Rebuilding an Apple Network Server ANS 500

Big Ben

Well-known member
Hello there,

This a story of one of those computer you never though you will ever see for real. Then you got one.
I'd like to start with a warm thank you to @zefrenchtoon who put me in touch with the seller of that big lot of macs in France, and of course, many thanks to the seller who was absolutely nice. Big thanks to @jajan547, without his help to find an ANS ROM, this work wouldn't be possible!
So here we are I'm in my car with an ANS 500/132 travelling back to home, so much question in my head, how I gonna find an OS for this, this, how I'm going to find a ROM. And how I'm going to find proper memory? By the way... How I'm supposed to plug and hard drive in this thing... Will it ever work?

The ANS wasn't in a great condition, it was dirty, missing half of the disk carriers, had some corrosion, is missing all RAM, ROM and cache sticks. But I knew it was worth trying to get it back to life.

The ROM problem was quickly out of the equation thanks to @jajan547 and it allowed me to grab a backplate for a disk carrier in order to install a SCSI narrow drive.

But before thinking about powering up the ANS, some deep cleaning and inspection was mandatory.

Let's start shall we? I've already removed both fans and drive carriers, ready to disassemble the whole thing.
Before front small.jpegBefore top small.jpgBefore back small.jpg
From the outside, it just look bad, the server is quite dirty and dusty, sometime rusty.

The inside is a bit better tho.
Before inside small.jpgBefore inside 2 small.jpg

Hopefully the motherboard is perfectly fine despite a minor damage on the cache slot (broken anchor)
Before motherboard small.jpg

After a challenging battle I managed to remove the front panel, because I didn't have the key of the lock and the machine was not in service mode the whole assembly was locked. Fortunately there was a little gap that allowed me to unscrew the bottom support and loosen the front panel assembly.

Before front inside small.jpg

After removing the plastic part I started removing the bottom by unplugging the power outlet and sliding out the power supply, last step was the separate the bottom from the metal cage.

Stay tuned for part 2, coming soon! :D
 

Byrd

Well-known member
Nice pick up, and it should come up well. Those ANS internals are well protected from the elements, I've a 500/200 which recently all the foam turned into dust now removed but should replace eventually.
 

zefrenchtoon

Well-known member
Hello there,

This a story of one of those computer you never though you will ever see for real. Then you got one.
I'd like to start with a warm thank you to @zefrenchtoon who put me in touch with the seller of that big lot of macs in France, and of course, many thanks to the seller who was absolutely nice. Big thanks to @jajan547, without his help to find an ANS ROM, this work wouldn't be possible!
So here we are I'm in my car with an ANS 500/132 travelling back to home, so much question in my head, how I gonna find an OS for this, this, how I'm going to find a ROM. And how I'm going to find proper memory? By the way... How I'm supposed to plug and hard drive in this thing... Will it ever work?

The ANS wasn't in a great condition, it was dirty, missing half of the disk carriers, had some corrosion, is missing all RAM, ROM and cache sticks. But I knew it was worth trying to get it back to life.

The ROM problem was quickly out of the equation thanks to @jajan547 and it allowed me to grab a backplate for a disk carrier in order to install a SCSI narrow drive.

But before thinking about powering up the ANS, some deep cleaning and inspection was mandatory.

Let's start shall we? I've already removed both fans and drive carriers, ready to disassemble the whole thing.
View attachment 73791View attachment 73792View attachment 73793
From the outside, it just look bad, the server is quite dirty and dusty, sometime rusty.

The inside is a bit better tho.
View attachment 73795View attachment 73794

Hopefully the motherboard is perfectly fine despite a minor damage on the cache slot (broken anchor)
View attachment 73800

After a challenging battle I managed to remove the front panel, because I didn't have the key of the lock and the machine was not in service mode the whole assembly was locked. Fortunately there was a little gap that allowed me to unscrew the bottom support and loosen the front panel assembly.

View attachment 73801

After removing the plastic part I started removing the bottom by unplugging the power outlet and sliding out the power supply, last step was the separate the bottom from the metal cage.

Stay tuned for part 2, coming soon! :D
I'm happy to read you !!
I told him that if I had enough place, I would get more than the little LC I bought him (containing an Apple IIe Card)
 

Big Ben

Well-known member
Time for part 2!

I didn’t prepare the photos for this part, as I was eager to progress on the ANS before posting this second part so I would be able to tell you about an epic rebuild and finish with a: « It’s alive! ».

Unfortunately, well it’s not. At least not anymore at the moment. Let me explain...

So I did clean every part, and reassemble the whole server and did manage to find some RAM in my stock.

As mentioned by @Byrd the foam just fall appart when I tried to clean it. Looking at the rust, it became clear that the foam did absorb some humidity and ruined the asthetics of the machine. Thanksfully nothing too serious.

Moving on to prepare a test…
The ANS can use 168-pin 5V buffered RAM, same as an 9500.
Despite the server designed to use parity RAM it works fine without, just a bit slower.
Which will be fine at first.

With the ROM and 16Mb of RAM I had around: it did actually boot!
IMG_4813.jpeg

I did also manage to find more RAM up to 80Mb and a potentialy AIX compatible NIC!

Time to prepare everything to install AIX.

Meanwhile I was also digging in my stuff to find an L2 cache, turns out I didn’t have a single one compatible but I managed to find four 32Mb sticks, for a confortable 196Mb of RAM with the other sticks. Lucky find!

But luck doesn’t last and soon after I installed the new RAM the ANS refused to power on.

No 5V Trck, nothing on the power on rail.

What a set back.
I did check the fuse, but it’s fine. That would have been too easy.

So I know this ANS can work, but the power supply decided to ruin the party.

Well. I just hope there will be a part 3 :(
 

cheesestraws

Well-known member
Well, of all the things to fail, the PSU is one of the least depressing: if worst comes to worst there's alll kinds of ways you can lash up power temporarily to work :).
 

Big Ben

Well-known member
Well, of all the things to fail, the PSU is one of the least depressing: if worst comes to worst there's alll kinds of ways you can lash up power temporarily to work :).
True, true,… just me hating messing with thoses as I know almost nothing about electronics. And replacing a dead PSU with a modern one bugs me, it’s kinda stupid I can’t tell why. 😅

@dramirez Oooooh thanks for share this video, this seems to be exactly the problem I have. I’m currently openning the PSU to check!
 

Big Ben

Well-known member
It has been a while now but hey, time for an update.

And good one. Thanks to tecknight‘s video a was able to fix the PSU.

Mine shared the described problem, slowly becoming harder to power on until it died. Well it took only 4/5 attemps before it died, but this little guy had a rought life.

So I replaced the TOP200 with an TOP222 just to be sure since it was cheap and I had to start somewhere.

Long story short (shorted like this TOP200 haha), the PSU stayed dead, I did loose motivation at this point, removing the PSU from the ANS 500, despite not hard, is a pain. It stayed dead until this saturday.

I decided to tackle down this issue for good. After desoldering the small daugther board I decided to test few components despite everything looking good.

1733748834973.png
See? Looks fine!

But the R50 was just dead, the old TOP200 probably took it when it died.
1733748885369.png
It just had to be under the resistor so I wasn’t able to see it.

And replacing the resistor did the trick!

1733749058470.jpeg
Et voilà, an another ANS 500 running again!

AIX installed, now I need to find the missing tray, cdrom drive, proper RAM and L2 cache!

Some photos/screenshots to come!
 
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