Konica 7065 GUIDE MANUAL d312e
DF-312
SERVICE HANDBOOK
Jan. 2000
Ver. 2.0
KONICA CORPORATION
TECHNOLOGY SUPPORT CENTER
TOKYO JAPAN
CONTENTS
SAFETY AND IMPORTANT WARNING ITEMS.. .............
Refer to the 7065 service handbook on page C-1
1. DF-312
DF-312 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 DRAWING ...................................... 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 copy mode .............................. 1-4
EXTERNAL SECTION ............................................... 1-5
[1] Composition ................................................... 1-5
[2] Mechanism..................................................... 1-5
[3] Disassembly and Re-assembly...................... 1-6
PAPER FEED/PAPER EXIT SECTION ..................... 1-9
[1] Composition ................................................... 1-9
[2] Mechanism..................................................... 1-9
[3] Disassembly and Re-assembly.................... 1-10
[4] Paper feed/conveyance/scan control........... 1-12
[5] Paper exit/reversal conveyance control ....... 1-14
[6] Original size detection control ...................... 1-16
CONTENTS
2. DIAGRAMS
DF-312 ELECTRICAL PARTS LAYOUT DRAWING . 2-1
DF-312 CONNECTOR LAYOUT DRAWING ............. 2-2
DF-312 OVERALL WIRING DIAGRAM...................... 2-3
DF CONTROL BOARD CIRCUIT DIAGRAM (1/2) .... 2-4
DF CONTROL BOARD CIRCUIT DIAGRAM (2/2) .... 2-5
DF-312 TIMING CHART (A4, ONE SIDE ORIGINALS,
FIVE SHEETS)........................................................... 2-6
DF-312 TIMING CHART (A4, DUAL-SIDED
ORIGINALS, TWO SHEETS) ..................................... 2-6
This section covers the structure, functions, operation and method of
disassembling and assembling the machine.
Observe the following precautions when performing disassembly and
assembly work.
1. Be sure to unplug the power cord before working on the machine.
2. Perform all reassembly work by reversing the order in which the
component was disassembled, unless otherwise specified.
3. Do not lose small parts (screws, etc.) or insert them in the wrong
place.
4. Install all parts completely before operating the machine.
5. Do not loosen the screws indicated as disallowed for removal.
1
DF-312
DF-312 PRODUCT SPECIFICATIONS
DF-312
[1] Type
Type: Sheet-through type reversible DF
[2] Functions
Originals size: A3, B4, A4, A4R, B5, B5R, B6R,
8.5 x 11
· All sizes are detected
automatically.
· Mixing of original sizes
possible.
Kinds of originals
Ordinary paper: 50 - 130 g/m
Special paper: Paper feed and conveyance abil-
ity may sometimes be inferior to
those of 50 to 130 g/m
ity paper.
The following kinds of paper cannot be used:
· OHP film
· Blueprint masters
· Label paper
· Offset masters
· Pasted originals
Original curling: Less than 10 mm Max.
2
fine quality paper
2
fine qual-
[3] Machine Data
Power source: 24 V DC / 5 V (supplied from the main
body)
Max. power consumption:
Less than 120 VA
Weight: Approx. 14.5 kg
Machine dimensions :
Unit: mm
570
590
150
Original
Curling
Maximum number of stacked originals:
50 sheets Max. (80g/m
Original read speed (copies per minute)
Mode
Single-sided
original to Single-
sided copy
Dual-sided original
to duplex copy
Original feed layout: Face-up setting, centered, U-turn
Original size
A4
A4
feed/straight paper exit, reversal
section mounted at paper exit
side.
2
)
Feed speed
65
38
[4] Maintenance
Maintenance: Same as the main body
[5] Operating Environment
Temperature: 10°C ~ 30°C
Humidity: 10% to 80%RH
Note: The contents of this manual may be changed without
prior notice.
Original image read position:
At the slit glass section
1 - 1
DF-312
CENTER CROSS-SECTIONAL DRAWING
Registration roller
Conveyance roller
Original
image read
Slit glass
position
Separation roller
Pressure pulley
Reversal roller
Paper exit roller
Paper feed roller
DRIVE SYSTEM DRAWING
Paper feed tray
Original conveyance
motor (M301)
Original feed CL
(CL302)
Original pick-up CL
(CL301)
Conveyance roller
Original feed motor
(M302)
Separation roller
Paper feed roller
Registration roller
Pressure pin
Paper exit roller
1 - 2
ORIGINAL CONVEYANCE PROCESS
DF-312
As the figure below shows, the DF-312 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-312 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
PS306 (original registration) goes on.
When PS306 goes on, pre-feed is carried out by the registration roller and the original is conveyed to the conveyance roller
at high speed. When PS308 (Original conveyance) detects the
leading edge of the original, the conveyance roller switches to
scanning speed and conveys the original to the slit glass.
If there is next original at this time, pre-feed is carried out.
Registration roller
PS308
(Original conveyance)
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
Conveyance roller
PS306
(Original registration)
Registration roller
Separation roller
Paper feed roller
PS306 (Original registration)
1 - 3
Slit glass
Paper exit roller
Flapper
DF-312
[2] Double side original copy mode
(double side to single side copy, double side
to double side copy)
The original conveyance operation until the start of scanning
for the front side of the 1st double side original is the same as
that of 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 PS309 (original reversal) 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
Pressure pulley
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
When 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 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.
Slit glass
Reversal roller
PS309 (Original reversal)
When 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 PS308 (Original
conveyance) at high speed.
When PS308 detects the leading edge of the original, the
conveyance roller switches back to scanning speed and conveys the original to the slit glass for the original to be scanned.
Flapper
PS308 (Original
conveyance
PS309 (Original reversal)
Pressure pulley
Reversal roller
Next original
Flapper
PS309 (Original reversal)
Paper exit roller
Reversal roller
[3] Mixed original copy mode
The mixed original copy mode can handle both the same series
and different series of originals.
The size of the original in the conveyance direction is determined by the ON time of PS306, size detection operation take
place prior to the scanning operation.
The original then stops at the scanning standby position. The
subsequent operations are the same for all copy modes.
For details on the size detection operation, refer to Paper Feed/
Paper Eject section “[6] Original Size Detection Control”.
1 - 4
EXTERNAL SECTION
[1] Composition
Open/close
cover
DF-312
Paper feed tray
Paper exit section
[2] Mechanism
Mechanisms
Jam clearance
∗ 1
Open/close cover
Release knob
Conveyance guide open/close lever
Pressure release lever
Platen guide
∗1: Jam clearance
If a paper jam occurs during the feed process, open the open/
close cover, raise the conveyance guide open/close lever, and
rotate the release knob to remove the jammed original.
Open/close cover
Release knob
Methods
Conveyance
guide open/close
lever
If the jammed original is hard to remove, operate the pressure
release lever to remove the pressure of the separation roller,
and then remove the original.
Separation roller
Pressure release lever
Conveyance guide
1 - 5
DF-312
If a paper jam occurs during the reversal process, the jammed
original can be removed by opening the platen guide.
Lock
Platen
guide
[3] Disassembly and Re-assembly
1. Removing and Re-installing the Paper Dust
Removing Pad
Caution: Be sure that the power cord has been un-
plugged from the power outlet.
a. Procedure
(1) Open the open/close cover.
(2) Remove the set screw, then remove the paper dust
removing pad.
2. Removing the RADF
Caution: Be sure that the power cord has been un-
plugged from the power outlet.
a. Procedure
(1) Remove the rear cover.
(2) Remove the set screw, then remove the connector cover.
(3) Remove the two connectors (CN100, CN102).
(4) Remove the two set screws, then withdraw the cable from
the main body.
Cable
Connector
(CN102)
Connector
(CN100)
Connector
cover
Set screws
Set screw
Paper dust removing pad
Set screw
(3) Re-install the paper dust removing pad in the opposite
sequence to removal.
(5) Remove the set screw from each, then remove the two
stoppers.
(6) Remove the two set screws from each, then remove the
two fixing plates.
Stopper
Set
screws
Set screw
Fixing
plate
1 - 6
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