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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Energy on July 21, 2010, 08:03:00 AM

Title: What is this?
Post by: Energy on July 21, 2010, 08:03:00 AM

I have been digging around in my stock of Amiga stuff. I found a amiga 500 with something in the trapdoor and i am wondering what it is.

There is a flicker located on a side of the amiga to turn it on/off but seems to be broke

http://www.vsunion.com/Billede0011.jpg

If anyone know what it is, can it be turn on by the jumpers instead? :)

Title: Re: What is this?
Post by: amigadave on July 21, 2010, 08:41:05 AM

Quote from: Energy;571299

I have been digging around in my stock of Amiga stuff. I found a amiga 500 with something in the trapdoor and i am wondering what it is.

There is a flicker located on a side of the amiga to turn it on/off but seems to be broke

http://www.vsunion.com/Billede0011.jpg

If anyone know what it is, can it be turn on by the jumpers instead? :)

Looks like a RAM expansion with a clock battery and the switched jumper might be one of two things.  1) RAM expansion enable/disable switch, or 2) RAM config to make the added RAM Chip, or Fast RAM.

Those are my 2 guesses.

Title: Re: What is this?
Post by: Energy on July 21, 2010, 08:48:21 AM

So there should be a way to turn it on with those 2 jumpers maybe? i could test that with launching workbench right and checking if there is more Chip or fast ram in it?

Title: Re: What is this?
Post by: amigadave on July 21, 2010, 09:00:57 AM

Quote from: Energy;571303

So there should be a way to turn it on with those 2 jumpers maybe? i could test that with launching workbench right and checking if there is more Chip or fast ram in it?

Yes, but to be safe I would only change the switch, or jumper if switch wiring is removed, when the Amiga is off.

Title: Re: What is this?
Post by: Energy on July 21, 2010, 09:08:40 AM

I know i don't know what it is. But lets us say its to turn more RAM on and off, and i want fix the flicker with a new one.

I from denmark and have found this one
http://ecolight.dk/catalog/mini-vippekontakt-p-38.html
But how can i sure that it work with it and its the right AMP/VOLT to the device? :)

Title: Re: What is this?
Post by: mbueler on July 21, 2010, 09:16:49 AM

It`s a Vector 512kB A500i and that Battery dosent look too healthy.

http://amiga.resource.cx/exp/vector505

Title: Re: What is this?
Post by: Energy on July 21, 2010, 09:20:30 AM

Its there a place you can get a new battery then or does that device work without battery so i can just remove it, before it does damage to the ram? isnt it just installed because it can remember time then in workbench?

Title: Re: What is this?
Post by: Energy on July 21, 2010, 10:17:49 AM

Quote from: mbueler;571308

It`s a Vector 512kB A500i and that Battery dosent look too healthy.

http://amiga.resource.cx/exp/vector505

Thx, i saw that 2. Is there a way to replace it or is it needed? shouldn't the RAM work anyway? The battery is only for the clock right?

Title: Re: What is this?
Post by: spud on July 21, 2010, 10:56:02 AM

The battery is probably only for the clock, yes, but If that battery has leaked over the tracks and stuff on that circuit board then it has probably knackered the whole thing. :(

Title: Re: What is this?
Post by: Energy on July 21, 2010, 11:26:51 AM

Quote from: spud;571317

The battery is probably only for the clock, yes, but If that battery has leaked over the tracks and stuff on that circuit board then it has probably knackered the whole thing. :(

But if its only on the battery, is there a guide somewhere how to remove this battery :)? or maybe a place where you can replace it then?

Title: Re: What is this?
Post by: Amiga_Nut on July 21, 2010, 12:23:36 PM

Just cut the battery terminals for now. And just get a new switch for a dollar, there's only two wires anyway so it's no big deal to just swap out the switch.

Title: Re: What is this?
Post by: Energy on July 21, 2010, 12:59:11 PM

Quote from: Amiga_Nut;571325

Just cut the battery terminals for now. And just get a new switch for a dollar, there's only two wires anyway so it's no big deal to just swap out the switch.

kk thx for the help :) I hope it works.

Title: Re: What is this?
Post by: Energy on July 22, 2010, 07:28:31 AM

I have removed the battery and it gives me a green booting screen when it bootup. And that means a CHIP Ram fail. Is there any solution to trying fix these rams on this board?