100 at 4 ohms

InputImpedance

HighLevel,20Kohms

Phono, 47K ohms; 65pF

PowerAmp In, 10K ohms

MaximumInputSignal

HighLevel,8V

Phono,90mV

PowerAmplifierIn, 8V

MainOutputImpedance

50ohms

PowerGuard

Less than 2% THD with up to 16dB overdrive at 1,000Hz

VoltageGain

High Level to Tape Output: 0dB

High Level to Main Output: 12dB

Phono to Main Output: 52dB

PowerRequirements

100Volts,50/60Hzat3.6amps

110Volts,50/60Hzat3.6 amps

120Volts,50/60Hzat3.2amps

220Volts,50/60Hzat1.8amps

230Volts,50/60Hzat1.8amps

240Volts,50/60Hzat1.8amps

Note: Refer to the rear panel of the MA6300 for the

correct voltage.

OverallDimensions

Widthis17-1/2inches(44.45cm)

Heightis 7-5/8 inches (19.37cm) including feet

Depth is 22 inches (55.88cm) including the Front Panel,

Knobs and Cables

Weight

37 pounds (16.8 kg) net, 55 pounds (24.9 kg) in shipping

carton

ShippingCartonDimensions

Widthis25inches(63.5cm)

Depthis 27 inches (68.6cm)

Heightis12inches(30.5cm)

MA6300

NOTES

MA6300

REAR PANEL

SECTION LOCATIONS

TOP VIEW WITH COVER REMOVED

INTEGRATEDAMPLIFIER

MA6300

BLOCK DIAGRAM

7 8

INTERCONNECT

INTEGRATEDAMPLIFIER

MA6300

910

MAIN 050276 SCH 1 OF 3

11 12

MAIN 050276 SCH 2 OF 3

INTEGRATEDAMPLIFIER

MA6300

13 14

MAIN 050276 SCH 3 OF 3

15 16

MAIN 050276 PCB

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