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m_emelchenkov

Apple Network Server (ANS) 700/200 repair

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Hi! I've got Apple Network Server (ANS) 700/200 and, unfortunately, it does not power on. I re-seat everything I can, checked everything visually and so on. Power Supply is in bad condition—mold and rust. I want to test it. Does anybody have a schematics for this unit? Ideally, if you have instructions what pins to short to start Power Supply separately from the computer, and what pins to measure then. While I only made multimeter measure of a fuse inside—it's working. But I don't disassemble it yet — you know, it is made non-maintainable, anyway, need to bend its body to open it.

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Make sure all the doors are shut - and if I remember correctly, the back at least has to be locked with the key or the machine won't turn on.

 

There might be other interlocks as well; it's been a while since I've had one apart...

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Yes, you remember correct — the rear lock should be closed + bottom rear switch must be pressed by chassis. Unfortunately, it seems the problem is in the power unit. While I disassembled it and now cleaning, too much dirt inside.

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Yes that machine has a few interlocks if I recall correctly. Many of which appear to be a power supply issue when in fact it’s just not closed or locked. 

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I removed the rivets on the PSU cover and cleaned up everything inside. Сobweb, dead mosquitoes, mold and more. I've even got an electric shock from some component near two large caps inside the PSU (after turning off the power, of course). That means partially it works. Or it fully works, I don't know how to test. In ATX I can just run PSU without a computer, to check, there is a plenty of info how to do it. But there, non-standard 30 pin connector, I have no idea. Googling by model or part number does not helped. I also removed left cover from the chassis, removed cover which protects bottom board with power connectors, and measured the bottom switch—it has a circuit, it is in working state. I re-seat cables again, trying install PSU into two different bays, and nothing. By the way, I don't have any lights on: nor in PSU, nor at Motherboard.

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How does the motherboard itself look?  Is it covered in crap as well.  The ANS motherboard is based off the PowerMac 9500, I'd be looking at PSU pinouts for this machine and considering an ATX conversion inside the existing casing you have.

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The motherboard itself was very clean, even no dust. ANS is not 1-1 copy of PM9500, it is a different machine. Can you help me to find ANS pinout? PSU and Motherboard has the same 30-pin (10 pin in a row x 3) large connectors.

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Someone may have posted it, but I have not seen it.  I just checked the Hardware Developer Notes and on page 21 it states, "The Network Server 700 power interconnect system pinout is available from  Developer Support.   Meaning that back in the day, if you were a registered developer, you could contact Apple's Developer Support group and they might provide the information.

 

http://www.erik.co.uk/ans/HardwareDevNotes.pdf

 

Someone may have done so and posted it, somewhere.

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Hi @trag! It's an interesting document, I did not notice it before. I don't think this sentence is about Developer Support group, but rather Developer Support as a paid option for selected customers. Why selected? Because power pinouts is useful only for hardware developers who want to make some device installed instead second power supply or something like this? I have no idea who can need power interconnect pinout except service men, but Apple does not allow servicing for 3rd parties so... I think this document exists only somewhere in archives of Apple, not in public. 

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Guys, owners of ANS 700! Please tell, if your PSU led is on when the power cord is inserted in the machine. Or it become "on" only after pressing "Power" button?

 

And a second question: could you remove PSU from the case and insert power cable directly to it? Will LED be "on" or not in this case?

Edited by m_emelchenkov

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Hi,

 

Sorry I've not been close by my ANS 500/700 of late to check this, @AlpineRaven I also need to check it for you :)  Will do so on weekend.  It's like dragging the fridge out of it's cavity and I don't want to go there too often :)

Edited by Byrd

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@m_emelchenkov 

 

I finally dragged out my ANS and answering some PSU questions ...

 

- No LED on the PSU itself

- No LEDs on when the system is powered down, connected to mains power

- Large bright green LED on the motherboard (looking inside the left hand grille) turns off when it boots to Open Firmware

- Two smaller green LEDs on the rear of the motherboard, and just below the AAUI port stay lit at all times (blinks with activity)

 

I want to try booting Mac OS on mine along with installing AIX.  I've a parts 9500 but think I'll need a 9500 ROM unless I can get around Open Firmware.

 

JB

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This ANS is badged as a 500/132, but has the 700/200 CPU board installed - and a single ANS 500 PSU.  There is no PSU LED behind the grill on the bottom panel

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@ByrdIt seems these PSUs are very different inside. I disassembled mine and can say there is a LED and I even powered it using multimeter, it have green color.

 

If anybody has ANS 700 chassis and can test the LED on PSU, please write here. I really need to know it before going to tech. guys to trying to repair it. Lack of schematics makes this undertaking not easy.

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Hope you find what you need.  I'm guessing an ATX conversion using a 1U PSU isn't out of the question if you can find the right pinout?

 

It's been a while since I've tried out my ANS.  Certainly it doesn't boot AIX and I'll try that next as think the stock 9GB drive installed was flaky.  The little plastic tabs on the drive sleds are very fragile; tonight I lubricated them with silicone grease to avoid snapping when pushing them down.

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On 8/26/2019 at 7:42 AM, Byrd said:

I want to try booting Mac OS on mine along with installing AIX.  I've a parts 9500 but think I'll need a 9500 ROM unless I can get around Open Firmware.

 

JB

 

A 9500 ROM will not be sufficient.   True, they both use the same chipset and architecture.     However, interrupts on both are collected at the Grand Central chip.   They are physically wired differently on the ANS from how they're wired on the 9500.   The ROM needs to reflect that these interrupts are associated with different devices on the ANS from the ones they service on the 9500.    There's a nice table comparing the interrupt configurations in the ANS developer notes that I referenced earlier.

 

It would also be nice to add native drivers for the ANS SCSI chips...

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On 8/27/2019 at 12:12 PM, Byrd said:

Hope you find what you need.  I'm guessing an ATX conversion using a 1U PSU isn't out of the question if you can find the right pinout?

Thank you for these wishes! You are right, I can't install any other PSU because don't know its pinout.

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7 hours ago, trag said:

 

A 9500 ROM will not be sufficient.   True, they both use the same chipset and architecture.     However, interrupts on both are collected at the Grand Central chip.   They are physically wired differently on the ANS from how they're wired on the 9500.   The ROM needs to reflect that these interrupts are associated with different devices on the ANS from the ones they service on the 9500.    There's a nice table comparing the interrupt configurations in the ANS developer notes that I referenced earlier.

 

It would also be nice to add native drivers for the ANS SCSI chips...

I see - certainly there isn't much information online about the 9500 ROM on the ANS apart from that it "may" boot OS 7.x and you need a PCI SCSI card to get any further from here.

 

I'll fluff around with it a bit more however will likely install AIX and trial a mini home AppleShare network on it.

 

JB

 

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16 hours ago, Byrd said:

I see - certainly there isn't much information online about the 9500 ROM on the ANS apart from that it "may" boot OS 7.x and you need a PCI SCSI card to get any further from here.

 

I'll fluff around with it a bit more however will likely install AIX and trial a mini home AppleShare network on it.

 

JB

 

 

Back when there was a fairly convincing rumor that there was a ROM that would let the ANS boot into the Mac OS.   Whether that ROM actually existed and whether it ever escaped Apple are interesting questions.

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I up this topic.

Quote

If anybody has ANS 700 chassis and can test the LED on PSU, please write here.

We are, ANS 700 owners, the last preservers of these beautiful machines, so let's preserve the most knowledge about them, and as much working samples as we can. If you do not have ANS 700 but have a friend who has—please, tell him about this topic. I really want to bring this machine to life.

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