Konica Minolta DF-217 User Manual

SERVICE MANUAL

Model

DF-217

Used on models 7115/7118

DECEMBER 2001

CSM-DF217

KONICA BUSINESS TECHNOLOGIES, INC.

DF-217

SERVICE MANUAL

DECEMBER 2001

Used on Konica Models 7115/7118

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

© 2001, KONICA BUSINESS TECHNOLOGIES, INC. All rights reserved.

Printed in U.S.A.

			CONTENTS
GENERAL, MECHANICAL/ELECTRICAL
1.	SPECIFICATIONS ...........................................................................................			M-1
2.	EXTERIOR VIEW ............................................................................................			M-2
3.	CROSS-SECTIONAL VIEW ............................................................................			M-3
4.	DRIVE SYSTEM ..............................................................................................			M-4
5.	ELECTRICAL COMPONENT LAYOUT ...........................................................			M-5
6.	MODES		............................................................................................................	M-6
	6-1. Standard ........................................................................................Mode			M-6
	6-2. Mixed ................................................................Original Detection Mode			M-6
7.	TAKE-UP ........................................................................................SECTION			M-7
	7-1. Document ..............................................Take-Up and Feed Mechanism			M-7
	7-2. Document ...........................................................Separating Mechanism			M-8
8.	TRANSPORT/EXIT ...................................................................MECHANISM			M-9
	8-1. Document .............................................................Transport Mechanism			M-9
	8-2. Document ......................................................................Exit Mechanism			M-10
9.	OTHER ........................................................................................FEATURES			M-11
	9-1. Document .....................................................Size Detection Mechanism			M-11
	9-2. Raised/Lowered .....................................Position Detection Mechanism			M-11
DIS/REASSEMBLY, ADJUSTMENT
1.	MAINTENANCE ..........................................................................SCHEDULE			D-1
2.	DISASSEMBLY ...............................................................................................			D-2
	2-1. Removal ...............................................................of the Exterior Covers			D-2
	2-2.	Removal .......................................of the Pick-Up Roller/Take-Up Roller		D-3
	2-3.	Removal .............................................................of the Separator Roller		D-4
	2-4.	Cleaning .................................................of the Registration Roller/Rolls		D-4
	2-5.	Cleaning ..............................................................of the Exit Roller/Rolls		D-5
3.	ADJUSTMENT .................................................................................................			D-6
	3-1. Adjust ...............................................................Mode Setting Procedure			D-6
	3-2. Height ...................................................................................Adjustment			D-6
	3-3. Leading ..............................................................Edge Skew Adjustment			D-7
	3-4. Zoom ......................................Adjustment and Registration Adjustment			D-8
		(1) .............................................................FD Zoom Ratio Adjustment		D-8
		(2) ............................................................	CD Registration Adjustment	D-9
		(3) .............................................................	FD Registration Adjustment	D-10
TECH. REP. MODE
1.	TECH. REP. .........................................................................................MODE			S-1
	1-1. Tech. .......................................................Rep. Mode Setting Procedure			S-1
	1-2. ADF .................................................................Document Passage Test			S-1
	1-3. ADF .......................................................................Original Glass Check			S-1
TROUBLESHOOTING
1.	MISFEED DETECTION TIMING AND MISFEED TROUBLESHOOTING
	PROCEDURES ...............................................................................................			T-1
	1-1.	Misfeed ........................................................................Detection Timing		T-1
	1-2.	Misfeed ......................................................Troubleshooting Procedures		T-2

iii

iv

SAFETY PRECAUTIONS

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 equipment has 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 equipment 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 equipment 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 equipment 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 equipment 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.

v

SAFETY PRECAUTIONS

∙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 piece of equipment 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 equipment, are directly dependent upon the conscientious effort of each and every technician.

Remember...when performing service calls, use good judgment (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 equipment as well as those who service the copier depend on it!

vi

GENERAL,

MECHANICAL/ELECTRICAL

1.SPECIFICATIONS

Name	: Automatic Document Feeder
Installation	: Inserted in top portion in the rear of copier
Type of Document	: Plain paper (Standard: 50 to 110g/m2 or 13-1/4 to 29-1/4 lbs.,
		Mixed Original: 60 to 90 g/m2 or 16 to 24 lbs.)
Detectable Document	: Metric Areas:A5R, B5/B5R, A4/A4R, B4R, A3R, 11 × 8-1/2,
Size		8-1/2 × 11R, F4
	Inch Areas:5-1/2 × 8-1/2R, 11 × 8-1/2, 8-1/2 × 11R,
		8-1/2 × 14R, 11 × 15, 11 × 17
Capacity	: 50 sheets max. (80 g/m2)
Document Alignment	: Center
Document Loading	: Face up
Document Exchange	: 15 sheets/min. (A4)
Speed	18 sheets/min. (A4)
Modes	: Standard
	Mixed Original (only for originals with the same width)
Power Requirements	: DC24 V, DC5 V (supplied from the copier)
Max. Power Consumption	: 36 W or less
Dimensions	: Width: 602 mm or 23-3/4
	Depth: 502 mm or 19-3/4
	Height: 101 mm or 4
Weight	: 5.5 kg or 12-1/4 lbs.
Operating Environment	: Same as copier
Type of Originals Not
Guaranteed for Reliable
Feeding
Type of Original			Possible Trouble
Sheets stapled or clipped together			Take-up failure, damaged sheet, defective
			drive mechanism due to jammed staples or
			clips.
Sheets glued together			Take-up failure, damaged sheet
Sheets folded, torn, or wrinkled			Take-up failure, damaged sheet
Sheets severely curled			Sheets misfeed due to being dog-eared or
			fed in askew

M-1

2.EXTERIOR VIEW

1

2

3

4

4688M507CA

1.	Take-Up Cover	3.	Document Loading Tray
2.	Rear Cover	4.	Document Edge Guide

M-2

3.CROSS-SECTIONAL VIEW

1

2

3

8

7

6

5

4

4688M504CA

1.	Take-Up Roller	5.	Registration Rollers
2.	Pick-Up Roller	6.	Registration Rolls
3.	Exit Rollers	7.	Transport Rolls
4.	Exit Rolls	8.	Separator Roller

M-3

4.DRIVE SYSTEM

1

6

2

3

5

4

4688M502AA

1.	Main Motor	4.	Registration Rollers
2.	Pick-Up Roller	5.	Take-Up Roller
3.	Exit Rollers	6.	Take-Up Clutch

M-4

5.ELECTRICAL COMPONENT LAYOUT

	PC12	PC9
		PC8
	PWB	PC6
	PC11	PC7
	PC1
CL1	PC10
	PC4 PC2
	PC5
	PC3
			4688M505CA
Symbol	Name	Symbol	Name
PWB	Interface Board	PC5	Paper Exit Sensor
M1	Main Motor	PC6	Length Size Detection Sensor 1
CL1	Paper Take-Up Clutch	PC7	Length Size Detection Sensor 2
PC1	Take-Up Cover Open/Close	PC8	Length Size Detection Sensor 3
	Detecting Sensor	PC9	Length Size Detection Sensor 4
PC2	Paper Empty Sensor	PC10	Width Size Detection Sensor 1
PC3	Registration Sensor	PC11	Width Size Detection Sensor 2
PC4	Separator Sensor	PC12	Width Size Detection Sensor 3

PC9: Inch area only

PC10: Metric area only

M-5

6.MODES

6-1. Standard Mode

•When a multi-page document is being copied, the copier detects the size of only the first page of the document and copies the subsequent pages based on that size detection.

•This saves the copier the time required for detecting the sizes of the subsequent pages of the document, making for faster paper feed timing.

6-2. Mixed Original Detection Mode

•The copier detects the size of each page of the document and, according to the size detected, feeds the paper of the corresponding size selected from among the available paper sources for making copies.

•This mode is used when making copies from a document set consisting of pages of varying length, but of the same width.

M-6

7.TAKE-UP SECTION

7-1. Document Take-Up and Feed Mechanism

•The document is taken up as the Pick-Up Roller and Take-Up Roller turn.

•The Pick-Up Roller transports the document up to the Take-Up Roller.

•After a scan is completed, the Main Motor is turned backward to raise the Pick-Up Roller.

•The Pick-Up Roller and the Take-Up Roller are turned through the Paper Take-Up Clutch and by a gear train and a belt driven by the Main Motor.

•The Paper Empty Sensor is used to detect a document loaded on the Document Loading Tray.

•The Document Stoppers determine the leading edge position of the document loaded on the Document Loading Tray. They are in the lowered, swung-down position in the standby state and swing upward when the document is to be taken up.

•The swing-up and swing-down motion of the Document Stoppers is operatively connected to the raising and lowering of the Pick-Up Roller.

Paper Take-Up Clutch CL1

Main Motor M1

Pick-Up Roller

Paper Empty Sensor PC2

Document Stoppers

Take-Up Roller

4688M005AA

M-7

7-2. Document Separating Mechanism

•The coefficient of friction between the Take-Up Roller and Separator Roller is effectively used to prevent double feed of paper.

When one sheet	: The coefficient of friction on the front side of the sheet of paper
of paper is taken	taken up and fed through the space between the Take-Up Roller
up	and Separator Roller is the same as that on the backside of the
	sheet of paper, allowing the paper to be properly fed into the
	copier.

When two or more sheets of paper are taken up

:The coefficient of friction between the paper and the Separator Roller is greater than that between the sheets of paper, which allows only the top sheet of paper to be fed into the copier.

Take-Up Roller

Separator Roller

4688M006AA

M-8

8.TRANSPORT/EXIT MECHANISM

8-1. Document Transport Mechanism

•The document taken up is transported to the document scanning position of the copier by the Registration Rollers.

•The Registration Rollers are turned by a gear train and belts which are driven by the Main Motor.

Main Motor M1

Registration Rollers

4688M007AA

M-9