This is the Power On Sequence
Power-on sequence
The power-on sequence is for the purpose of the printer initialization and checking for possible malfunctions.
The following is the sequence from when the printer is turned on until it enters STBY mode.
Main motor failure detection
The CPU determines the main motor failure, stops the printer, and notifies the formatter of error
status, when it encounters the following conditions.
The interval of the MAIN MOTOR SPEED DETECTION signal (/MAINMFG) does not become the specified interval after 1000 ms of the main motor drive start.
Fan motor failure detection
The CPU determines the fan motor failure and notifies the formatter when it encounters the following
condition.
The FAN LOCK signal (FANLCK) is “H” for approximately 10 seconds and longer during fan motor
rotation.
Your description makes it sound as though the printer has a main CPU failure as all other faults should display an error or error code. In the light of this it seems that the printer will need to be looked at by a service engineer asap.
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