Here's the history - due to poor print quality & replace warnings, client bought 4 new (yeah, could be reman) process units from China & got me out to fit Aussie chips to them & install - the machine was working fine before i touched it aside from C/Q issues
This error code does not occur during "cleaning" (first mode after power-up & boot) unless i deliberately jam the waste toner auger in which case the error occurs within about a second - but soon as the machine goes into "stabilizing image" mode the error occurs within about a second I have the service manual & have checked everything, M20 works fine, gears rotate, little flag in waste box does its' thing, window is clear, tested sensor PS23 & swapped it with waste toner full sensor & tested that correct voltages appear at CN24PRCB pin 4 & all appears OK (switches between 3.3V & 0v when either the flag or my finger blocks the sensor), Service Mode/State Confirmation/Sensor Check does not include a test for this sensor
C2204: Waste toner agitating motor’s failure to turn
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