INTERNAL MODIFICATIONS

WARNING: All modifications must be performed by qualified service tech- nicians.

This section describes SCM810 modifications that can be made using sol- der “jumpers” on the printed circuit board; the pads where jumpers may be used are placed close together so that a single solder drop functions as a jumper. Note too that:

1.he only printed circuit board legends used for these modifications are jumpers (X's) and resistors (R's).

2.Where resistors are to be added, through-holes are present on the board.

3.For individual channel modifications, the first number of the reference designation refers to its channel number, i.e., R1027 refers to a Chan- nel 1 resistor, X7216 refers to a Channel 7 jumper, etc. All references to Channels 1 through 8 in the following paragraphs use Channel 1 jumpers and resistors as reference. Modifications affecting the Master section are preceded by the number “9" (X901, etc.).

To gain access to the main printed circuit board, remove the 8 Phillips head screws securing the top cover, and remove the top cover. Most modifica- tions can be made from the top of the main board.

Line-Level Output to Mic-Level Output

Procedure: Short jumper X901. Remove resistors R900 and R909.

Disable Master Level Control

The Master gain control can be disabled so it cannot be tampered with. The table indicates the resistor value to be used for the desired gain.

Procedure: Remove resistor R9230. Install new resistor at jumper X914.

Master Section Gain

Resistance

 

 

-6 dB

5.1 kΩ

 

 

0

10 kΩ

 

 

6 dB

20 kΩ

 

 

Change Limiter Threshold

All three threshold settings (+16, +8 and +4 dBm) can be changed. To shift the threshold down by 6 dB, resistor R will be 82 kΩ. To shift the limiter thresholds up by 6 dB, R will be 330 kΩ.

Procedure: Remove resistors R9177 and R9180. Install new resistor R at jumper X907.

Local Aux Operation

With linked mixers, the Aux input from a modified mixer does not link. Procedure: Remove resistor R9024.

Direct Out to Post-Fader

A channel's Direct Out phone jacks can be changed from pre- to post-fader.

Procedure: Short jumper X106. Remove resistor R1011.

Direct Out to Post-Fader Send/Return (Insert)

Changes a channel's 1/4-inch Direct Out jack to a post-fader insert point. Send is tip of phone jack; return is ring. Insert jacks are useful for inserting line-level signal processors into a channel. For instance, a parametric EQ or compressor/limiter can be inserted into a channel for additional process- ing.

Procedure: Short jumpers X101, X102, X105 and X106. Remove resistors R1011 and R1020.

Direct Out to Gated Direct Out

This post-fader, post-EQ channel output is gated, but without NOMA. In this mode, if the Local/Global switch is in “Local”, a manual mix of channel in- puts is present at the Line output. The Off-Attenuation level of the Gated Direct Out signal is infinite.

Procedure: Short jumpers X104 and X906 (in Master section). Remove re- sistor R1011.

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Shure SCM810AZ manual Internal Modifications, Disable Master Level Control

SCM810AZ specifications

The Shure SCM810AZ is a highly regarded automatic mixer designed specifically for professional audio applications. It is an essential tool for sound reinforcement in situations where multiple audio sources need to be managed efficiently, such as in conference rooms, broadcast environments, and live events.

One of the standout features of the SCM810AZ is its advanced Automatic Mixing technology. This allows the unit to intelligently mix multiple microphones by reducing comb filtering and minimizing background noise. It utilizes an algorithm that automatically detects the level of each input and gradually adjusts its gain to create a balanced output. This results in a cleaner and more intelligible audio feed, ideal for environments with dynamic speaker presence.

The SCM810AZ is equipped with eight input channels, each with individual gain adjustments and the capability to accommodate various types of microphones, from handheld to lavalier. Each channel is designed with a low-cut filter to eliminate unwanted low-frequency noise, improving overall clarity. Additionally, the mixer includes a mic preamp with high headroom, ensuring that even the loudest sources can be captured without distortion.

Another significant characteristic of the SCM810AZ is its intuitive control interface. The front panel features legible LED indicators that provide real-time feedback on levels and activity, allowing users to quickly identify which channels are active. The mixer also includes a comprehensive monitoring section, allowing operators to listen to both individual channels and the overall mix.

In terms of connectivity, the SCM810AZ provides multiple output formats, including balanced XLR and unbalanced 1/4" outputs. This versatility makes it compatible with a variety of audio equipment, ensuring seamless integration into existing setups.

Durability is key in professional audio; thus, the SCM810AZ features a rugged design suitable for both permanent installations and portable use. Its compact form factor allows for easy rack mounting, saving valuable space in equipment setups.

In summary, the Shure SCM810AZ stands out as a professional-grade automatic mixer. With its intelligent automatic mixing technology, robust input options, intuitive interface, and versatile connectivity, the SCM810AZ is an indispensable tool for achieving high-quality audio in any multi-mic environment. Whether used for conferences, broadcasts, or live performances, it delivers consistent and reliable audio performance, meeting the demands of professional sound applications.