McIntosh C50 Service Manual

2
1. Unless otherwise noted, all voltages indicated on the
schematics are measured under the following conditions:
a. AC input at rated voltage marked on rear panel.
b. All voltages are +/-10% with respect to ground. A
high impedance (10 megaohm) voltmeter must be used.
2. Unlessotherwisespecied:
a. Resistor values are in ohms.
b. Capacitor values are microfarads (uF).
c. Inductor values are in microhenries (uH)
3. On PC board drawings, Square pad indicates:
a. Polarized Capacitors - Positive
b. Diodes - Cathode
c. Others - Pin 1
4. WARNING
Parts marked with the symbol have critical
characteristics. Use only replacement parts recom-
mended by the manufacturer.
5. Use McIntosh Remote Control Model HR063.
NOTES
PERFORMANCE SPECIFICATIONS
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 15Hz to 100,000Hz
Total Harmonic Distortion
0.002% from 20Hz to 20,000Hz
Rated Output (Main)
2.5V Unbalanced, 5V Balanced
Maximum Voltage Output
8V RMS Unbalanced, 16V RMS Balanced
Sensitivity (for rated output)
High Level, 450mV unbalanced, 900mV balanced
Phono MM, 4.5mV
Phono MC, 0.45mV
Signal To Noise Ratio (A-Weighted)
High Level, 100dB
Phono, 88dB
Equalizer Controls
Input Impedance
High Level, 22K ohms unbalanced, 44k ohms balanced
Phono MM, 47K ohms; 50 to 750pF, in 50pF steps
Phono MC, 25, 50, 100, 200, 500 or 1,000 ohms; 100pF
Maximum Input Signal
High Level, 5V Unbalanced, 10V Balanced
Phono MM, 50mV
Phono MC, 5mV
20 50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY IN HERTZ
0
- 5
A
M
P
L
I
T
U
D
E
I
N
D
E
C
I
B
E
L
S
-10
-15
+ 5
+10
+15
Voltage Gain
High Level to Record Output: 0dB
High Level to Main Output: 15dB
Phono MM to Record Output: 40dB
Phono MC to Record Output: 60dB
Output Impedance
220 ohms
Headphone Load Impedance
100 ohms to 600 ohms
Digital Input Sample Rates
Optical: 16Bit, 24Bit - 32kHz to 96kHz
Coaxial: 16Bit, 24Bit - 32kHz to 96kHz
USB: 16Bit, 24Bit, 32Bit - 32kHz to 192kHz
Power Control and Trigger Output
12VDC, 25mA
Power Requirements
Field AC Voltage conversion of the C50 is not pos-
sible. The C50 is factory congured for one of the
following AC Voltages:
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
Standby Power, less than 0.5 watts
Note: Refer to the rear panel of the C50 for the correct
voltage.
Overall Dimensions
Width is 17-1/2 inches (44.45cm)
Height is 7-5/8 inches (19.37cm) including feet
Depth is 18 inches (45.72cm) including the Front Panel,
Knobs and Cables
Weight
28.5 pounds (12.9 kg) net, 44 pounds (20.0 kg) in ship-
ping carton
Shipping Carton Dimensions
Width is 27 inches (68.6cm)
Height is 14 inches (35.6cm)
Depth is 25 inches (63.5cm)

McIntosh C50 Specifications

General

Signal to Noise Ratio	100dB
Output Impedance	200 ohms
Power Consumption	50 Watts
Frequency Response	20Hz to 20, 000Hz +0, -0.5dB
Total Harmonic Distortion	0.002%
Dimensions	17.5" (44.45cm) x 6" (15.24cm) x 18" (45.72cm)
Maximum Output Voltage	16V RMS (Balanced), 8V RMS (Unbalanced)
Gain	15dB
Phono Input Impedance	47K Ohms
Inputs	6 (including phono)
Outputs	3 unbalanced, 2 balanced