Laser 100WI5OO Service Manual
Principles
Figure 2-31 is the end of the print sequence.
printer stops the main motor (Ml) from rotatin&
when the paper exit sensor turns off after 2.53 seconds.
Paper Exit Sensor Off
Main
Off
[Sec.]
Drum
1.27
1.26
Charge
>
Laser
(LO)
Development
Transfer
Figure 2-31. Print Sequence (End)
2.1.2.7
Fan Motor Control
The fan motor
rotates
times
after initialization of the engine has beerr completed. The fan
motor rotates faster during printing. When printing ends, the fan motor slows down after 15
seconds.
[sec.]
M.
Figure 2-32. Fan Motor Speed Control Timing
the voltage of pin
on the engine controller board
does not exceed
for 1
second, the printer indicates a fan motor malfunction.
on
1 7
M.
2-33. Fan Motor Malfunction Search
2.1.2.8 Power Supply Circuit Function and Safety Protection
The printer’s power supply board
supplies the +5
and +24
The
+24
is used as the bias voltage supply, main motor (Ml) drive, seamer mirror motor
drive, fan motor
drive, and solenoid drive. For safety protection, the +24
line is cut
when the interlock switch (case open switch) is off.
AC IN
–
Power Supply Board
Inter Lock
------->
FG
2-34. Power Supply
Block Diagram
Rev.
2-15
