Apple Network Server (ANS) 700/200 repair

[m_emelchenkov]

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.

 

[ScutBoy]

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...

 

[m_emelchenkov]

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.

 

[maceffects]

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. 

 

[maceffects]

In that case rebuilding the power supply is what I would do, there may be a fuse in there. Unfortunately, I don’t have access to schematics. 

 

[m_emelchenkov]

Fuse works . Everything other component looks not fired too. Will keep updating.

 

[m_emelchenkov]

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.

 

[Byrd]

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.

 

[m_emelchenkov]

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.

 

[trag]

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.

 

[m_emelchenkov]

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. 

 

[m_emelchenkov]

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?

 

[Byrd]

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

 

[m_emelchenkov]

@Byrd Please . I will wait your info. Maybe it will help me with PSU repairing.

 

[m_emelchenkov]

Hi @Byrd! Have you found time to check it?

 

[Byrd]

@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

 

[m_emelchenkov]

@ByrdThank you! Do you have ANS 500 or ANS 700? They have different PSUs. On ANS 700 there is a led in PSU look to its front. It is inside PSU and should be visible if remove the bottom panel.

 

[Byrd]

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

 

[m_emelchenkov]

@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.