1. Auto start PSU by bridging pin33 and pin36
Some says use 330ohm, some says just bridge with wire, some says, I need to make extra circuit to make some delay.
Which one is correct answer?
2. How to adjust voltage to 10v?
Most of reference is all about increasing but not decreasing.
https://github.com/darwinbeing/HPServerPSUHack
I also looked for this diagram, and my understanding is that I need negative resistor which doesnt make sense at all.
Do I need to solder on separate point? What resister would I need to make 10V?
3. Voltage Protection?
Also referenced from above github page.
Its all about "OVP" (OverVoltage Protection) which is not really my use case as far as I know.
I think what I need to disable is "UVP" (UnderVoltage Protection) and I cannot find and good references.
Gotofbi contacted me by PM but as I can't include diagram in replies via PM, I chose to answer his questions here.
1. Enabling the PSU
My prefer method is to use a 22K resistor to simulate attachment to server, and a switch or jumper to start the PSU. Please refer to the attached image for details.
2. Reducing the output voltage.
It is simply done using a 15K resistor, solder to the two designated position in the following diagram. Or if you have very good eyes and skill and prefer to use SMD resistor instead, you can just solder a 15K smd resistor on top of the "63B" resistor, the two connection points are exactly the same. This mod drops the output voltage to around 10V and allows minor output voltage adjustment from 9.7V to 10.3V.
3. Undervoltage protection
It is unlikely the undervoltage protection will activate for an output voltage of 10V. So unless this happens, nothing needs to be done in the meantime.
4. Floating the power supply for series connection
Only one PSU needs to be modified. I shall refer you to the following Youtube video by Joshua Bardwell. However, at time 11:00 in the video, he tried to insulate the case grounding on the AC side which is totally unnecessary and maybe unsafe. Remember you only need to take care of the two standoffs at the output side only. The material you'll need are two M3 nylon screws and two nylon or insulated washers.
How To Build A 24v / 2400W Power Supply: