[Info-vax] DS10 fan replacements

[John H. Reinhardt]

On 12/7/2018 3:14 PM, jrbrady65 at gmail.com wrote:
> On Thursday, December 6, 2018 at 10:01:37 PM UTC-8, John H. Reinhardt wrote:
> 
>> Does anyone know how the monitor determines if the fans are good?  Both case fans are 2-wire so no PWM type monitoring possible.  The CPU fan is a 3-wire - it turns when the power comes on but still registers and "failing" and then the system powers off after 30 second.
>>
> 
> Hello John,
> 
> Recently did exactly as you describe. We may have purchased a DS10 from the same seller!
> 
> Anyway, I was able to use the following fans purchased from Jameco Electronics and the system runs quite cool and happily with them:
> 
> CPU - 80x80x25 - 12V, 3 Wire - Sunon EE80251B3-0000-G99
> Case - 80X80X25 - 12v, 2 Wire - Sunon EE80251B1-0000-A99
> 
> CPU fan runs about 2400 RPM and meets the tach requirement.
> 
> I also spaced the CPU fan slightly above the heat sink with a few washers to increase air flow and reduce drag on the fan speed. Purchased longer machine bolts to accommodate the spacing, fan guard and lock washer.
> 
> Watch the order of the wires - looking down from the top, with case facing forward, the order is Black/Red/Yellow on my DS10 617 MHz motherboard. I used a three-wire connector from a PC but had to solder the fan wires in the correct order for the DS10.
> 
> I plan to replace the CPU fan with a Delta AFB8012SH 12V, 3 Wire, 4000 RPM to see if the system runs even cooler and the higher RPM is acceptable.
> 
> Hope this helps? Have fun and good luck!
> 
> Regards,
> Jason
> 

Hi Jason,

Thanks for that information. I placed an order and I'll see how it goes. It's interesting that on mine, the CPU fan wires work when it's Red-Yellow-Black, left to right, with the front of the case facing forward.  But mine is a 466MHz motherboard.  Seems like it should be the same, but who knows.  I got the order from looking at DS10 motherboard pictures online.  Originally the fan had Red-Black-Yellow (or Black-Red-Yellow I can't remember) but I switched them around and the Red-Yellow-Black was the only order that made the fan turn at a normal speed or at all.

-- 
John H. Reinhardt