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Arcade Collecting => Miscellaneous Arcade Talk => Topic started by: CodeWhite on May 30, 2009, 08:37:17 pm

Title: Problem With Revolution X
Post by: CodeWhite on May 30, 2009, 08:37:17 pm

I just bought a Revolution X a couple of days ago that was working perfect in the shop and when I got it home. Yesterday while I was playing I noticed vertical lines starting to appear in the background. I rebooted the machine and during the start up check I got two red RAM chips (U38,U62) I checked the board and as I feared these chips are soldered directly to it.

My question is: Are these chips easily replaced or is my board screwed? Also, Is this something I should try and repair myself (no soldering experience) or should I call a tech? Finally I find it kind of weird that these two chips blew at the same time while I was playing. Should I be checking something else?
Here are a couple pictures of the screen so you know what I mean.

Thanks in advance for the help.
CodeWhite

Title: Re: Problem With Revolution X
Post by: Turnarcades on May 30, 2009, 10:48:01 pm

As long as you can see the solder points it shouldn't be difficult to obtain another board and swap them out yourself, though the game is hardly a classic and is not in dire need of preserving. May do better to try find a better working PCB and bin that one you have.

The reason they could have blown could be a variety of reasons. You may have seen it running but it could have been mistreated in storage, and a few minutes' testing would not show up some problems. Lingering damp for example or damaged solder points may have bridged connections and caused short-circuits once the machine was sufficiently warmed up. Transporting the machine may also have caused stresses that dislodged or further affected power supply wiring and weak terminal points where cabling meets sensitive parts.

Title: Re: Problem With Revolution X
Post by: channelmaniac on June 01, 2009, 05:40:07 pm

I can repair it if I can get the RAMs.

What's the part # on the tops of them?

Title: Re: Problem With Revolution X
Post by: CodeWhite on June 01, 2009, 08:55:10 pm

Channelmaniac,

Here are the markings on the chips:

Japan 9344
HM538123AJ-8
A2005990

Let me know what you can do.

Thanks
 CodeWhite

Title: Re: Problem With Revolution X
Post by: YoGaBaR on June 01, 2009, 09:57:45 pm

Dont know if this will help but here is where you can get a manual for the game.
http://arcarc.xmission.com/PDF_Arcade_Manuals_and_Schematics/

Title: Re: Problem With Revolution X
Post by: channelmaniac on June 02, 2009, 04:34:21 pm

OK,

Should be the same as the MC42T8218 chip. I have some of those on a parts board that I know are good.

Are you OK with swapping out the chips? If not, I do it as a service.

RJ

Title: Re: Problem With Revolution X
Post by: CodeWhite on June 20, 2009, 02:48:53 pm

Thanks for all the replies.  I pulled the board and found on the underside that it had been worked on. Someone did a crappy job of installing some jumper wires, one of them wasn't even insulated!.  I had a local tech take the jumpers off and re-do the job and I now have a perfect working game.  Again thanks for all the help guys.

CodeWhite