McIntosh C22CE User Manual

CONTENTS

Performance Specifications 3
Notes 3
Rear Panel 4
Front Panel and Trim Parts List 4
Section Locations 5-6
Block Diagram 5-6
Interconnection Diagram 6-9
Input/Output (Left and Right) 10-12

Amplifier 11-14
Control and Balance Control 14-18
Treble 19
Bass 20
Speaker Switch 21
AC Power Supply 22
DC Power Supply 23
Repacking Instructions 24

Mclntosh Laboratory, Inc. 2 Chambers Street, Binghamton, New York 13903 Printed

Performance Specifications

FREQUENCY RESPONSE

+ 0, -0.5dB from 20Hz to 20,000Hz

RATED OUTPUT

2.5V at MAIN and SWITCHED 1 and 2, and
BALANCED OUTPUTS

MAXIMUM VOLTAGE OUTPUT

More than 8V at all outputs

TOTAL HARMONIC DISTORTION

0.002% maximum IHF, 0.2% maximum from 20Hz
to 20,000Hz at rated output

SENSITIVITY

Phono: 2.2mV for 2.5V rated output, (0.45mV IHF)

High Level: 250mV for 2.5V rated output, (50mV

IHF)

SIGNAL-TO-NOISE RATIO, A-WEIGHTED

Phono: 80dB below 10mV input
High Level: 90dB below rated output

VOLTAGE GAIN

Phono To Tape: 41 dB at 1000Hz
Phono To Main: 61 dB at 1000Hz
High Level To Tape: 0dB
High Level To Main: 20dB

INPUT IMPEDANCE

Phono: 47K ohms and 65pF Capacitance
High Level: 22K ohms

TONE CONTROLS

Bass and Treble stepped, 20dB boost to 20dB cut

AC POWER OUTLETS

4 switched and 1 unswitched, Total capacity 1400

watts

POWER REQUIREMENTS

120V, 50/60Hz, 37 watts

DIMENSIONS

Front Panel: 16 inches (40.6cm) wide by 5-7/16
inches (13.8cm) high. Chassis depth behind mount­ing panel, including clearance for connectors: 14
inches (35.6cm). Knob clearance required in front of
mounting panel: 1-1/2 inches (3.8cm).

FINISH

Anodized gold and black front panel, chassis is black.

WEIGHT

16 pounds (7.3Kg) net, 25 pounds (11.4Kg) in
shipping carton

1. The four types of heavy lines on the schematics
denote the primary signal path in the following
manner:

= LEFT CHANNEL
= RIGHT CHANNEL
= LEFT BALANCED
= RIGHT BALANCED

2. Unless otherwise noted, all voltages indicated on
the schematics are measured under the following
conditions:
a. AC input at 120 volts, 50/60Hz.

b. All voltages are ±10% with respect to

ground. A high impedance (10 megohm)
voltmeter must be used.

3. Unless otherwise specified:

a. Resistor values are in ohms.
b. Capacitor values are in microfarads (uF).

4. The voltages enclosed in a box are signal voltages
that are measured with a 2.2mV, 1kHz signal

connected to both channels at the PHONO 1
INPUT JACKS.

Notes

FRONT PANEL CONTROLS are set at:
BALANCE CENTER DETENT
BASS and TREBLE CENTER DETENT
INPUT SELECTOR PHONO 1
LOUDNESS NORMAL
MODE STEREO
POWER ON
VOLUME CLOCKWISE
TAPE MONITOR 1 and 2 NORMAL
RUMBLE and HF FILTERS FLAT
SPEAKERS 1&2

5. On PC Board Drawings, Square Pad Indicates:
a. Polarized Capacitors - Positive
b. Diode - Cathode
c. Others - Pin 1

6. WARNING:
Parts marked with the symbol have critical
characteristics. Use ONLY replacement parts
recommended by the manufacturer.

3

Fig. 1 Rear view

Rear Panel

FRONT PANEL and TRIM
PARTS LIST

Symbol

016340
016334
018511
018512
018520
018521
C22-FrontPanel

090242
090243
090244

101035
104143
104144

Description

Indicator Glass

Front Panel Glass

Top Panel Extrusion

Lower Panel Extrusion
End Cap Left
End Cap Right
Front Panel Complete W/Glass
Input/Mode Knob
Balance/Volume Knob
Bass/Speaker/Treble Knob
Screw, 4-40 x 5/16 Fill Head
Felt Washer 3/4" Dia
Felt Washer 5/8" Dia

4

Section Locations

Block Diagram

INTERCONNECTION
PARTS LIST

Symbol Part Description

CAPACITORS

C1.C2 061276 DISC CAP, .0047uF,

JACKS

J2,J3

117563

J4,J5 117437 XLR Connector, Male

LIGHTING DEVICES

DS1.DS2 058138 Lamp Fuse Style
DS3.DS4 058137 Lamp Disc Indicator

SWITCHES

S1-S6 148068 Slide Switch (SPDT)

TRANSFORMERS

T1 159248 Power Transformer

400VAC

Phone Jack

5

6