Konica Minolta DF-310 User Manual

SERVICE MANUAL

Model

DF-310

SEPTEMBER 1997

CSM-DF310

KONICA BUSINESS TECHNOLOGIES, INC.

IMPORTANT NOTICE

Because of the possible hazards to an inexperienced person servicing this equipment, as well as the risk of damage to the equipment, Konica Business Technologies strongly recommends that all servicing be performed by Konica-trained service technicians only.

Changes may have been made to this equipment to improve its performance after this service manual was printed. Accordingly, Konica Business Technologies, Inc., makes no representations or warranties, either expressed or implied, that the information contained in this service manual is complete or accurate. It is understood that the user of this manual must assume all risks or personal injury and/or damage to the equipment while servicing the equipment for which this service manual is intended.

Corporate Publications Department

© 1999, KONICA BUSINESS TECHNOLOGIES, INC. All rights reserved.

Printed in U.S.A.

CONTENTS
REVISION HISTORY ...........................................................	v
SAFETY PRECAUTIONS ..................................................	vii
LIST OF DIFFERENCES ....................................................	ix
DF-310 PRODUCT SPECIFICATIONS ..............................	1
EXTERNALS .......................................................................	2
CENTER CROSS-SECTIONAL DRAWING .......................	2
DRIVE SECTION ................................................................	3
PAPER FEED SECTION ....................................................	4
Composition ..................................................................	4
Mechanisms ..................................................................	4
Disassembly and Reassembly ......................................	5
Paper Feed Control .....................................................	11
CONVEYANCE SECTION ................................................	12
Composition ................................................................	12
Mechanisms ................................................................	12
Disassembly and Reassembly ....................................	13
Conveyance Control ....................................................	16
REVERSAL SECTION ......................................................	17
Composition ................................................................	17
Mechanisms ................................................................	17
Disassembly and Reassembly ....................................	18
Reversal/Exit Control ...................................................	18
ADJUSTMENTS ................................................................	20
DIAGRAMS .......................................................................	21
ELECTRICAL PARTS LAYOUT DRAWING ...............	21
CONNECTOR LAYOUT DRAWING ...........................	22
OVERALL WIRING DIAGRAM ....................................	23
CONTROL BOARD CIRCUIT DIAGRAM ....................	24
TIMING CHARTS ........................................................	26
(8.5X11, 1 SIDE ORIGINALS, 3 SHEETS SET) ....	26
(8.5X11, 2 SIDE ORIGINALS, 2 SHEETS SET) ....	26

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iv

REVISION HISTORY

MODEL DF-310

September 1997

There are no TECHNICAL BULLETINS issued for this model at this time.

The following SAFETY BULLETINS have been issued which either apply specifically to this model or address general safety. In addition to the safety bulletins, review the Safety Precautions section of this manual.

BULLETIN #	TITLE	DATE
11	Isopropyl Alcohol . . . . . . . . . . . . . . . . . . . . . . . . . . .	Incorporated 1st edition
14	Sharp Edges (All Models) . . . . . . . . . . . . . . . . . . . . . . .	Incorporated 1st edition
17A	Policy on Unauthorized Modifications (All Models) . . . . . . . . . .	Incorporated 1st edition
45	Installation Environment (All Models) . . . . . . . . . . . . . . . . .	Incorporated 1st edition

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vi

SAFETY PRECAUTIONS

Installation Environment

Safety considerations usually are directed toward machine design and the possibility of human error. In addition, the environment in which a machine is operated must not be overlooked as a potential safety hazard.

Most electrical equipment is safe when installed in a normal environment. However, if the environment is different from what most people consider to be normal, it is conceivable that the combination of the machine and the room air could present a hazardous combination. This is because heat (such as from fusing units) and electrical arcs (which can occur inside switches) have the ability to ignite flammable substances, including air.

When installing a machine, check to see if there is anything nearby which suggests that a potential hazard might exist. For example, a laboratory might use organic compounds which, when they evaporate, make the room air volatile. Potentially dangerous conditions might be seen or smelled. The presence of substances such as cleaners, paint thinners, gasoline, alcohol, solvents, explosives, or similar items should be cause for concern.

If conditions such as these exist, take appropriate action, such as one of the following suggestions.

∙Determine that the environment is controlled (such as through the use of an exhaust hood) so that an offending substance or its fumes cannot reach the machine.

∙Remove the offending substance.

∙Install the machine in a different location.

The specific remedy will vary from site to site, but the principles remain the same. To avoid the risk of injury or damage, be alert for changes in the environment when performing subsequent service on any machine, and take appropriate action.

Unauthorized Modifications

Konica copiers have gained a reputation for being reliable products. This has been attained by a combination of outstanding design and a knowledgeable service force.

The design of the copier is extremely important. It is the design process that determines tolerances and safety margins for mechanical, electrical, and electronic aspects. It is not reasonable to expect individuals not involved in product engineering to know what

effect may be caused by altering any aspect of the machine’s design. Such changes have the potential of degrading product performance and reducing safety margins.

For these reasons, installation of any modification not specifically authorized by Konica Business Machines U.S.A., Inc., is strictly prohibited.

The following list of prohibited actions is not all-inclu- sive, but demonstrates the intent of this policy.

∙Using an extension cord or any unauthorized power cord adapter.

∙Installing any fuse whose rating and physical size differs from that originally installed.

∙Using wire, paper clips, solder, etc., to replace or eliminate any fuse (including temperature fuses).

∙Removing (except for replacement) any air filter.

∙Defeating the operation of relays by any means (such as wedging paper between contacts).

∙Causing the machine to operate in a fashion other than as it was designed.

∙Making any change which might have a chance of defeating built-in safety features.

∙Using any unspecified replacement parts.

General Safety Guidelines

This copier has been examined in accordance with the laws pertaining to various product safety regulations prior to leaving the manufacturing facility to protect the operators and service personnel from injury. However, as with any operating device, components will break down through the wear-and-tear of everyday use, as will additional safety discrepancies be discovered. For this reason, it is important that the technician periodically performs safety checks on the copier to maintain optimum reliability and safety.

The following checks, not all-inclusive, should be made during each service call:

CAUTION: Avoid injury. Ensure that the copier is disconnected from its power source before continuing.

∙Look for sharp edges, burrs, and damage on all external covers and copier frame.

∙Inspect all cover hinges for wear (loose or broken).

∙Inspect cables for wear, frays, or pinched areas.

vii

∙Ensure that the power cord insulation is not damaged (no exposed electrical conductors).

∙Ensure that the power cord is properly mounted to the frame by cord clamps.

∙Check the continuity from the round lug (GND) of the power cord to the frame of the copier -- ensure continuity. An improperly grounded machine can cause an electrically-charged machine frame.

Safeguards During Service Calls

Confirm that all screws, parts, and wiring which are removed during maintenance are installed in their original positions.

∙When disconnecting connectors, do not pull the wiring, particularly on AC line wiring and high voltage parts.

∙Do not route the power cord where it is likely to be stepped on or crushed.

∙Carefully remove all toner and dirt adhering to any electrical units or electrodes.

∙After part replacement or repair work, route the wiring in such a way that it does not contact any burrs or sharp edges.

∙Do not make any adjustments outside of the specified range.

Applying Isopropyl Alcohol

Care should be exercised when using isopropyl alcohol, due to its flammability. When using alcohol to clean parts, observe the following precautions:

∙Remove power from the equipment.

∙Use alcohol in small quantities to avoid spillage or puddling. Any spillage should be cleaned up with rags and disposed of properly.

∙Be sure that there is adequate ventilation.

∙Allow a surface which has been in contact with alcohol to dry for a few minutes to ensure that the alcohol has evaporated completely before applying power or installing covers.

Summary

It is the responsibility of every technician to use professional skills when servicing Konica products. There are no short cuts to high-quality service. Each copier must be thoroughly inspected with respect to safety considerations as part of every routine service call. The operability of the copier, and more importantly, the safety of those who operate or service the copier, are directly dependent upon the conscientious effort of each and every technician.

Remember...when performing service calls, use good judgement (have a watchful eye) to identify safety hazards or potential safety hazards that may be present, and correct these problem areas as they are identified -- the safety of those who operate the copier as well as those who service the copier depend on it!

viii

LIST OF DIFFERENCES

This machinechange is based on the DF-306. It is indicated as the DF-310 in this manual in order to distinguish it from the DF-306.

forReason

FS-103A

FS-103

Classification

ix

Mechanisms

Classification		DF-306		DF-310	Reason for change
Paper feed	1. Original push pressure plate operation
section	•	Spring clutch + solenoid	•	DC motor + Photo sensor	• Improved reliabbility
Drive section	1. Drive motor
	•	DC mortor	•	Stepping motor
	•	One motor	•	Three motors (for Paper exit / Drive /
				converance)

2.Drive control

•Electromagnetic clutch + blake

• Stepping motor control foward and reverce.

x

DF-310

DF-310 PRODUCT SPECIFICATIONS

	Type		Machine Data
	Type:	ADF with original automatic	Power supply:		24 V/5 VDC (supplied from the main
		reversal function			body)
			Max power
	Functions		consumption:		90 VA
	Originals size:	11x17, 8.5x14, 8.5x11, 8.5x11R,	Weight:		Approximately 27.5 lb.
			Machine dimensions:
		8.5x5.5, 8.5x5.5R and 5.5x8.5R
		(All sizes can be detected by
		APS)
					617 mm
	Kinds of originals				24.3
	Ordinary paper	16 to 24 lb. fine quality paper
	Special paper	Paper feed and conveyance
		ability may sometimes be inferior			mm
		to those of 16 to 24 lb. fine quality
					20.6
		paper.			523
		The following kinds of paper
		cannot be used:
		* OHP film	mm
		* Blueprint masters		mm	mm
		* Label paper	7.6
				102.3	100
		* Offset masters	192.1
				4	3.9
		* Pasted originals
					inches

			Original	4. Maintenance
Curling
				Maintenance:	Same as the main body

5. Operating Environment

Temperature:	50°F to 91°F
Humidity:	20% to 80%RH

Note: The contents of this manual may be changed without prior notice for the sake of improvement.

Original curling:		Max 10 mm
Max number of
Stacked originals:		50 (22 lb.)
Original conveyance speed:
	Mode	Original size	Feed speed
	One-sided original
	to	8.5x11	60sheets/
	One-sided copy		minute

1

CENTER CROSS-SECTIONAL DRAWING

			Feed roller		Switching guide
		Paper feed		Paper exit roller
		roller
				Resistration drive
				roller
	Original
	paper feed	Double feed			Conveyance roller
	tray			Conveyance belt
		prevention
		roller	Resistration
			driven roller
				Drive roller
	EXTERNALS

Original protection cover

Original paper feed tray

Paper exit cover

2

DF-310

DRIVE SECTION

Driven roller

Conveyance roller

Conveyance belt

Drive roller

Paper exit motor

(M303)

Regist drive roller

Conveyance motor

(M302)

Original push

pressure plate

Paper feed motor

(M301)

Double feed

prevention roller

Feed roller

Push pressure motor

(M304)

3

PAPER FEED SECTION

Composition

Conveyance motor Original push (M302)

pressure plate

Drive motor (M301)

	Push pressure motor (M304)
Mechanisms
Mechanism	Method
Paper feed	Stack automatic feed (upward
	feed)
Double feed prevention	Double feed prevention roller
Original size detection	Original passage time detection
	method
	(Size detected by the number of
	count pulses from PS302.)

Paper Feed Drive Section

The drive section performs the following kinds of control when originals are being fed.

Original push pressure plate pressing and release operations

The drive force from the push pressure motor (M304) is transferred to the swing lever via the lifting cam.

The swing lever is mounted on the original push pressure plate. The drive force from the swing lever causes the original push pressure plate to move up and down. As a result, the original push pressure plate alternately pushes against and separates from the original in the original paper feed tray. The push pressure spring maintains the paper feed pressure constant.

4

				DF-310
Control of the paper feed roller
The paper feed roller is controlled by the paper feed motor
(M301).				Hinge retaining
When the paper feed motor rotates in the forward direction, the				plate
drive force is transmitted to the paper feed roller and the feed
roller via the paper feed drive shaft, causing pre-paper feed to
take place.			Set screws	Set screws
Control of the resistration roller
The resistration roller is controlled by the paper feed roller
(M301). When pre-paper feed takes place, the paper feed
roller rotates in reverse, and the drive force is transmitted to the
resistration drive roller and the resistration driven roller via the
resistration drive roller shaft, causing paper feed to take place.
	Resistration driven roller
			(6) Reinstall the above parts in the opposite sequence to
			removal.
			Adjustment
			(1) Loosen the four set screws of the hinge retaining plate.
Original push		Paper feed		Hinge retaining plates
pressure plarte
		motor (M301)
	Push pressure
	motor (M034)
Disassembly and Reassembly
Removing and Reinstalling the ADF
Caution: Be sure that the power cord has been
	unplugged from the power outlet.
Procedure			Set screws	Set screws
(1)	Remove the rear main body cover.
(2) Disconnect the ADF connector (CN102) from the back
	of the machine.
(3) Remove the set screw, then remove the original paper
	feed tray.
(4)	Open the ADF 90°, then remove the two set screws
	from each of the left and right hinges.
(5)	Remove the hinge retaining plate, then remove the
	ADF.

5

(2)Open the RADF unit and set the two jig (ADF positioning block) to the positioning piece (front, rear).

	ADF	Positioning
	positioning
		piece
	blocks
		(front,rear)

ADF positioning block

(3)Close the RADF unit slowly and move the RADF unit right and left, until the jig comes into contact with the end of the scale plate.

RADF

ADF positioning

block

Scale plate

Front of main body

(4)Oplen the RADF unit slowly and tighten the four set screws of the hinge retaining plate after removing the jig.

(5)When the RADF unit is closed, place the two jig (spacer/A) onto the platen glass opposite to the positioning piece (rear) and the protrusion (rear).

Positioning	Protrusion (rear)
piece (rear)

Jig (spacer/A)

Jig (spacer/A)

6

DF-310

(6)Close the RADF unit slowly.

(7)Loosen the four height adjustment screws.

Height adjustment screws

(8)Tighten the four height adjustment screws in a state that press the RDF unit down, and the positoning piece (rear) and the protrusion (rear) comes to the end of the jig.

Height adjustment screw

(9) Open the RADF unit and remove the jig.

Check

Clearance between position piece (left side - front) and platen glass of the RADF unit.

Standard: less than 0.1mm

(1)Put the two sheet of the copy paper (80g/m2, 200mm x 20mm) between positioning piece (left side - front) and, and pull them.

(2)If they are pull lightly, since the clearance is too big, readjust the height.

Positioning piece (left side - front)

Less than 0.1mm

Platen glass

Clearance between the platen glass and the protrusion (right side - front) of the RADF unit.

Standard: less than 0.6mm

(1)Check that the clearance is less than 0.6 mm with a visual inspection.

7

Replacing the Paper Feed Rubber and Feed

Rubber

Procedure

(1)Remove the four set screws, then remove main body base plate (A).

(2)Disconnect the relay connector.

Set screws

Main body base plate (A)

Set screws

Relay connector

(3)Remove the four set screws and remove the paper feed guide plate (lower) assembly.

Set screws

Set screws

Paper feed

guide plate

(lower)

assembly

(4)Remove the two set screws and remove the feed roller assembly.

Set screw

Set screw

Feed roller assembly

(5)Remove the stop ring, then remove the one-way clutch.

(6)Remove the two stop rings.

Stop rings

one-way clutch

Stop ring

8