New! Dark mode!

Browsing Pinside at night? Getting tired of all the white? Switch to dark mode using the button in the top right (or CTRL-B)!

(Topic ID: 208261)

LAH dryed caps. Help


2 years ago

Topic Stats

  • 14 posts
  • 6 Pinsiders participating
  • Latest reply 2 years ago by mikat11
  • No one calls this topic a favorite


Linked Games

Topic Gallery

One image has been uploaded to this topic. (View topic image gallery).

DEJP_PwrSply_C2_Damage (resized).jpg

You're currently viewing posts by Pinsider mikat11.
Click here to go back to viewing the entire thread.

#4 2 years ago

Power supply board ,replace caps C1,C2,C3,C7. These are near the big aluminum heat sink and dry out over time and it takes a minute or more for them to charge up and supply 5 volts to the CPU board and the sound board. C2 is especially prom to leakage and failure. A very common problem on Data East power supplies.

#7 2 years ago

Like I said before. C2 is prone to leakage and failure. The heat from the 5 volt regulator heat sink is hard on poor little C2 and replace C1 C3 and C7 also.

#9 2 years ago

Same uf value, higher voltage is ok for any of those 4 caps. For example C2 is 100uf 25 volt. A 100uf 35 volt will work fine. Low voltage due to bad caps is the problem here. On initial power up the voltage in the 5 volt circuit is very low, probably near 4 volts. After a couple minutes or so the bad cap will charge up to near 5 volts and the CPU will power up like it should,then the sound board shortly after. Most likely C2 is the root of the problem and the other 3 caps need replaced because they are old and its a good preventative maintenance.

#14 2 years ago
Quoted from DEN:

Well that sounds risky with the fire. Do you have a pic of the location? Whitch cap it is?


Promoted items from the Pinside Marketplace
From: $ 369.95
$ 35.00
Cabinet - Other
Arcade Upkeep
2,900 (Firm)
Sale Pending!
Ronkonkoma, NY
Machine - Wanted
West Springfield, MA
2,800 (Firm)
Sale Pending!
Louisville, KY
From: $ 20.00
Cabinet - Other
Rock Custom Pinball
$ 12.50
Cabinet - Sound/Speakers
Gweem's Mods
From: $ 40.00
Lighting - Interactive
Professor Pinball
$ 229.99
$ 25.00
$ 28.00
Lighting - Other
Rock Custom Pinball

You're currently viewing posts by Pinsider mikat11.
Click here to go back to viewing the entire thread.

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside