Sharp FO-4500, Service Manual

Page: 66 / 192

1) Warming Up After the initialization of the printer, warming up
of the printer starts and the Heater Lamp turns
ON until the temperature of the Upper Fusing
Roller reaches approx. 172˚C.
2) Standby In this standby mode, the temperature of the
Upper Fusing Roller is maintained at 156˚C.
When this condition continues for 3minutes, the
printer turns to Standby mode at low tempera-
ture.
3) Print Cycle When the printer obtains the printing command
from its controller, the Upper Fusing Roller is
maintained at 172˚C.
4) Standby at low
temperatuie The Upper Fusing Roller is maintained at
112˚C.
When a print is made soon after warming up
Temperature
Warming up Standby
Power ON
Time
Standby at low
temperature
172
156
112
( C)
Fig. 14
13. PRINT SEQUENCE
13-1. Print Starting 13-2. Print Ending
4000
20
M3 normal rotation
Unit: msec
Printing command
Polygon Motor
(M2)
Main Motor (M1)
Drum charge
Laser exposure
Development
Image transfer
Paper Take-Up
Sensor (PC1)
Paper Take-Up Sole-
noid (SL1/SL2)
500
150
2310
200
740
300
500
1st: 790~1300
2ad: 2670~3080
1st: 1510
2ad: 1680
Fig. 15
5160
480
Unit:msec
Polygon Motor (M2)
Main Motor (M1)
Drum charge
Laser exposure
Development
Image transfer
Paper Exit Sensor
(PC3)
FO-4500H
3 – 9