(Topic ID: 202994)

HH - System 80 - Sound/Speech PSU - going bad?

By bklossner

6 years ago



Topic Stats

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

You

Linked Games

Topic Gallery

View topic image gallery

HH_Sound_Speech_PCB_2448x1428 (resized).jpg
#1 6 years ago

Hi everyone,

So, I'm getting ready to re-cap the Sound board to my Haunted House. I was poking around to see what else to add to the Mouser order and happened to look at the PSU for the sound board...

Umm, all of the diodes (CR1 and CR4-7) look like they are getting ready to fail. I have not taken my DMM to test them as I don't want to start a project *right now* but, bleh, look at 'em!

Everything works fine (this sweetheart is bulletproof) but I have noticed the sound has becoming more distorted over the past year (hence the re-capping project).

I have attached an image of the ugliness. I'll probably replace all of the diodes but just wanted to share this to see if my hunch is correct that these are on the way to failure.

Note, I'm quite sure these are original factory components. I know the electrolytics definitely need to be replaced.

Bleep bloop.

-Bob

HH_Sound_Speech_PCB_2448x1428 (resized).jpgHH_Sound_Speech_PCB_2448x1428 (resized).jpg

#2 6 years ago

Be very careful with those system 80 boards. It’s very easy to take the solder pads right off at the through holes of the components. Those traces are very fragile!

#3 6 years ago

The diodes don't look burned, the leads just look a little corroded (ok, a lot). If you are getting the proper output voltage I wouldn't change them, unless you just want to make them look pretty. I do change all the electrolytic capacitors on the both the Sound Power Supply and the Sound board, in fact I change them on every board I work on. That is a one sided board so there are no through holes, but still be careful of the traces

#4 6 years ago

Cooooool. Thanks for the advice. I think I'll leave the diodes alone for a while.

Thanks for the head's up about the pads. I have re-capped a lot of electronics in the past few years (pins and video game consoles) so I'm definitely aware of the perils of lifting pads. I learned this the hard way when I was first getting into fixing stuff. Unfortunately, the victim was my brother-in-law's Sega Genesis.

It's ugly, but it works, and that's fine by me.

Promoted items from Pinside Marketplace and Pinside Shops!
From: $ 10.00
Playfield - Toys/Add-ons
Toast-Mach1 Mods Shop
 
2,950 (OBO)
Machine - For Sale
Shakopee, MN
$ 1.29
Playfield - Toys/Add-ons
Daddio's 3D Printed Mods
 
$ 83.00
Electronics
PinballReplacementParts
 
$ 1,159.00
Flipper Parts
Mircoplayfields
 
From: $ 1.00
Playfield - Other
Rocket City Pinball
 
3,950 (OBO)
Machine - For Sale
Centerport, NY
Great pinball charity
Pinball Edu

Reply

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/hh-system-80-soundspeech-psu-going-bad 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.