MSX problem!

[ave]

Bas wrote me the following:

broken ground gives no signal

solder all point of the connector in the computer.
It is not to see if there is a little crack.

I'll resolder it during the next days, when I have access to my tools. Hopefully that will help.

But anyway, I got quite a lot advice on msx.org, such as measuring all the DIN connectors separately with a voltmeter, but I'm lacking one so that's not really an alternative right now :/

That's the thread on msx.org:
http://www.msx.org/forumtopicl10911.html

[Arkhan]

Ahh, I see. Well good luck with the soldering.

not to get into it (the misleading msx.org drama) toooo much, but take MSX.org information with a grain of salt. Sometimes youll get some pretty stupid suggestions that you'd swear were cooked up while on meth.

Looks like you got pretty lucky and got normal responses. You're better off asking Bas directly for help with any problems.

good luck and keep us posted

[ave]

I've resoldered the joints today. Added a little solder here and there, but unfortunately nothing has changed Just the same as before, the picture is showing up but flickers as much as it did before!

Here are two pictures of the resoldered DIN out:

http://img696.imageshack.us/img696/999/resoldered.jpg
http://img408.imageshack.us/img408/2535/resoldered2.jpg

I'm beginning to think I'd maybe just better use it with with a simple rca cable. Or maybe sell it to someone outside of Europe where missing RGB isn't so much of a setback :/

[Arkhan]

well, id never turn down buying another sony msx....

but ah, did you ask bas about that monitor? A few monitors Ive tried in the past, all of the Commodore variety, turned out to be randomly incompatible, so maybe confirm your monitor with him.

[ave]

I asked him but it's the right one. The Philips monitors are frequently used for older RGB devices such as home computers or Mega Drive, PC-Engine et cetera. He even sells the exact same model as MSX accessory.

However, I've found a weird solution for the actual RGB problem:



I resoldered joints #1 & #2 near C34 how Jipe (msx.org) suggested, but it didn't help. I hooked it up via RCA prior to RGB and didn't remove the RCA cable when I tried it with RGB. Miraculously I was confronted a PERFECT RGB IMAGE all of a sudden!!



When I remove the RCA cable from either the monitor or the MSX, the image starts flickering again. With both cables connected, however, the picture is stable and is not disturbed even when I touch or move the DIN plug around a bit.

I am no electronics freak but that seems to me like a grounding problem of the Video area. Or maybe the MSX takes the V-synch from the cinch cable b/c it doesn't work on the RGB out? I've no idea, but at least it works after all!


Cheers!

[Arkhan]

Oh, thats a solution I have used in the past to ghetto-rig cables, lol.


That probably means the monitor itself has a dodgy connector and the sync isn't strong, or isn't syncing at all!.

I advise using this RCA for sync solution. Don't open the monitor. Blowing your self up over it isnt worth it.

I made a cable one time that is both the RGB and RCA in one cable so its a bit neater. You can mimic that with a few zip ties or some tape.

[blue lander]

I've used a lm1881 in the past when a computer was outputting a weak or screwy sync signal. It's normally used for splitting a sync signal, but it'll generate its own sync pulses if the input sync is too weak.