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This error 55.4k appeared in printer hp color laserjet 5550. The following trouble shooting did. Orignally my printer fault is display blank.Then i replace dc board with formatter board. blank is gone dueto new ram.Machine display showed the memory process. but immediatly the error 55.4k appeared on display.The reason for this error is, communication failure between formatter and dc board.The dc board which i was replaced by old type one.Then i found exact same dc board, replaced. Error was gone.Machine came to normal status , working fine.
(C)= developing disengaging motor rotation error / (0)= no color/black
Developing disengaging motor error 1. Reconnect the connectors J16 for the developing disengaging motor and J1100 for the DC controller PCB. 2. Replace the developing disengaging drive assembly. 3. Replace the DC controller PCB. Calibrate the printer after replacing the DC controller.
The error says that the printer has a "fuser motor startup error". Not a good error to get. Possibilities are a bad fuser motor, bad DC Controller or fuser drive assembly. If you haven't already, power cycle the printer. If the error persists, you are going to have to have a tech look at it.
the printer is sensing that one of the motors are not turning.remove the cover from the left side .you will find the main drive motor,next to the motor you will find a sensor clean this sensor with some electronic board cleaner .be sure that the sensor it dry before turning the printer on.
It is located in the back of the printer on the bottom. Remove the back
cover. With the power off, remove the formatter board by loosening the
two big screws and pulling out. Remove the plastic cover by the side of
the formatter cage. Remove the fan housing by the power connector by
removing the two screws, disconnect the cable and pull straigt out. Now
remove the big cable at the top and unwind from the high voltage ps.
Remove the white connector in the middle of the low voltage ps. Next
trace the white cable wires running from the ps to the dc controller
and remove the cable from the dc controller. Now trace the fan cable
for the fan in the front of the ps and remove it from the dc
controller. Remove all the screws which secure it to the frame and pull
straight out. Move the fan in front from the old ps to the new and
reverse instructions... Take off the large metal side cover. Look down at the bottom of the
printer. The large box is the LVPS. Remove the screws holding it and
follow the wiring up to where it plugs in and pull the connectors off.
You'll also have to remove the fan above the LVPS on the top right side
of it. You will have to take the fan mounted on the LVPS off and put it
on the replacement LVPS as they don't come with fans.