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On the JX-3P front panel there are 12 buttons on the top row. These are in the same order as the voices
being trimmed and are from right to left Voice 1 DCO 1, Voice 1 DCO 2, Voice 2 DCO 1, Voice 2 DCO 2 and
so on. The current voice being trimmed will flash on the top row. Trimming is done using TONE buttons 6,
7 and 8 (Original JX-3P buttons 14, 15 & 16) which will flash on the bottom row.
The voice outputs are IC104-604 with Voice 1 DCO1 output on pin1 of IC104, voice 1 DCO 2 output is on
pin7 of IC104 and so on through to Voice 6 DCO2 output which is on pin7 of IC604.
The process is, select the voice to trim using the top row of buttons (it will flash), connect the oscilloscope
to the DCO output being trimmed (pin 1 or 7) and trim the SAW level using the Tone 7 (down) and Tone 8
(up) buttons to adjust the level until it is just below the clip point. If you get lost Tone 6 will reset the
adjustment to zero so you can try again.
These setting are saved to permanent memory and shouldn't need to be changed again.
5) Test #4 – Set VCF Tune. This is selected by pressing BANK 4. Bank 4 will flash.
This test is used to set VCF Tune. Press C4 and tune VR102-VR602 for output at 1kHz. Do this for each
voice. Use the front panel lights as a guide to which voice is sounding.
6) Test #5 – Set VCF Resonance. This is selected by pressing BANK 5. Bank 5 will flash.
This test is used to set the VCF Resonance level. Connect an oscilloscope between TP-7 (POLY OUT) &
GND. Cycle through all 6 voices setting VR103-VR603 so that the output is 600mV peak to peak. Use the
front panel lights as a guide to which voice is sounding.
7) Test #6 – Set VCA Balance. This is selected by pressing BANK 6. Bank 6 will flash.
This test is used to set the VCA Offset. Connect an oscilloscope between TP-7 (POLY OUT) & GND.
There are special notes to use for this test. The lowest 6 white notes are used to trigger the 6 voices. These
are in the order C = Voice6, D=Voice5, E=Voice4, F=Voice3, G=Voice2 and A=Voice1.
While repeatedly pressing the note related to the voice being trimmed adjust VR102(Voice1)-VR602(voice6)
for a minimum change in the output as the note is pressed.
Bend Lever Adjustment
With the bend switch set to Wide Range check the the bend range is one octave up and down. The maximum and
minimum settings can be adjusted using VR6 (-) and VR7 (+).
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3P Matrix Upgrade User Manual v1.2
Summary of Contents for KIWI-3P
Page 5: ...5 Front Panel Description www kiwitechnics com 3P Matrix Upgrade User Manual v1 2 ...
Page 6: ...6 Basic Connections www kiwitechnics com 3P Matrix Upgrade User Manual v1 2 ...
Page 7: ...Menu Flow Chart ...
Page 8: ...8 Edit Map www kiwitechnics com 3P Matrix Upgrade User Manual v1 2 ...