Konica 7045 GUIDE MANUAL df315e

DF-315

SERVICE HANDBOOK

Sep. 2000

Ver. 1.0

KONICA CORPORATION

TECHNOLOGY SUPPORT CENTER

TOKYO JAPAN

CN55YF1300

CONTENTS

SAFETY AND IMPORTANT WARNING ITEMS .............

Refer to the 7045 service handbook on page C-1

1. OUTLINE

DF-315 PRODUCT SPECIFICATIONS .................. 1-1

CENTER CROSS-SECTIONAL VIEW ................... 1-2

DRIVE SYSTEM DIAGRAM ................................... 1-2

ORIGINAL CONVEYANCE PROCESS ................. 1-3

[1] Single Side Original Copy Mode ................ 1-3

[2] Double Side Original Copy Mode ............... 1-4

[3] Mixed Original/Z-Fold Original Mode ......... 1-5

2. UNIT EXPLANATION

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

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

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

PAPER FEED/PAPER EXIT SECTION ................. 2-3

[1] Composition ............................................... 2-3

[2] Mechanisms ...............................................2-3

[3] Paper Feed/Conveyance/Scan Control ..... 2-5

[4] Paper Exit/Reverse Conveyance Control ....2-8

[5] Original Size Detection Control ...............2-10

3. DISASSEMBLY/ASSEMBLY

DISASSEMBLY AND REASSEMBLY .................... 3-1

[1] Removing and Reinstalling

the Paper Dust Removing Pad .................. 3-1

[2] Removing the RADF .................................. 3-1

[3] Reinstalling the RADF ................................ 3-3

[4] Removing and Reinstalling

the Paper Feed Roller/Separation Roller ... 3-5 [5] Removing and Reinstalling the Double Feed

Prevention Pad .......................................... 3-6

1 OUTLINE

2 UNIT EXPLANATION

3 DIS./ASSEMBLY

1 OUTLINE

2 UNIT EXPLANATION

3 DIS./ASSEMBLY

Blank page

OUTLINE

1 OUTLINE

2 UNIT EXPLANATION

3 DIS./ASSEMBLY

1 OUTLINE

2 UNIT EXPLANATION

3 DIS./ASSEMBLY

Blank page

DF-315 PRODUCT SPECIFICATIONS

DF-315

1. Type

Type: Sheet-through type

reversible DF

2. Functions

Originals size: A3, B4, A4, A4R, A5, A5R,

B5, B5R, 8.5 x 11, 8 x 13, (for Europe), 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, A4R (for U.S.A)

• Double sided copy of A5 originals is not possible.

• All sizes are detected automatically.

• Mixing of original sizes possible.

Kinds of originals Ordinary paper: 50 - 130 g/m

paper

Special paper: Paper feed and conveyance

ability may sometimes be inferior to those of 50 to 130

g/m

fine quality paper. The following kinds of paper cannot be used:

• OHP film

• Blueprint masters

• Label paper

• Offset masters

• Pasted originals

fine quality

Original read speed (copies per minute)

Mode

Single-sided

original to Single-

sided copy

Dual-sided original

to duplex copy

Original image read position: At the slit glass section

Original size

Feed speed

3. Particulars of Machine

Power source: 24 V DC / 5 V

(supplied from main body)

Max. power consumption: Less than 120VA

Weight: Approx. 14 kg

Machine dimensions : Width 590mm

Depth 570mm Height 150mm

4. Maintenance and Life

Maintenance: Same as the main body

Machine life: Same as the main body

5. Operating Environment

Temperature: 10°C to 30°C

Humidity: 10% to 80%RH

Note: The contents of this manual may be changed

without prior notice.

1 OUTLINE

2 UNIT EXPLANATION

3 DIS./ASSEMBLY

Maximum number of stacked originals: 50 sheets (80g/m

Original curling: 10 mm Max.

Curling

Original

)

1-1

DF-315

CENTER CROSS-SECTIONAL VIEW

1 OUTLINE

Separation roller

Registration roller

Conveyance roller

2 UNIT EXPLANATION

Double feed prevention pad

Pressure pulley

Reversal roller

Paper exit roller

Slit glass

Original image read position

3 DIS./ASSEMBLY

DRIVE SYSTEM DIAGRAM

Paper feed roller

Paper feed tray

Original conveyance motor (M301)

Original feed motor (M302)

Separation roller

Original feed CL (CL302)

Paper feed roller

Original pick-up CL (CL301)

Registration roller

Conveyance roller

Paper exit roller

1-2

ORIGINAL CONVEYANCE PROCESS

DF-315

As the figure below shows, the DF-315 is composed of the paper feed section, conveyance section, reversal section and paper exit section.

Conveyance section

Reversal section

Slit glass (Read section)

The originals, which have been placed in the paper feed tray with the front side facing up, are fed starting with the topmost original. Originals that are fed are not conveyed to the original glass. Reading is carried out as the original passes by the slit glass section set midway through the conveyance path.

The operational modes of the DF-315 include three modes: (a) single side original copy mode, (b) double side original copy mode, (c) mixed original copy mode. The conveyance path is different for each mode.

Paper feed section

Paper exit section

[1] Single Side Original Copy Mode

(single side to single side copy, single side to double side copy)

The originals set in the paper feed tray are fed by means of the paper feed roller and separation roller to the position where original registration PS (PS306) goes on.

Separation roller

Registration roller

Original registration PS

When original registration PS goes on, pre-feed is carried out by the registration roller and the original is conveyed to the conveyance roller. The conveyance roller conveys the original to the position where original feed detect PS (PS308) goes on. The original stops at the scanning standby position.

Registration roller

Paper feed roller

1 OUTLINE

2 UNIT EXPLANATION

3 DIS./ASSEMBLY

1-3

Conveyancec roller Scanning standby position

Original feed detect PS

Original registration PS

1 OUTLINE

2 UNIT EXPLANATION

DF-315

When scan is started, the conveyance roller rotates again in the forward direction to convey the original. If there is another original at this time, pre-feed is carried out.

Reading of the original is carried out when the original passes over the slit glass. Originals which have been read are conveyed around the circumference of the conveyance roller by closing of the flapper and are ejected to the paper exit section via the paper exit roller.

Next original

[2] Double Side Original Copy Mode

(double side to single side copy, double side to double side copy)

The conveyance operation from feeding of the double sided original to the front side scanning standby position is the same as that for the single side original copy mode.

When scanning starts and reading of the front side is completed, the original is conveyed to the reversal section when the flapper opens and the paper exit path is blocked.

When original reverse detect PS (PS309) detects the leading edge of the original that has been conveyed to the reversal section and goes ON, pressure is applied to the pressure pulley. As a result, the reversal roller and pressure pulley clasp the original on both sides and convey it to the inside of the reversal section.

Flapper

Paper exit roller

3 DIS./ASSEMBLY

Slit glass

Flapper

Slit glass

Pressure pulley

Reversal roller

Original reverse detect PS

1-4

DF-315

When original reverse detect PS (PS309) detects the trailing edge of the original and goes OFF, the reversal roller rotates in the reverse direction to feed the original from the reversal section to the conveyance roller. Since the original passes over the top of the flapper at this time, the front and back sides are reversed and the original is sent to the conveyance roller. The conveyance roller conveys the original to the scanning standby position.

Flapper Pressure pulley

Scanning standby position

Original reverse detect PS

Reversal roller

When original reverse detect PS detects the trailing edge of the original and goes OFF, the reversal roller rotates in the reverse direction to feed the original from the reversal section to the conveyance roller. Since the flapper is closed at this time, the original is conveyed along the flapper and is ejected to the paper exit section via the paper exit roller.

Next original

Flapper

Original reverse detect PS

Paper exit roller

Reversal roller

1 OUTLINE

2 UNIT EXPLANATION

3 DIS./ASSEMBLY

When scanning of the back side starts, the flapper is opened. As a result, the original which has been read is conveyed to the inside of the reversal section again.

Flapper

[3] Mixed Original/Z-Fold Original Mode

In the mixed original mode (can handle both same series and different series of originals) and the Z-fold original mode, the original size in the sub-scanning direction is determined by to the ON time of original registration PS (PS306), hence size detection takes place before the scanning operation. This operation takes place for all originals in the mixed original mode, and only for the first original in the Z-fold original mode.

After size detection is completed, the original stops at the scanning standby position. The subsequent operations are the same for all copy modes. For details of the size detection process, refer to [5] "Original Size Detection Control" in "PAPER FEED/ PAPER EXIT SECTION".

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