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Proud new WGS 9150 owner.

Nice. I have a later production Quadra 950 that has a case with the opening where the floppy bracket for the 9150 would go. Nice machine. Worth holding on to!
 
Since you showed us yours, I'll show you mine... I've probably shared this pic on here before
 

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Nice. All it needs next to is the q700.
I need to move one out to make room for 9150.
 

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Nice score. I love the 9150. They did a great job with the front panel and really kept the 6100 style aesthetics. I know they just reused all the Quadra cases, but the 9150 is the only one that really fit for the towers. 8100 was just too ... wavy.

I wonder if Apple ever had plans for a regular 9100 workstation variant? Maybe there's a hidden declROM for that model.
 
I am the new owner of this bad boy. This seems to be the 80mhz model that was upgraded to 120. I know these are hard to come by but has anyone seen one like this? The badge is not even aligned.
It is loaded with AsanteFast Ethernet 10/100, ATTO siliconexpress IV scsi card, Radius 24-bit graphics I/F. G3 card is installed on the pds slot.

The board looks clean overall, but I noticed a burnt-looking patch around the component just above the ROM slot. I don’t see the same discoloration anywhere else, so I’m wondering if it’s heat related or just residue from age or previous work. Small visual clues like that are easy to ignore until they point to something real. I’m the same with sites like Tropical Casino https://tropical-casino.com/ where I pay more attention to odd loading behaviour, a game tile that keeps failing, or a payment status that looks off than to the flashy stuff. Anyone know what that component is and whether that colour is normal?
That is a pretty interesting configuration. With the G3 card, Radius graphics, ATTO SCSI and Asante Ethernet, somebody clearly spent a lot of money upgrading that machine back in the day.


The crooked badge would make me wonder whether the 120 MHz marking was added during an upgrade rather than being factory installed that way. I would not read too much into it by itself though.


The dark area above the ROM slot is the part I would inspect more closely. If it is just discoloration in the board or old flux residue, it may be harmless, but if the component itself has been running hot you should be able to see some browning around the solder joints or on the nearby plastic.


I would take a close photo of that area, both sides of the board if possible, and identify the component before powering it for long periods. Also worth checking the electrolytic capacitors nearby for leakage, since old capacitor residue can sometimes leave staining that looks like heat damage.


If the machine is stable I would not start replacing parts blindly, but I would definitely document that area now so you can tell if the discoloration gets worse.
 
LT1085 is a linear voltage regulator, it's designed to burn off voltage difference as heat and appears to have been doing that job successfully for a long time. Maybe the 120MHz upgrade put more load on it than it would've seen at 80MHz? Short of bodging in a switching regulator to replace it (which can introduce voltage ripple, potentially causing different problems), there's not much you can do except put a heatsink on it to help it radiate more of its heat into the air and conduct less into the board.
 
No 9150 here, but I have my 900, 950, 700, prototype 700, and G3 on the same shelf.

Though in order the prototype (EVT) 700 should probably be before the 700.

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LT1085 is a linear voltage regulator, it's designed to burn off voltage difference as heat and appears to have been doing that job successfully for a long time. Maybe the 120MHz upgrade put more load on it than it would've seen at 80MHz? Short of bodging in a switching regulator to replace it (which can introduce voltage ripple, potentially causing different problems), there's not much you can do except put a heatsink on it to help it radiate more of its heat into the air and conduct less into the board.
Thank you for detailed explanation. I will add heat sink on it.
 
That is a pretty interesting configuration. With the G3 card, Radius graphics, ATTO SCSI and Asante Ethernet, somebody clearly spent a lot of money upgrading that machine back in the day.


The crooked badge would make me wonder whether the 120 MHz marking was added during an upgrade rather than being factory installed that way. I would not read too much into it by itself though.


The dark area above the ROM slot is the part I would inspect more closely. If it is just discoloration in the board or old flux residue, it may be harmless, but if the component itself has been running hot you should be able to see some browning around the solder joints or on the nearby plastic.


I would take a close photo of that area, both sides of the board if possible, and identify the component before powering it for long periods. Also worth checking the electrolytic capacitors nearby for leakage, since old capacitor residue can sometimes leave staining that looks like heat damage.


If the machine is stable I would not start replacing parts blindly, but I would definitely document that area now so you can tell if the discoloration gets worse.
So far it is running fine so not rushing to recap just yet. I do plan to replace the thermal paste on the CPU.
 
CPU thermal paste was replaced and a heatsink was added to the component. Running with no issue so I will hold off on a recap for now.
 

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I'm not sure I would've put a heat sink on it, in case it falls off because it is vertically mounted after all, and most adhesive no matter how good it is ends up getting weaker under heat. Voltage regulators generally get pretty warm, but you'll note that the long tab on one side is soldered down because it dissipates its heat into the ground plane of the PCB. If you were super worried about heat on that, you could probably replace it with a more modern switching regulator, but it might take some research.
 
I'm not sure I would've put a heat sink on it, in case it falls off because it is vertically mounted after all, and most adhesive no matter how good it is ends up getting weaker under heat. Voltage regulators generally get pretty warm, but you'll note that the long tab on one side is soldered down because it dissipates its heat into the ground plane of the PCB. If you were super worried about heat on that, you could probably replace it with a more modern switching regulator, but it might take some research.
That’s a good point. For now I am not running it 24/7 like it was probably used before. I will have to look into further on this if i decide to run it longer.
 
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