Toshiba MR2012 User Manual
AUTOMA TIC DOCUMENT FEEDER
MR-2012
File No. 31100013
General Precautions for Installation/Servicing/Maintenance for the MR-2012
The installation and service should be done by a qualified service technician.
1. When installing the MR-2012 to the Plain Paper Copier , be sure to follow the instructions described in
the “Unpacking/Set-Up Procedure for the MR-2012” booklet which comes with each unit of the
MR-2012.
2. The MR-2012 should be installed by an authorized/qualified person.
3. Before starting installation, servicing or maintenance work, be sure to turn off and unplug the copier
first.
4. When servcing or maintaining the MR-2012, be careful about the rotating or operation sections such
as gear, pulleys , sproc k ets, cams , belts, etc.
5. When parts are disassembled, reassembly is basically the reverse of disassemb ly unless otherwise
noted in this manual or other related materials. Be careful not to reassemble small parts such as
screws, washers, pins, E-rings, toothed washers to the wrong places .
6. Basically, the machine should not be operated with any parts removed or disassembled.
7. Delicate parts for preventing safety hazard problems (such as breakers, thermofuses, fuses, door
switches, sensors, etc. if any) should be handled/installed/adjusted correctly .
8. Use suitable measuring instruments and tools.
9. During servicing or maintenance work, be sure to check the serial No. plate and other cautionary
labels (if any) to see if they are clean and firmly fixed. If not, take appropriate actions.
10. The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband,
because the ICs on it may be damaged due to static electricity . Before using the wrist band, pull out
the power cord plug of the copier and make sure that there is no uninsulated charged objects in the
vicinity.
11. For the recovery and disposal of used MR-2012, consumable par ts and packing materials, it is
recommended that the relevant local regulations/rules should be follo wed.
12. After completing installation, servicing and maintenance of the MR-2012, return the MR-2012 to its
original state, and check operation.
Copyright 2000
TOSHIBA TEC CORPORATION
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
October 2000 © TOSHIBA TEC 1 MR-2012 CONTENTS
1. SPECIFICATIONS
Function : Auto document feeder
No. of originals loaded : Up to 50 originals (13 to 29 lb)
Document size : A5-R (Min.) to A3 (Max.)
Dimensions : 530 (W) x 450 (D) x 120 (H) mm
Weight : Approx. 5.4 kg
Pow er supply : 5V, 24V (Supplied from copier)
October 2000 © TOSHIBA TEC 1 - 1 MR-2012 SPECIFICATIONS
2. OUTLINE
2.1 Names of Various Components
Document guide R
Connection Cable
Document tray
Document guide F
ADF top cover
ADF 02-01-01
October 2000 © TOSHIBA TEC 2 - 1 MR-2012 OUTLINE
2.2 Layout of Electrical Parts
SEN4
SEN2
VR1
SEN3
SEN6
SEN5
SW1
SEN1
ADF 02-02-01
ADF PWA
M1
ADF 02-02-02
MR-2012 OUTLINE 2 - 2 October 2000 © TOSHIBA TEC
Symbols and functions of various devices
Symbol
SW1
VR1
SEN1
SEN2
SEN3
SEN4
SEN5
SEN6
ADF
Name
ADFCOV-SW
ADF top cover open switch
WIDTH-VR
Document width sensor
ADFOPN-SEN
ADF open sensor
SIZE-SEN
Document length sensor
EMPTY-SEN
Document empty sensor
REGST-SEN
ADF registration sensor
POS-SEN
ADF read sensor
HAISI-SEN
ADF exit sensor
ADF PWA
Function
Detects the open/close state of the top cover
during jamming processing, etc.
Detects the width of document.
Detects the open/close state of the ADF unit.
Detects the length of document.
Detects the loading of document.
Detects the aligning position of document.
Detects the document scanning start position.
Detects the ejection of document.
PWA which relays the sensor signals and motor
M1
ADF-MOT
ADF motor
drive signals.
Drives the roller to transport originals.
October 2000 © TOSHIBA TEC 2 - 3 MR-2012 OUTLINE
2.3 Harness Connection Diagram
ADF
CN2
MOT+24V
+24V
COVER
1
2
3
N.O.
COM
top cover open switch
N.C.
ADF
Scanner control PWA
CN6
+24V 1
+24V
2
/AA34
/BB56
PG 7
PG
8
+5V 9
D/A
10
POS 11
REGST/ACK
12
VALID/DFFAN 13
5VPS
14
EMPTY 15
DF OPN
16
COVER/RXD 17
SG
18
WIDTH/TXD 19
SG
20
HAISI/DF-ACK 21
SIZE2/DF-REQ
ADF CNT/REQ 23
22
RADF CNT
24
SG 25
NC FG FG
26
CN3
1
MOT+24V
2
MOT+24V
3
A
4
/A
5
B
6
/B
1
2
3
4
5
6
7
8
NC
9
10
11
12
13
NC
14
15
16
17
18
19
20
21
22
23
24
NC
25
NC
26
NC
CN1
1
2
3
4
5
6
7
8
9
10
11
12
ADF PWA
13
14
15
16
17
18
19
20
21
22
CN4
HAI+5V
HAISI
POS
REG+5V
REGST
EMP+5V
EMPTY
OPN+5V
DF_OPN
CN5
WIDTH+5V
WIDTH
SIZE+5V
SIZE
1
2
SG
3
4
+5V
5
6
D/A
7
8
SG
9
10
11
SG
12
13
14
SG
15
1
2
3
SG
4
5
SG
6
1
2
NC
3
NC
4
5
6
NC
NC
NC
CN12
CN6
CN9
CN10
CN11
CN12
ADF motor
7
8
9
10
11
3
2
ADF exit sensor
1
3
2
ADF read sensor
1
3
ADF registration
2
1
3
2
Document empty sensor
1
3
2
ADF open sensor
1
3
2
Document length sensor
1
sensor
Document
width
sensor
ADF 02-03-01
MR-2012 OUTLINE 2 - 4 October 2000 © TOSHIBA TEC
2.4 Board Assembly
ADF 02-04-01
October 2000 © TOSHIBA TEC 2 - 5 MR-2012 OUTLINE
3. OPERATIONAL DESCRIPTION
3.1 General Operation
The ADF is an auto document feed unit capable of accommodating a maximum of 50 originals. The
originals loaded are fed and scanned one by one and stacked on the e xit tray. The ADF has a mechanical
section for document transport, sensors to detect the position of document, etc., and a motor for transport. It also has one PWA where comparator IC’s only are installed and the other signals simply pass.
For this reason, all control and processing are performed by the scanner PWA.
3.2 Block Diagram
ADF
Scanner
PWA
CN6
CN1
ADF
PWA
CN4CN5
CN2CN3
ADF read sensor
ADF open cover sensor
ADF registration sensor
Document empty sensor
ADF exit sensor
Document length sensor
Document width sensor
ADF top cover open switch
ADF motorM
ADF 03-02-01
October 2000 © TOSHIBA TEC 3 - 1 MR-2012 OPERA TIONAL DESCRIPTION
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