Shure SCM410E manual Internal Modifications, Knob Assembly and Disassembly

Page 14

INTERNAL MODIFICATIONS

Only make changes to jumpers (X) and resistors (R). The circuit board contains holes where resistors are to be added.

For Channel modifications, the first character of the reference desig- nator indicates the channel number,(i.e., R1027 refers to a Channel 1 resistor, X2001 refers to a Channel 2 jumper, etc.). Modifications affecting the Master section are preceded by a “9" (i.e., X9001).

DISASSEMBLING THE SCM410/SCM410E

To access the printed circuit board for internal modifications, proceed as follows:

1.Remove the power cord from the ac power source.

2.Remove the knobs, retainer nuts, and washers from the front panel, as shown in Figure 16

All Channel modifications in this section use Channel 1 as an example.

NOTE: Remove AC power before opening the unit.

3.Remove the four screws at each corner of the rear panel.

4.Remove the two screws at each bottom corner of the front panel.

5.Slide the back panel and printed circuit board out from the rear of the chassis.

CAUTION: When reassembling the SCM410, DO NOT OVERTIGHTEN the knob retainer nuts.Damage to the internal components will result if too much force is used.

KNOB ASSEMBLY AND DISASSEMBLY

FIGURE 16

INSERTING A 12 DB MIC PREAMPLIFIER PAD

A microphone preamplifier channel gain can be reduced by 12 dB. This may be desirable with high-output microphones.

DISABLING PHANTOM POWER BY CHANNEL

To disable phantom power for a given microphone input channel, remove the resistor specified in the following table.

Channel

Remove Resistor

1R1005

2R2005

3R3005

4R4005

INSERTING AN INPUT LINE PAD

To insert a 40 dB line pad for a given microphone input, remove the resistors specified in the following table.

Channel

Remove Resistor

1R1005, R1006

2R2005, R2006

3R3005, R3006

4R4005, R4006

Procedure:

1.Short jumper X1000.

2.Remove resistor R1006.

DISABLING THE MASTER LEVEL CONTROL

The Master gain control can be disabled to prevent tampering. Refer to the following table for gain levels and resistor values.

Master Section Gain

Resistance

 

 

-6 dB

5.1 kΩ

 

 

0

10 kΩ

 

 

6 dB

20 kΩ

 

 

Procedure:

1.Remove resistor R9203.

2.Install new resistor at jumper R9173.

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Contents Model SCM410/SCM410E User Guide Table of Contents Operating Principles FeaturesDescription Front PanelRear Panel DIP Switch FunctionsDIP Switches Rack Mounting InstallationSupplied Hardware TOP Mount TABLE-TOP MountingFixed Mounting Hanging MountLinked SCM410 and SCM810 Mixers SCM410 ConnectionsLinking Multiple Mixers Equalizer Functions Basic Mixer OperationLimiter LOW-CUT Filter Effects HIGH-FREQUENCY Shelving EffectsSpecifications A15LALogic Connector Logic Connection SpecificationsLogic Equivalent Circuit Diagram Advanced FunctionsCough Button Remote CHANNEL-ON IndicatorsSuggested Logic Applications CHAIRPERSON-CONTROLLED MutingLoudspeaker Muting Filibuster ModeInhibiting Gating for Unwanted Sounds Diode Isolation of Logic Controls Remote Volume ControlInhibit Function External Logic DevicesKnob Assembly and Disassembly Internal ModificationsLocal AUX Operation Changing the Limiter ThresholdChanging Hold Time Mute in Precedence to Override in PrecedenceChanging the OFF-ATTENUATION Level Changing Override in to Mute in Filibuster ModeManual Mode Enable Group GatingCaribbean
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SCM410E, SCM410 specifications

The Shure SCM410 and SCM410E are state-of-the-art automatic microphone mixers designed to enhance audio performance in various professional environments. Known for their reliability and advanced features, these mixers are a popular choice for broadcasters, conferencing systems, and live event productions.

One of the key features of the SCM410 is its Automatic Gain Control (AGC) system, which intelligently adjusts the gain of connected microphones based on their audio levels. This ensures that the output remains consistent, making it ideal for situations where multiple speakers might share the microphone, such as panel discussions or meetings. The SCM410E variant further enhances this functionality with extended connectivity options, catering to more complex audio setups.

Both models incorporate Shure's exclusive IntelliMix technology. IntelliMix employs sophisticated algorithms to minimize interference and eliminate feedback, which is crucial for maintaining intelligibility in crowded sound environments. The mixers automatically manage the microphone levels, activating only those that are in use while suppressing those that are not, which not only enhances audio clarity but also helps in reducing background noise.

The SCM410 features four microphone inputs, allowing operators to connect multiple microphones simultaneously. Users can easily control each input's level, with individual gain adjustments and a master output level control. Additionally, LEDs provide visual feedback on the status of each microphone, indicating when they are active or inactive. The SCM410E goes a step further, offering additional mic input options and enhanced flexibility for integration into larger systems.

Durability is a hallmark of the SCM410 and SCM410E, as they are constructed with high-quality materials, designed to withstand the rigors of professional use. The intuitive interface makes them accessible for both novice users and seasoned sound engineers.

With a phantom power switch for condenser microphones, an easy-to-read, backlit display, and robust connectivity options, the SCM410 and SCM410E are versatile tools for any audio setup. Their ability to automatically mix and control audio levels in real-time ensures that users can deliver presentations, discussions, and performances with clarity and confidence. Whether it’s in a corporate boardroom or a live concert venue, these automatic microphone mixers deliver high-quality sound tailored to the needs of modern audio applications.