Text preview for : PRX Series Input Board Schematics.pdf part of JBL PRX Series Input Board Schematics JBL Audio PRX-535 PRX Series Input Board Schematics.pdf
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4
+
3
1
-
2 8
4
+
3
2 8 1
- -
1 2 8
3
+ 6
4 -
7 +
5
5 7
+
-
6
4
6 + +
- 3 5
7 1 7
5 - -
+ 2 8 6
Thru Outputs
Configuration Amplifier DSP Channels DSP Channels to J10 Pins
FR1 LF, HF 1, 2 Ch1 to 2&3, Ch2 to 8&9, Ch3 to 5&6
FR2 LF, MF, HF 3, 2, 1 Ch3 to 2&3, Ch2 to 5&6, Ch1 to 8&9
SW1 LF 1 Ch1 to 2&3, Ch2 to 8&9, Ch3 to 5&6
----------------------------------------------------------------------------------------------------------------
Amplifier to J10 Pins LF to 2&3, MF to 5&6, HF to 8&9
1
J10 2
AMP CON 3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
2 8
-
1
3
+
4
High gain (244), BW=1Khz with output offset approx +1V
Signal present LED (Green)
6
-
7 6
-
5 7
+
5
+ D2
2 8
-
1
3
+
4
This is a comparator configuration. Monitors the ADC input (CLPADC)
and when near saturation (+/- 1.20V pk) outputs a square wave
The threshold is set by the resistor network at the (+) input
From DSP
To Connector
D1
6
-
7 4
+
5 3
+
1
-
2 8
Clip LED (Yellow)
2 8
-
1
3
+
4
6
-
7
5
+
Short Pins 1&2 , 3&4
To DSP
From Audio Input
From CPU
To DSP
To Relays
To ADC
To AMPLIFIER
To Analog Outputs
From CPU
From ADC