# W-30 - Problem following the installation of a new jack board

**URL:** <https://forums.syntaur.com/t/w-30-problem-following-the-installation-of-a-new-jack-board/9533>\
**Category:** Synth Repair\
**Tags:** roland, no-audio\
**Created:** [August 14, 2026, 3:54pm UTC](https://forums.syntaur.com/t/w-30-problem-following-the-installation-of-a-new-jack-board/9533 "2026-08-14T15:54:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![NikBo](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/n/35a633/32.png) [@NikBo](https://forums.syntaur.com/u/NikBo)\
**Post date:** [August 14, 2026, 3:54pm UTC](https://forums.syntaur.com/t/w-30-problem-following-the-installation-of-a-new-jack-board/9533/1 "2026-08-14T15:54:13Z")

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W-30 - Problem following the installation of a new jack board

I recently tried installing a new jack board in my W-30. The new board only outputs a weak signal on the left side via Output 1 (and there is no sound from the headphone output).

I reinstalled the old jack board, and everything went back to normal; the headphone signal returned to its proper level.

I tried installing the new jack board a second time. The result was the same: still no sound from the headphone output and a very weak signal on the left side of Output 1 only.

I put the old jack board back in one last time, and the sound returned to normal.

Is there something I’m overlooking or doing wrong?

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**Author:** ![Didier](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/d/41988e/32.png) [@Didier](https://forums.syntaur.com/u/Didier)\
**Post date:** [August 18, 2026, 8:08am UTC](https://forums.syntaur.com/t/w-30-problem-following-the-installation-of-a-new-jack-board/9533/2 "2026-08-18T08:08:47Z")

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What was the reason for the replacement ?  
Was something broken on the old board ?

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<div class="post-metadata">

**Author:** ![NikBo](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/n/35a633/32.png) [@NikBo](https://forums.syntaur.com/u/NikBo)\
**Post date:** [August 18, 2026, 2:05pm UTC](https://forums.syntaur.com/t/w-30-problem-following-the-installation-of-a-new-jack-board/9533/3 "2026-08-18T14:05:16Z")

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Thanks for the feedback, Didier—do you speak French?

Regarding the original jack board on my W-30, the input gain knob is physically defective. I figured it would be easier to replace the entire board (no soldering required) than to try and source the specific knob and replace it (which involves soldering). Absolutely _everything_ on the old board works (inputs and outputs) _except_ for the input knob. Currently, I cannot select the desired entry level.

However, as I mentionned, when I install the new board, nothing happens at all. Yet, there’s no way to get the connectors wrong, as they can only be plugged in one way. I really don’t understand what’s going on, and so far, Syntaur (who sold me the new board) has remained silent.

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**Author:** ![Didier](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/d/41988e/32.png) [@Didier](https://forums.syntaur.com/u/Didier)\
**Post date:** [August 18, 2026, 2:54pm UTC](https://forums.syntaur.com/t/w-30-problem-following-the-installation-of-a-new-jack-board/9533/4 "2026-08-18T14:54:48Z")

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Based on the attached analog board schematic, the PHONES output is connected to output 1. Therefore, if output 1 is faulty, the PHONES output cannot work.

 ![Roland W-30 Analog Board](https://forums.syntaur.com/uploads/default/original/2X/9/992a5eb39cf4166d191a3e117faa8902a0960f73.jpeg)

As you can see from the schematic, several components could be causing the fault.  
If you have some electronics skills and the necessary equipment, we can troubleshoot the issue together.  
Otherwise, I believe replacing the faulty potentiometer would be the quickest and least expensive solution.