Toshiba 4511 10.1, 10.2, 10-5, 10-6, 10-7, 10-8, 10.3, 10-10, 10.4, 10-11, 11.1, 11-1, 11.2

8. LASER OPTICAL UNIT		8-1
8.1	General Description	8-1
8.2	Structure	8-3
8.3	Laser Diode	8-7
8.4	Laser Unit Cooling Fan	8-8
8.5	Polygonal Motor	8-8
8.6	Disassembly and Replacement	8-9

9. DRIVE SYSTEM			9-1
9.1	General Description		9-1
9.2	Main Motor		9-2
	9.2.1	Construction	9-2
	9.2.2 Drive circuit of main motor		9-3
	9.2.3 Signal level of motor circuit		9-3
9.3	Transport Motor		9-4
	9.3.1	Construction	9-4
	9.3.2 Drive circuit of transport motor		9-5
9.4	Developer Motor		9-6
	9.4.1	Construction	9-6
	9.4.2 Drive circuit of developer motor		9-7
9.5	Disassembly and Replacement		9-8

10. PAPER FEEDING SYSTEM		10-1
10.1	General Descriptions	10-1
10.2	Description of Operation	10-5
	10.2.1 Operation of bypass pickup roller	10-5
	10.2.2 Operation of drawer pickup roller	10-6
	10.2.3 Separation of paper	10-7
	10.2.4 General operation	10-8
10.3	Drive Circuit of Tray-up Motor	10-10
10.4	Disassembly and Replacement	10-11

11. DRUM RELATED SECTION		11-1
11.1	Construction	11-1
11.2	Functions	11-2
11.3	Output Control Circuits of High-Voltage Transformer	11-4
11.4	Drum Temperature Detection Circuit	11-5
11.5	Temperature/Humidity Sensor	11-6
	11.5.1 General description	11-6
	11.5.2 Construction	11-6
11.6	Charger Wire Cleaner	11-7
	11.6.1 Operation	11-7
	11.6.2 Construction	11-7
	11.6.3 Drive circuit	11-8
11.7	Disassembly and Replacement	11-9

November 2003 © TOSHIBA TEC iii e-STUDIO3511/4511 CONTENTS