Toshiba 4580, Service Manual

Page: 59 / 379

Mar. 1999 © TOSHIBA TEC 4 - 1 6570/5570 COPIER OPERATION
4. COPIER OPERATION
4.1 Operation Outline
Copier operation Operation during warm up and standby
Automatic feed copying using PRINT key
Copying operation Bypass-feed copying
Interrupt copying
4.2 Description of Operation
4.2.1 Warming up
(1) Initialize operation
•
The main switch is turned ON.
•
The heater lamp is turned ON.
•
Copy quantity indicator “1” and “WAIT WARMING UP” are displayed.
•
Fan
•
Initialization of the scanning optical system
~ The carriages move to their home positions and then stop.
~ The carriages move to the peak detection position.
~ The halogen lamp is turned ON. ~ The peak is detected. (white color detection of the shading
correction board) ~ The halogen lamp is turned OFF.
~ Original size indicators are initialized and move to a position indicating the copy area.
•
Initialization of the paper feed section
~ Each slot’s cassette trays move upward.
~ The ADU (auto-duplexing unit) guides move to the maximum size position after their home
position is detected.
•
Initialization of laser optical system
~ The polygon mirror is rotated.
~ The beam position is controlled.
•
Other
~ The main charger cleaner operates.
(2) Pre-running operation
When the heater reaches a preset temperature, the pre-run operation is carried out. (This operation
is not carried out if the heat roller is sufficiently hot.)
•
The fuser unit rotates.
•
The drum rotates.
~ The drum motor, fur brush motor and auger motor turns ON.
•
Maintenance of image control
~ A patch is formed on the drum, and the reflectivity of this patch is read so that the optimum
conditions are set.
•
This operation stops after 2 minutes of operation.