SHARP SF-A56 Service Manual

SERVICE MANUAL

CODE: 00ZSFA56SM//E

MODEL SF-A56

MODEL SF-A17

CONTENTS

[ 1 ] PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

[ 2 ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

[ 3 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

[ 4 ] STRUCTURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

[ 5 ] OPERATIONAL DESCRIPTIONS (MECHANISM SECTION) . . . . . . . . . . . 7

[ 6 ] DISASSEMBLY, ASSEMBLY AND ADJUSTMENT . . . . . . . . . . . . . . . . . 15

[ 7 ] CONNECTOR LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

[ 8 ] REPLACEMENT PARTS AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . 21

[ 9 ] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

[10] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

■ PARTS GUIDE

Parts marked with "! " is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

This document has been published to be used

SHARP CORPORATION

for after sales service only. The contents are subject to change without notice.

[1] PRODUCT OVERVIEW

The SF-A56/A17 is a reversing automatic document feeder (RADF)/ automatic document feeder (ADF) for the copier SF-2025/2030. The SF-A56 is capable of automatically copying both sides of document by inverting the document sheets up-side down, while feeding them.

Even document sheets of different lengths and the same width may be set in the document tray, an internal sensor in the ADF senses the document size when the document is fed. The copier automatically selects the proper copy paper corresponding to the document size along with the appropriate magnification ratio.

If the appropriate copy paper, respective to the document size and the magnification ratio, is not available, the copier stops copying and indicates the required paper size on the display.

[2] SPECIFICATIONS

• Document setting direction: Face-up

• Document setting position: Center alignment

• Document transfer system: Belt drive

• Document feed sequence: Bottom take-up feeding

(Face-up discharge)

• Document size: A3 ∼ A5 (Portrait), 11" × 17" ∼

8-1/2" × 5-1/2"

• Document changing time: 0.68sec or less

(Excluding the first copy)

• Document weight: Thin paper mode; 35 ∼ 50g/m

Standard mode; 51 ∼ 128g/m

• Max. No. of documents to be set:

50 sheets (A4, letter)

35 ∼ 80g/m2 (9 ∼ 21lb), 5mm thick or less 80 ∼ 128g/m2 (21 ∼ 33lb), 5mm thick or less

• Document stopper: Mechanical stopper

• Dimensions: SF-A56;

592 (W) × 521 (D) × 110 (H)mm 23-5/16" (W) × 20-33/64" (D) × 4-11/32" (H)

SF-A17;

571 (W) × 521 (D) × 110 (H)mm 22-31/64" (W) × 20-33/64" (D) × 4-11/32" (H)

• Weight: SF-A56; 11kg (24.3lbs)

SF-A17; 10kg (22.1lbs)

[Features]

• Document detection on tray (Irregular-sized documents are copied

without size recognition.)

• Recognized paper sizes: Japan;

A3, B4, A4, A4R, B5, B5R,

Inch series;

11" × 17", 8-1/2" × 14", 8-1/2" × 11", 8-1/2" × 11"R, 8-1/2" × 5-1/2"

Non-Japanese A/B series:

A3, B4, A4, A4R, A5

• Mixed document: Possible

• Document inversion: Automatic

[Display]

• Document feed indicator: Lights when documents are set on

feed tray and indicates that RADF is ready.

• Remove original indicator: When originals are placed manually,

the LED lights at the same time as exposure of the last document sheet is finished. The LED goes out when the document feed cover is opened.

[3] UNPACKING AND

INSTALLATION

1. UNP ACKING

2. INSTALLATION

SF-A56

SF-A17

– 1 –

Included parts

2. Mount the ADF onto the copier.

Remove the two cut-outs from the rear part of the upper cover of the copier.

Cut-outs

Rear part of upper cover

ADF tray

ADF mounting screws

(2 pcs.)

Right cover

(1 pc.)

ADF securing screws

(2 pcs.)

Tray securing screws

(2 pcs.)

Left cover

(1 pc.)

Unplug the copier and follow the procedure below.

1. Remove the document cover.

Open the document cover and lift it at a slight backward angle to remove it.

Insert the left and right covers (included parts) into the holes from which the document cover has been removed.

Document cover

Right cover

Install the two ADF mounting screws.

ADF mounting screws

Fit the ADF mounting screws into the holes in the hinges of the ADF and secure the ADF with the two ADF securing screws.

ADF securing screws

Left cover

ADF mounting screw

ADF securing screw

– 2 –

3. Adjust the angle of ADF.

Loosen the two securing screws for the angle adjusting panel attached to the hinge angle and then fasten the loosened screws while raising the angle adjusting panel completely.

5. Connect the ADF tray connector.

Thread the M4 x 8 tray securing screws (includedparts) partway into their holes, then connect thetray connector.

Tray connector

Tray securing screws

Connector on the ADF

Angle adjusting panel securing screws

Long hole

Hinge

Angle adjusting panel

NOTE: Be sure to check that the protrusion of the angleadjusting panel is securely inserted into the long hole of the hinge.

4. Connect the ADF connector.

Remove the connector cover from the copier’s rear cover. Next, connect the ADF connector to the connector on the copier.

6. Attach the ADF tray.

Loosen the two ADF tray securing screws, install the tray as shown in the figure, and fasten the tray securing screws.

Tray securing screws

Tray

Plug the copier into a grounded outlet and turn the power switch on. Then, follow the procedure below.

7. Set the mode.

• Operate the copier keys to set the mode.

ADF connector

Connector on the copier

Connector cover

5 0

The above key operation will display the currently set mode.

• When only the SF-A56 is to be set, immediately after the above

key operation, operate the keys as follows:

– 3 –

• If the mode is to be set in combination with other options, use the

table shown below to add up the total of the setting values for all the peripheral devices to be set, and set that total value.

For example, if the SF-A56 and sorter are to be set, the total setting value is 1 + 10 = 11. Operate the keys as follows:

The leading edge position can be adjusted within a range of 8 mm (8 steps) on the stopper side and 7 mm (7 steps) on the glass side in 1 mm increments. Adjustment can be done separately for the one-sided, two-sided, and thin paper modes.

01 02

041

SF-A17 1 Stand/paper drawer 4 Sorter 10 SF-A56 1 Staple sorter 10

8. Adjust the center of the copy.

Set an original in the ADF tray and make a copy. When the copy is off center as shown in Fig. 1 or Fig. 2, loosen the

two tray securing screws and adjust the tray by moving it in direction A orB as shown in the figure.

Mark

Tray securing screw

Stopper

Glass

View from the operator side

Setup example

(1) If the leading edge of the original was not fed all the way to the

stoppe r, enter value which will mov e the original towa rd the stopper side. 7, 6, 5, 4...

Original

Stopper

Glass

(2) If the copy image at the leading edge was distorted, enter value

which will move the original toward the glass side. 9, 10, 11...

Original

★ When off center as shown in fig. 1

Move the tray in direction A and secure it with the two mounting screws. Make a copy to check whether it is centered properly.

Fig. 1

Center of copy paper

Center of original image (first copy)

★ When off center as shown in fig. 2

Move the tray in direction B and secure it with the two mounting screws. Make a copy to check whether it is centered properly.

Fig. 2

Center of copy paper

Center of original image (first copy)

Stopper

Glass

(3) If the original overrode the stopper, enter value which will move

the original toward the glass side. 9, 10, 11, 12 ...

Original

Stopper

Glass

• After selecting test command 53 , enter a selected set value

between 0 and 15 using the copier keys.

(a) One-sided mode (b) Two-sided mode (c) One-sided thin paper mode

*For SF-A17, only (a) and (c) are possible.

(a)

(b)

(c)

9. Adjust the position of the leading edge of originals

• The position of the leading edge of originals fed from the ADF can

be determined using test command 53 .

• Although the leading edge has been factory set to stop at location

(8), it may need to be adjusted depending on the type of originals.

Set to between 0 and 15 as dictated by the copier's performance. The factory setting is "8".

– 4 –

[4] STRUCTURE

A. External fitting

Original guide

Original feed cover

Display lamp

B. Mechanism

Original stopper

Separation roller

A21 weight plate

Semi-circular roller

Original support

Original transport cover

Original exit section cover

Paper exit roller

Flapper

C. PWB distribution

Control PWB

Original reverse sensor PWB

Original timing sensor PWB

Separation roller

Weight plate

Semi-circular roller

Reverse sensor PWB (SF-A56 only)

LED PWB

Paper feed roller

Paper exit unit

Resist roller

Transport belt drive roller

Paper feed roller

Original transport belt

transport belt follower roller

SF-A56

Reverse roller

Resist roller

Transport belt

Paper exit roller

Original transport belt

Transport belt follower roller

SF-A17

D. Motors, solenoids, and clutches

■ Motors

Code Name Type Functions and operations Contact/output

DFM Paper feed motor DC motor Drives the pickup roller, the separation roller,

DTM Transport motor Stepping motor Drives the transport belt roller. DRM Reverse motor Stepping motor Drives the reverse roller and the paper exit roller. DFSOL Paper feed solenoid DC solenoid Presses the paper feed section weight plate onto

DRSOL Reverse solenoid DC solenoid Drives the reverse flapper to select the paper

DTM

and the resist roller.

the original and opens/closes the shutter.

exit path or the reverse feed path.

DRM (SF-A56 only)

When this is ON, the weight plate and the shutter fall.

When this is ON, the reverse path is selected.

DFM (SF-A56 only)

DRSOL (SF-A56 only)

DFSOL (SF-A56 only)

– 5 –

E. Sensor s, swit ch es, det ect or s

DFMRS

FGOD

DWS

AUOD

DSS

DFD

DLS1

DED

DTD

TGOD (SF-A56 only)

RDD (SF-A56)

DES (SF-A17)

DWVR

Code Name Type Functions and operations Contact/output

DFD Original feed sensor Reflection sensor Turns HIGH when the original lead edge

is fed just in front of the resist roller.

DTD Original timing sensor Reflection sensor Turns HIGH when the original lead edge

is transported from the paper feed section

HIGH when the original is sensed.

to the vicinity of the transport belt.

RDD Reverse sensor Reflection sensor Turns HIGH when the original lead edge

is transported to the reverse/paper exit

HIGH when the original is sensed.

path.

DED Original end sensor Photo interrupter Final paper detection on the tray LOW when the original is

sensed. DWVR Original width volume Slide volume Original width detection on the tray DLS1 Original length sensor 1 Photo interrupter Original length detection on the tray HIGH when the original is

sensed. DLS2 Original length sensor 2 Photo interrupter Original length detection on the tray (Inch

series only)

HIGH when the original is

sensed. DSS Original set sensor Photo interrupter Original detection on the tray HIGH when the original is

sensed. DFMRS Paper feed motor rotation sensor Photo interrupter Paper feed motor rotation detection Pulse output DWS Original width sensor Photo interrupter Original width detection LOW when the original is

sensed. AUOD ADF open/close sensor Microswitch ADF unit open/close detection LOW when closed. FGOD Paper feed guide switch Microswitch Paper feed cover open/close detection LOW when closed. TGOD Reverse guide switch Microswitch Reverse cover open/close detection LOW when closed. DES Paper exit sensor Photo interrupter Turns HIGH when the original lead edge

is transported to the paper exit path

HIGH when the original is

sensed.

– 6 –

[5] OPERATIONAL DESCRIPTIONS

(MECHANISM SECTION)

A. Operation flowchart

The figures below show the transport path of an original from the original setting, through paper feed, copying, to paper exit. For details of operations, refer to the operation process.

Original stopper

Separation roller

Resist roller

Separation roller

Resist roller

1) SF-A17 ADF mode (single copy mode) copying

Step 01: The transport section is closed. (AUOD OFF)

Step 02: An original is set on the original tray. (DSD

Step 03: Original feed display ON

Step 04: Print SW ON

(Preliminary paper feed):

Step 05: Paper feed motor (DFM) forward rotation

Step 06: Transport motor (DTM) forward rotation

A21 weight plate

Semi-circular roller

Transport belt drive roller

Paper feed roller

Weight plate

Semi-circular roller

Transport belt

Paper exit roller

START

↓

  ↓

↓

      ↓

     

Paper exit roller

Flapper

Original transport belt

transport belt

SF-A56

Original transport belt

SF-A17

output HIGH)

For the first original, dummy paper exit is performed.

(Paper feed roller, semi-circular roller rotation) Since the stopper is up, paper feed is not performed.

(Transport belt, paper exit roller rotation) * A: If there have been some originals on

the tray, they are discharged.

follower roller

Paper feed roller

Transport belt follower roller

Reverse roller

Paper exit unit

↓

Step 07: Paper feed motor (DFM) OFF

  ↓

Step 08: Paper feed solenoid (DFSOL) ON

      ↓

Step 09: Paper feed motor (DFM) forward rotation

  ↓

* A Step 10: The paper exit sensor (DES) senses the lead

    ↓

* A Step 11: Transport motor (DTM) rpm down

↓

Step 12: The original feed sensor (DFD) senses the

  ↓

Step 13: The original is stopped by the resist roller and

    ↓

Step 14: Paper feed motor (DFM) reverse rotation

      ↓

Step 15: The original width sensor (DWS) senses the

  ↓

Step 16: The original timing sensor (DTD) senses the

  ↓

Step 17: Paper feed motor (DFM) OFF

   ↓

* A Step 18: Paper exit sensor (DES) senses the paper

  ↓

* A Step 19: Original discharge

↓

Step 20: Transport motor (DTM) OFF

   ↓

(Paper feed)

↓

Step 21: Transport motor (DTM) forward rotation

   ↓

Step 22: Paper feed motor (DFM) reverse rotation

   ↓

Step 23: Original width sensor (DWS) output HIGH

↓

Step 24: Original timing sensor (DTD) senses the

 

(The weight plate and the stopper move down to press the original onto the semi-circular roller.)

The original feed is started.

edge of the discharged original. (DES output HIGH)

lead edge of the original. (DFD output HIGH)

the paper feed motor (DFM) is turned OFF.

(Resist roller rotation) The original lead edge is taken up by the resist roller.

original width. (Output LOW)

original lead edge. (DTD output HIGH)

(The original is stopped with its lead edge taken up by the resist roller.)

exit rear edge. (DES output LOW)

(The transport belt and the paper exit roller are stopped.)

(The transport belt and the paper exit roller rotate.)

(Resist roller rotation) The original is sent to the transport section.

original rear edge. (DFD output LOW)

– 7 –

↓

Step 25: Paper feed motor (DFM) OFF

  ↓

Step 26: Transport motor (DTM) OFF

   ↓

* B Step 27: Paper feed solenoid (DFSOL) OFF

       ↓

Step 28: Copier mirror base scanning is started.

↓

* E

DSS

    ↓

(Preliminary paper feed)

↓

Step 29: Paper feed motor (DFM) forward rotation

     ↓

Step 30: The original feed sensor (DFD) senses the

  ↓

Step 31: The original is stopped by the resist roller.

  ↓

Step 32: Paper feed motor (DFM) reverse rotation

     ↓

Step 33: The original width sensor (DWS) senses the

   ↓

Step 34: The original timing sensor (DTD) senses the

  ↓

Step 35: Paper feed motor (DFM) OFF

   ↓

Step 36: Copier mirror base scanning is stopped.

↓

(Paper exit)

↓

Step 37: Transport motor (DTM) forward rotation

   ↓

* D Step 38: The previous original discharge

↓

Step 39: Paper feed motor (DFM) reverse rotation

  

(Resist roller stops.)

(Transport belt, paper exit roller stop) Original stop

(The weight plate and the stopper move up.) * B: If there is no original on the tray, move

up the stopper and the weight plate.

LOW (No original on the tray) → After completion of mirror base scanning, go to step 48.

HIGH (There are some originals on the tray.)

↓

(Paper feed roller, semi-circular roller rotation) The original feed is started.

original lead edge. (DFD output HIGH)

Paper feed motor (DFD) OFF

(Resist roller rotation) The original lead edge is taken up by the resist roller.

original. (Output HIGH)

original lead edge. (DTD output HIGH)

(The original is stopped with its lead edge taken up by the resist roller.)

(Transport belt, paper exit roller rotation) The original discharge is started.

(Resist roller rotation) The original is sent to the transport section.

↓

Step 40: Paper exit sensor (DES) senses the original

  ↓

Step 41: Original width sensor (DWS) output HIGH

↓

Step 42: Original timing sensor (DTD) senses the

  ↓

Step 43: Paper feed motor (DFM) OFF

  ↓

Step 44: Paper exit sensor (DES) senses the

   ↓

* D Step 45: Transport motor (DTM) OFF

   ↓

Step 46: Paper feed solenoid (DFSOL) OFF

       ↓

Step 47: Copier mirror base scanning is started.

* E ↓

DSS

  ↓

Step 48: Transport motor (DTM) forward rotation

  ↓

* D Step 49: Previous original discharge

↓

Step 50: Paper exit sensor (DES) senses the

   ↓

Step 51: Transport motor (DTM) rpm down

↓

Step 52: Paper exit sensor (DES) senses the

   ↓

Step 53: Original discharge

↓

Step 54: Transport motor (DTM) OFF

  ↓

END

Note: * A: This operation is performed when there is an original on

the original table in advance. If there is no original on the original table, this operation is not performed.

* B: This operation is performed when there is no original on

the original table.

* C: When the is an original on the original tray, the original

set sensor (DSD) output becomes LOW.

* D: When the previous original remains in the paper exit

section, it is discharged.

rear edge. (DES output HIGH)

original rear edge. (DTD output LOW)

(Resist roller stop)

discharged original rear edge. (DES output LOW)

(Transport belt, paper exit roller stop) Original stop

(The weight plate and the stopper move up.) * B: When there is no original on the tray,

move up the stopper and the weight plate.)

HIGH (There are some originals on the tray.) → Go to step 29 (Preliminary paper feed).

LOW (No original on the tray)

(Transport belt, paper exit roller rotation)

discharged original lead edge. (DES output HIGH)

discharged original rear edge. (DES output LOW)

(Transport belt, paper exit roller stop)

– 8 –

2) SF-A56 RAD mode (duplex copy mode) copying

START

↓

Step 01: The transport section is closed. (AUOD ON)

↓

Step 02: An original is set on the original tray. (DSS

  ↓

Step 03: Original feed display ON

↓

Step 04: Print SW ON

↓

(Preliminary paper feed):

↓

* A Step 05: Paper feed motor (DFM) forward rotation

       ↓

Step 06: Reverse motor (DRM) forward rotation

  ↓

Step 07: Transport motor (DTM) rotation

     ↓

* A Step 08: Paper feed motor (DFM) OFF

      ↓

Step 09: Paper feed motor (DFM) forward rotation

     ↓

* B Step 10: Reverse sensor (RDD) senses the lead edge

   ↓

Step 11: Original feed sensor (DFD) senses the lead

   ↓

Step 12: Paper feed motor (DFM) OFF

  ↓

Step 13: Paper feed motor (DFM) reverse rotation

     ↓

Step 14: Original width sensor (DWS) senses the

  ↓

Step 15: Original timing sensor (DTD) senses the lead

    

output HIGH)

* A: For the first original, dummy paper exit

is performed.

(Paper feed roller, semi-circular roller rotation) Since the stopper is up, paper feed is not performed.

(Reverse roller, paper exit roller rotation)

(Transport belt rotation) * B: If there has been an original on the

tray, is discharged.

Paper feed solenoid (DFSOL) ON (The weight plate and the stopper move down to press the original onto the semi-circular roller.)

(Paper feed roller, semi-circular roller rotation) The original feed is started.

of the discharged original. (RDD output HIGH)

edge of the discharged original. (DFD output HIGH)

The original is stopped by the resist roller.

(Resist roller rotation) The lead edge of the original is taken up by the resist roller.)

original width. (Output LOW)

edge of the original. (DTD output HIGH)

↓

Step 16: Paper feed motor (DFM) OFF

   ↓

* B Step 17: Reverse sensor (RDD) senses the rear edge

     ↓

Step 18: Transport motor (DTM) OFF

  ↓

* B Step 19: Original discharge

↓

Step 20: Reverse motor (DRM) OFF

   ↓

(Preliminary paper feed):

↓

Step 21: Transport motor (DTM) forward rotation

     ↓

Step 22: Paper feed motor (DFM) reverse rotation

   ↓

Step 23: Original feed sensor (DFD)

   ↓

* C Step 24: Paper feed solenoid (DFSOL) OFF

       ↓

Step 25: Original width sensor (DWS) output HIGH

↓

Step 26: Original timing sensor (DTD) senses the rear

          ↓

Step 27: Reverse sensor (RDD) senses the lead edge

  ↓

Step 28: The lead edge of the original is moved

  ↓

Step 29: Transport motor (DTM) OFF

 ↓

Step 30: Reverse motor (RDM) OFF

    

(The original is stopped with its lead edge taken up by the resist roller.)

of the discharged original. (RDD output LOW) Reverse motor (DRM) rpm down

(Transport stop)

(Reverse roller, paper exit roller stop) (Paper feed reverse)

Transport motor, reverse motor (DRM) forward rotation (Reverse roller, paper exit roller rotation)

(Resist roller rotation) The original is sent to the transport section.

Senses the rear edge of the discharged original. (DFD output LOW)

(The weight plate and the stopper move up.) * C: If there is no original on the original

tray, move up the stopper and the weight plate.

edge of the original. (DTD output LOW) Paper feed motor (DFM) OFF (Resist roller stop) Reverse solenoid (DRSOL) ON (The flapper move up.)

of the original. (RDD output HIGH)

counterclockwise by the flapper.

(Transport belt stop)

(Reverse roller, paper exit roller stop)

– 9 –

↓

Step 31: Transport motor (DTM) OFF

  ↓

Step 32: Reverse motor (DRM) forward rotation

     ↓

Step 33: Paper exit sensor (RDD) senses the rear

   ↓

Step 34: Reverse motor (DRM) OFF

  ↓

Step 35: Transport motor (DTM) OFF

   ↓

Step 36: Reverse solenoid (DRSOL) OFF

  ↓

Step 37: Copier mirror base scanning is started.

* D ↓

DSS output

    ↓

(Preliminary paper feed)

↓

Step 38: Paper feed motor (DFM) forward rotation

     ↓

Step 39: Original feed sensor (DFD) senses the lead

   ↓

Step 40: Paper feed motor (DFM) OFF

  ↓

Step 41: Paper feed motor (DFM) forward rotation

     ↓

Step 42: Original width sensor (DWS) senses the

  ↓

Step 43: Original timing sensor (DTD) senses the lead

  ↓

Step 44: Paper feed motor (DFM) OFF

   ↓

Step 45: Copier mirror base scanning stop

  ↓

(Transport belt rotation)

(Reverse roller, paper exit roller rotation) The original is transported to the paper feed section.

edge of the reverse original. (RDD output LOW)

(Reverse roller, paper exit roller stop)

(Transport belt stop) Original stop

(The flapper moves down.)

LOW (There is no original on the tray.) → After completion of mirror base scanning, go to step 64. (Reverse rotation)

HIGH (There is an original on the tray)

↓

(Paper feed roller, semi-circular roller rotation) The original feed is started.

edge of the original. (DFD output HIGH)

The original is stopped by the resist roller.

(Resist roller rotation) The lead edge of the original is taken up by the resist roller.

original width. (Output LOW)

edge of the original. (DTD output HIGH)

(The original is stopped with its lead edge taken up by the resist roller.)

↓

(Reverse rotation)

↓

Step 46: Reverse solenoid (DRSOL) ON

  ↓

Step 47: Transport motor (DTM) forward rotation

     ↓

Step 48: Reverse sensor (RDD) senses the lead edge

   ↓

Step 49: The lead edge of the original is moved

  ↓

Step 50: Transport motor (DTM) OFF

  ↓

Step 51: Reverse motor (DRM) OFF

  ↓

Step 52: Transport motor (DRM) reverse rotation

  ↓

Step 53: Reverse motor (DRM) reverse rotation

     ↓

Step 54: Reverse sensor (RDD) senses the rear edge

   ↓

Step 55: Reverse motor (DRM) OFF

  ↓

Step 56: Transport motor (DTM) OFF

   ↓

Step 57: Reverse solenoid (DRSOL) OFF

  ↓

Step 58: Copier mirror base scanning start

↓

Step 59: Copier mirror base scanning stop

* E ↓

First-out

original

  ↓

(Paper exit paper feed reverse)

       

(The flapper moves up.)

(Transport motor rotation) Reverse motor (DRM) forward rotation (Rreverse roller, paper exit roller rotation)

of the original. (RDD output HIGH)

counterclockwise by the flapper.

(Transport belt stop)

(Reverse roller, paper exit roller stop)

(Transport belt rotation)

(Reverse roller, paper exit roller rotation) The original is transported to the paper feed section.

of the reversed original. (RDD output LOW)

(Reverse roller, paper exit roller stop)

(Transport belt stop) Original stop

(The flapper moves down)

NONE → After completion of mirror base scanning, go to step 82.

YES

↓

– 10 –

↓

Step 60: Transport motor (DTM) forward rotation

      ↓

Step 61: Paper feed motor (DFM) reverse rotation

   ↓

Step 62: Original feed sensor (DFD) senses the rear

   ↓

* C Step 63: Paper feed solenoid (DFSOL) OFF

       ↓

Step 64: Original width sensor (DWS) output LOW

↓

Step 65: Original timing sensor (DTD) senses the rear

  ↓

Step 66: Reverse sensor (RDD) senses the lead edge

   ↓

Step 67: Transport motor (DTM) rpm down

↓

Step 68: Original discharge

↓

Step 69: Reverse solenoid (DRSOL) ON

  ↓

Step 70: Transport motor (DTM) forward rotation

     ↓

Step 71: Reverse sensor (RDD) senses the lead edge

   ↓

Step 72: The lead edge of the original is moved

  ↓

Step 73: Transport motor (DTM) OFF

  ↓

Step 74: Reverse motor (DRM) OFF

  ↓

Step 75: Transport motor (DTM) reverse rotation

  ↓

Step 76: Reverse motor (DRM) forward rotation

        

(Transport belt rotation) Reverse motor (DRM) forward rotation Reverse roller, paper exit roller rotation) The original is discharged.

(Resist roller rotation) The original is sent to the transport section.

edge of the original. (DFD output LOW)

(The weight plate and the stopper moves up.) * C: When there is no original on the tray,

move up the stopper and the weight plate.

edge of the original. (DTD output LOW)

of the discharged original. (RDD output HIGH)

(The flapper moves up.)

(Transport belt rotation) Reverse motor (DRM) forward rotation (Reverse roller, paper exit roller rotation)

of the original. (RDD) output HIGH)

counterclockwise by the flapper.

(Transport belt stop)

(Reverse roller, paper exit roller stop)

(Transport belt rotation)

(Reverse roller, paper exit roller stop) The original is sent to the paper feed section.

↓

Step 77: Reverse sensor (RDD) senses the rear edge

  ↓

Step 78: Reverse motor (RDD) senses the rear edge

  ↓

Step 79: Transport motor (DTM) off

   ↓

Step 80: Reverse solenoid (DRSOL) OFF

  ↓

Step 81: Copier mirror base scanning start



* D

Note: * A: For the first original, the preliminary paper feed opera-

 ↓

DSS output

      ↓

(Paper exit)

↓

Step 82: Transport motor (DTM) forward rotation

      ↓

Step 83: Reverse sensor (RDD) senses the lead edge

   ↓

Step 84: Reverse sensor (RDD) senses the rear edge

        ↓

Step 85: Original discharge

↓

Step 86: Reverse motor (DRM) OFF

  ↓

END

tion is performed.

* B: When there is an original on the original tray in ad-

vance, it is discharged.

* C: When there is no original on the original tray, move up

the weight plate and the stopper.

* D: When there is no original on the original tray, the origi-

nal set sensor (DSS) output becomes LOW.

* E: It depends on whether there is any preliminary fed origi-

nal in step 38 ∼ step 44.

of the reverse original. (RDD output LOW)

of the reversed original. (RDD output LOW)

(Transport belt stop) Original stop

(The flapper moves down.)

LOW (No original on the tray) → After completion of mirror base scanning, go to step 46 (reverse).

HIGH (There is an original on the tray.) → Go to step 38 (Preliminary paper feed).

↓

(Transport belt rotation) Reverse motor (DRM) forward rotation (Reverse roller, paper exit roller rotation) The original is discharged.

of the discharged original. (RDD output HIGH)

of the discharged original. (RDD output LOW) Transport motor (DTM) OFF (Transport belt stop) Reverse motor (DRM) rpm down

(Reverse roller, paper exit roller stop)

– 11 –

B. Original size detection

The original size is detected in three ways of different purposes.

1) Original size detection by the original set tray

The original size detection by the original set tray is used in automatic paper size and automatic magnification selection mode, in order to recognize the original size when the original is set on the original tray, allowing the automatic selection of paper size and magnification ratio of copy.

When originals composed of sheets of different sizes are set, this detection method recognizes the largest sheet as the original size, which is determined by the width measured by the original width volume (DWVR) and the length measured by the original length sensors (DLS1, DLS2).

The original size is determined in the timing of original sensing by the original set sensor (DSS).

DLS1 DLS2

DWVR

AB series

Inch series

Document size,

setting orientation

A4 3 ● — B5 4 ● — A5 5 ● — A5R 7 ● — B5R 6 | — A4R 5 | — B4 4 | — A3 3 | — 11" × 8.5" 0 ●●

8.5" × 5.5" 1 ●●

8.5" × 5.5"R 2 ●● 11" × 8.5R" 1 | ● 14" × 8.5" 1 || 11" × 17" 0 ||

F: ON or L output (sensed)

●: OFF or H output DWVR DLS1 DLS2

– 12 –

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