Mac 12" RGB Monitor 640x480 hack

[techknight]

There was a website that goes through modding the M1296/M1299 12" RGB LC topper to run at 640x480. 

Ill be damned if I still have the link. 

out of curiosity, does anyone have it bookmarked? 

 

[360alaska]

I bet it's almost the same as modding a CC

 

[techknight]

its similar but not the same. I remember reading the site not too long ago. DARNIT anyone have the link? 

 

[max1zzz]

Is this the one you are looking for?: http://mobley.jp/e05mod03.html

 

[uniserver]

Kinda cool

 

[techknight]

Oh thank you, your a savior! 

You get a cookie of the day. lol

Once I get my 12" RGB monitor rebuilt, I am going to do this mod eventually. I have a 12" RGB that came from uniserver that had a vertical issue I did a youtube video on, turns out a cluster of capacitors near the yoke connector, and horizontal drive transistor spilled its guts. 

So a recap is in order, plus a flyback changeout. Then were good

 

[MJ313]

I'll give you TWO cookies if you can do it all in one sitting AND video tape the whole thing. And then take a shot of moonshine at the very end and slam the empty glass on your bench, shouting HELLL YEAHHHHH

 

[Bunsen]

Looking forward to seeing how this goes, techknight

 

[Bunsen]

Looks like the hacker above had a second attempt at doing this mod in a slightly different way:
http://mobley.jp/e05mod05.html

As I said before, my VGA adapter was not very strong, and my children broke it by rough treatment. So I decided to modify monitor sense of the original cable connecter itself so that it would be permanently wired for VGA mode.

 

[techknight]

I have to change the cable out in mine anyway, it has an intermittent color when you twist the wire, so I will fix that then. 

Before I can do the hack though, I got to finish refurbing the analog board and getting it going again properly. 

 

[Scott Baret]

Any news on whether or not the IIGS monitor and LC Topper use the same flyback? I did go ahead and buy that flyback on eBay to repair mine.

I do have a IIGS monitor now but don't feel like cracking it open...

 

[techknight]

The flyback I ordered looks 100% identical to the one in my Mac RGB monitor, But I havent had a chance to swap it out just yet. 

 

[Scott Baret]

OK, a few questions here...

1. Is it possible to swap guts from monitor to monitor without desoldering the flyback? 

2. Does this monitor self-discharge when you unplug it?

3. Anyone have a list of caps for these monitors?

 

[techknight]

1. Yea, but you have to unhook the anode cap from the CRT

2. Yes with time. 

3. Working on it, eventually... 

 

[Scott Baret]

OK--I think I'm good on the first two. I'm thinking of doing a quick fix with my LC monitors until the original part can be repaired with both caps and a new flyback. 

One has its anode cap removed already, the other hasn't been powered up since 2013 so I think we're extra safe there

I just want my LC to run again I have an extra LC board and a re-capped power supply that I won't need for a few months that I can use as stopgaps until everything is refurbished.

EDIT: Once I get the board back, do you think maybe 3 days is sufficient to let the monitor discharge? I know I could use the discharge procedure but I trust the monitor discharging itself more than I trust myself doing that. (I honestly never discharge my Classics and SEs and have removed CRTs from them after having powered them down just a few minutes earlier).

 

[techknight]

usually the bleeder resistor in the flyback drains it within 15 to 20 minutes, but ya never know. 

 

[Scott Baret]

OK, I'm doing this tonight if all goes well.....any other things I should be aware of inside these monitors in terms of parts which may snap, etc?

 

[Johnnya101]

I'll give you TWO cookies if you can do it all in one sitting AND video tape the whole thing. And then take a shot of moonshine at the very end and slam the empty glass on your bench, shouting HELLL YEAHHHHH

I second. OP better deliver!!  

 

[techknight]

I dont drink, so that aint gonna happen.