need Help with Gradius IV PCB- They Suicide?! (a little bit)

rtw · Post by **rtw** » Thu Sep 18, 2008 9:05 pm

honorless wrote:Aww damn, I was hoping this thread would turn into a goldmine of basic technical instruction since I'm such a newb. I'll have to look up those videos myself now...

Start here for soldering:

http://www.youtube.com/watch?v=I_NU2ruzyc4

rtw

honorless · Post by **honorless** » Thu Sep 18, 2008 9:52 pm

Thanks for being such a cool guy, rtw.

footix · Post by **footix** » Mon Nov 24, 2008 5:50 pm

I just won on yahoo a pcb with the same issue. Any help to source the required parts is welcome. I'm located in Belgium. Thanks guys!

footix · Post by **footix** » Mon May 04, 2009 8:49 pm

that crap gets me mad!

I bought 2 replacement chips off ebay. Desoldered the pcb timekeeper, put a socket on... And I still get the same error even with the two remplacement chips.

With no chips on I get RTC Device Error at 35D.

With a chip on I get RTC checksum error - factory settings.

Could it be possible that the remplacement chips I got are faulty (or that battery went flat with time on those?)

dpful · Post by **dpful** » Tue May 05, 2009 1:52 am

I have the same (socket and 2 or three chips), and I've discovered that sometimes it will give me the error (the factory settings one) and then if I wiggle and readjust the jamma connector board, it solves the problem-- so the batteries must not be draining so fast.. It works after that. It's happened to be maybe three times.

footix · Post by **footix** » Tue May 05, 2009 5:27 am

I'm using the JVS inputs so dunno what to think!?

I'm wondering if my chips are ok or not...

rtw · Post by **rtw** » Tue May 05, 2009 6:44 am

footix wrote:that crap gets me mad!
With no chips on I get RTC Device Error at 35D.

With a chip on I get RTC checksum error - factory settings.

The fact that it changes indicates that the PCB sees the device

Is this the message that you get ?

RTC CHECKSUM ERROR!

SET TO ALL FACTORY SETTINGS

PRESS TEST SWITCH TO CONTINUE

If so what happens when you press the test switch ? Do
you get to the screen where you adjust the clock ?

There is a test switch on the "front" PCB in case you do
not have one mapped on your setup.

footix · Post by **footix** » Tue May 05, 2009 3:36 pm

Yeah precisely! It gets to the screen where it asks for time difference, and time / date settings. If I setup the info, the game works. But it gives back the error once I shut off the cab... Like if the internal battery was flat

Could someone try my rams maybe? I'd pay for the time put into that. Or maybe someone has a good known ram?

Thanks

footix · Post by **footix** » Tue May 05, 2009 6:31 pm

Ok just done it... That was precisely what I thought, the nos rams had flat batteries!

I drilled one of these, and put a CPS2 type battery there. Now working!!!

Thanks for your time rtw & dpful!

rtw · Post by **rtw** » Tue May 05, 2009 7:41 pm

footix wrote:Ok just done it... That was precisely what I thought, the nos rams had flat batteries!

I drilled one of these, and put a CPS2 type battery there. Now working!!!

Thanks for your time rtw & dpful!

I was going to ask you to check the production date but I see there
is no need for this now

Got a picture of the mod ?

footix · Post by **footix** » Tue May 05, 2009 8:46 pm

I'll take the girl camera so I can do some high res pics !