HP laserjet m712 Guide De Dépannage

The DC controller determines if the motor has failed and notifies the formatter when the motor

encounters the following conditions:

●

Startup failure — The motor does not reach a specified rotational count within a specified time

from when the motor starts.

●

Rotational failure — The rotational speed of the motor is not in the specified range for a specified

time after the motor reaches a specified speed.

The DC controller notifies the formatter of a BD (beam detect) failure when it detects a rotational failure

of the scanner motor.

The DC controller monitors the related part condition of the following motors to determine a motor

failure:

●

Upper cassette lifter motor

●

Lower cassette lifter motor

The product has three fans for preventing the temperature from rising in the product and cooling down

the delivered paper.

8

Chapter 1   Theory of operation

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