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#1
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Need to turn off fuser HP Laserjet 4L.
For some experiments I need unfused laser images.
I have an HP Laserjet 4L that I could use if I could turn off the fuser and still have the rest of it work. Can I shunt a thermistor and make this happen? Schematics available? Thanks, mike -- Return address is VALID. 500MHz Tek DSOscilloscope TDS540 $2200 http://nm7u.tripod.com/homepage/te.html Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121 Bunch of stuff For Sale and Wanted at the link below. http://www.geocities.com/SiliconValley/Monitor/4710/ |
#2
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Mike,
I really dont think that could work because if you turn off the thermistor or whatever a fault will alert the printer logic board that the fuser is going to either over heat causing a fire, or will not heat at all and will give you a 50 error which is a fuser related error, good thinking though! Martin |
#3
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In article , mike
writes For some experiments I need unfused laser images. I have an HP Laserjet 4L that I could use if I could turn off the fuser and still have the rest of it work. Can you power off the printer before the page gets to the fuser and at least recover a partial unfused image? -- Tim Puffett |
#4
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No , this cannot happen, because when the paper is being fed into the
fuser the other half of the page i still going through the toner cartridge. Martin |
#5
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In article , Martin
writes No , this cannot happen, because when the paper is being fed into the fuser the other half of the page i still going through the toner cartridge. It does depend on the model of printer and also how much of an image you want / need to see. Obviously you aint gonna get a complete unfused page by this method. Simply trying to trick the printer into completing a cycle without any heat in the fuser is still likely to mess up the toner image on the page as it a) passes through the (cold) fuser rollers or b) as it wends it's way through the output rollers etc, or c) as someone shakes it when picking it up to look at it! -- Tim Puffett |
#6
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Tim Puffett wrote:
In article , Martin writes No , this cannot happen, because when the paper is being fed into the fuser the other half of the page i still going through the toner cartridge. It does depend on the model of printer and also how much of an image you want / need to see. Obviously you aint gonna get a complete unfused page by this method. Simply trying to trick the printer into completing a cycle without any heat in the fuser is still likely to mess up the toner image on the page as it a) passes through the (cold) fuser rollers or b) as it wends it's way through the output rollers etc, or c) as someone shakes it when picking it up to look at it! Didn't get any useful info, so I just did it. Ripped out the fuser. Put a 4.7K resistor in place of the thermistor. Get about 80% of a page before it stops. Working great. mike -- Return address is VALID. 500MHz Tek DSOscilloscope TDS540 $2200 http://nm7u.tripod.com/homepage/te.html Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121 Bunch of stuff For Sale and Wanted at the link below. http://www.geocities.com/SiliconValley/Monitor/4710/ |
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