Toshiba e-STUDIO182 Service Manual page 14

5.2 Items Shown on the Display Panel ................................................................................... 5-2
5.2.1 Display ............................................................................................................... 5-2
5.2.2 Message ............................................................................................................ 5-3
5.3 Relation between Equipment State and Operation ........................................................... 5-4
5.4 Operation .......................................................................................................................... 5-5
5.4.1 Block diagram .................................................................................................... 5-5
5.4.2 LED display circuit ............................................................................................. 5-6
5.5 Disassembly and Replacement......................................................................................... 5-7
5.5.1 Control panel unit............................................................................................... 5-7
5.5.2 Control panel PC board (HPNL) ........................................................................ 5-7
5.5.3 LCD PC board (LCD) ......................................................................................... 5-8
6. SCANNER ..................................................................................................................... 6-1
6.1 General Description .......................................................................................................... 6-1
6.2 Construction ...................................................................................................................... 6-2
6.3 Functions........................................................................................................................... 6-3
6.4 Description of Operation ................................................................................................... 6-5
6.4.1 Scanning operation ............................................................................................ 6-5
6.4.2 Scan motor drive circuit ..................................................................................... 6-6
6.5 Contact Image Sensor Unit Control Circuit ....................................................................... 6-8
6.5.1 Exposure LED control circuit ............................................................................. 6-8
6.5.2 CCD control circuit ............................................................................................. 6-9
6.6 Automatic Original Size Detection Circuit ....................................................................... 6-11
6.6.1 Principle of original size detection ................................................................... 6-11
6.6.2 Process of detection of original size ................................................................ 6-12
6.7 Disassembly and Replacement....................................................................................... 6-16
6.7.1 Original glass ................................................................................................... 6-16
6.7.2 Scanner top cover............................................................................................ 6-17
6.7.3 Automatic original detection sensor (APS sensor) .......................................... 6-18
6.7.4 Scan motor (M1) .............................................................................................. 6-18
6.7.5 CIS home position sensor (S1) ........................................................................ 6-20
6.7.6 Platen sensor (S2) ........................................................................................... 6-20
6.7.7 CIS unit (CIS)................................................................................................... 6-21
6.7.8 CIS case .......................................................................................................... 6-23
6.7.9 CIS unit drive belt-1 ........................................................................................ 6-24
6.7.10 CIS unit drive belt-2 ......................................................................................... 6-25
7. LASER OPTICAL UNIT ................................................................................................ 7-1
7.1 General Description .......................................................................................................... 7-1
7.2 Structure............................................................................................................................ 7-2
7.3 Laser Diode Control Circuit ............................................................................................... 7-5
7.4 Polygonal Motor Control Circuit ........................................................................................ 7-6
7.5 Disassembly and Replacement......................................................................................... 7-7
7.5.1 Laser optical unit................................................................................................ 7-7
8. DRIVE UNIT .................................................................................................................. 8-1
8.1 General Description .......................................................................................................... 8-1
8.2 Configuration..................................................................................................................... 8-2
8.3 Functions .......................................................................................................................... 8-3
8.4 Main Motor Control Circuit ................................................................................................ 8-4
8.5 Disassembly and Replacement......................................................................................... 8-6
8.5.1 Main motor (M3) ................................................................................................ 8-6
8.5.2 Toner motor (M2) ............................................................................................... 8-6
8.5.3 Main motor drive unit ......................................................................................... 8-7
9. PAPER FEEDING SYSTEM.......................................................................................... 9-1
9.1 General Description .......................................................................................................... 9-1
9.2 Configuration..................................................................................................................... 9-2
9.3 Functions........................................................................................................................... 9-3
9.4 Operation .......................................................................................................................... 9-5
e-STUDIO182/212/242
CONTENTS
© 2009 TOSHIBA TEC CORPORATION All rights reserved
2