Action Pinball - Stern Whitestar Sound Modification

Stern Whitestar Sound Modification

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Stern Whitestar Sound Modification

- NOTICE AND DISCLAIMER REGARDING ALL TECHNICAL ARTICLES ON THIS SITE -
Many of the Technical Articles on our site contain information and directions involving electronics and circuit board repair. They are authored with the assumption that the reader has adequate experience and knowledge required to do the work being described.

If you do not feel qualified, or are in any way uncomfortable doing any of the work described in any of the articles, then we strongly recommend enlisting the help of a qualified repair person or shop who can do the work for you. It may save you cost, time, and further repair work.

We (Action Pinball & Amusement, LLC) are not responsible for any damage to you, your game, or your property, from doing any work on your game related to any of the articles listed on this site.

Parts & Supplies: Free free to contact us if you have any questions about parts that we sell which are mentioned in any of our Technical Articles.
Technical Help & Questions: We do not provide remote assistance with diagnosing and repairing games. We are mainly a parts supplier and do not have the time or resources to provide such services. Here are some other options you can explore for help:
- Our Repair Services: If you have a game that you may want us to service or repair, please see our Game Service & Repair page for further info.
- Do-It-Yourself: For information on working on your own game, you can find some online information at these sites: www.pinrepair.com, www.homepinballrepair.com, and www.pinwiki.com
- Other Sources:
  - Online troubleshooting with Skype or Zoom: Randy Fromm
  - Online pinball forums: www.pinside.com
  - Pinball circuit board repair shops: See listings on our Service & Repair page.
  - Find a local pinball repair person or company in your area: See "Service Outside Our Area" on our Service & Repair page
  - Find a local TV/VCR repair shop for general electronic repairs: Do a Google Search

This simple modification will reduce or eliminate background noise (buzz/hiss/static/hum) on Stern Pinball games with the Whitestar MPU/Sound board.

A 10k ohm adjustable pot (potentiometer) can be added across resistors R106 (backbox sound) and R110 (main cabinet sound). Adjusting these pots should reduce or eliminate background noise to an acceptable level.

This example pic shows pots connected across both resistors on a Whitestar MPU/Sound board with removable test-lead clips:

We do not carry these parts, but you can typically find them available from online sources such as Amazon.com, eBay.com, or mouser.com.

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