Hey Everyone
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
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
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
sadly the new cyan drum unit (dev drive) was jammed solid, so the machine dev drive coupling shattered upon installation of the unit - i'll never again forget to check that before install, as the coupling is not available separately, one has to procure the entire main drive unit at about $700.00, not to mention the 3-4 hr job to replace the thing
so, i removed the main drive gearbox & repaired the shattered coupling, but i also managed to slightly damage the uber-fine PT disk on the black drum drive - when i put it all back together, it came up with this error code C2204 - i did manage to get 5 print-count prints out of it during all my stuffing around (god only knows how), but that aside the error keeps-a-comin
could the slight damage to the PT disk cause this error (timing error)?? if not anyone got suggestions? remember, the fault did not occur before (i have arranged for a replacement main drive unit)
hopefully someone out there has seen something like this or perhaps someone knows of a relevant tech bulletin
many thanks in advance
Andy
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
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
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
sadly the new cyan drum unit (dev drive) was jammed solid, so the machine dev drive coupling shattered upon installation of the unit - i'll never again forget to check that before install, as the coupling is not available separately, one has to procure the entire main drive unit at about $700.00, not to mention the 3-4 hr job to replace the thing
so, i removed the main drive gearbox & repaired the shattered coupling, but i also managed to slightly damage the uber-fine PT disk on the black drum drive - when i put it all back together, it came up with this error code C2204 - i did manage to get 5 print-count prints out of it during all my stuffing around (god only knows how), but that aside the error keeps-a-comin
could the slight damage to the PT disk cause this error (timing error)?? if not anyone got suggestions? remember, the fault did not occur before (i have arranged for a replacement main drive unit)
hopefully someone out there has seen something like this or perhaps someone knows of a relevant tech bulletin

many thanks in advance
Andy
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