Question about Xerox Phaser 4500 Printer
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Posted on Jan 02, 2017
SOURCE: u4 fuser error for Xerox
Major causes of a U4 error include the following:
? Warm-up failure - Fuser warm-up not complete within 110 seconds after
? Cool-down error - Cool-down process not complete within 200 seconds.
? Low trouble temperature - The fuser temperature drops to the low trouble
temperature (approximately current control temperature, minus
approximately 25° C).
? High trouble temperature - The fuser temperature rises to the high trouble
temperature (approximately current control temperature, plus
approximately 35° C).
? STS circuit open
? STS failure - The heat rod remains on for at least 10 seconds after warmup
You have to replace the thermistor in the fuser unit.
Posted on Oct 13, 2010
SOURCE: Xerox Phaser 4500 printer has
From the Xerox Phaser 4500 Service Manual (here), the main problems could be one of:
It could be that your fuser needs to be replaced, but as you can see that code relates to a couple of problems, so even replacing the Fuser might not fix the problem.
If it doesn't even do the warm up checks it is likely to be the fuser because the other components such as STS failure and cooldown won't have had a chance to run..
Posted on May 04, 2011
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