(Topic ID: 11315)

Replacing batteries with a memory capacitor

By PinballHelp

12 years ago


Topic Heartbeat

Topic Stats

  • 67 posts
  • 22 Pinsiders participating
  • Latest reply 5 years ago by jlbintn
  • Topic is favorited by 11 Pinsiders

You

Linked Games

No games have been linked to this topic.

    Topic Gallery

    View topic image gallery

    untitled (resized).JPG
    Screenshot_20190130-172203~01 (resized).png
    IMG_9855 (resized).JPG
    IMG_9856 (resized).JPG
    Screenshot_20190129-181533 (resized).png

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

    #46 5 years ago
    Quoted from jlbintn:

    update, left the game off for approximately two hours, unplugged for the last half of that. All settings lost. And the junk in the registers was back.
    I ordered the NVRAM for this game and for LOTR.

    While NVRAM is 100% the way to go, if you are still curious what's happening you can make three checks. You should check to see what the battery voltage is at the board. Preferably at the actual 6116 ram but you could sub just checking where the 2 wires from your remote battery pack are soldered. Check with power on, right after turning power off, and then after you have waited long enough that you think it has failed.

    With new batteries, it should always measure at least 4 volts (very close to 5 with power on). It sounds like it is dropping below 2V (which is the typical minimum standby voltage required by most CMOS rams) after being off for an extended period of time. Your board might even have a non-low power RAM chip that might not even hold data at lower voltage values.

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

    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/replacing-batteries-with-a-memory-capacitor?tu=cactusjack 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.