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Old 27 January 2009, 06:48   #21
Akira
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Hahaha!
I removed the RF from one motherboard, was a bit of a bitch to take out... I hope I can find a better method to do in the non-practice board...

Anybody has tips?
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Old 28 January 2009, 01:36   #22
r0jaws
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Now those are some nice hacks, good work fella.
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Old 15 July 2009, 09:16   #23
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What's the pinout on the RF modulator anyway? Maybe the connector could be used to run an internal speaker?

The last two pins (going from left to right with the motherboard facing forward) are +5V and GND, but I can't trace the first two.

Last edited by papa_november; 16 July 2009 at 03:08.
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Old 12 October 2018, 15:42   #24
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Quote:
Originally Posted by Akira View Post
Hahaha!
I removed the RF from one motherboard, was a bit of a bitch to take out... I hope I can find a better method to do in the non-practice board...

Anybody has tips?
I'd be interested in knowing this as well. Whenever I've tried to desolder (anything) I've usually ended up cutting off the solder with a flush connector for parts or all of it.

Just really afraid to botch this fairly new 1d board trying to accomplish this.
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Old 12 October 2018, 15:47   #25
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S*it, I just realized this was an almost 10 y/o thread. Starting to feel like a necrophile... Sorry for digging it up.
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Old 12 October 2018, 16:31   #26
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S*it, I just realized this was an almost 10 y/o thread. Starting to feel like a necrophile... Sorry for digging it up.
Jeezo - necroposter maybe, but necrophile?! don't be so hard on yourself!

Anyway yeah the whole shield around the RF modulator acts as one massive heat-sink. Removing what you can beforehand will help a great deal, especially if your iron isn't particularly good.

Just be careful where the 4 pins (the actual data/power pins) connect to the amiga. Perhaps cut those first down the middle if possible to prevent pulling them from the board, and deal with the remaining half on the amiga later.

I destroyed one solder pad pulling the modulator out of my 600 because those pins were either not hot enough or so hot they melted the board around them. (It is actually charred a little). Removing the shielding itself (and thus the remainder of the modulator) shouldn't be an issue in this way.

Unless of course you plan on keeping the modulator intact!

Bottom line: the less you have to heat the miggy up the better. The more of the modulator you can remove/destroy/disconnect before taking an iron to the rest is probably the best way of not harming the motherboard. But thats just my opinion.

John
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Old 13 October 2018, 00:17   #27
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Thanks for your suggestions, John. The issue before has always been that the pins were not hot enough.

I've had this problem when removing the battery from the 501 RAM expansions, for instance. The last A-501 was more or less impossible to get the proper amount of heat to desolder it, and I ended up cutting the pins off instead (not to mention the shielding, which had tons of solder compared to a previous A-501 board I did, where the three contact points for the battery was able to be desoldered relatively easy)

Still contemplating whether to do it on the RF, but I will definitely remove the shielding from it first in order to disassemble as much as possible before I let the soldering iron loose on the board!
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Old 13 October 2018, 01:05   #28
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Yeah the trouble with using more heat or a longer heat is that sure eventually it'll drop out, but only when the shield is heat saturated, at which point more and more heat is going into the board. I think that's how I did damage to one of the traces around the modulator (not a problem though as it was modulator related)
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