Konica 7075 GUIDE MANUAL d313e
DF-313
SERVICE HANDBOOK
Dec. 1999
Ver. 1.0
KONICA CORPORATION
TECHNOLOGY SUPPORT CENTER
TOKYO JAPAN
CONTENTS
CONTENTS
SAFETY AND IMPORTANT WARNING ITEM ....................
Refer to the 7075 service handbook on page C-1
1. OUTLINE
DF-313 PRODUCT SPECIFICATIONS................... 1-1
[1] Type ............................................................ 1-1
[2] Functions ....................................................1-1
[3] Machine Data.............................................. 1-1
[4] Maintenance ...............................................1-1
[5] Operating Environment ............................... 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)........ 1-4
[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] Mechanism..................................................2-1
ORIGINAL FEED/CONVEYANCE/EXIT
SECTION ................................................................ 2-3
[1] Composition ................................................ 2-3
[2] Mechanisms................................................ 2-3
[3] Original Feed/Conveyance/Scan Control....2-5
[4] Original Reversal and Conveyance
Control ........................................................2-8
[5] Original Exit Control .................................. 2-10
[6] Original Size Detection Control................. 2-12
3. DISASSEMBLY/ASSEMBLY
EXTERNAL SECTION ............................................ 3-1
[1] Removing the RADF ................................... 3-1
[2] Reinstalling the RADF.................................3-2
ORIGINAL FEED/CONVEYANCE/EXIT
SECTION ................................................................ 3-5
[1] Removing/Cleaning/Reinstalling the Original
Feed Roller Unit .......................................... 3-5
[2] Cleaning the Cleaning Pad ......................... 3-5
[3] Replacing the Original Feed Roller/Separa-
tion Roller/Auxiliary Separation Roller ........3-6
[4] Cleaning the Paper Separation Rubber ......3-8
[5] Replacing the Double Feed Prevention
Roller/Torque Limiter ..................................3-8
[6] Cleaning Photo Sensors/Mirrors for Photo
Sensors....................................................... 3-9
1
OUTLINE
1 OUTLINE
DF-313 PRODUCT SPECIFICATIONS
DF-313
[1] Type
Type:
Sheet-through type reversible DF
[2] Functions
Original size:
A3R, B4R, A4, A4R, B5, B5R, A5, A5R, 11x 17R,
8.5 x11, 8 x13
• All sizes are detected automatically.
• Mixing of original sizes possible.
Original type
Plain original:
50 - 130 g/m2 fine quality paper.
Special original:
Original feed and conveyance ability may be inferior to those of 50 to 130 g/m2 fine quality original.
Only SDF mode single-sided passage allowed
for 131 to 200 g/m2 thick original and bonded
original.
The following types of original cannot be used:
• OHP film
• Blueprint masters
• Label original
• Offset masters
Original curling:
10 mm maximum
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:
24V DC/5V (supplied from the main unit)
Max. power consumption:
Less than 120VA
Weight:
Approx. 20 kg
Machine dimensions:
570
650
170
1 OUTLINE
unit:mm
Original
Curling
Maximum number of stacked originals:
100 sheet maximum (80g/m2)
Original read speed (copies per minute)
Mode Original Feed
size speed
Single-sided original A4 75
Dual-sided original A4 50
[4] Maintenance
Maintenance:
Same as the main unit
[5] Operating Environment
Temperature:
10°C to 30°C (50°F to 86°F)
Humidity:
10% to 80%RH
Note: The contents of this manual may change
without prior notice.
1 - 1
DF-313
CENTER CROSS-SECTIONAL DRAWING
1 OUTLINE
Double feed
Registration roller
Original
conveyance
roller
prevention roller
Separation roller
Original feed roller Original feed tray
Original exit
roller 1
Original exit
tray (for largesize original)
Original exit
section (for smallsize original)
Slit glass
Read position
Flapper
Reversal roller
Reversal
conveyance roller 1
Reversal conveyance roller 2
Original exit gate
Original exit
roller 2
Original exit reversal
roller
1 - 2
DRIVE SYSTEM DIAGRAM
DF-313
FRONT
Original
feed roller
Registration roller
Original exit gate SD
(SD303)
Flapper drive
SD (SD 301)
Separation roller
Original conveyance roller
SDF switching SD
(SD304)
Tray up/down drive
motor (M303)
1 OUTLINE
Original conveyance motor
(M301)
Flapper
Original feed motor
(M302)
Original exit
roller 2
Original exit motor 2
(M305)
Original exit reversal
roller
Pressure roller release SD (SD302)
FRONT
Original exit gate
Original exit roller 1
Reversal roller
Original exit motor 1
(M304)
1 - 3
Reversal conveyance roller
DF-313
ORIGINAL CONVEYANCE PROCESS
1 OUTLINE
The DF-313 consists of a original feed section, conveyance section, reversal section, original exit reversal section,
original exit tray (large), and original exit tray (small).
Original conveyance
section
Original reversal
section
Slit glass (Read section)
The original placed faced up on the original feed tray
is fed from the topmost original. The f ed original is not
conveyed to the original glass. Instead, it is read when
it passes the slit glass placed in the conveyance path.
Original feed section
PS306
(Original
registration detection)
Original exit tray
Original exit tray (small)
Original exit reversal
section
Separation roller
Original feed
roller
The DF-313 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.
[1] Single side original copy mode
(large)
(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.
Registration roller
1 - 4
DF-313
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.
PS308
(Original conveyance
detection)
Registration roller
1 OUTLINE
Slit glass
Slit glass
Original conveyance roller
Next original
Original exit roller 1
Flapper
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).
1 - 5
DF-313
1 OUTLINE
[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 re versal unit b y 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.
Flapper
Reversal roller
Original reversal
section
Original exit gate
Original exit roller 2
1 - 6
DF-313
[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 f ed to the re versal unit does not fit in the re v ersal unit so the original e xit gate opens
to feed it to the original exit reversal section.
1 OUTLINE
Flapper
Reversal roller
Original exit gate
When PS309 (original reversal detection) 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.
PS309
(Original reversal
detection)
Reversal roller
Original exit reversal roller
The original that has completed scanning of the
back side is fed inside the re versal 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).
Reversal roller
Flapper
Pressure roller
1 - 7
Flapper
Original exit roller 1
DF-313
1 OUTLINE
[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.
PS313
(Original exit reverse detection)
Reversal roller
Original exit gate
Original exit reversal roller
1 - 8
DF-313
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.
PS313
(Original exit reverse detection)
Original exit roller 2
1 OUTLINE
Original exit gate
Original exit reversal roller
[5] Mixed original copy mode
The mixed original copy mode supports both the same series originals and different series originals. Ho wever ,
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.
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