(Topic ID: 133213)

Burned R53 and R59 on Stern 200 solenoid driver board

By patrickvc

7 years ago

Topic Stats

  • 6 posts
  • 3 Pinsiders participating
  • Latest reply 7 years ago by Evets
  • Topic is favorited by 1 Pinsider


Linked Games

#1 7 years ago

Just turned on Seawitch for the first time and upon start up, the small R59 next to the large C26 capacitor burned up, then I noticed that R53 was burning up too. I have a new rectifier board installed. The cpu is a solid led. I get humming from the speaker. I know the caps on the SDB probably need replacing.

#3 7 years ago

Correction sdu100 board and c23 cap

#4 7 years ago

Your MPU is not booting, so something is wrong there, but first, I'd check & fix the test points on the SDB.


Find the readings (TP1 thru TP5) that are not in spec and work from there to get the SDB working 100%, then move to the MPU. If the big cap is original, it needs to be replaced--that will probably fix the speaker hum.

#5 7 years ago

Should I continue even though the resistors are burned up to measure test points. Are the values of the resistors on the schematic?

#6 7 years ago

I almost always rebuild/replace the high voltage section and 5V sections on my Stern and Bally SDBs as part of the bulletproofing process. Big Daddy Enterprises is a good vendor and has a variety of helpful kits with the needed parts already gathered and itemized, and some linked pictures, for the 5V and the high voltage sections. Great Plains Electronics is my favorite source (usually faster shipping to me and the best parts labeling in the business) for electrical components and should have the parts you need as well. As mentioned above, test the power setup one leg at a time. If the power to the rectifier board checks out, then move on to the SDB, and test it without the further-down-the-line items attached. After that, you can rule out power issues as you deal with potential MPU problems (bad chip, battery acid leakage, and so on). Also, expect to replace and repin connectors on this era of pin, both header and socket pins, in the .100 and .156 flavors.

Promoted items from the Pinside Marketplace
6,500 (OBO)
Machine - For Sale
Redondo Beach, CA
$ 55.00
$ 399.95
Lighting - Led
Pin Stadium Pinball Mods
$ 5.95
Playfield - Protection
The Pinball Scientist
$ 149.95
Machine - For Sale
St. Marys, PA
$ 7.00
Yorktown Arcade Supply
$ 300.00
Cabinet Parts
Fantastic Pinball Inc.
Cabinet parts
$ 10.00
From: $ 115.00
Playfield - Protection
Beehive Pinball Co.
$ 649.95
Lighting - Led
Pin Stadium Pinball Mods
$ 45.00


Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!

This page was printed from https://pinside.com/pinball/forum/topic/burned-r53-and-r59-on-stern-200-solenoid-driver-board and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.