Need help?Do you have a question about the Motorola CM Series and is the answer not in the manual?
Overview of the Controlhead for CM140/CM340 models, detailing its components and functions.
Overview of the Controlhead for CM160/CM360 models, detailing its components and functions.
Introduction to the theory of operation chapter for controlhead circuits.
Explains the CM140/CM340 controlhead, including its components and operational theory.
Details the power supply sources and voltage distribution for the CM140/CM340 control head.
Describes the Serial Peripheral Interface (SPI) bus communication for CM140/CM340 control heads.
Explains the configuration and operation of the CM140/CM340 control head keypad keys.
Details how status LEDs and keypad backlighting are controlled and powered.
Describes signals for microphone, PTT, and SCI operation via the CM140/CM340 connector.
Explains the CM140/CM340 control head speaker and its audio signal connection.
Details electrostatic transient protection methods for sensitive components.
Explains the CM160/CM360 controlhead, including its components and operational theory.
Details the power supply sources and voltage distribution for the CM160/CM360 control head.
Describes the SPI bus communication for CM160/CM360 control heads.
Explains the configuration and operation of the CM160/CM360 control head keypad keys.
Details the LCD driver and its control via the SPI bus for CM160/CM360.
Explains how status LEDs and LCD/keypad backlighting are controlled.
Describes microphone, PTT, and SCI signals via the CM160/CM360 connector.
Explains the CM160/CM360 control head speaker and its audio signal connection.
Details electrostatic transient protection methods for sensitive components.
Comprehensive troubleshooting chart for CM140/CM340 control head issues.
Flowchart for diagnosing general control head failures in CM140/CM340 units.
Troubleshooting steps for button/tones select errors on CM140/CM340, part 1 of 2.
Troubleshooting steps for button/tones select errors on CM140/CM340, part 2 of 2.
Comprehensive troubleshooting chart for CM160/CM360 control head issues.
Flowchart for diagnosing general control head failures in CM160/CM360 units.
Troubleshooting steps for button/tones select errors on CM160/CM360, part 1 of 2.
Troubleshooting steps for button/tones select errors on CM160/CM360, part 2 of 2.
Allocates PCB layouts, schematics, and parts lists for controlhead models.
To Next Page
General