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Dead RN316
I have a RN316 (6 bay) that stopped working (not powering up) - it's EOL. I'd like to replace the PSU to determine if that is the reason or if it's the MB. The exiting PSU is a DPS-200PB-186A (...
Yes, the modifications to the 20-pin connector for the legacy NAS are the same as for the native OS6 ones. You should be able to confirm that based on the colors of the wires in your old one. Most of the later ones do need the 4-pin CPU power connector, so that supply won't work with those since it lacks one. But since the 316 doesn't need it, it should work fine.
The RN316 (and all ReadyNAS with a 20-pin power connector) pin-out is non-standard. The -5 and -12V pins have been replaced with +12V. For a simple driveless test to see if it'll power up, you can just pull or cut the -5V and -12V pins from the power supply cable. If that works, then splice in 12V from one of the unused connectors, like the 4-pin Molex (old style hard drive) connectors.
Sandshark wrote:The RN316 (and all ReadyNAS with a 20-pin power connector) pin-out is non-standard. The -5 and -12V pins have been replaced with +12V. For a simple driveless test to see if it'll power up, you can just pull or cut the -5V and -12V pins from the power supply cable. If that works, then splice in 12V from one of the unused connectors, like the 4-pin Molex (old style hard drive) connectors.
So on a 20 pin PSU cable, these 2 pins (highlighted below in blue), once removed should at least power up the NAS? (for anyone else reading this thread):
So, I remove those 2 pins from the new PSU and the NAS powered up fine (so the old PSU is gone).
Next, I just replace those with pins with 2x +12V wires?
The usual ATX PSU 4pin connectors have 2x +12V wires - I can use these 2 (yellow) in the (above) 20 PIN cable instead?
Or even using 2 of the PSU 4-pin (HDD) ones (yellow)?
Are these 2 +12 V pins used to power the HDD's in the RAID array?
I cannot see your pictures until a moderator approves them. But the wires in question should be white and blue, and I'll elaborate on a couple things:
You can just remove the negative voltage pins and power on the NAS without drives. The additional +12V pins are to assure that there is sufficient current available to spin up the drives, so powering up with drives and no additional power is not advisable. But powering on without drives should be enough to tell you if the power supply is the issue.
You said your new supply has a 20-pin connector. If it's actually one with a "20+4" (20 with a 4-pin add-on), then using the two +12V wires from the 4-pin section is the easiest. Just insert those pins in where you removed the negative voltages. I don't remember if the 316 needs the 4-pin CPU connection or not. If it doesn't, or if the supply has two, you can use the +12V from it. Other potential places to get it are the 4-pin Molex or SATA hard drive cables or a 6/8 pin video card connector, if it has one.
Before you do all that, there is one more thing you might try: Jumper the green power-on pin to ground while the supply is connected to the NAS. If the problem is just the power-on circuit in the NAS, then that could be all you need. You'd be unable to properly power off the NAS, but you could still use it and certainly could recover your data.
Also, did you check the +5VSB (+5 volt standby) power on the supply? That's what powers the power-on circuit.
Sandshark wrote:... I don't remember if the 316 needs the 4-pin CPU connection or not. If it doesn't, or if the supply has two, you can use the +12V from it. Other potential places to get it are the 4-pin Molex or SATA hard drive cables or a 6/8 pin video card connector, if it has one.
The 316 only has 20 pin connector for the MB, the 4 pin connector is not needed so I'll use those +12V wires for it.
The NAS powers up fine with the new PSU. I just wanted to ensure when I connect the +12V wires it doesn't blow anything up 🙂
I found this, however it does not specifically state it can be used for the RN300 / 316 series ReadyNAS:https://www.readynas.com/download/archive/pdf/ReadyNAS_PSU_pinout.pdf
Is the diagram on the right (under "ReadyNAS NV, NV+ and 1100 use modified ATX power connector") also applicable for the RN316? (based on your description, it appears to also apply to the RN316)
The PDF shows that on the 20 pin connector, PIN 12 (-12V BLUE) changes to a +12V YELLOW wire as you described, and PIN 18 (-5V WHITE) changes to a +12V YELLOW wire as you also described.Yes, the modifications to the 20-pin connector for the legacy NAS are the same as for the native OS6 ones. You should be able to confirm that based on the colors of the wires in your old one. Most of the later ones do need the 4-pin CPU power connector, so that supply won't work with those since it lacks one. But since the 316 doesn't need it, it should work fine.
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