Minolta EDH-5, C-403, C-404, FN-7, FN-115 Service Manual

...

Option

Service Manual

EDH-5

C-403/C-404

FN-7/FN-115

Cover Inserter C

PK-3

ZK-2

TMG-2

Dual references may be used on the following:

Official Options name : Popular Options name

EDH-5 : RADF

C-403/C-404 : LT and LCT

FN-115 : FNS

FN-7 : FNS

Cover Inserte Cr : PI

PK-3 : PU

TMG-2 TU

ZK-2 : PZ

In-System Writer : ISW

EDH-5

RADF

CONTENTS

EDH-5

SAFETY AND IMPORTANT WARNING ITEMS

Refer to the Di850 service manual on page.......... S-1

1. OUTLINE

PRODUCT SPECIFICATIONS..................................1-1

CENTER CROSS-SECTIONAL DRAWING..............1-2

DRIVE SYSTEM DIAGRAM ......................................1-3

ORIGINAL CONVEYANCE PROCESS.....................1-4

[1] Single side original copy mode (large) .......1-5

[2] Single side original copy mode (small).......1-6

[3] Double side original copy mode (large)......1-7

[4] Double side original copy mode (small) .....1-8

[5] Mixed original copy mode...........................1-9

2. UNIT EXPLANATION

EXTERNAL SECTION...............................................2-1

[1] Composition ...............................................2-1

[2] Mechanisms ...............................................2-1

ORIGINAL FEED/CONVEYANCE/EXIT SECTION...2-2

[1] Composition ...............................................2-2

[2] Mechanisms ...............................................2-2

[3] Original Fe ed/Conveyance/Scan Control ...2-4 [4] Original Reversal and Conveyance

Control........................................................2-7

[5] Original Exit Control ...................................2-9

[6] Original Size Detection Control ................2-11

RADF

OUTLINE

RADF

PRODUCT SPECIFICATIONS

EDH-5

[1] Type

Type

Sheet-through type reversible DF

[2] Functions

Original size:

• Metric area A3 / B4 / A4 / A4R / B5 / B5R / A5 / A5R 11 x 17 / 8.5 x 14 / F4

• Inch area 11 x 17 / 8.5 x 14 / 8.5 x 11 / 8.5 x 11R /

5.5 x 8.5 / 5.5 x 8.5R A3 / B4 / A4 / B5 / B5R

• All sizes are detected automatically.

• Mixing of original sizes possible.

Original type: Plain original

50 to 200 g/m paper.

Special original

Original feed and conveyance ability may be

inferior to those of 50 to 130 g/m lbs high quality original. Only SDF mode single-sided passage allowed for 131 to 200 g/m2 or 35 to 45 lbs thick original. The following types of original cannot be used:

• OHP film

• Blueprint masters

• Label original

•Offset masters

• Bonded originals

Original curling:

10 mm maximum

or 14 to 45 lbs high quality

Original

or 14 to 35

Original read speed (copies per minute, 600dpi):

Mode Original size Feed speed

Single sided original A4/8.5x11 85

Double sided original A4/8.5x11 58

Original feed layout:

Face-up placement, centered, U-turn feed/ straight eject (large size/small size independent eject), reversal section placed at ejection side.

Original image read position:

At the slit glass section

[3] Machine Data

Power source:

DC24 V / 5 V (supplied from the main unit)

Max. power consumption:

Less than 180 VA

Weigh t:

Approx. 21.5 kg

Machine dimensions:

570

650

170

RADF

Unit: mm

Amount of curl

Maximum number of stacked originals:

100 sheets maximum (80 g/m

or 22 lbs)

[4] Maintenance

Maintenance : Same as the main body Service life : Same as the main body

[5] Operating Environment

Temperature:

10 to 30 °C (50 to 86 °F)

Humidity:

10 to 80 % RH

Note: The information herein may be subject to

change for improvement without notice.

1-1

EDH-5

CENTER CROSS-SECTIONAL DRAWING

RADF

1. Original conveyance roller

2. Registration roller

3. Double feed prevention roller

4. Separation roller

5. Original feed roller

6. Original feed tray

7. Original exit tray (for large-size original)

8. Original exit section (for small-size original)

9. Original exit roller 2

10. Original exit reversal roller

11. Original exit gate

12. Reversal conveyance roller 2

13. Reversal conveyance roller 1

14. Reversal roller

15. Original exit roller 1

16. Flapper

17. Read position

18. Slit glass

1-2

DRIVE SYSTEM DIAGRAM

FRONT

EDH-5

RADF

FRONT

1. Separation roller

2. Registration roller

3. Flapper drive SD (SD 301)

4. Original conveyance roller

5. Original conveyance motor (M301)

6. Flapper

7. Original feed motor (M302)

8. SDF switching SD (SD304)

9. Tray up/down drive motor (M303)

10. Original feed roller

11. Original exit gate SD (SD303)

12. Original exit gate

13. Pressure roller release SD (SD302)

14. Reversal conveyance roller

15. Original exit roller 1

16. Reversal roller

17. Original exit motor 1 (M304)

18. Original exit motor 2 (M305)

19. Original exit reversal roller

20. Original exit roller 2

1-3

EDH-5

ORIGINAL CONVEYANCE PROCESS

RADF

The RADF consists of a original feed section, conveyance section, reversal section, original exit reversal section, original exit tray (large), and original exit tray (small).

Original feed section

Original exit tray

Conveyance section

Reversal section

Slit glass (Read section)

The original placed faced up on the original feed tray is fed from the topmost original. The fed original is not conveyed to the original glass. Instead, it is read when it passes the slit glass placed in the conveyance path. The RADF operation consists of (a) single side original copy mode, (b) double side original copy mode, (c) mixed original copy mode and Z fold mode. Each has a different conveyance path. The conveyance path also depends on the original size.

Original exit reversal section

Original exit tray (small)

1-4

EDH-5

)

[1] Single side original copy mode (latge)

(single side to single side copy, single side to double side copy) The original set in the original feed tray is fed by the original feed roller and separation roller until PS306 (original registration detection) turns on.

1. Original registration detection PS (PS306

2. Separation roller

3. Original feed roller

4. Registration roller

When PS306 turns on, the registration roller prefeeds the original and original is rapidly conveyed to the conveyance roller. The speed of the conveyance roller changes to scan speed at predefined interval after PS306 turns ON and feeds the original over the slit glass. At this point, if the next original is present, it is pre-fed as soon as PS306 detects its leading edge.

1. Next original

2. Original exit roller 1

3. Flapper

4. Slit glass

The original is read when it passes over the slit glass. The original that has been read is conveyed along the circumference of the conveyance roller by the opening of the flapper, goes through original exit roller 1, and is exited to the original exit tray (large).

RADF

1. Original conveyance detection PS (PS308

2. Registration roller

3. Original conveyance roller

4. Slit glass

1-5

EDH-5

RADF

[2] Single side original copy mode (small)

(single side to single side copy, single side to double side copy) The original feed and conveyance actions up to scanning are performed in the same manner as for single side original copy mode (large). The original that has been scanned is fed to the original reversal unit by the reversal roller because the flapper is closed and the paper exit path is blocked. The original fed to the reversal unit passes through the original exit roller 2 and is exited to the original exit tray (small) since the original exit gate is closed.

1. Original exit roller 2

2. Original exit gate

3. Reversal roller

4. Flapper

Original reversal section

1-6

EDH-5

[3] Double side original copy mode (large)

(double side to single side copy, double side to double side copy) The original conveyance action up to the start of scanning of the front side of the first double side original is the same as for single side original copy mode (large). The original that has been scanned and read on the front side is fed by the reversal roller to the reversal unit since the flapper is closed and the original exit path is blocked. The original fed to the reversal unit does not fit in the reversal unit so the original exit gate opens to feed it to the original exit reversal section.

1. Original exit reversal roller

2. Original exit gate

When the original reversal detection PS (PS309) detects the trailing edge of the original and turns off, the reversal roller changes direction and feeds the original in the reversal section to the conveyance roller. Since the original is passed over the surface of the flapper, it is sent to the conveyance roller with sides reversed. The original reaching the conveyance roller does not exit the reversal roller so the pressure roller is released. The conveyance roller feeds this original over the slit glass for scanning.

3. Reversal roller

4. Flapper

The original that has completed scanning of the back side is fed inside the reversal unit once again since the flapper is closed. When PS309 detects the trailing edge of the original and turns off, the reversal roller changes direction and feeds the original in the reversal unit to the conveyance roller. Since the flapper is now opened, the original is fed along the flapper, passes through original exit roller 1, and is exited to the original exit tray (large).

RADF

1. Original reversal detection PS (PS309)

2. Reversal roller

3. Pressure roller

4. Flapper

1-7

1. Reversal roller

2. Original exit roller 1

3. Flapper

EDH-5

RADF

[4] Double side original copy mode (small)

(double side to single side copy, double side to double side copy) The original conveyance action up to the start of scanning of the back side is the same as double side original copy mode (large). The original that has been scanned and read on the back side is fed by the reversal roller to the reversal section since the flapper is closed and the original exit path is blocked. Then the original exit gate opens and the original is fed to the original exit reversal section.

1. Original exit reverse detection PS (PS313)

2. Original exit reversal roller

When PS313 (original exit reverse detection) detects the trailing edge of the original and turns off, the original exit reversal roller changes direction and feeds the original to the original exit gate. Since the original exit gate is closed, the original passes over the original exit gate and is exited from the original exit roller 2 to the original exit section (small) with sides reversed.

1. Original exit roller 2

2. Original exit reverse detection PS (PS313)

3. Original exit gate

4. Reversal roller

3. Original exit reversal roller

4. Original exit gate

1-8

EDH-5

[5] Mixed original copy mode

The mixed original copy mode supports both the same series originals and different series originals. However, since the size of the original in the conveyance direction is determined by the ON interval of PS306, size detection is performed prior to scanning.

The subsequent operations are the same as other copy modes.

For details on size detection, refer to section [6] Original Size Detection Control in section 2. UNIT EXPLANATION.

RADF

1-9

RADF

UNIT EXPLANATION

RADF

EXTERNAL SECTION

EDH-5

[1] Composition

1. Original feed tray

2. Original exit section (for small-size original)

[2] Mechanism

Mechanism Method

Jam removal *1Jam access cover

Jammed original release knob Original conveyance guide open/close lever Platen guide

*1 Jam removal

If an original jam occurs during original feed, open the Jam access cover and the original conveyance guide by releasing the original conveyance guide open/close lever, then turn the jammed original release knob to remove the jammed original.

RADF

3. Original exit tray (for large-size original

4. Jam access cover

If an original jam occurs during original reversal operation, open the platen guide to remove the jammed original .

Lock

If an original jam occurs during original exit, open the original feed tray and original exit tray (for large-size original) to remove the jammed original.

Platen guide

Original feed tray

1. Jam access cover

2. Original conveyance guide open/close lever

3. Original conveyance guide

4. Jammed original release knob

Original exit tray (for large-size original)

2-1

EDH-5

ORIGINAL FEED / CONVEYANCE / EXIT SECTION

RADF

[1] Composition

1. Original exit gate solenoid (SD303)

2. Pressure roller release solenoid (SD302)

3. Flapper drive solenoid (SD301)

4. Original feed tray

5. Jam access cover

[2] Mechanism

Mechanism System

Original feed Original feed roller

Double feed prevention

Original conveyance Original conveyance roller

Original conveyance path selection *1

Original reverse and feed *2

Original exit path selection *3

Double feed prevention roller Separation roller

Flapper

Reversal roller pressure Reversal roller rotation

Gate 1 Gate 2

6. Original conveyance motor (M301)

7. SDF switching solenoid (SD304)

8. Original feed motor (M302)

9. Original exit motor 1 (M304)

10. Original exit motor 2 (M305)

*1 Original conveyance path selection

In the two-sided copy mode, the original conveyance path selected after completion of scanning differs depending on whether the image on the front surface is to be printed or the image on the back surface is to be printed. A flapper is used to switch between these original conveyance paths. The flapper drive solenoid (SD301) is turned on/off to switch between the reversal section and the original exit section.

FRONT

Flapper drive SD (SD301)

2-2

Flapper

EDH-5

*2 Reversed original feed

In the double-side copy mode, the original fed to the reversal section is fed back by pressing the the pressure roller against the reversal roller. The pressure roller is driven by the pressure roller release solenoid (SD302).

Pressure roller release solenoid (SD302)

Pressure roller

FRONT

*3 Original exit path switching

Large-size one-side and two-side originals are exited to the original exit tray (for large-size original). On the other hand, small-size one-side and two-side originals are exited to the original exit section (for small-size original) through the reversal section. The small-size two-side original fed to the reversal section is reversed and exited to the small size original exit section. The original exit path switching to which the original is exited is performed by the gate 1 and gate 2, driven by the on/off contol of the original exit gate solenoid (SD303).

Original exit gate solenoid (SD303)

Original exit gate

FRONT

RADF

2-3

EDH-5

RADF

[3] Original Feed / Conveyance / Scan Control

PS312 PS311 PS308 PS301 PS316 PS315 PS305 PS306

MS301

5VDC

PS312

PS312 LED CONT

5VDC

SGND

PGND

24VDC

5VDC

PS311

PS311 LED CONT

DF VALID

DF CTS

DF DTR

DF RXD

DF RTS

DF TXD

DF DSR

5VDC

PS308

PS308 LED CONT

SD304

PS301

24VDC

SD304 DRIVE

MAIN BODY

riginal feed is performed by the original feed roller and separation roller driven by M302 (original feed). Original conveyance is performed by the original conveyance roller driven by M301 (original conveyance). M301 and M302 are controlled by DFCB (RADF control board).

1. Operation

a. Sensor activation at power ON

When SW1 (main) is ON, a sensitivity adjustment for PS306 (original registration detection), PS308 (original conveyance detection), PS311 (original skew detection 1) and PS312 (original skew detection 2) are performed. However, automatic adjustment is not performed when the RADF jam access cover is opened and MS301 (cover open/close MS) is OFF or when there is original inside the RADF.

SGND

5VDC

SGND

PS316

5VDC

PS315

SGND

5VDC

PS305

SGND

DFCB

PGND

FM301 LD

FM301 DRIVE

M302 DRIVE B

M302 DRIVE A

24VDC

M301 DRIVE A

M301 DRIVE B

FM301 M302 M301 M303

b. Pressing original against roller

(1) First original

When a control signal is received from the main body, M303 (tray up/down drive) turns forward to raise the original feed tray. By this moment, the original is raised and pressed against the original feed roller. After PS315 (tray upper limit detection) turns ON, M303 stops after a predefined interval and leaves the original feed tray raised in standby state. After M302 feeds the first original, M303 rotates backward after a predefined time has elapsed since it stopped, lowering the original feed tray, and the pressure on the originals is released. M303 continues to rotate backward for a predefined interval and then stops and remains in standby state. At this point the original feed tray waits without lowering to the bottom.

(2) Second and subsequent originals

When PS308 (original conveyance detection) detects the leading edge of the first original and turns ON, M303 that was in standby turns forward to raise the original feed tray and presses the original against the original feed roller. Subsequent operations are the same as for the first original.

5VDC

PS306

PS306 LED CONT

M303 DRIVE B

M303 DRIVE A

MS301

M303 DRIVE A

24VDC

2-4

EDH-5

c. Original feed

M302 drives the original feed roller and separation roller. When a control signal from the main body is received, M302 rotates forward at low speed, stops, and goes into standby. When the original feed tray is raised and PS315 turns ON, M302 turns backward after a predefined interval to start original feed operation. Then, when PS306 (original registration detection) detects the leading edge of the original and turns ON, M302 switches to high speed forward after a predefined interval to complete the original feed operation. After completing original feed at high speed forward, M302 returns to low speed forward and stops and goes into standby when PS308 (original conveyance detection) turns ON.

d. Original conveyance operation

When feeding the first original, M302 transports the original to the conveyance roller by continuing to rotate at high and low speed. During this time, M301 (original conveyance) starts rotating forward at low speed at predefined time after PS306 turns ON. The original reached to the conveyance roller is then conveyed to the scan position. After starting conveyance of the first original, M301 continues to rotate forward at low speed until the last original is scanned.

e. Scan operation

The original is passed over the slit glass of the optics unit by the low speed forward rotation of M301 and read (scanned). While the original is being scanned, original feed and conveyance operations continue, triggered by the turning ON of PS308.

f. Original mis-centering detection control

PS311 (original skew detection 1) and PS312 (original skew detection 2) are provided to detect the inclined leading edge of the original during conveyance. PS311 and PS312 are placed at the front and back of the pre-scan conveyance path and determine the inclination of the original by measuring the difference in interval at which the leading edge of the original turns these switches ON. A skewed image caused by original inclination is corrected through image processing so that the

image on the original is copied to a copy paper as it is on the original.

g. SDF (Single Document Feeder) control

When SDF mode is selected, SD304 (SDF switching SD) cut the drive force to the double feed prevention roller to facilitate original feeding.

(1) ON timing

At the start of original feed

(2) OFF timing

When PS306 turns OFF

h. FM301 (ADF fan) operation

FM301 is used to cool M301 so that M301 does not overheat during operation.

(1) ON timing

At the start of original feed

(2) OFF timing

When original ejection completed.

i. Jammed original ejection control

Upon receiving a control signal from the main body, M301 rotates at high speed forward, attempting to eject a jammed original in the RADF.

2. Signals

a. Input signal

(1) MS301 (MS301 to DFCB)

Jam access cover open/close detection signal. [L]: Cover opened [H]: Cover closed

(2) PS301 (PS301 to DFCB)

RADF open/close detection signal. [L]: RADF closed [H]: RADF opened

(3) PS305 (PS305 to DFCB)

No original on original feed tray detection signal. [L]: Original present [H]: No original

(4) PS306 (PS306 to DFCB)

Original feed over original conveyance roller detection signal. [L]: Original present [H]: No original

(5) PS308 (PS308 to DFCB)

Pre-scan position original detection signal. [L]: Original present [H]: No original

RADF

2-5

EDH-5

RADF

(6) PS311 (PS311 to DFCB)

Front side original skew detection signal. [L]: Original present [H]: No original

(7) PS312 (PS312 to DFCB)

Rear side original skew detection signal. [L]: Original present [H]: No original

(8) PS315 (PS315 to DFCB)

Original feed tray upper limit detection signal. [L]: Tray at upper limit [H]: Tray not at upper limit

(9) PS316 (PS316 to DFCB)

Original feed tray lower limit detection signal. [L]: Tray at lower limit [H]: Tray not at lower limit

(10) FM301 LD (FM301 to DFCB)

Goes [L] when FM301 reaches predefined speed.

(11) DF TXD (MAIN BODY to DFCB)

Serial data for transmitting main body PRCB operating status to RADF.

(12) DF RTS (MAIN BODY to DFCB)

Send the Request To Send signal from main body PRCB to RADF.

(13) DF DSR (MAIN BODY to DFCB)

Send the Data Set Ready signal from main body PRCB to RADF.

b. Output signals

(1) PS306 LED CONT (DFCB to PS306)

Reflective sensor PS306 LED ON/OFF control signal. [L]: PS306 LED ON [H]: PS306 LED OFF

(2) PS308 LED CONT (DFCB to PS308)

Reflective sensor PS308 LED ON/OFF control signal. [L]: PS308 LED ON [H]: PS308 LED OFF

(3) PS311 LED CONT (DFCB to PS311)

Reflective sensor PS311 LED ON/OFF control signal. [L]: PS311 LED ON [H]: PS311 LED OFF

(4) PS312 LED CONT (DFCB to PS312)

Reflective sensor PS312 LED ON/OFF control signal. [L]: PS312 LED ON [H]: PS312 LED OFF

(5) M301 DRIVE (DFCB to M301)

M301 A phase drive signal.

(6) M301 DRIVE (DFCB to M301)

M301 B phase drive signal.

(7) M302 DRIVE (DFCB to M302)

M302 A phase drive signal.

(8) M302 DRIVE (DFCB to M302)

M302 B phase drive signal.

(9) M303 DRIVE (DFCB to M303)

M303 A phase drive signal.

(10) M303 DRIVE (DFCB to M303)

M303 B phase drive signal.

(11) FM301 DRIVE (DFCB to FM301)

FM301 ON/OFF drive signal. [L]: FM301 ON [H]: FM301 OFF

(12) DF TXD (DFCB to MAIN BODY)

Serial data for transmitting RADF operating status to main body PRCB.

(13) DF DTR (DFCB to MAIN BODY)

Send the Data Terminal Ready signal from RADF to main body PRCB.

(14) DF CTS (DFCB to MAIN BODY)

Send the Clear To Send signal from RADF to main body PRCB.

(15) DF VALID (DFCB to MAIN BODY)

Image forming start signal.

A, A

B, B

A, A

B, B

A, A

B, B

2-6

EDH-5

[4] Original Reversal and Conveyance Control

PS308 PS309 PS304 PS306

5VDC

PS308

PS308 LED CONT

5VDC

SGND

PGND

24VDC

MAIN BODY

In two side copy mode, an original that has been scanned on the front side is conveyed to the original reversal section to be reversed and then rescanned. At entrance to the original reversal section, there is a flapper to switch the original conveyance path. The flapper is driven by SD301 (flapper drive). The reversal roller, which reverses and conveys front-side-scanned original to the original reversal section and feeds that original to the scan section again, is driven by M304 (original exit 1). The original reversal roller which conveys original to the original reversal section is driven by M305 (original exit 2). When reversing and feeding large originals, the pressure roller is released by SD302 (pressure roller release). M304, M305, SD301, and SD302 are controlled by DFCB (RADF control board).

DF VALID

DF CTS

PS309

PS309 LED CONT

DF DTR

DF RXD

DF RTS

DF DSR

5VDC

DF TXD

5VDC

PS304

PS304 LED CONT

5VDC

PS306

PS306 LED CONT

DFCB

24VDC

SD301 DRIVE

SD301 SD302 SD303

PS313

5VDC

PS313

PS313 LED CONT

24VDC

SD302 DRIVE

M305 DRIVE B

24VDC

SD303 DRIVE

24VDC

M305 DRIVE A

M302 DRIVE B

M304M305

24VDC

M304 DRIVE B

M304 DRIVE A

M302 DRIVE B

M302 DRIVE A

24VDC

M301 DRIVE A

M302 M301

M301 DRIVE A

M301 DRIVE B

MS) is OFF or when there is original inside the RADF.

b. Original conveyance path switching/reversal

and original feed operation

(1) Small size original

SD301 is always OFF and the flapper is closed. Therefore, the scanned original, whether it is single side or double side, is conveyed to the reversal section by M304 rotating at low speed forward. When copying the back side of a double-side original, at predefined interval after PS309 (original reversal detection) detects the trailing edge of original and turns OFF, M304 rotates backward at low speed and then at high speed to reverse and feed the original. The reversed original is conveyed through the flapper and the guides to the conveyance roller.

RADF

1. Operation

a. Sensor activation during power ON

When SW1 (main) is turned ON, a sensitivity adjustment for PS309 (original reversal detection) and PS313 (original exit reverse detection) are performed. However, automatic adjustment is not performed when the RADF jam access cover is opened and MS301 (cover open/close

2-7

EDH-5

RADF

(2) Large size original

The scanned-single side original is conveyed to the original exit tray (large) by the original conveyance roller since SD301 is ON and the flapper is opened. In the case of large double-side original, the original is conveyed to the reversal section when SD301 turns OFF after scanning the front side of a double-side original . The original reaching the reversal section does not fit in the reversal section so it is fed to the large-size original exit tray side by the large original reversal roller, which is driven by M305 (original exit 2). During this time, SD303 (original exit gate) turns ON and the original exit gate is closed. The original conveyed to the reversal section is reversed and fed to the scan section again in the same manner as small originals. Since the original reaching the conveyance roller does not exit the reversal roller, SD302 is turned ON at predefined interval after high speed backward rotation of M304 to release the pressure roller for the reversal roller. This enables original conveyance using the conveyance roller. SD302 turns OFF when it detects an image scan complete signal from the main unit.

c. Two side original next original feed operation

(1) Small size original

During front-side scanning of two-side original, the original feed of the next one is started by the rotation of M302 (original feed) when PS306 (original registration detection) detects the trailing edge of the previous original and turns OFF. The next original stops and waits in standby at predefined interval after the turning ON of PS306 by its own leading edge. When the back side of the first original is scanned and PS308 (original conveyance detection) turns ON, M302 turns ON after a predefined interval to resume original feed to scan the front side of the next original. Thereafter, the same operation is repeated.

(2) Large size original

During front-side scanning of double-side original, the original feed of the next original is started when PS306 (original registration detection) detects the trailing edge of the previous original and turns OFF. The next original stops and waits in standby at predefined interval after the turning ON of PS306 by its own leading edge.

During ejection of previous original by reverse and exit operation, when PS309 (original reversal detection) detects the trailing edge of the previous original and turns OFF, M302 turns ON after a predefined interval to resume original feeding to scan the front side of the next original. Thereafter, the same operation is repeated.

Note: See [5] Original Exit Control for informa-

d. Jammed original ejction control

tion on reverse and exit operation.

Upon receiving a control signal from the main unit, M304 and M305 rotate at high speed forward, attempting to eject a jammed original in the RADF.

2. Signals

a. Input signals

(1) PS304 (PS304 to DFCB)

Reversal section original detection signal. [L]: Original present [H]: No original

(2) PS309 (PS309 to DFCB)

Reversal section entrance original detection signal. [L]: Original present [H]: No original

(3) PS313 (PS313 to DFCB)

Original ejection reversal section original detection signal. [L]: Original present [H]: No original

b. Output signal

(1) M304 DRIVE (DFCB to M304)

M304 A phase drive signal.

(2) M304 DRIVE (DFCB to M304)

M304 B phase drive signal.

(3) M305 DRIVE (DFCB to M305)

M305 A phase drive signal.

(4) M305 DRIVE (DFCB to M305)

M305 B phase drive signal.

A, A

B, B

A, A

B, B

2-8

EDH-5

[5] Original Exit Control

PS307 PS309 PS304

5VDC

SGND

PS307

5VDC

SGND

The ejection destination of the original that has been scanned depends on the size of original. The original exit roller 1 which conveys the original to the original exit tray (large) is driven by M304 (original exit 1). The original exit roller 2 which conveys the original to the original exit section (small) is driven by M305 (original exit 2). The flapper which switches the original exit path and the original exit gate are driven by SD301 (flapper drive) and SD303 (original exit gate) respectively. M304, M305, SD301, and SD303 are controlled by DFCB (RADF control board).

1. Operation

a. Small size original exit operation

(1) Single-side original

Scanned original is conveyed to the reversal section since SD301 is OFF and the flapper is closed. Original conveyed to the reversal section is conveyed to the original exit gate by the reversal roller which is driven by M304. During this time, M304 drives the conveyance roller with low speed forward rotation. The original is conveyed to the original exit roller 2 since SD303 is OFF and the original exit gate is opened. M305 drives the original exit roller 2 with low speed forward rotation and ejects the

PGND

24VDC

MAIN BODY

5VDC

PS309

PS309 LED CONT

DF VALID

DF CTS

DF DTR

DF RXD

DF RTS

DF DSR

5VDC

PS304

PS304 LED CONT

DF TXD

PS314 PS313

5VDC

SGND

PS314

DFCB

PS313

PS313 LED CONT

24VDC

SD301 DRIVE

SD301 SD302 SD303

M305 M304

24VDC

SD302 DRIVE

M305 DRIVE B

M305 DRIVE A

24VDC

SD303 DRIVE

24VDC

M304 DRIVE B

M304 DRIVE A

24VDC

M301 DRIVE A

M301 DRIVE B

M301

24VDC

M304 DRIVE A

M301 DRIVE B

original to the original exit section (small) with the original surface facing down.

(2) Two-side original

A original that has been scanned on the back side is conveyed to the original exit gate in the same manner as single-side original. During this time, SD303 is ON and the original exit gate is closed. Therefore, the original is passed through the original exit reversal roller, which is driven by the low speed forward rotation of M305, and conveyed to the original exit reversal section. M305 turns OFF when PS313 ( original exit reverse detection) is turned OFF by the conveyed original. When SD303 turns OFF and the original exit gate opens, M305 starts high speed backward rotation after a predefined interval and reverses the direction of the conveyed original. Since the original exit gate is opened, the original is conveyed to the original exit section (small) rather than returning to the reversal section. As a result, the two-side original is ejected with the front side facing down.

RADF

2-9

+ 200 hidden pages