(Topic ID: 299202)

RBION Sound Issue

By kactussjack

3 months ago

Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 47 days ago by LOTR_breath
  • No one calls this topic a favorite


Linked Games

#1 3 months ago

I've searched the forum but couldn't find a thread regarding the exact symptons I'm seeing. Most of the time, but not always, when I turn the game on there is no sound. If I turn the game off and turn it back on the sound returns, but often, not always, it comes on at full volume for a second or two before returning to the normal volume. Once I have sounds, they play correctly. The CPU/Sound board is 520-5300-00 and is running sound OS 4, which is the original configuration form Stern. Would upgrading to sound OS 8 solve this problem or should I look elsewhere on the board: Amplifier, Pre amp, caps? I have tried reseating U-7 and board connectors but no change. I should mention that this problem has come on gradually, ie, when I purchased the game 3 years ago this did not happen.

Thanks for looking.

#2 3 months ago

I'd turn the game off, and reseat MPU connectors for audio.

See if that helps.

LTG : )

#3 3 months ago

Reseating connectors has already been tried.

1 month later
#4 47 days ago

Still looking for help on this. I have replaced U30, then U26, then U7. No sound. Today I started up the game to check voltages and there is sound, but very loud. The volume control works, but 5 times louder than it was. Turning it down, minimum volume is way too loud. one step lower and it goes to mute. I have no idea how or where the volume is controlled on the Whitestar II boards.

There is absolutely no info on line about this problem.

Thanks for any help.

#5 47 days ago

Check all of your DC test point voltages. Many years ago I had a MSF that suddenly had very quiet sound. The -12vdc was way off and I found a bridge rectifier that was faulty.

Also, read this info at link: https://techniek.flipperwinkel.nl/desega/index3.htm#sound

Stern Whitestar evolved from DE/Sega so the principles are the same.

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