Amiga.org
Amiga computer related discussion => Amiga Marketplace => Topic started by: on January 26, 2008, 05:18:34 AM
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Hello everyone,
Just to let you know that I can still make replacements for these PAL logic chips.
The replacements I make do not use the old PAL technology, they are made using the more modern GAL CMOS chips.
The GAL chips are 100% electrically compatible with the old chips but they tend to fail much less often because they produce much less heat.
If you repair this type of machines and want replacements, here is your opportunity.
If you have an Amiga 3000 and use it often, here's a great chance to update your machine and replace these 4 chips before they fail.
Thank you all!
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How much do you want for the set of four?
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Oops! Forgot pricing!
That's normally 8$ per chip.
A set of all 4 chips is 25$ (instead of the normal 32).
CANADIAN DOLLARS ONLY.
Shipping depends on your location.
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cool.. do you take PayPAL and ship to Australia :)
Az
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Azryl wrote:
cool.. do you take PayPAL and ship to Australia :)
Az
To both of these, the answer is yes.
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Shipping to Canada: depends on your postal code
Shipping to the US: airmail is 9$
Shipping to rest of the world: most countries, including europe is 10$ for airmail.
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You may as well offer GAL upgrades for A3640 v3.0/3.1 -> V3.2
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If you or anyone else needs them, I can supply programmed GALs for A3640. The one you'd most likely be after is U209 rev -03
More detail on A3640 upgrade and history here (http://www.amiga-hardware.com/showhardware.cgi?HARDID=223).
I can do A3000 GALs as well. More info and contact details here (http://amiga.serveftp.net/A3000_HardwareGuide/heat-u202.html).
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alexh wrote:
You may as well offer GAL upgrades for A3640 v3.0/3.1 -> V3.2
This requires changing U209 on the A3640 which is a soldered PLCC chip.
The jedec for this chip is freely available here: http://www.thule.no/haynie/cpumods/a3640/pals/rev2/bctl.jed
I can very easily make that chip for 12$/piece. However, this replacement requires surface mount soldering/desoldering and unlike the DIP chips in the 3000, not everyone can just unplug the old/defective chips and plug in the replacement.
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You wouldn't happen to have some Lattice GAL22V10-25LP chips?
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I have already bought one set of these for one of my A3000's from Eslapion and was more than satisfied!! I plan on ordering 2 more sets for my other 2 3000's. With heat being one of the main shortfalls of this Amiga computer these cooler chips are a must have for the serious user. You can get the newer DMAC, SCSI, RAMSEY, and BUSTER chips but until you have these you're A3000 isn't completely updated. JMHO
Dan :-D
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@eslapion,
I would like two complete sets please. Send me a PMail with the email address you use for Paypal and the total amount with shipping to Zip code 92314 in the USA.
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Iggy_Drougge wrote:
You wouldn't happen to have some Lattice GAL22V10-25LP chips?
What package (PLCC, DIP, etc) would you like?
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I'ld like one full set for my A3000, too. Could you PM me with the necessary details (Paypalstuff, total amount to be paid, including shipping to the Netherlands)?
Tnx! :-)
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Jiffy wrote:
I'ld like one full set for my A3000, too. Could you PM me with the necessary details (Paypalstuff, total amount to be paid, including shipping to the Netherlands)?
Tnx! :-)
PM sent!
Thank you for your support!
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And chips received!
I think I'm going to make my A3000 happy next weekend. ;-)
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That reminds me to eventually replace those chips with some of your chips in my A3000, too. :-)
Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
The Other Group of Amigoids
http://www.calweb.com/~rabel1/
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Hi
As it happens I have a 3000T mobo laying around wich only shows the dreaded black screen of death. (no activity what so ever, only powerled goes green)
Is there a possibillity that theese chips could be at fault then? What do they do?
Regards
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Bandis wrote:
Hi
As it happens I have a 3000T mobo laying around wich only shows the dreaded black screen of death. (no activity what so ever, only powerled goes green)
Is there a possibillity that theese chips could be at fault then? What do they do?
Regards
In this case, truly, many things could be wrong. So I wouldn't want to point you in the wrong direction.
I have a similar problem with an A3000D Mobo and it turns out the CPU is dead. That's not something I can desolder from the board so this board will be depopulated and trashed.
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I have a similar problem with an A3000D Mobo and it turns out the CPU is dead. That's not something I can desolder from the board so this board will be depopulated and trashed.
FYI, I have 2 A3000's that suffered the same problem. On the first I simply cut the legs away from the CPU with a very sharp exacto blade. Once the chip was out, it was easy to unsolder the the legs from the motherboard. A couple of years later I used a heatgun to remove the bad CPU from a second 3000D. Of course you have to protect other parts of the motherboard from the heat. Tin foil does a good job. Once the old CPU is out, you plug in an external 030, 040 or 060 card and you're good to go again after setting the jumpers for external CPU.
Plaz
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Plaz wrote:
I have a similar problem with an A3000D Mobo and it turns out the CPU is dead.
FYI, I have 2 A3000's that suffered the same problem. ...
I'm sort of surprised; I've never seen a Motorola 68K fail before, and we have and still use a lot of old ones on VME boards at work.
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hardlink wrote:
I'm sort of surprised; I've never seen a Motorola 68K fail before, and we have and still use a lot of old ones on VME boards at work.
My first time... I hope its the last but judging from Plaz's post, I'm not the only one who had this problem.
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These replacements chips are still available... :-)
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eslapion wrote:
These replacements chips are still available... :-)
...and I can confirm they work nicely in my A3000... ;-)
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Does anyone still program these nowadays? Looking for some, especially u202 & u203 :)
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These still available for the 3000?
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Also still looking for these.
This is what I found after a google and it seems to be exactly what I was experiencing on my 3000.
"U202/203: Chips That Overheat
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Many A3000 owners complain of strange graphics and disk errors,
like windows and gadgets being trashed. Sometimes dots and horizontal
lines will appear. This is likely due to the U202 and U203 components,
a pair of Programmable Array Logic chips (format: 16L8-10) which tend to
overheat."
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Maybe I have them in stock : I'll see tomorrow !
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That would be great ! Thanks man :)
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Every Amiga 3000 needs its U202 and U203 chips replaced! You either should have replaced them long ago or you need to replace them in the future. But sooner or later they must be replaced.
When U202 and/or U203 start overheating you get all sorts of weird sparkly graphics on the screen and some random memory corruptions. Its awful.
But it is really easy for a newb to replace these chips.
I bought my replacements from some place in Canada back in the 1990s (maybe 1994?). I wish I would have bought a whole stack of extras for other ppl to make sure we never run out. The replacement chips work great!
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Funny, I never even thought of replacing these.
Looking forward to running cooler. I assume they are just plug and play?
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Funny, I never even thought of replacing these.
Looking forward to running cooler. I assume they are just plug and play?
Did you buy ur A3000 used?
It probably already had them replaced.
Yes, you just unplug the old chip and plug in the new one. If you can plug in one of those A3000 RAM chips then you can totally replace U202, U203.
No desoldering. No soldering. No electrical engineering degree required. You don't even have to have your kid do it for you.
I never replaced a U701 or U714 but I assume they are exactly the same shape and size.
The hardest part is getting your A3000 apart and back together without slicing your hand open or yelling out any naughty words. :D
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Did you buy ur A3000 used?
It probably already had them replaced.
Yes, you just unplug the old chip and plug in the new one. If you can plug in one of those A3000 RAM chips then you can totally replace U202, U203.
No desoldering. No soldering. No electrical engineering degree required. You don't even have to have your kid do it for you.
I never replaced a U701 or U714 but I assume they are exactly the same shape and size.
The hardest part is getting your A3000 apart and back together without slicing your hand open or yelling out any naughty words. :D
I bought one of them new in the early 90's so I know that one isn't done, at least I don't remember. ;)
The other I bought from an Amiga club member from back in the day.
I do have 4 other 3k's all in the need of love, perhaps they might have them. How would I tell if I have a new gal appose to the pal?
I enjoy taking them down. It take a little patience but, I don't mind... I curse mainly from bending legs when I pull chips...
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I have them all for sale, ready to go today !
Lattice GAL16V8B 7ns
4.50 € each one + 1.60 € Priority shipping worldwide whatever the quantity
:)
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I have them all for sale, ready to go today !
Lattice GAL16V8B 7ns
4.50 € each one + 1.60 € Priority shipping worldwide whatever the quantity
:)
I'll take one of all four chips please. Could you PM me your PayPal details?
Cheers!
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PM'd Cosmo for two sets for my 2 A3000's
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Oops, he had to order chips :(
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Received from Cosmo, shipped perfectly. Great experience.
Go Cosmo!
Will install in a few weeks...