Results 1 to 11 of 11

Thread: Options for fast draining ram on 2F board, battery mod already in place

  1. #1
    Belnar Institute Student
    grendelrt's Avatar
    Join Date
    Apr 2014
    Location
    VA

    Posts
    621

    Options for fast draining ram on 2F board, battery mod already in place

    I replaced my battery with a coin cell battery when I first got the board (2F). But it seems the board in power down state drains the battery super quick, usually in a couple weeks or so. I saw some boards have more drain than others. Was looking for advice on what to replace the coin cell with now. Would it be possible to go to triple or double A batteries and put back the 470ohm resistor? The cabinet some times can go weeks before being powered on so I want something that can last much longer than the coin cell.

  2. #2
    Kula's Candy
    DasiyAge's Avatar
    Join Date
    Jun 2018
    Location
    United States

    Posts
    306
    There's a few other threads with the same issue, I'd start by looking at those and trying those fixes. I'll try and link them later but it should be an easy enough thing to find through google.

  3. #3
    Belnar Institute Student
    grendelrt's Avatar
    Join Date
    Apr 2014
    Location
    VA

    Posts
    621
    Quote Originally Posted by DasiyAge View Post
    There's a few other threads with the same issue, I'd start by looking at those and trying those fixes. I'll try and link them later but it should be an easy enough thing to find through google.
    Yeah I found this one in the old battery thread. I guess I just need to find a battery pack with 3.7v and use a charging circuit (lithium only maybe)?

    http://www.neo-geo.com/forums/showth...=1#post4029545
    Last edited by grendelrt; 10-20-2020 at 08:46 AM.

  4. #4
    JammaNationX
    Xian Xi's Avatar
    Join Date
    Dec 2005
    Location
    Waipahu, Hawaii

    Posts
    27,610
    Usually it's a failing part in the charging circuit, most likely a bad cap or diode.

  5. #5
    Belnar Institute Student
    grendelrt's Avatar
    Join Date
    Apr 2014
    Location
    VA

    Posts
    621
    Quote Originally Posted by Xian Xi View Post
    Usually it's a failing part in the charging circuit, most likely a bad cap or diode.
    Even if you are not using the charging circuit anymore (removed 470ohm)?

    How long should a 2032 last if you have disabled the 470ohm resistor?

  6. #6
    JammaNationX
    Xian Xi's Avatar
    Join Date
    Dec 2005
    Location
    Waipahu, Hawaii

    Posts
    27,610
    They’re part of the charging circuit per se but are used for stopping the current going through wrong way so if it’s failing then some will leak out.

    Usually if everything is good, the battery can last at least 6 months. I’ve had an MV1C that lasted just over a year.

  7. #7
    Belnar Institute Student
    grendelrt's Avatar
    Join Date
    Apr 2014
    Location
    VA

    Posts
    621
    Quote Originally Posted by Xian Xi View Post
    They’re part of the charging circuit per se but are used for stopping the current going through wrong way so if it’s failing then some will leak out.

    Usually if everything is good, the battery can last at least 6 months. I’ve had an MV1C that lasted just over a year.
    Thats good to know! Would you replace the diodes and caps in that general area? Or are there some that could be across the board? I have a bunch of caps and resistors here, might have to order some diodes. I might put back the charging circuit and get a rechargeable 2032.

    Would replacing this area be enough? (Your Pic btw ha) 2fbat1.jpg
    Last edited by grendelrt; 10-22-2020 at 03:27 PM.

  8. #8
    Belnar Institute Student
    grendelrt's Avatar
    Join Date
    Apr 2014
    Location
    VA

    Posts
    621
    Would this battery work if I reinstated the 470OHM resistor? It's NI-CAD, 3.6V.

    https://www.amazon.com/Radio-23-193-...3654864&sr=8-3

  9. #9
    JammaNationX
    Xian Xi's Avatar
    Join Date
    Dec 2005
    Location
    Waipahu, Hawaii

    Posts
    27,610
    Yup

  10. #10
    Paris-Dakar Rally Driver
    Dakar 2003
    Jonap's Avatar
    Join Date
    Oct 2006
    Location
    Spain

    Posts
    67
    Quote Originally Posted by Xian Xi View Post
    Usually it's a failing part in the charging circuit, most likely a bad cap or diode.
    Hi, diodes usually can fail too? what are typical symptoms?
    i found capacitor list for each MVS but not the other list of components like diodes, do you know where i can found it? thanks!

  11. #11
    Belnar Institute Student
    grendelrt's Avatar
    Join Date
    Apr 2014
    Location
    VA

    Posts
    621
    Quote Originally Posted by Xian Xi View Post
    Yup

    Thanks! I will replace the caps in the area and give this a battery a shot.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •