Shure SCM410E - Manual (Page 18)

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This modification is equivalent to shorting one of the channel
OVERRIDE IN to the LOGIC GROUND pin via the high density
DB-15 logic connector. With this modification, a channel is al-
ways on. Procedure:
Short jumper X1003.
SHORTING MUTE IN TO LOGIC GROUND INTERNALLY
This modification is equivalent to shorting a channel MUTE IN
to the LOGIC GROUND pin via the high density DB-15 logic
connector. With this modification, a channel is always muted. Procedure:
Short jumper X1004.
DISABLING AUTOMATIC MIXING FUNCTION BY CHANNEL
This modification removes a given channel from the IntelliMix
automatic mixing circuitry, so that a source such as music can
be played through a channel of the SCM410 without affecting
the automatic mixing of the unmodified channels.
Procedure:
1. If necessary, modify the channel input to accept line level
signals. Refer to the Inserting an Input Line Pad paragraph.
2. Modify the channel’s Override In to On. Refer to the Shorting
Override In to Logic Ground Internally paragraph.
3. Short jumper X1001 to remove the channel from the MaxBus.
4. Remove R1064 to remove the channel from the Last Mic
Lock-On Bus.
MANUAL MODE ENABLE
This modification defeats the automatic mixing functionality of
the SCM410, so that it operates as a standard 4 x 1 mixer. Procedure:
Short jumper X9001.