McIntosh C49 Service Manual

C49
5 6
BLOCK DIAGRAM
MC
PREAMP
MC
RIAA
PREAMP
MM
RIAA
PREAMP
3
2
1
BAL 2
BAL 1
BAL
AMP
BAL
AMP
SOURCE SELECTOR
COAX
OPTICAL 2
USB
SPDIF
RECEIVER/
SOURCE
SELECTOR
USB
DECODER
DIGITAL TO ANALOG
CONVERTER
DIGITAL CONTROL
MICRO
INPUT
BUFFER
ELECTRONIC
VOLUME
CONTROL
PREAMP
OUTPUT
SELECTOR
-
+
BAL
AMP
-
+
BAL
AMP
FIXED
OUTPUTS
-
+
-
+
1
2
TONE
CONTROL
HEAD
PHONE
AMP
HEADPHONE
MICRO
CONTROLLER
INPUT
SELECTOR
VOLUME
SELECTOR
FRONT PANEL
PUSHBUTTON
VFD DISPLAY
4
3
2
1
2
1
MAIN
PASSTHRU
DATA
PORTS
POWER
CONTROL
RS232
CONTROL
MAIN
FUSE
POWER
RELAY
AC IN
50/60Hz
PHONO INPUTS
UNBALANCED
INPUTS
BALANCED
INPUTS
DIGITAL INPUTS
OPTICAL 1
3.3V
BACKUP
SUPPLY
POWER
TRANSFORMER
UNREGULAT ED
SUPPLY
UNREGULAT ED
SUPPLY
+5V
REGULAT OR
+3.3V
REGULAT OR
+5V DISPLAY
REGULAT OR
+15V
REGULAT OR
-15V
REGULAT OR
+13V
REGULAT OR
REAR
IR
PREAMP
FRONT
IR
MCT
BALANCED
RECEIVER
SAMPLE RATE
CONVERTER
PCM/DSD
SWITCHING

McIntosh C49 Specifications

General

Type	Solid State Preamplifier
Total Harmonic Distortion	0.005%
Phono Input Impedance	47k ohms
Headphone Output	Yes
S/N Ratio	100dB
Frequency Response	20Hz to 20kHz +0, -0.5dB
Digital Inputs	2 Coax, 2 Optical, 1 USB, 1 MCT
DAC Type	8-channel, 32-bit/192kHz PCM/DSD
Dimensions	17.5 inches (44.45cm) wide, 6 inches (15.24cm) tall (including feet), 18 inches (45.72cm) deep (including front panel and cables)
Inputs	2 Balanced
Outputs	2 balanced, 2 unbalanced
Signal to Noise Ratio	100dB
Gain	15dB
High Level Input Impedance	20K ohms, Balanced or Unbalanced