Welcome, Guest. Please login or register.
November 21, 2024, 08:49:04 PM

Login with username, password and session length
* Home Help Arcade Login Register
.
+  Forum
|-+  **Video Slots** Gaming machines
| |-+  **Video Gaming Machines** **General Chat**
| | |-+  Neo Geo MV2F Backup Ram Region 555 FF40		 0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: Neo Geo MV2F Backup Ram Region 555 FF40  (Read 3860 times)
Claiker
New NLG Member 1 to 100 Post
**

Total Karma Storms: 0
Offline Offline

Posts: 9
« on: August 28, 2013, 07:04:08 AM »
Hi.

I´ve got a MV2F, i use universal bios 2.3. when i turn on display Backup Ram region 00D00010 5555 FF40. I think the two rams between suicide battery and the bios could be the problem.

I have tested the rams, some pins not signals, but i have not scheme to fix it.


Do you have any idea how to fix it?

Thanks.
 
Logged
Claiker
New NLG Member 1 to 100 Post
**

Total Karma Storms: 0
Offline Offline

Posts: 9
« Reply #1 on: August 28, 2013, 07:47:04 PM »
I have not signal /we in both cxk58257.

thanks
Logged
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #2 on: September 03, 2013, 02:26:37 AM »
Backup RAM is close to the battery... Look for the RAM that has pin 28 NOT connected to the +5v line on the JAMMA connector.

It's surface mount SRAM and you'll want to replace the one that is connected to the lower 8 data bus pins on the CPU.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #3 on: September 03, 2013, 02:27:20 AM »
Once you replace the bad Backup RAM it will continue on with the RAM tests and tell you if it finds any others as bad.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
Claiker
New NLG Member 1 to 100 Post
**

Total Karma Storms: 0
Offline Offline

Posts: 9
« Reply #4 on: September 05, 2013, 09:23:18 AM »
thanks for responding.

one of the rams was very hot, could be wrong, I've removed.

There are pins with corrosion.

I need to buy another ram to replace the bad.

The battery is removed,

If I can I will put a picture.


Is there any way of skipping the backup test ram?
« Last Edit: September 05, 2013, 09:41:07 AM by Claiker » Logged
Pages: [1] Go Up Print 
« previous next »
Jump to:  

SimplePortal Classic 2.0.5

If you find this site helpful, Please Consider Making a small donation to help defray the cost of hosting and bandwidth.



Newlifegames.com ™    Newlifegames.net ™    Newlifegames.org ™
   New Life Games ™    NewLifeGames ™  NLG ™ We Bring new Life to old Games ™    1-888-NLG-SLOTS ™
Are all Copyright and Trademarks of New Life Games LLC 1992 - 2021


FAIR USE NOTICE:

This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner.
We make such material available in an effort to advance awareness and understanding of the issues involved.
We believe this constitutes a fair use of any such copyrighted material as provided for in section 107 of the US Copyright Law.
In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those
who have expressed a prior interest in receiving the included information for research and educational purposes.

For more information please visit: http://www.law.cornell.edu/uscode/17/107.shtml.

If you wish to use copyrighted material from this site for purposes of your own that go beyond fair use,
you must obtain permission directly from the copyright owner.

NewLifeGames.net Web-Site is optimized for use with Fire-Fox and a minimum screen resolution of 1280x768 pixels.


Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
Loon Designed by Mystica
Updated by Runic Warrior
Page created in 0.084 seconds with 20 queries.