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#1
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HP 5L fuser resistance
What should the resistance of the fixing heater be? This one measures about
34 ohms. Chris |
#2
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"Chris" wrote in
hlink.net: What should the resistance of the fixing heater be? This one measures about 34 ohms. Chris Hi Chris, The resistance should be 30 +/- 10 ohms. So 34 ohms sounds fine. HTH, -- Gert van den Heuvel webmaster www.HobbyElectronics.info |
#3
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Thanks. The top and bottom lights come on when the button is pushed. I also
watched the voltage to the heater. It's only on for a second or so but it looks to be around 100V. If the heater is good and getting power, is the temp sensor at fault? Chris "Gert van den Heuvel" wrote in message . 6.83... "Chris" wrote in hlink.net: What should the resistance of the fixing heater be? This one measures about 34 ohms. Chris Hi Chris, The resistance should be 30 +/- 10 ohms. So 34 ohms sounds fine. HTH, -- Gert van den Heuvel webmaster www.HobbyElectronics.info |
#4
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"Chris" wrote in
link.net: Thanks. The top and bottom lights come on when the button is pushed. I also watched the voltage to the heater. It's only on for a second or so but it looks to be around 100V. If the heater is good and getting power, is the temp sensor at fault? Chris Yes, it's very well possible that the sensor is defective. Top and bottom lights means a fuser error. We already know that the heater is OK, so remove the thermistor (temperature feedback) connector and measure the resistance between pins 1 and 2. Normal resistance is 440K ohms +/- 30K at 20 degrees C. -- Gert van den Heuvel webmaster www.HobbyElectronics.info |
#5
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I found a fuser from a Canon CFX-L3500 fax and it works. I think the part
numbers are different but are the specs similar? Chris "Gert van den Heuvel" wrote in message . 6.84... "Chris" wrote in link.net: Thanks. The top and bottom lights come on when the button is pushed. I also watched the voltage to the heater. It's only on for a second or so but it looks to be around 100V. If the heater is good and getting power, is the temp sensor at fault? Chris Yes, it's very well possible that the sensor is defective. Top and bottom lights means a fuser error. We already know that the heater is OK, so remove the thermistor (temperature feedback) connector and measure the resistance between pins 1 and 2. Normal resistance is 440K ohms +/- 30K at 20 degrees C. -- Gert van den Heuvel webmaster www.HobbyElectronics.info |
#6
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"Chris" wrote in
ink.net: I found a fuser from a Canon CFX-L3500 fax and it works. I think the part numbers are different but are the specs similar? Chris Yes, it's very well possible that the sensor is defective. Top and bottom lights means a fuser error. We already know that the heater is OK, so remove the thermistor (temperature feedback) connector and measure the resistance between pins 1 and 2. Normal resistance is 440K ohms +/- 30K at 20 degrees C. -- Gert van den Heuvel webmaster www.HobbyElectronics.info I dunno. I don't have the specs for that fax. But you could measure the resistance of the heater and the thermistor and check if those are within the specs of your HP. -- Gert van den Heuvel webmaster www.HobbyElectronics.info |
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