October 2000 © TOSHIBA TEC
1
MR-2012 CONTENTS
CONTENTS
1.
SPECIFICATIONS ...................................................................................................... 1-1
2.
OUTLINE .................................................................................................................... 2-1
2.1 Names of Various Components ......................................................................................... 2-1
2.2 Layout of Electrical Parts .................................................................................................. 2-2
2.3 Harness Connection Diagram ............................................................................................ 2-4
2.4 Board Assembly ............................................................................................................... 2-5
3. OPERATIONAL DESCRIPTION ................................................................................. 3-1
3.1 General Operation ............................................................................................................. 3-1
3.2 Block Diagram .................................................................................................................. 3-1
3.3 Detection of Abnormal Status ........................................................................................... 3-2
3.3.1
Cover open/Close detection ................................................................................... 3-2
3.3.2
Feeder jam detection ............................................................................................. 3-2
3.3.3
ADF registration sensor stay jam detection ............................................................ 3-2
3.3.4
ADF read sensor unreached jam detection ............................................................ 3-2
3.3.5
ADF read sensor stay jam detection ...................................................................... 3-2
3.3.6
ADF exit sensor unreached jam detection .............................................................. 3-2
3.4 Flow Chart ........................................................................................................................ 3-3
4.
MECHANICAL DESCRIPTION .................................................................................. 4-1
4.1 Paper Feed System .......................................................................................................... 4-1
4.2 Document Size Detection Method ..................................................................................... 4-2
4.3 Drive System .................................................................................................................... 4-4
5.
CIRCUIT DESCRIPTION ........................................................................................... 5-1
5.1 PWA Block Diagram ......................................................................................................... 5-1
5.2 Detection Circuit ............................................................................................................... 5-1
5.3 ADF Read Sensor Input Circuit ......................................................................................... 5-2
5.4 ADF Motor Drive Circuit .................................................................................................... 5-3
5.5 Meaning of Signals ........................................................................................................... 5-4
5.6 Timing Chart ..................................................................................................................... 5-5
6.
DISASSEMBLY AND REPLACEMENT ..................................................................... 6-1
