Toshiba MR3011 User Manual

File No. 31100005

TOSHIBA TEC CORPORATION

General Precautions for Installation/Servicing/Maintenance for the MR-3011/3012

The installation and service should be done by a qualified service technician.

1. When installing the MR-3011/3012 to the Plain Paper Copier, be sure to follow the instructions described in the "Unpacking/Set-Up Procedure for the MR-3011/ 3012" booklet which comes with each unit of the MR-3011/3012.

2. The MR-3011/3012 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 servicing or maintaining the MR-3011/3012, be careful about the rotating or operation sections such as gears, pulleys, sprockets, cams, belts, etc.

5. When parts are disassembled, reassembly is basically the reverse of disassembly 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-3011/3012s, consumable parts and packing materials, it is recommended that the relevant local regulations/rules should be followed.

12. After completing installation, servicing and maintenance of the MR-3011/3012, return the MR-3011/3012 to its original state, and check operation.

PREPARATION FOR TRANSPORTATION OF COPIER

Before transporting a copier on which mounts the MR-3011/3012, take off the MR3011/3012 or insert a gaggers underneath the MR-3011/3012 as shown in the following figures.

1. Use pieces of the corrugated board came in the package of MR-3011/3012 or equivalent as the gaggers. Insert the gaggers as shown in the figure, then close the MR-3011/3012.

Height positioning stud

Gagger

2. Make sure that the height positioning stud is not in contact with the original glass.

Gagger

The height positioning stud is not in contact with the original glass.

CONTENTS

1. SPECIFICATION ......................................................................................... 1-1

2. CONFIGURATION....................................................................................... 2-1

3. SECTIONAL VIEW AND DRIVE SYSTEM.................................................. 3-1

3.1 Sectional View ....................................................................................... 3-1

3.2 Drive System ......................................................................................... 3-2

4. SYMBOLS AND LAYOUT OF ELECTRICAL PARTS /

DIAGRAM OF SIGNAL BLOCKS................................................................ 4-1

4.1 Symbols................................................................................................. 4-1

4.2 Layout of Electrical Parts ....................................................................... 4-3

4.3 Diagram of Signal Blocks....................................................................... 4-4

4.4 Description of Interface Signals............................................................. 4-5

5. DESCRIPTION OF OPERATIONS .............................................................. 5-1

5.1 Single Side Feeding .............................................................................. 5-1

5.2 Duplex Feeding...................................................................................... 5-5

5.3 Single Side Feeding (for Mixed Sized Originals).................................... 5-14

6. JAMMING.................................................................................................... 6-1

6.1 Feeding Jam .......................................................................................... 6-1

6.2 Transpor t Jam........................................................................................ 6-1

6.3 Exit Jam................................................................................................. 6-2

6.4 Reversing Jam....................................................................................... 6-2

7. ORIGINAL SIZE DETECTION..................................................................... 7-1

7.1 Method of Original Size Detection (for Standard Sized Originals)..... 7-1

7.2 Relation between Status of Sensor and Original Size

(for Standard Sized Originals) ........................................................... 7-3

7.3 Method of Original Size Detection (for Mixed Sized Original)............ 7-4

7.4 Relation between Status of Sensor and Original Size

(for Mixed Sized Originals) ................................................................ 7-5

8. FLOW CHART ............................................................................................. 8-1

9. TIMING CHART........................................................................................... 9-1

10. DESCRIPTION OF CIRCUITS .................................................................... 10-1

10.1 Input Circuits for Original Length Sensor, Read Sensor

and Reverse Sensor .............................................................................. 10-1

10.2 Irruptive Current Control Circuit............................................................. 10-2

10.3 Drive Circuit for Read Motor .................................................................. 10-3

10.4 Drive Circuit for Reverse Motor.............................................................. 10-4

October 2000 © TOSHIBA TEC MR-3011/3012 CONTENTS

10.5 Drive Circuit for Feed Motor................................................................... 10-5

10.6 Current Control Circuit for Feed Motor................................................... 10-6

10.7 Drive Circuit for Fan Motor..................................................................... 10-6

10.8 Drive Circuit for Reverse Solenoid......................................................... 10-7

10.9 Reset Circuit .......................................................................................... 10-7

10.10 EEPROM Circuit.................................................................................... 10-8

11. DESCRIPTION OF INPUT/OUTPUT SIGNALS.......................................... 11-1

11.1 REQ Signal, ACK Signal and TxD Signal .............................................. 11-1

11.2 DF-ACK Signal, DF-REQ Signal and RxD Signal.................................. 11-2

11.3 Input Circuits for Sensors ...................................................................... 11-3

12. DISASSEMBLY AND ADJUSTMENT .......................................................... 12-1

12.1 Pickup Roller and Feed Roller ............................................................... 12-1

12.2 Separation Roller................................................................................... 12-2

12.3 Reverse Solenoid .................................................................................. 12-3

12.4 Drive System ......................................................................................... 12-4

12.4.1 Fan motor .......................................................................................... 12-4

12.4.2 Read motor(MR-3011) ...................................................................... 12-5

12.4.3 Read motor(MR-3012) ...................................................................... 12-7

12.4.4 RADF open/close switch ................................................................... 12-8

12.4.5 Feed motor ........................................................................................ 12-9

12.4.6 Reverse motor................................................................................... 12-10

12.4.7 RADF open/close sensor .................................................................. 12-10

12.4.8 PC board ........................................................................................... 12-10

12.4.9 Jam access cover switch ................................................................... 12-10

12.4.10 Feed motor clock sensor .................................................................. 12-11

12.5 Tray sensor ............................................................................................ 12-11

12.6 Empty Sensor, Registration Sensor, Original Width Sensor and

Original Length Sensor.......................................................................... 12-12

12.7 Read Sensor.......................................................................................... 12-13

12.8 Exit Sensor ............................................................................................ 12-13

12.9 Reverse Sensor ..................................................................................... 12-14

12.10 Adjustment of registration...................................................................... 12-15

12.11 Adjustment of original registration for reversing operation..................... 12-16

12.12 Adjustment of reverse solenoid ............................................................. 12-17

12.13 Adjustment of RADF open/close switch................................................. 12-18

12.14 Adjustment of RADF open/close sensor................................................ 12-19

12.15 Adjustment of image skew..................................................................... 12-20

12.16 Adjustment of height (RADF)................................................................. 12-21

12.17 Initialization of EEPROM and Adjustment of Sensors ........................... 12-22

12.18 Attachment of Mylars............................................................................. 12-23

13. SERVICE ..................................................................................................... 13-1

13.1 Troubleshooting for Mechanical Errors .................................................. 13-1

13.2 Troubleshooting for Electrical Errors...................................................... 13-3

October 2000 © TOSHIBA TEC MR-3011/3012 CONTENTS

14. ASSEMBLY OF PC BOARD........................................................................ 14-1

15. PERIODIC MAINTENANCE ........................................................................ 15-1

16. CIRCUIT DIAGRAM / HARNESS DIAGRAM .............................................. 16-1

16.1 Circuit Diagram (MR-3011).................................................................... 16-1

16.2 Circuit Diagram (MR-3012).................................................................... 16-2

16.3 Control PC Board Circuit ....................................................................... 16-3

16.4 Harness Diagram (MR-3011)................................................................. 16-4

16.5 Harness Diagram (MR-3012)................................................................. 16-5

October 2000 © TOSHIBA TEC MR-3011/3012 CONTENTS

iii

1. SPECIFICATION

Model Name Capacity of Original Feeding Tray Feed Speed

Acceptable Original Size

Power Source Power Consumption Dimensions Weight

*Specification and appearance are subject to change without notice due to enhancedment of product quality.

MR-3011/MR-3012 Up to 100 sheets MR-3011:

Approx.16 sheets/min. (A4 or Letter, feed widthwise) [DP1600] Approx.20 sheets/min. (A4 or Letter, feed widthwise) [DP2000] Approx.25 sheets/min. (A4 or Letter, feed widthwise) [DP2500]

MR-3012:

Approx.35 sheets/min. (A4 or Letter, feed widthwise) [DP3500]

Approx.45 sheets/min. (A4 or Letter, feed widthwise) [DP4500] Smallest...A5-R Largest...A3 Thickness...50g/m2~127g/m2 (13.3lb~33.8lb) Power supplied from the copier 48W W557 × D497.3 × H165 (W22 inches × D19.6 inches × H6.5inches) Approx.13.6kg or 29.9lb

October 2000 © TOSHIBA TEC MR-3011/3012 SPECIFICATION

1-1

2. CONFIGURATION

Drive/control section

Original feeding tray

Original receiving tray

Jam access cover

Feeding/transportation section

Original feeding tray section Drive/control section

Mechanical

• Jam access cover

• Pickup roller

• Feed roller

• Separation roller

• Registration roller

• Read roller

• Reverse roller

• Exit roller

• Original feeding tray

Feeding/transportation section

Electrical parts

• Empty sensor

• Original length sensor

• Registration sensor

• Original width sensor

• Read sensor

• Reverse sensor

• Exit sensor

• Tray sensor

• Feed motor

• Read motor

• Reverse motor

• Reverse solenoid

• RADF open/close sensor

• RADF open/close switch

• Jam access cover switch

• PC board

October 2000 © TOSHIBA TEC MR-3011/3012 CONFIGURATION

2-1

3. SECTIONAL VIEW AND DRIVE SYSTEM

3.1 Sectional View

Tray sensor

Empty lever

Pickup roller

Feed roller

Registration sensor

Original width sensor

Registration roller

Flapper

Reverse guide

Small roller1

Separation roller

Original length

sensor

Exit sensor

Read

Reverse roller

Exit roller

sensor

Reverse sensor

Small roller4

Small roller3

Reverse flapper

Exit flapper

Read roller

Small roller2

October 2000 © TOSHIBA TEC MR-3011/3012 SECTIONAL VIEW

3-1

3.2 Drive System

(1) Feed motor rotating clockwise (as seen from the front side)

Feed motor

Rear side

One-way clutch (locked)

Spring clutch (Stops the drive for the clutch when the pickup roller reaches its upper limit position)

Pickup roller (lifted up)

Front side

Motor rotating clockwise to transport original

(2) Feed motor rotating counterclockwise (as seen from the front side)

Feed motor

Rear side

One-way clutch (slipped)

Front side

Motor rotating counterclockwise to transport original

Pickup roller (Down)

October 2000 © TOSHIBA TEC MR-3011/3012 SECTIONAL VIEW

3-2

(3) Read motor rotating clockwise (as seen from the front side)

Reverse motor

Read motor

Rear side

Reverse motor rotating clockwise to carry original to the reverse path.

Reverse roller

Exit roller

Front side

Transportation, scanning and original exit (read motor rotating clockwise)

Read roller

(4) Read motor rotating counterclockwise (as seen from the front side)

Reverse motor

Read motor

Rear side

Reverse motor rotating counterclockwise for back side registration and original discharge.

One-way gear

Reverse roller

Exit roller

Front side

Read motor rotating counterclockwise to transport mixed sized originals.

Read roller

October 2000 © TOSHIBA TEC MR-3011/3012 SECTIONAL VIEW

3-3

One-way gear

4. SYMBOLS AND LAYOUT OF ELECTRICAL PARTS / DIAGRAM OF SIGNAL BLOCKS

4.1 Symbols

(1) Motors

Symbol

RDMOT

RVMOT

FMOT

FAN

(2) Solenoid

Symbol

RSOL

Name RDMOT (Read motor)

RVMOT (Reverse motor)

FMOT (Feed motor)

FAN (Fan motor)

Name RSOL (Reverse solenoid)

Function

Drives transportation roller and exit roller

Drives reverse roller

Drives pickup roller, feed roller and registration roller

Cools down read motor

Function

Switches flapper

Remarks

Pulse motor

DC motor

Fan motor

Remarks

DC solenoid

October 2000 © TOSHIBA TEC MR-3011/3012 SYMBOLS

4-1

(3) Switches and Sensors

Symbol

JAMSW

OPNSW

EMPS REGS

EXITS SIZES1 SIZES2 SIZES3

TRYS

OPNSN

MCLK LENGS READS

RVRS

Name JAM-SW (Jam access cover switch) RADF-OPN-SW (RADF open/close switch) EMP-SNS (Empty sensor) REG-SNS (Registration sensor) EXIT-SNS (Exit sensor) SIZE-SNS 1 (Original width sensor 1) SIZE-SNS 2 (Original width sensor 2) SIZE-SNS 3 (Original width sensor 3) TRY-SNS (Tray sensor) RADF-OPN-SNS (RADF open/close sensor) MCLK-SNS (Feed motor clock sensor) LENG-SNS (Original length sensor) Read-SNS (Read sensor) RVR-SNS (Reverse sensor)

Function Switch to detect if jam access cover for feeding unit is opened/closed Switch to detect if RADF unit is opened/closed

Sensor to detect original on original tray Sensor to detect original at registration position Sensor to deteat original at exit area Original width detection sensor 1 Original width detection sensor 2 Original width detection sensor 3 Sensor to detect length of original on original

tray Sensor to detect if RADF unit is opened/closed

Detection sensor for feed motor clock Sensor to detect length of original Sensor to detect leading edge of original at

scanning position Sensor to detect original at reverse position

Remarks

Microswitch Microswitch Semiconductive

optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor Semiconductive optical sensor

(4) PC board

Symbol

PWA-DF

PWA-LGC-RADF (PC board)

Function Drives feeding and transportation

RemarksName

October 2000 © TOSHIBA TEC MR-3011/3012 SYMBOLS

4-2

4.2 Layout of Electrical Parts

JAMSW

TRYS

FMOT

RDMOT

FAN

OPNSW

MCLK

RVRS

READS

RVMOT

EMPS

OPNS

SIZES1

SIZES3

REGS

EXITS

LENGS

SIZES2

RSOL

RDMOT Read motor RVMOT Reverse motor FMOT Feed motor FAN Fan motor RSOL Reverse solenoid JAMSW Jam access cover switch OPNSW RADF open/close switch EMPS Empty sensor REGS Registration sensor EXITS Exit sensor SIZE 1 Original width sensor 1 SIZE 2 Original width sensor 2 SIZE 3 Original width sensor 3 TRYS Tray sensor OPNS RADF open/close sensor MCLK Feed motor clock sensor LENGS Orignal length sensor READS Read sensor RVRS Reverse sensor

October 2000 © TOSHIBA TEC MR-3011/3012 SYMBOLS

4-3

4.3 Diagram of Signal Blocks

PPC (copier)

ACK VARID EMPTY RxD SGND TxD SGND DF-ACK DF-REQ REQ RADFCNT

DC+24V

(Supplied from copier)

P+5V

(

Supplied from copier

DC+5V

Supplied from copier

(

RADF (Reversing Automatic Document Feeder)

JAMSWJAM-SW

OPNSWRADF-OPN-SW

EMPSEMP-SNS REGSREG-SNS

EXITSEXIT-SNS SIZES1SIZE-SNS1 SIZES2SIZE-SNS2 SIZES3SIZE-SNS3

TRYSTRY-SNS

OPNSRADF-OPN-SNS

MCLKMCLK-SNS LENGSLENG-SNS READSREAD-SNS

RVRSRVR-SNS

PWA-LGC-F513

Sensor

input

circuit

Communication

circuit

DC+24V

P+5V

CPU

Irruptive

current control

circuit

ROM

EEPROM

Driver

RSOL

FAN

FMOT FMOT

RDMOT

RVMOT

)

DC+5V

)

*1 Available only for MR-3011

4-4

4.4 Description of Interface Signals

The following 6 lines are used to send/receive signals between the copier and the RADF.

REQ ............. Communication request signal (from copier to RADF)

DF-REQ ....... Communication request signal (from RADF to copier)

DF-ACK........Response signal for communication request signal (from RADF to copier)

ACK..............Response signal for communication request signal (from copier to RADF)

TxD ..............Data sent from copier to RADF

RxD ..............Data sent from RADF to copier

Data communication (RxD and TxD) between the scanner and RADF has adopted the serial communication system which does not allow checking using testing devices to see whether the signals are sent/received properly in the field.

RADF Copier

REQ

DF-ACK

TxD

DF-REQ

ACK RxD

4-5

5. DESCRIPTION OF OPERATIONS

5.1 Single Side Feeding

(A4, registration ratio 100%) (1) Setting original

The original is set on the tray and the empty sensor is turned ON. The original set signal becomes ON.

(2) Start of pre-feeding operation n Completion of pre-feeding operation

A feed signal is sent from the main unit, and the feed motor rotates the pickup roller and feed motor to start feeding the original (pre-feeding operation).

(3) Start of feeding operation n Original length sensor OFF

The feed motor starts to rotate in reverse and the read motor rotates forward to rotate the registration roller and the read roller while the original is waiting in front of the registration roller and read roller starts to be transported. The feed motor is stopped after the original length sensor is turned OFF.

5-1

(4) Original length sensor OFF n Completion of sending operation

If the next original is waiting in the tray, the pickup roller is lowered after the feed motor which has started to rotate forward rotates for a cer tain number of pulses. (The pickup roller waits for the next pre-feeding operation in that lowered position.) The read motor rotates for a certain number of pulses and stops after the read sensor is turned ON. (The leading edge of the original reaches the pre-scanning position.)

(5) Start of scanning operation n Star t of pre-feeding operation for next original

The original transport signal is sent from the main unit, and the read motor starts to rotate forward. The read roller and exit roller are rotated to start scanning the original. The feed motor rotates the pickup roller and feed roller after the trailing edge of the original has passed the registration roller to start the pre-feeding operation for the next original.

(6) Start of pre-feeding operation for next original n Completion of pre-feeding operation

After the registration sensor has detected the leading edge of the original. The feed motor transports the original for a certain number of pulses, performs registration and stops.

5-2

(7) Start of feeding operation for next original n Completion of scanning operation

The feed motor starts to rotate in reverse, it rotates the registration roller to feed the next original waiting in front of the registration roller and read roller. The original set signal is reset when the empty sensor is turned OFF. The feed motor is stopped after the original length sensor is turned OFF. The scanning operation is completed when the trailing edge of the original being scanned has passed the scanning position.

(8) Completion of scanning operation n Completion of feeding operation for next original

The read motor rotates for a certain number of pulses and stops after the read sensor is turned ON. (The leading edge of the next original reaches the pre-scanning position.)

(9) Start of scanning operation for next original n Completion of original discharge

The read motor starts to rotate forward, it rotates the read roller and exit roller to start scanning the next original. Original discharge is completed when the trailing edge of the original has passed the exit roller.

5-3

(10)Completion of scanning operation for next original

Scanning is completed when the trailing edge of the next original has passed the scanning position and the original is carried toward the receiving tray.

(11)Exit sensor OFF (next original)

After the exit sensor is turned OFF, the feed motor rotates for a certain number of pulses till the original is completely discharged.

(12) Completion of or iginal discharge (next original)

The read motor is stopped when the next original is completely discharged into the receiving tray.

5-4

5.2 Duplex Feeding

(A4, reproduction ratio 100%) (1) Setting original

The original is set on the tray and the empty sensor is turned ON. The original set signal becomes ON.

(2) Start of pre-feeding operation n Completion of pre-feeding operation

A feed signal is sent from the main unit, and the feed motor starts to rotate forward and rotates the pickup roller and feed roller to start the pre-feeding operation. After the registration sensor detected the leading edge of the original, the feed motor transports the original for a certain number of pulses, performs registration and stops.

(3) Start of feeding operation n Original length sensor OFF

The feed motor starts to rotate in reverse and the read motor starts to rotate forward to start feeding the original waiting in front of the registration roller and the read roller. The feed motor is stopped after the original length sensor is turned OFF.

5-5

(4) Original length sensor OFF n Completion of feeding operation

If the next original is waiting on the tray, the pickup roller is lowered after the feed motor started to rotate forward rotates for a certain number of pulse. (The pickup roller waits for next pre-feeding operation in that lowered position.) The read motor rotates for a certain number of pulses and stops after the read sensor is turned ON. (The leading edge of the original reaches the pre-front side scanning position.)

(5) Start of front side scanning operation n Star t of pre-feeding operation for next original

An original transport signal is sent from the main unit, and the read motor and reverse motor start to rotate forward. The read roller, exit roller and reverse roller are then rotated. The reverse flapper is switched toward the reverse position by turning ON the reverse solenoid and the front side of the original, star ts to be scanned. The feed motor rotates the pickup roller and feed roller after the trailing edge of the original has passed the registration roller, to start the pre-feeding operation for the next original.

(6) Start of pre-feeding operation for next original n Completion of pre-feeding operation n Completion of front-

side scanning operation

After the registration sensor has detected the leading edge of the next original, the feed motor transports the original for a certain number of pulses, performs registration and stops. Scanning of the front side of original is completed when the trailing edge of the original being scanned has passed the scanning position.

5-6

(7) Completion of transport operation for front side of original (original paused at reverse position)

The read motor and reverse motor are stopped after the reverse sensor is turned OFF to complete transpor tation of the front side of the original.

(8) Start of back side registration operation n Completion of registration

The reverse motor starts to rotate in reverse and rotates the reverse roller in reverse to start the registration operation for the back side of the original pausing at the reverse position. After the reverse sensor has detected the trailing edge of the original, the feed motor transpor ts the or iginal for a certain number of pulses, performs registration and stops.

(9) Start of reverse feeding operation n Completion of reverse feeding operation

The read motor starts to rotate forward and the reverse motor starts to rotate in reverse. The read roller, exit roller and reverse roller are rotated to start the reverse feeding operation for the original waiting at the back side registration position. The read motor and reverse motor rotate for a cer tain number of pulses and stop after the read sensor is turned ON. (The leading edge of the original reaches the pre-back side scanning position.)

5-7

(10)Start of back side scanning operation n Or iginal passing reverse position

An original transport signal is sent from the main unit, and the read motor starts to rotate forward and reverse motor starts its reverse rotation activated by read rotate in reverse to rotate the read roller, exit roller and reverse roller. The reverse flapper is switched toward the reverse position by turning ON the reverse solenoid to start scanning the back side of the original. The reversal motor rotates for a cer tain number of pulses and stops after the trailing edge of the original has passed the reverse roller.

(11)Original passing reverse position n Completion of back side scanning operation

The reversal motor starts to rotate forward and rotates the reverse roller to be ready for the leading edge of the original to come into the reverse position. The scanning operation for the back side of the original is completed when the trailing edge of the original has passed the scanning position.

(12)Completion of transport operation for back side of original (original paused at reverse position)

The read motor and reverse motor are stopped after the reverse sensor is turned OFF to complete transpor tation of the back side of the original. The reverse flapper is switched to the exit side by turning OFF the reverse solenoid.

5-8

(13)Start of reverse discharge n Start of feeding operation for next original n Original length sensor OFF

The read motor starts to rotate forward and the reverse motor starts to rotate in reverse. The read roller, exit roller and reverse roller are rotated to start reverse discharge of the original paused at the reverse position. The feed motor rotates for a certain number of pulses after the reverse sensor is turned ON. It then starts to rotate in reverse to rotate the registration roller, and starts the feeding operation for the next original waiting in front of the read roller and registration roller. The original set signal is reset when the empty sensor is turned OFF. The reverse motor is stopped after the reverse sensor is turned OFF. The feed motor is stopped after the original length sensor is turned OFF.

(14)Original length sensor OFF n Completion of feeding operation for next original

The read motor rotates for a certain number of pulses and stops after the read sensor is turned ON. (The leading edge of the next original reaches the pre-scanning position for front side of original.)

(15)Start of front side scanning operation pre-scanning position for front side of original n Completion of

reverse discharge operation

The read motor and reverse motor start to rotate forward to rotate the read roller, exit roller and reverse roller. The reverse flapper is switched toward the reverse position by turning ON the reverse solenoid to star t the scanning of the front side of next original. The reverse discharge operation is completed when the trailing edge of the original has passed the exit roller.

5-9

(16)Completion of front side scanning operation

The scanning operation for the front side of the original is completed when the trailing edge of next original has passed the scanning position.

(17)Completion of transport operation for the front side of next original (original paused at reverse position)

The read motor and reverse motor are stopped when the reverse sensor is turned OFF to complete the transpor t operation for the front side of the original.

(18)Start of back side registration n Completion of back side registration

The reverse motor starts to rotate in reverse and the reverse roller rotates in reverse to start the registration of the next original paused at the reverse position. After the reverse sensor has detected the leading edge of the original, the reverse motor transpor ts the original for a certain number of pulses, performs registration and stops.

5-10

(19)Start of reverse feeding operation for next original n Completion of reverse feeding operation

The read motor starts to rotate forward and the revese motor starts to rotate in reverse. The read roller, exit roller and reverse roller are rotated to start the reverse feeding operation for the next original waiting at the back side registration position. The read motor and reverse motor rotate for a cer tain number of pulses and stop after the read sensor has been turned ON. (The leading edge of next original reaches the pre-scanning position for the back side of the original.)

(20)Start of back side scanning operation n Or iginal passing reverse position

The read motor starts to rotate forward and the reverse motor starts to rotate in reverse to rotate the read roller, exit roller and reverse roller. The reverse flapper is switched toward the reverse position by tur ning ON the reverse solenoid to start scanning the back side of the next original. The reverse motor rotates for a cer tain number of pulses and stops after the trailing edge of the next original has passed the reverse roller.

(21)Next original passing reverse position n Completion of back side scanning

The reverse motor starts to rotate forward and the reverse roller is rotated to be ready for the leading edge of the next original to come into the reverse position. The scanning of the back side of the original is completed when the trailing edge of the next original has passed the scanning position.

5-11

(22)Completion of transport operation for back side of next original (original paused at reverse position)

The read motor and reverse motor stop after the reverse sensor is turned OFF to complete transpor tation of the back side of the original. The reverse flapper is switched to the exit side by turning OFF the reverse solenoid.

(23)Start of reverse discharge operation of next original n Start of feeding operation for next original n Or iginal

length sensor OFF

The read motor starts to rotate forward and the reverse motor starts to rotate in reverse. The read roller, exit roller and reverse roller are rotated to start the reverse discharge of the next original paused at the reverse position. The reverse motor stops after the reverse sensor has been turned OFF.

(24)Exit sensor OFF

After the exit sensor has been turned OFF, read motor rotates for a certain number of pulses till the next original has completely discharge.

5-12

(25)Completion of reverse discharge operation for next original

The read motor is stopped when the next original is completely discharged into the original receiving tray to terminate the reverse discharge operation.

5-13

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