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 |
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1 | R1005, R1006 |
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2 | R2005, R2006 |
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3 | R3005, R3006 |
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4 | R4005, R4006 |
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 |
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|
5.1 kΩ | |
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0 | 10 kΩ |
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6 dB | 20 kΩ |
Procedure:
1.Remove resistor R9203.
2.Install new resistor at jumper R9173.
CHANGING THE LIMITER THRESHOLD
To change the limiter threshold from the preset value of +16 dBu, modify the circuitry according to the following table.
CHANGE LIMITER THRESHOLD
Limiter Threshold | Limiter | X9003 | R9149 | R9142 |
(dBu) | DIP switch |
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0 | On | ±± | Remove | 20k |
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+4 | On | Short | ±± | ±± |
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+8 | Off | Short | ±± | ±± |
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+12 | On | ±± | Remove | 110k |
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+16 | Οn | ±± | ±± | ±± |
(default) |
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+20 | On | ±± | Remove | 300k |
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+24 | On | ±± | Remove | 400k |
CHANGING HOLD TIME
To change the hold time from the preset value of 0.4 seconds, modify the circuitry according to the following table.
CHANGE HOLD TIME
Hold Time | X9000 | R9073 | R9079 |
(seconds) |
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0.3 | ±± | ±± | 2M |
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0.4 (default) | ±± | ±± | ±± |
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1.0 | Short | ±± | ±± |
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1.5 | Short | 470k | ±± |
LOCAL AUX OPERATION
This modification removes the auxilliary audio from the SCM410 outputs. Auxilliary audio originates from the aux in- puts of the Shure SCM810, SCM800, and AMS8100 mixers when linked to the SCM410.
Procedure:
Remove resistor R9187.
MUTE IN PRECEDENCE TO OVERRIDE IN PRECEDENCE
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