MATRIXSYNTH: Roland JX-3P with PG-200 Programmer

Tuesday, May 11, 2021

Roland JX-3P with PG-200 Programmer

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"Just serviced and calibrated great condition Roland JX-3P -- comes with the original PG200 programmer.

Everything on this 3P functions perfectly -- this 3P has been future proofed and will be good to play for another 10+ years to come if taken care of.

Service work performed include:
1. Complete power supply rebuild -- filter caps, bypass/decoupling, and linear voltage regulators were replaced (Panasonic FR series electrolytic capacitors used); rails were checked and calibrated. Main board internal memory battery replaced.
2. Main board polarized and bi-polar electrolytic capacitor were replaced with audio grade Nichicon Muse Gold / Elna RFS SILMIC II and Panasonic FR series for decoupling.
D/A offset, VCF Tune, VCF Resonance, VCA DC offset, reference voltage, and master oscillators were all calibrated after cap replacement.
3. Jack board capacitors replaced with audio grade bipolar / polarized electrolytic where applicable.
4. Control board PCB (trace side) was cleaned thoroughly with 99% isopropyl.
5. Control board capacitors replaced with audio grade bipolar / polarized electrolytics and Panasonic FR series for decoupling.
6. Control board volume potentiometer, brilliance / sensitivity / sequencer rate faders were all unsoldered and cleaned with isopropyl, dried, and relubricated with a light application of deoxit.
7. The two original noise prone Panasonic MN3009 ICs of the chorus section were replaced with socketed low noise contemporary clone remakes made by Xvive (Xvive MN3009) -- original Panasonics can be included with the transaction.
8. Inside chassis cleaned of debris and dust."

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