Pearl CO-04 Compressor

 Schematic is avaiable HERE.

Pearl FG-01 Flanger

 Schematic is avaiable HERE.

Pearl CH-02 Chorus

 Schematic is avaiable HERE.

Pearl PE-10 Parametric EQ

 Schematic is avaiable HERE.

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Pearl DS-06 Distortion

Two layouts, one stock with a rotary switch and another layout by request which has a dual gang pot in place of the switch and the fixed resistors.

Stock layout

 Layout with variable Spectrum Control

L

Pearl OD-05 Overdrive

Vorg F-502 Warp Sound

This is a buffered effect, input and output connections is connected to input and output jacks 

respectively.