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Power supply replacement Ultra 4
I've had a Ultra 4 stored unused for the last few years. When connecting it to power today, the power supply died violently( blowing my 16A circuit breaker for the room). I took the power supply ...
If it's just to migrate the data, I recommend you buy an ATX power extender and just clip the -5V and -12V lines. Or, if the supply is "expendable", just clip the wires directly. Your unit will probably run fine on a standard ATX supply without the extra +12V long enough for you to extract the data. Of course, you may have already killed the -5V and -12V on that supply by mating them with +12V in the NAS.
If it's just to migrate the data, I recommend you buy an ATX power extender and just clip the -5V and -12V lines. Or, if the supply is "expendable", just clip the wires directly. Your unit will probably run fine on a standard ATX supply without the extra +12V long enough for you to extract the data. Of course, you may have already killed the -5V and -12V on that supply by mating them with +12V in the NAS.
Hi, thanks for the advice, I have an atx extender cable on order, so will modify that when it arrives and power up again..
I guess I'll have to see what happened to my power supply, it doesn't have any -5V as pin 18 is unused on newer ATX power supplies, so it's the -12V that may be the issue.
The important bit is that my Ultra 4 mainboard should be ok?, even though I connected the ATX supply before I knew the wiring was modified..
I see the comment above about FSP120-40LE, the original power suplly on my Ultra 4 is an FSP060-40LE, 60W, but the wiring does indeed match the pinout with regards to colours..
How that affected your motherboard depends on the archetecture of the supply. -12V typically has very limited current capability, and dead shorting it to +12V likely would crowbar it (shut it down), and thus no damage would result to the motherboard. If there is no crowbar circuit, then the -12V would probably burn out, again with no significant impact to your system since it has such limited current capacity compared to the +12V.
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