Internal Adjustments; Input Sensitivity Adjustment; Output Sensitivity Adjustment - Ecler MAC90i Manual De Instrucciones

4.10. Internal adjustments

4.10.1. Input sensitivity adjustments
The MAC90i has the possibility of internal modification of the CD and LINE channels input
sensitivity, as mentioned in section 3.2. The sensitivity adjustment is performed by changing the
position of the jumpers on the printed circuit board.
The next table shows the preset sensitivities, the alternate ones, the jumper positions and
comments about it:
Preset
CD 0 dB
LINE -10dB
ATTENTION: The modification of the input gain range must be carried out by a qualified
technician.
4.10.2. Output sensitivity adjustments
Same as with input sensitivities (CD and LINE), the output levels for OUT1 / OUT2 / XFA /
XFB are internally and independently adjustable.
CHANNEL R
OUTPUT 1
J102
-10dBV OFF
0dBV ON
+4dBV OFF
+6dBV ON
CHANNEL R
XFA
J102
-10dBV OFF
0dBV ON
+4dBV OFF
+6dBV ON
ATTENTION: The modification of the output gain must be carried out by a qualified
technician.
Alternate
-10 dB
0dB
INPUT SENSITIVITY
LINE-CD-AUX
J103 J104
-10dBV OFF OFF
0dBV ON ON
CHANNEL L CHANNEL R
OUTPUT 1 OUTPUT 2
J103 J104 J105 J106
OFF OFF OFF OFF
OFF ON OFF ON
ON OFF ON OFF
ON ON ON ON
CHANNEL L CHANNEL R
XFA XFB
J103 J105 J106 J107
OFF OFF OFF OFF
OFF ON OFF ON
ON OFF ON OFF
ON ON ON ON
Change Comment
jumper off more sensitive
jumper on less sensitive
CHANNEL L
OUTPUT 2
J107 J108 J109
OFF OFF OFF
OFF ON OFF
ON OFF ON
ON ON ON
CHANNEL L
XFB
J108 J110 J111
OFF OFF OFF
OFF ON OFF
ON OFF ON
ON ON ON
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