6. Fan motor control circuit
This circuit controls the fan motor on the instruction from the CPU.
The circuit is illustrated below.
Figure 2-2-6
The fan motor is a DC brushless motor with a built-in Hall device. This motor is unified with
the motor drive circuit.
To rotate the fan motor, the CPU turns ON the pick-up solenoid and simultaneously sets the
No.23 pin “H”. When the main motor stops at print completion, the CPU rotates the fan motor
for about 30 seconds and then sets the pin “L” to stop the fan motor.
The CPU determines a fan motor failure and notifies it to the interface controller under the
following conditions:
1) The FAN LOCK DETECTION (FLOCK) signal is not set "L" within about 10 seconds after the
start of fan motor rotation.
2) The FAN LOCK DETECTION (FLOCK) signal is set "H" continuously for 10 seconds during
fan motor rotation.
CHAPTER 2
2 - 16
J203-1
CPU
IC201
+24V
23
24
FANON
FLOCK
FM1
+3.3V
J203-2
J203-3
P04
P05
Fan motor drive circuit
Engine Controller PCB
Air intake fan
Summary of Contents for LASER SHOT LBP-1210
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