Inter-m CM-20.5 - User Manual

www.inter-m.com
MADE IN KOREA
NO: 9017030100
SERVICE
MANUAL
P O W E R
AMPLIFIER
CM-5.5/7.5/10.5/15.5/20.5

Inter-m CM-20.5 Specifications

General

Type	Power Amplifier
Channels	2
Power Output (per channel)	20W
Frequency Response	20Hz - 20kHz
Input Impedance	10kΩ
Power Source	AC 50/60Hz

Summary

Electrical Adjustment Procedure

CM-7.5;10.5;15.5;20.5 Idle Current Adjustment

Adjust VR101 for 10, 35, 45mA bias current based on measured voltage.

CM-5.5 Idle Current Adjustment

Adjust VR101/VR201 for 10mA idle current per channel.

Specifications

Performance Specifications

Covers power output, frequency response, THD+N, and noise metrics.

Operational Parameters

Details sensitivity, gain, impedance, indicators, controls, and power specs.

Physical Characteristics

Lists weight and dimensions of the amplifier models.

Electrical Parts List - CM5.5 Models

CM5.5 Amplifier;Power Board Components

Lists components for CM5.5 amplifier and power boards.

Electrical Parts List - CM7.5;10.5 Models

Input & Switch Board Components

Lists components for CM7.5/10.5 input and switch boards.

Amplifier & Output Board Components

Lists components for CM7.5/10.5 amplifier and output boards.

Electrical Parts List - CM15.5;20.5 & CM7.5;10.5

CM7.5;10.5 Bracket;LED Board Components

Lists components for CM7.5/10.5 bracket and LED boards.

CM15.5;20.5 Input;Power Board Components

Lists components for CM15.5/20.5 input and power boards.

Electrical Parts List - Other Boards

CM15.5;20.5 Switch Board Components

List of components for CM15.5/20.5 switch board.

CM7.5;10.5 Bracket Board Components (4005183610)

List of components for CM7.5/10.5 bracket board.

Top and Bottom View of PC Boards - CM5.5

CM5.5 Amplifier Board Layout

Visual layout of the CM5.5 amplifier board.

CM5.5 Power Board Layout

Visual layout of the CM5.5 power board.

Top and Bottom View of PC Boards - Other Models

M-700;1000 Amplifier Board Layout

Visual layout for M-700/1000 amplifier board.

CM15.5;20.5 Amplifier Board Layout

Visual layout for CM15.5/20.5 amplifier board.

Top and Bottom View of PC Boards - Other Models

M500 Amplifier Board Layout

Visual layout for M500 amplifier board.

M-700;1000 Power Board Layout

Visual layout for M-700/1000 power board.

Top and Bottom View of PC Boards - Other Models

M-1500;2000 Power Board Layout

Visual layout for M-1500/2000 power board.

CM5.5 Switch Board Layout

Visual layout for CM5.5 switch board.

Top and Bottom View of PC Boards - Other Models

CM7.5;10.5 Bracket;Switch Board Layouts

Visual layouts for CM7.5/10.5 bracket and switch boards.

CM15.5;20.5 Switch;Bracket Board Layouts

Visual layouts for CM15.5/20.5 switch and bracket boards.

Wiring Diagrams

CM5.5 Wiring Diagram

Wiring diagram for the CM5.5 amplifier model.

CM7.5;10.5 Wiring Diagram

Wiring diagram for the CM7.5/10.5 amplifier models.

Block Diagram

System Block Diagram

Overall functional block diagram of the amplifier system.

Wiring Diagrams (Continued)

CM15.5;20.5 Wiring Diagram

Wiring diagram for the CM15.5/20.5 amplifier models.

Schematic Diagrams

CM 5.5 Schematic Diagram

Detailed schematic diagram for the CM 5.5 amplifier.

Schematic Diagrams (Continued)

CM7.5;10.5 Schematic Diagram

Detailed schematic diagram for CM7.5/10.5 models.

Schematic Diagrams (Continued)

CM15.5;20.5 Schematic Diagram

Detailed schematic diagram for CM15.5/20.5 models.

Exploded View and Mechanical Parts List

Mechanical Parts - CM-5.5

Mechanical components for CM-5.5 model.

Mechanical Parts - CM-7.5;10.5

Mechanical components for CM-7.5/10.5 models.

Mechanical Parts - CM-10.5 (DOM)

Mechanical components for CM-10.5 (DOM).

Mechanical Parts - CM-5.5;7.5 (DOM)

Mechanical components for CM-5.5/7.5 (DOM).

Exploded View and Mechanical Parts List (Continued)

Mechanical Parts - CM-15.5

Mechanical components for CM-15.5 model.

Mechanical Parts - CM-20.5

Mechanical components for CM-20.5 model.

Assembly Drawings - Front and Top

Front Panel Assembly - CM-5.5;7.5;10.5

Assembly drawing of the front panel for CM-5.5/7.5/10.5.

Top Cover Assembly

Assembly drawing of the top cover and related parts.

Connectors Assembly

Assembly details of various input/output connectors.

AC Cord & Circuit Breaker Assembly

Assembly details for AC cord and circuit breaker.

Assembly Drawings - Front and Back

Front Panel Assembly - CM-15.5;20.5

Assembly drawing of the front panel for CM-15.5/20.5.

Back Chassis Assembly

Assembly drawing of the back chassis and related parts.