Troubleshooting Guide

MCP35A Troubleshooting Procedure

If a problem exists on the MCP35A, certain steps should be taken to find the problem. This test relates to the Program Amplifier (All-Call or Emergency). The first indication of a problem will appear on the three level indi- cators at the front of the unit. They are green, yellow, and red.

If there is no problem, the green, yellow and/or the red LED should flicker whenever audio is present, depending on the signal strength. A problem is indicated when the red LED does not flicker no matter what level the pro- gram control is set to.

To find the problem, follow this simple procedure:

1.Disconnect the switchbank(s), SBA225, from the MCP35A and depress the emergency button. While speak- ing into the built-in microphone, adjust the Program Level Control and check the level indicators as described above. If all three indicators can be made to light depending on the output level control setting, then the MCP35A is okay.

2.Connect only the first switchbank (if more than one is being used). With the speaker load still connected, check the level indicators again.

3.If the MCP35A LED’s still indicate a problem when connected to the switchbank, each speaker location on that switchbank being tested should be removed one at a time, until the level indicators show a normal out- put. The speaker and cable associated with that location should then be checked.

4.Follow the same procedure, connecting each successive switchbank until the troublesome SBA225 panel or speaker load is found.

5.If the MCP35A is tested without the switchbank, and the three LED’s do not ‘light’ indicating full output, then the 35-watt program amplifier of the MCP35A may be defective. Contact the Bogen Applications Engineering Department for assistance.

If it appears that there is no intercom communication between the unit and a speaker station, the 20-watt intercom amplifier inside the MCP35A may be defective. Contact the Bogen Applications Engineering Department for assistance.

Caution

Do not attempt to connect a 25V speaker directly to the MCP35A using GND as one of the connecting points. This could seriously damage the MCP35A because the unit uses a balanced output when con- nected to the speaker lines.

PI35A, SI35A specifications

The Bogen PI35A is a versatile and high-performance amplifier that is designed for commercial sound reinforcement applications. With its robust construction and advanced features, the PI35A is perfect for schools, conference rooms, and various public address environments.

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In conclusion, the Bogen PI35A is a reliable and feature-rich amplifier that offers flexibility and excellent sound quality for various applications. Its combination of powerful output, multiple input options, advanced protection circuitry, and compact design makes it a solid choice for users seeking a high-performance sound reinforcement solution. Whether used for educational purposes, corporate events, or public announcements, the PI35A delivers a professional audio experience tailored to meet diverse needs.