LaserJet 5000N Fan

  • Thread starter Thread starter Steve Mackie
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Steve Mackie

I have a LaserJet 5000N that used to only turn the fan on during high output
situations, now it just runs constantly. The service menu doesn't talk about
this issue.

Anyone have any ideas?

Steve
 
Steve said:
I have a LaserJet 5000N that used to only turn the fan on during high output
situations, now it just runs constantly. The service menu doesn't talk about
this issue.

Anyone have any ideas?

Steve
Click to expand...
Maybe the fan is coming on because of too much heat. Can you remove a
cover or something and clean out the dust? Other than that, a heat
sensor may have changed calibration and need to be replaced. Or a
component such as the motor could be overheating.
 
The fan is connecter directly to power suply, I believe that fan should run
when you power up the printer.
 
Steve Mackie said:
I have a LaserJet 5000N that used to only turn the fan on during high output
situations, now it just runs constantly. The service menu doesn't talk about
this issue.

Anyone have any ideas?

Steve
Click to expand...

Steve
The fan has 3 modes.
Stopped (usually in powersave mode)
Half speed and full speed, the speed is determined by several factors mainly
whether the printer is operating at 600 or 1200 DPI.
The fan connects to the power supply but its speed is controlled by the Engine
Control Board. The symptoms you describe indicate that the Engine Control Board
has failed in a minor way. I doubt it is worthwhile fixing since the board is
going to be expensive. Your best bet may be to live with the constantly running
fan!!!
Tony
 
The fan has 3 modes.
Stopped (usually in powersave mode)
Half speed and full speed, the speed is determined by several factors mainly
whether the printer is operating at 600 or 1200 DPI.
The fan connects to the power supply but its speed is controlled by the Engine
Control Board. The symptoms you describe indicate that the Engine Control Board
has failed in a minor way. I doubt it is worthwhile fixing since the board is
going to be expensive. Your best bet may be to live with the constantly running
fan!!!
Click to expand...

I think I'll replace it though, it's really loud. Maybe it's been running at
half speed and I just couldn't hear it, but now it's on it's way out so I
can hear it.

Today I was printing a bunch of drawings and it got really loud, so the
three speed thing you are talking about makes sense.

Must just be time for a new fan.

Steve
 
Steve Mackie said:
I think I'll replace it though, it's really loud. Maybe it's been running at
half speed and I just couldn't hear it, but now it's on it's way out so I
can hear it.

Today I was printing a bunch of drawings and it got really loud, so the
three speed thing you are talking about makes sense.

Must just be time for a new fan.

Steve
Click to expand...

Ah!
The obvious that I may have overlooked. Maybe the fan (and Engine Control
Board) have indeed been operating correctly, in other words switching speeds OK
but the fan is simply getting noisier (bearing failure) do you think that is
the case? If so then replace the fan, well worth the cost for this fine printer.
Tony
 
Ah!
The obvious that I may have overlooked. Maybe the fan (and Engine Control
Board) have indeed been operating correctly, in other words switching speeds OK
but the fan is simply getting noisier (bearing failure) do you think that is
the case? If so then replace the fan, well worth the cost for this fine
Click to expand...
printer.

I'm going to try my typical "quick fix" for fans on Monday: squirt some
light oil into the bearing. This usually quits it down for a week or so
anyways, just until I get a replacement.

Steve
 
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