McIntosh C42 Service Manual

PE RF
O
RMAN
CE S
PEC
I F I
CAT
IONS
FREQUENCY
RESPONSE
.
+0,
-0.5d8
Írom 2OHz
to 20,000H2
TOTAT HARMONIC
DISTORTION
O.OO2% maximum
Írom 2OHz
to 20,000H2
SICNAT
TO
NOISE RATIO
Phono:
S6dB
(A
Weighted)
High Level:
97dB
(Aweighted)
RATED
OUTPUT VOTTAGE
Main
and Outputs
1 and 2:2.5Vrms
MAXIMUM VOTTAGE
OUTPUT
Main and
Outputs 1
and 2:1OVrms
OUTPUT IMPEDANCE
240 ohms
INPUT
IMPEDANCE
Phono:47k
ohms, 65pf
High
Level:
22k ohms
SENS¡TIVITY
Phono:4.5mV
for rated
output
High Level:
450mV for
rated
output
MAXIMUM
INPUT
S¡CNAI
Phono:5OmV
High Level:5V
VOTTAGE
GAIN
Phono
to Tape
Out:40d8
High Level
to Tape
Out:OdB
High Level
to Main
Out: 15dB
POWER
REQUTREMENTS
1
O0Volts, 5O/60H2,
30 Watrs
1 1
OVolts, 5Ol6OHz,
30 Watrs
1 20Volts,
5Ol6OHz,
30 Watts
22oVolts,
5O/6OHz, 30 Watts
230Volts,
5O/6OHz,
30 Watts
240Volts,
5Ol6OHz,
30 Watrs
Note:
Refer
to the rear panel
of the
C42 for
the correct voltage
DIMENSIONS
Width: 17-1/2
inches
(44.5cm)
Height:
5-3lB inches
(13.7cm)
Depth:
1B-1/2
inches
(44.5cm)
,including
clearance for
connectors
NOTES
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
af
"l2O
volts,
50/60H2.
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.
lnductor
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. WARNINC:
^
Parts marked
with
the symbol
,/
!
\
have
critical characteristics.
Use only replacement
parts
recommended
by the manufacturer.
2

McIntosh C42 Specifications

General

Brand	McIntosh
Model	C42
Category	Amplifier
Language	English