Sharp FO 4400 - B/W Laser - All-in-One Service Manual page 60

FO-4400U
FO-CS1
13. Timing chart
13-1. Print Starting
Printing Command
Polygon Motor(M3)
Main Motor (M1)
Paper Take-Up Solenoid (SL1)
Paper Take-Up Sensor (PS1)
Drum Charge
Exposure (output)
Development (output)
Image Transfer (output)
13-2. Print Ending
Paper Exit Sensor (PS3)
Polygon Motor (M3)
Exposure (output)
Drum Charge (output)
Development (output)
Image Transfer (output)
OFF
ON
(/PRINT)
OFF
OFF
OFF
OFF
ON
OFF
DC Charge
OFF
ON
OFF
Charge
OFF
ON
ON
ON
Main Motor (M1)
ON
ON
ON
-
ON
+
ON
ON
Charge
+
-
Fig. 14
OFF
DC Charge
Charge
+
-
+
Fig. 15
3 – 8
ON
ON
ON
DC Charge
+
-
OFF
OFF
AC Charge
OFF
OFF
OFF
OFF
-
ON
AC Charge
ON
+