Amiga 4000 revD?

[tonyvdb]

so I managed to get my hands on a virtually new A4000d with a revision D motherboard (with coin cell battery).
It was sitting in storage for years and the case is still white, no yellowing at all.
My question is other than the battery being a coin and the chip ram soldered directly to the motherboard are there any other differences?

[Oldsmobile_Mike]

If it is the CR version, a 68EC030 soldered to the motherboard?

I assume you saw this already:  http://amiga.resource.cx/mod/a4000.html

[tonyvdb]

Yes, I did read that and it answered some of my questions. And yes the one I have is the CR version. I'm assuming I can still place a 3640 in it?

[Matt_H]

Yes, although you may need to adjust some jumpers. I think the rev D 4000's that shipped with 040s actually omitted the 030 from the motherboard. Commodore did the same on the 3000T-040.

[danbeaver]

The CR model has pins for an external battery, like the A4000T...

[AmiDude]

Some A4000D motherboards had 68030 CPU directly soldered on board,
others didn't.

[Brian]

The RevD board with 030 CPU installed is by far the best A4000 motherboard, congrats.

[tonyvdb]

Thanks everyone. Commodore really could not make up there minds, there seems to be many revisions of the board even within the same series LOL I also found out it has the 3640 installed already.
Looking forward to getting everything going

[Brian]

Cross your fingers that the board still have the 030 onboard, if it's missing you're also likely to be missing the 50Mhz oscillator at U104 (the motherboard takes this signal from the 3640 CPU card). The result is that it won't work with asynchronous CPU boards since you won't get the correct clock when changing J100/J104 to INT... might just be to add this oscillator to the motherboard however since it's low cost there isn't a socket for it so you have to get out your soldering tools.

[tonyvdb]

Hmm, ok that's interesting. I will see once I receive it and report back

[spaceman88]

I had one of these ( it was a "Video Toaster" model), no 68030 on board, had an A3640 with the capacitors actually installed correctly. It had a black screen when I got it, so I sent it off to Anthony Hoffman in NZ, but he was unable to fix it.

[danbeaver]

I had one of these ( it was a "Video Toaster" model), no 68030 on board, had an A3640 with the capacitors actually installed correctly. It had a black screen when I got it, so I sent it off to Anthony Hoffman in NZ, but he was unable to fix it.

Odd you should add this post; I bought a CR version like the one above from someone I really trust who told me at least twice what a sweet motherboard it was.  I waited a month to get it tested and it is quite dead.  I am now waiting for Anthony to get back from the deep south in October to see what is wrong.

[spaceman88]

Odd you should add this post; I bought a CR version like the one above from someone I really trust who told me at least twice what a sweet motherboard it was.  I waited a month to get it tested and it is quite dead.  I am now waiting for Anthony to get back from the deep south in October to see what is wrong.

I found out later that the power supply was also bad in this system and wondered if it may have fried the board. I'm not sure what kind of over voltage protection those power supplies had. I also sent Anthony a "regular" 4000 board (bad caps, battery damage) at the same time, that he was able to fix.

[danbeaver]

I found out later that the power supply was also bad in this system and wondered if it may have fried the board. I'm not sure what kind of over voltage protection those power supplies had. I also sent Anthony a "regular" 4000 board (bad caps, battery damage) at the same time, that he was able to fix.

I have used him for around five Amiga motherboards and a couple of A3640's; I am waiting to send him two more motherboards and 2 A3640's.  His technical reports are insanely detailed, you gotta love them!

[tonyvdb]

So, got the A4000 and took a couple pictures. Any thoughts?

A4000 case
http://www.amiga.org/gallery/images/3551/3_image.jpg

Inside, revD motherboard
I removed the A3640 for a better view.
http://www.amiga.org/gallery/images/3551/4_image.jpg

It was mentioned that some revD motherboards shipped without the 50mhz oscillator, where is it located and can someone see on the above photo if it's there?