Olivetti d-Color MF4003 Service Manual page 685

d-Color MF4003/MF3303
[5]
[6]
[1] UFP filter
[3] Exhausted air from the machine
[5] Exhausted air from the fusing section of the main body
9.2.2 Fan control
(1) Control conditions
• The clean unit drive board drives three exhaust fans 1/2/3.
• Three exhaust fans control the rotation in a same way.
Control conditions
• When the door is open
• In sleep
• Rewriting firmware
• In standby
• In trouble
• Initial operation
• During image stabilization
• At operation check function
(when the load check)
• When printing (1-Sided / 2-
Sided)
• During IU temperature
lowering wait control
(2) Lock detection
• The clean unit drive board detects the lock status of the exhaust fans.
• Even when one of the exhaust fans in the clean unit is locked, the clean unit drive board sends a lock signal to the main body. Then a
clean unit fan's failure to turn (C5360) will appear on the operation panel.
Exhaust fan/1 (FM1)
Rotation
Lock status
Rotation
Rotation
Y119930-3
[4]
[1]
Exhaust fan/1 (FM1)
Stop
Full speed
Exhaust fan/2 (FM2)
Rotation
Rotation
Lock status
Rotation
[2]
[3]
[2] Exhausted air from the power supply section/paper exit
section of the main body
[4] Air flow inside the clean unit
[6] Exhausted air from the clean unit
Exhaust fan/2 (FM2)
Stop
Full speed
Exhaust fan/3 (FM3) Lock signal (LOCK)
Rotation
Rotation
Rotation
Lock status
P-111
P THEORY OF OPERATION > 9. CU-202
Exhaust fan/3 (FM3)
Stop
Full speed
Status
L Normal
H Clean unit fan's failure to turn
(C5360)
Service Manual