Pulse Width Mod Install - Roland KIWI-3P Manual

Pulse Width Mod Install

The Kiwi Pulse board adds the ability to mix the three wave
types (Saw, Pulse and Square) and allows Pulse
Width control on the Pulse waveform.
Mixing waves or Pulse Width control was not possible in the
original JX-3P .
Step 1) Fitting the Kiwi-PW board requires 24 resistors to be
removed from the main board and 28 wires to be
soldered from the Kiwi-Pulse board. All these wires
have been prefitted on the Kiwi-Pulse board.
The following resistors need to be removed from the
Voices area of the JX-3P main board. The photo shows
the locations and the resistor numbers are
R135, R140, R150, R151
R235, R240, R250, R251
R335, R340, R350, R351
R435, R440, R450, R451
R535, R540, R550, R551
R635, R640, R650, R651
These resistors are bent on the solder side before they are soldered making removal more difficult. It is easier to cut them off from the top side and then remove the
remainder of the leads from the underside with a desoldering tool. R135 & R140 (R235,R240 etc) have wires soldered into the holes from the Kiwi-Pulse board so it is
best to remove the remainder of the leads in each voice for these resistors to clear the holes. The legs of R150, R151 ,R250 etc can be left in the holes to save work.
Step 2) Fitting the board is done by cleaning the area on the top side of the JX-3P main board where the Kiwi-Pulse board is going to be placed (see photo) and then
removing the backing paper from the Kiwi-Pulse board and fixing it to the JX-3P main board in the position in the photo.
www.kiwitechnics.com 3P Matrix Upgrade User Manual v1.2
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