CraigWS, I will try to answer your pinout questions. I have not personally worked on the xw9400 system at all, so I know very little about its operation. So I might be wrong in my reply. It is an AMD-based system, so some functions are not the same as the other xw or Z Workstations.
- Does the CPU fan assembly have 2 fans or 1 fan? If it has 2 fans, then P70 and P71 pin 5 are probably a second fan tach. Or it might be a fan detect. I am not sure.
JP30 is a fan detect override. Putting a jumper on this 2 pin header should override any missing or failed fail errors. I am not sure it is works or even if it is still enabled (could be a prototype function only), but it does not sound like a good idea to disable it. My $0.02.
The pinouts are:
P70 is a 5 pin header for CPU0. P71 is a 5 pin header for CPU1. The pinouts are identical:
Pin 1: GND
Pin 2: +12V
Pin 3: CPU fan tach (speed)
Pin 4: PWM (to control fan speed)
Pin 5: A second fan detect? Does the xw9400 have 2 fans in the heatsink assembly?
P8 is a pin header for chassis fan. P91 is a 4 pin memory fan. P92 is a 4 pin PCI front fan. P93 is a 4 pin PCI rear fan. the pinouts are identical:
Pin 1: GND
Pin 2: +12V
Pin 3: Fan tach (speed)
Pin 4: PWM (to control fan speed)