At 12:44 AM 3/10/2010, Ed Palmer wrote...
It would seem to make more sense to have the fan blowing hot air out
the back and drawing the hot inside air over the temperature sensor.
The reason to have a fan blow in is so you can put a filter on it. It
also creates more turbulence inside the
Good point about the filter, but it doesn't appear that the 5371a or
5372a ever had a filter. Unless it was just done out of habit because
other HP units did have a filter.
Ed
Mike S wrote:
At 12:44 AM 3/10/2010, Ed Palmer wrote...
It would seem to make more sense to have the fan blowing
Mike S wrote:
At 12:44 AM 3/10/2010, Ed Palmer wrote...
It would seem to make more sense to have the fan blowing hot air out
the back and drawing the hot inside air over the temperature sensor.
The reason to have a fan blow in is so you can put a filter on it. It
also creates more
Ed Palmer wrote:
Good point about the filter, but it doesn't appear that the 5371a or
5372a ever had a filter. Unless it was just done out of habit because
other HP units did have a filter.
If you want to toss a filter on it because your environment isn't
exactly clean, it is trivial. Maybe
Ed,
From your description of the fan noise, I have one concern.
If the fan speed seems to increase without a good cleaning
or change in the supply voltage, then it's likely that the airflow
has been decreased, an obvious speed up is not good news.
Pete Rawson
On Mar 9, 2010, at 10:44 PM, Ed
Are you sure that it has a variable speed fan? My 5372A has a pretty quiet
fan and I have never tried to change it. I am assuming that it uses the same
117V fan as the 5371A. That thermal switch may be a power supply shutdown.
I have a couple of 5371A's that are a different matter.
Yes, the fan is variable speed and it's 12V DC. It's described in the
motherboard section of the service manual on page 11-4 (pdf page 503).
That's why I thought it was so odd that the fan is blowing cool outside
air over the thermal sensor on the motherboard. I guess they could have
I have a question for owners of the HP 5372A (and probably 5371A) Time
Interval Analyzer.
Is the fan on the back blowing out or sucking in?
I was looking at mine to see about replacing the fan with a quieter one
and I was surprised to see that mine is sucking in. This doesn't make
sense to
