Konica Minolta LT-401, LT-411 User Manual
SERVICE MANUAL
MODELS
LT-401/411
Large Capacity Tray Units
(With Parts Catalogs)
SEPTEMBER 2000
CSM - LT401/411
Blank page.
LT-401/LT-411
SERVICE MANUAL
SEPTEMBER 2000
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
© 2000, KONICA BUSINESS TECHNOLOGIES, INC. All rights reserved.
Printed in U.S.A.
CONTENTS
CONTENTS |
|
OUTLINE |
|
LT-401/LT-411 PRODUCT SPECIFICATIONS ................. |
1 |
Type ............................................................................. |
1 |
Functions ..................................................................... |
1 |
Machine Data .............................................................. |
1 |
Maintenance ................................................................ |
1 |
Operating Environment ................................................ |
1 |
CENTER CROSS-SECTIONAL DRAWING ...................... |
2 |
DRIVE SYSTEM DRAWING ............................................. |
3 |
Paper feed drive section .............................................. |
3 |
Stacked paper up/down wire drive section .................. |
4 |
UNIT EXPLANATION |
|
PAPER FEED SECTION ................................................... |
6 |
Composition ................................................................. |
6 |
Mechanisms ................................................................ |
6 |
First paper feed control ............................................... |
7 |
Up/down plate drive control ....................................... |
10 |
Remaining paper detection/No paper |
|
detection control ...................................................... |
11 |
DISASSEMBLY/ASSEMBLY |
|
PAPER FEED SECTION ................................................. |
12 |
Cleaning the Paper Dust Removing Brush ............... |
12 |
Cleaning the PS106 (LT feed PS)/PS107 |
|
(LT pre-registration PS) ........................................... |
12 |
Removing and Reinstalling the Paper |
|
Feed Roller Unit ....................................................... |
12 |
Replacing the Paper feed Roller Rubber/Feed |
|
Roller Rubber .......................................................... |
13 |
Replacing the Double Feed Prevention Roller |
|
Rubber ..................................................................... |
14 |
Replacing the MC101 (LT feed MC)/MC102 |
|
(LT first paper feed MC) .......................................... |
15 |
Replacing the LT-401 Up/Down Wires ...................... |
16 |
Replacing the LT-411 Up/Down Wires ...................... |
20 |
DIAGRAMS |
|
ELECTRICAL PARTS LAYOUT ...................................... |
25 |
CONNECTOR LAYOUT .................................................. |
26 |
TIMING CHART (LT-401) ............................................... |
27 |
TIMING CHART (LT-411) ............................................... |
28 |
OVERALL WIRING DIAGRAM ........................................ |
29 |
iii
CONTENTS
This page left blank intentionally.
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 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.
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 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!
vi
LT-401/LT-411
LT-401/LT-411 PRODUCT SPECIFICATIONS
Type
Type: Side mount type large volume paper feed tray
Functions
Standard size paper :
LT-401: 8.5x5.5/8.5 x 11
Wide paper (maximum 314mm x 223mm)
LT-411: 11 x 17/8.5 x 14/8.5 x 11/8.5 x 11R
Wide paper (maximum 314mm x 459mm)
Maximum quantity:
4000 sheets (22 lb.)
Machine Data
Power source 24V DC/5V (supplied from the main unit), AC27.3V
Max. power consumption
LT-401: |
Maximum 82W |
LT-411: |
Maximum 100 W |
Weight
LT-401: Approximately 66 lb.
LT-411: Approximately 92 lb.
Machine dimensions
LT-401: 16.9(W) x 25.2(D) x 27.2(H) in
LT-411: 26.4(W) x 25.2(D) x 27.4(H) in
Maintenance
Maintenance: Same as the main unit
Operating Environment
Temperature: |
50°F to 86°F |
Humidity: |
10% to 80%RH |
Note: The information herein may subject to change for improvement without notice.
1
LT-401/LT-411
CENTER CROSS-SECTIONAL DRAWING
Feed roller
Conveyance roller
Paper feed roller
Top cover
Up/down wire (the other side wire as well)
Double feed prevention roller
Up/down plate
2
LT-401/LT-411
DRIVE SYSTEM DRAWING
Paper feed drive section
Feed roller |
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LT First paper feed SD |
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(SD100) |
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Paper feed roller |
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FRONT |
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LT paper feed motor |
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(M101) |
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LT First paper feed MC |
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(MC 102) |
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Conveyance roller |
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LT feed drive MC |
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(MC101) |
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Double feed |
Paper feed roller |
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prevention roller |
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FRONT |
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Feed roller |
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3 |
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LT-401/LT-411
Stacked paper up/down wire drive section
LT-401
Up/down plate
LT up/down motor (M100)
Up/down shaft
FRONT
4
LT-401/LT-411 |
LT-411 |
Up/down plate |
LT up/down motor |
(M100) |
Up/down shaft |
FRONT |
5 |
LT-401/LT-411
PAPER FEED SECTION
Composition
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SD100 |
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MC101(LT feed MC) |
(LT first paper feed SD) |
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Paper dust |
PS106 (LT feed PS) |
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MC102(LT first paper feed MC) |
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M101 |
removing brush |
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(LT paper |
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Conveyance |
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feed motor) |
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roller |
PS107 (LT pre- |
registration PS)
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Up/down wire |
Up/down plate |
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(the other side wire |
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as well) |
SW 100 (LT tray down drive switch) |
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M100 |
Remaining paper |
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(LT up/down |
detection gear |
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motor) |
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Mechanisms
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Mechanism |
Method |
*1 |
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Paper lifting |
Wire drive |
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Paper feed |
Paper feed roller |
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No paper detection |
Photo sensor (PS108) |
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+actuator |
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Paper size detection |
None |
*2 |
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Remaining paper |
Remaining paper de- |
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detection |
tection gear+photo |
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sensors |
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(PS102, PS103, PS104, |
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PS105) |
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Paper conveyance |
Roller transport |
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*1: Paper lifting
a. Up/down plate lifting drive operation
b. Up/down plate down drive operation
The up/down plate automatically lowers by 120 mm when the top cover is opened. Subsequently, it is lowered by 120 mm each time SW100 (LT tray down drive switch) is pressed.
*2: Remaining paper detection
The LCT is equipped with a remaining paper detection gear which rotates together with M100 (LT up/down) driving the up/down plate.
The remaining paper detection gear has an actuator to turn ON/OFF PS102 (LT remaining paper detection PS1), PS103 (LT remaining paper detection PS2), PS104 (LT remaining paper detection PS3), and PS105 (LT remaining paper detection PS4).
The up/down plate is lifted with the up/down wires. When the top cover closes, M100 (LT up/down) rotates and the up/down plate connected to the up/down wires rises.
6
LT-401/LT-411
Each sensor is turned ON/OFF according to the rotating position of the remaining paper detection gear and since this is linked with the up/down position of the up/down plate, the remaining paper quantity in the LCT can be determined by monitoring the ON/OFF of each sensor. The remaining paper quantity detected with the four sensors is displayed on the main body display.
a. |
LT-401 |
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M100 (LT up/down motor) |
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Actuator |
PS102 (LT |
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remaining paper |
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detection PS1) |
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PS103 (LT |
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remaining |
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paper |
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detection |
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PS2) |
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PS104 (LT |
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remaining |
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paper |
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detection |
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PS3) |
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Gear for M100 |
PS105 (LT |
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Remaining |
remaining paper |
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detection PS4) |
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paper detection |
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gear |
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b. |
LT-411 |
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PS103 (LT |
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remaining |
PS104 (LT |
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remaining paper |
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paper |
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PS102 (LT |
detection PS3) |
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detection |
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remaining paper |
PS2) |
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detection PS1) |
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Actuator |
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Gear for M100 |
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PS105 (LT |
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Remaining paper |
remaining paper |
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detection PS4) |
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detection gear |
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First paper feed control
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LT DB |
5VDC |
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PS100 |
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PS100 |
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SGND |
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5VDC |
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PS106 |
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PS106 |
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SGND |
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PS107 |
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PS107 |
HTR101 |
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5VDC |
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PS110 |
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PS110 |
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SGND |
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24VDC |
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MC101 |
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MC101 DRIVE |
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MAIN BODY |
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HTR101 CONT |
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24VDC |
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MC102 |
AC(H) |
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MC102 DRIVE |
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24VDC |
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PGND |
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24VDC |
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SD100 |
5VDC |
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SD100 DRIVE |
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SGND |
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LT TXD |
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24VDC |
MS101 |
MS102 |
LT RXD CLK |
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LT TXD LATCH |
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LT TXD CLK |
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LT ERR |
(LT-411 only)M101 H/L |
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M101 |
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LT RXD |
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M101 CONT |
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LT ACK |
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M101 EM |
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LT REQ |
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PGND |
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The first paper is fed by the paper feed roller and the feed roller driver by M101(LT paper feed) via MC101(LT feed MC). The feed roller ass'y is lowered by SD100 (first paper-feed) to touch the paper when MC101 (LT feed) turns ON and drive SD100 (LT first paper feed). After touching and feeding the paper, the feed roller ass'y is raised by SD100 (LT first paper feed) to release the feed roller ass'y from the paper. Then, the paper is fed into the paper conveyance section by the paper feed roller which is driven by M101 via MC102 (LT first paper feed).
The related signals are: PS100 (LT top cover open/ close detection), PS106 (LT feed), PS107 (LT preregistration), and PS110 (LT jam access door open/ close detection).
1.Operation
a.First paper feed timing
Normally, this machine feeds paper at a speed of 600 mm/s. When the longitudinal length of paper is 300 mm or more, this machine cannot complete paper ejection even if paper has reached the image transfer section. The paper feed speed of the image transfer section is 370 mm/s at this time. Therefore, the LT-411 in which paper with a longitudinal length of 300 mm or more is set changes the paper feed speed from
7
LT-401/LT-411
600 mm/s to 370 mm/s for the image transfer section.
Paper with a longitudinal length of less than 300 mm/s is ejected before it reaches the image transfer section, so the paper feed speed is fixed at 600 mm/s.
The description given under “Paper with a longitudinal length of less than 300 mm is fed in the following case:” also covers the operation of the LT-401 that can handle only the paper with a length of less than 300 mm.
(1)Start of first paper feed
•Paper with a longitudinal length of less than 300 mm is fed in the following case:
At predefined interval after the START button is pressed(Paper feed speed does not change.)
•Paper with a longitudinal length of 300 mm or more is fed in the following case: High-speed paper feed starts when the specified time lapses after the START button is pressed. The high speed paper feed feed is switched to the low speed paper feed after PS44 (second paper feed) is turned ON and loop is formed.
(2)Start of second and subsequent papers
•When PS106 (LT feed) is turned OFF by the preceding paper, the paper feed speed is low for the paper with a longitudinal length of 300 mm or more.This low speed paper feed is switched to the high speed paper feed for the next paper as soon as PS107(LT preregistration) is turned OFF.
(3)OFF timing
When the specified time lapses after PS106 is turned OFF by the last paper
b.Interlock
The power supply line of M101 (LT paper feed) is equipped with MS101 (LT interlock MS1) and MS102 (LT interlock MS2). When the top cover is opened, MS101 turns OFF, and when the jam access door is opened MS102 turns OFF, thereby cutting off the power supply to M101.
Furthermore, the top cover is equipped with PS100 (LT top cover open/close detection) and the jam access door is equipped with PS110 (LT jam access door open/close detection) and when either of these doors is opened during paper feed, the M101 drive signal is turned OFF to stop the paper feed operation.
c.Internal heater
The LCT is equipped with HTR101 (LT internal heater) to protect the paper from humidity. HTR101 is directly controlled by the main body ACDB (AC drive board) rather than by the LTDB (LT drive board).
2.Signals
a.Input signals
(1)PS100 (PS100 to LTDB)
Top cover open/close detection signal [L]: Cover opened
[H]: Cover closed
(2)PS106 (PS106 to LTDB)
Transport roller exit paper detection signal [L]: Paper detected
[H]: Paper not detected
(3)PS107 (PS107 to LTDB)
Transport roller entrance (pre-registration position) paper detection signal
[L]: Paper detected [H]: Paper not detected
(4)PS110 (PS110 to LTDB)
Jam access door open/close detection signal [L]: Door opened
[H]: Door closed
(5)M101 EM (M101 to LTDB)
M101 rotation error detection signal [L]: M101 rotating
[H]: M101 not rotating
(6)LT TXD (MAIN BODY to LTDB)
Serial data to transmit main body PRCB operating status to LTDB
(7)LT TXD LATCH (MAIN BODY to LTDB) LT TXD signal latch signal
(8)LT TXD CLK (MAIN BODY to LTDB) LT TXD signal clock signal
(9)LT ERR (MAIN BODY to LTDB)
Signal to notify LTDB when there is error in the main body
(10)LT ACK (MAIN BODY to LTDB)
Serial data transmission enable signal from LCT to main body PRCB
8
LT-401/LT-411
b.Output signal
(1)MC101 DRIVE (LTDB to MC101) MC101 ON/OFF drive signal
[L]: MC101 ON [H]: MC101 OFF
(2)MC102 DRIVE (LTDB to MC102) MC102 ON/OFF drive signal
[L]: MC102 ON [H]: MC102 OFF
(3)SD100 DRIVE (LTDB to SD100) SD100 ON/OFF drive signal
[L]: SD100 ON [H]: SD100 OFF
(4)M101 CONT (LTDB to M101)
M101 ON/OFF control signal [L]: M101 ON
[H]: M101 OFF
(5)LT RXD (LTDB to MAIN BODY)
Serial data to transmit the LTDB operating status to main body PRCB
(6)LT RXD CLK (LTDB to MAIN BODY) LT RXD signal clock signal
(7)LT REQ (LTDB to MAIN BODY)
Serial data send request signal from LCT to main body PRCB
(8)M101 H/L (LTDB to M101)
M101 speed control signal. (LT-411 only) [L]: Low speed rotation
[H]: High speed rotation
9
LT-401/LT-411
Up/down plate drive control
|
LT DB |
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5VDC |
PS100 |
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PS100 |
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SGND |
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5VDC |
PS101 |
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PS101 |
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SGND |
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SW100 |
MAIN BODY 24VDC |
SW100 |
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PGND |
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5VDC |
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SGND |
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5VDC |
PS109 |
LT TXD |
PS109 |
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LT RXD CLK |
SGND |
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LT TXD LATCH |
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LT TXD CLK |
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LT ERR |
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LT RXD |
M100 DRIVE |
M100 |
LT ACK |
M100 DRIVE |
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LT REQ |
|
When the top cover opens or closes, M100 (LT up/ down motor) rotates forward or backward to move the up/down plate up or down.The up/down plate descends by 120 mm each time SW100 (LT tray down drive switch) is pressed while the top cover is opened. The related signals are PS100 (LT top cover open/close detection), PS101 (LT lower limit detection), and PS109 (LT upper limit detection).
1.Operation
a. Up/down plate descend timing
(1)ON timing
When the top cover is opened and PS100 is turned OFF, M100 rotates backward to lower the up/down plate.
When SW100 (LT tray down drive switch) turns ON by pressing, M100 rotates backward to move the up/down plate down.
(2)OFF timing
M100 turns OFF at predefined interval after PS100 turns OFF or SW100 turns ON. This in turn lowers the up/down plate by 120 mm.
(3)Others
The up/down plate descends by 120 mm each time SW100 is pressed until PS101 turns ON to indicate the bottom limit of the up/down plate.
b.Up/down plate ascend timing
(1)ON timing
When the top cover is closed and PS100 is turned ON, M100 rotates forward to raise the up/down plate.
(2)OFF timing
When the up/down plate rises and PS109 (LT upper limit detection) turns ON to indicate the detection of the topmost paper, M100 turns OFF and stops the up/down plate.
The up/down plate also stops when the top cover is opened and PS100 turns OFF.
2.Signals
a.Input signals
(1)PS101 (PS101 to LTDB)
Up/down plate lower limit detection signal [L]: Up/down plate not at lower limit
[H]: Up/down plate at lower limit
(2)PS109 (PS109 to LTDB)
Up/down plate upper limit detection signal [L]: Up/down plate not at upper limit
[H]: Up/down plate at upper limit
(3)SW100 (SW100 to LTDB)
SW100 ON/OFF detection signal [L]: SW100 ON
[H]: SW100 OFF
b.Output signals
(1)M100 DRIVE1, 2 (LTDB to M100)
M100 drive signal
These signals switches the direction of the drive current to control the rotation direction of M100.
10
LT-401/LT-411
Remaining paper detection/No paper detection control
|
LT DB |
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|
5VDC |
PS102 |
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PS102 |
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SGND |
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5VDC |
PS103 |
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PS103 |
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SGND |
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5VDC |
PS104 |
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PS104 |
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SGND |
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MAIN BODY 24VDC |
5VDC |
PS105 |
PS105 |
||
PGND |
SGND |
|
5VDC |
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SGND |
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5VDC |
PS108 |
LT TXD |
PS108 |
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LT RXD CLK |
SGND |
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LT TXD LATCH |
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LT TXD CLK |
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LT ERR |
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LT RXD |
M100 DRIVE |
M100 |
LT ACK |
M100 DRIVE |
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LT REQ |
|
The remaining paper quantity is detected by PS102 (LT remaining paper detection 1), PS103 (LT remaining paper detection 2), PS104 (LT remaining paper detection 3), and PS105 (LT remaining paper detection 4) and no paper detection is made by PS108 (LT no paper detection).
The signals detected by these sensors are controlled by LTDB (LT drive board) and displayed on the main body display.
1.Operation
a.Remaining paper detection control
The remaining paper quantity is determined from the ON/OFF combination of sensors PS102, PS103, PS104, and PS105 which detect the rotational position of M100 that is driving the up/ down plate. Each sensor turns ON or OFF according to the position of the remaining paper detection gear which is linked with the rotation of M100.
The remaining paper quantity is detectable at eight levels, but it is displayed on the main body display as five levels.
<Remaining paper quantity and display>
Stacked |
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Remaining |
|
paper |
PS102 |
PS103 |
PS104 |
PS105 |
paper quantity |
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quantity |
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display |
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0 to 700 |
OFF |
OFF |
OFF |
OFF |
1 flashing |
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701 to 1200 |
ON |
OFF |
OFF |
OFF |
1 on |
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1201 to 1700 |
ON |
ON |
OFF |
OFF |
2 on |
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1701 to 2200 |
ON |
ON |
ON |
OFF |
2 on |
|
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2201 to 2700 |
ON |
ON |
ON |
ON |
3 on |
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2701 to 3200 |
OFF |
ON |
ON |
ON |
3 on |
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3201 to 3700 |
OFF |
OFF |
ON |
ON |
4 on |
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3701 or |
OFF |
OFF |
OFF |
ON |
4 on |
|
more |
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|
Caution: The remaining paper quantity is indicated on the control panel with four horizontal bars. Stacked paper quantity differs depending on the thickness of the paper.
b.No paper detection control
When there is no more paper inside the LCT, PS108 turns ON and a message is displayed on the main body display.
2.Signals
a.Input signals
(1) PS102 (PS102 to LTDB)
Remaining paper detection gear rotational position detection signal
[L]: PS102 OFF
[H]: PS102 ON
(2) PS103 (PS103 to LTDB)
Remaining paper detection gear rotational position detection signal
[L]: PS103 OFF
[H]: PS103 ON
(3) PS104 (PS104 to LTDB)
Remaining paper detection gear rotational position detection signal
[L]: PS104 OFF
[H]: PS104 ON
(4) PS105 (PS105 to LTDB)
Remaining paper detection gear rotational position detection signal
[L]: PS105 OFF
[H]: PS105 ON
(5)PS108 (PS108 to LTDB)
LCT no paper detection signal [L]: No paper
[H]: Paper present
11
LT-401/LT-411
PAPER FEED SECTION
Cleaning the Paper Dust Removing Brush
Caution: If LT is connected to the main unit, make sure that main unit power plug is disconnected from the power outlet.
a.Procedure
(1)Open the top cover.
(2)Remove the two screws to detach the paper feed cover B.
Top 
cover 
Screws
Paper feed cover B
(3)Insert a flat bladed screwdriver in the slots (in two locations) for paper dust removing brush to release the locking lugs, then remove the paper dust removing brush.
Paper dust removing |
brush |
Cavity |
Locking lugs |
(4)Clean the paper dust removing brush using a blower brush or the like.
(5)Reinstall the above parts following the removal steps in reverse.
Cleaning the PS106 (LT feed PS)/PS107 (LT pre-registration PS)
Caution: If LT is connected to the main unit, make sure that main unit power plug is disconnected from the power outlet.
a.Procedure
(1)Looking into the paper ejection side of the LCT from below, and clean sensors through the cavity for PS106 and the cavity for PS107 using a blower brush or the like.
Cavity for PS106 |
Cavity for PS107 |
Paper |
exit |
side |
Removing and Reinstalling the Paper Feed Roller Unit
Caution: If LT is connected to the main unit, make sure that main unit power plug is disconnected from the power outlet.
a.Procedure
(1)Open the top cover.
(2)Remove the spring from the paper feed roller unit.
Top cover
Spring
Remove |
this. |
Paper feed roller unit
Paper feed roller unit
12
LT-401/LT-411
(3)After removing the two retaining rings, remove the two bearings outward to remove the paper feed roller unit.
Paper feed roller unit |
|
Bearing |
Bearing |
|
|
Retaining |
Retaining |
ring |
ring |
(4)Reinstall the above parts following the removal steps in reverse.
Replacing the Paper feed Roller Rubber/ Feed Roller Rubber
Caution: If LT is connected to the main unit, make sure that main unit power plug is disconnected from the power outlet.
a.Procedure
(1)Remove the paper feed roller unit.
(2)Remove the bearing and paper feed reference
actuator. |
Paper feed reference actuator |
Bearing |
(3)Remove the two retaining rings.
(4)Remove the bearing outward to detach the roller section from the roller fitting.
Bearing |
Roller fitting |
Retaining |
ring |
Bearing |
(5)Remove the bearing from the opposite side of the coupling, then remove the paper feed roller from the shaft.
(6)Remove the retaining ring to pull the feed roller from the shaft.
(7)Remove the rubber from each roller.
Paper feed roller rubber |
Coupling |
||
|
|||
Paper feed |
Shaft |
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|
||
roller |
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Shaft |
Feed roller |
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Paint |
Bearing |
Retaining |
mark |
|
ring |
|
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|
Feed roller |
|
|
|
rubber |
|
13
LT-401/LT-411
(8)Reinstall the above parts following the removal steps in reverse.
Caution 1: Make sure rollers and rubber portions are oriented properly when reinstalling them.
Caution 2: Make sure the one-way clutch direction is correct.
Caution 3: Check whether grease or the like is present on each roller.
Replacing the Double Feed Prevention Roller Rubber
Caution: If LT is connected to the main unit, make sure that main unit power plug is disconnected from the power outlet.
a.Procedure
Caution: With the power held on, press the SW100 (LT tray down switch) to move the up/down plate down to the bottom in advance.
(1)Remove the paper feed roller unit.
(2)Remove the two screws to detach the double feed prevention roller unit cover.
Double feed |
Double feed |
prevention roller |
|
prevention roller |
unit cover |
Screws
(3)Remove the two screws to detach the double feed prevention roller unit.
Caution: When reinstalling the double feed prevention roller unit, tighten the screws on the rear side first.
Double feed prevention roller unit |
Screws |
(4)Remove the two retaining rings, fit the shaft into the D-cut in the fitting, and remove the double feed prevention roller together with the shaft.
Double feed |
prevention roller |
D-cut |
Retaining ring |
14
LT-401/LT-411
(5)Remove the double feed prevention roller rubber from the double feed prevention roller.
Paint mark |
Double feed |
prevention roller |
Shaft |
Double feed |
prevention roller |
rubber |
(6)Reinstall the double feed prevention roller in the reverse order of the removal procedure. Caution 1: Make sure the double feed preven-
tion roller rubber is oriented properly when reinstalling it.
Caution 2: Check whether scratch or like is visible on the pet cock for the drive gear.
Caution 3: Check whether grease or the like is present on double feed roller.
Replacing the MC101 (LT feed MC) MC102 (LT first paper feed MC)
a.Procedure
(1)Open the top cover.
(2)Remove the spring from the paper feed roller unit.
(3)Remove the two screws to detach the top cover.
Top cover |
Screws |
(4)Remove the two screws to detach the clutch replacement cover.
Clutch replacement |
cover |
Screws |
15
LT-401/LT-411
(5)Disconnect two relay connectors (CN765, CN766) of the clutches.
(6)Remove the retaining ring to detach each clutch.
MC101 (LT Paper feed MC) |
MC102 (LT first |
|
paper feed MC) |
||
|
Retaining
ring Retaining ring
Relay |
|
|
connector |
Relay connector |
|
(CN766) |
||
(CN765) |
||
|
(7)Reinstall the above parts following the removal steps in reverse.
Caution: When installing each MC, make sure that the stopper of each clutch is on the predefined position.
Replacing the LT-401 Up/Down Wires
a.Procedure
Caution: With the power held on, press the SW100 (LT tray down switch) to move the up/down plate down to the bottom in advance.
(1)Open the top cover.
(2)Remove the clutch replacement cover.
(3)Remove the four screws to detach the right side cover.
Screws
Right side |
Screws |
cover |
(4)After opening the jam access door, remove the four screws to detach the front cover.
Caution: Remove the four screws and then remove the front cover with the jam access door closed.
Jam access door |
|
Screws |
Screws |
Right side cover |
|
16
LT-401/LT-411
(5) Remove the five screws to detach the rear cover.
Screw
|
Rear cover |
Screws |
Screws |
|
(6)Remove the five relay connectors (CN749, CN780, CN781, CN782, CN783) to disconnect the wiring harness from the up/down motor mounting plate.
(7)Remove the E-ring to detach the up/down gear.
(8)Pull the pin from the shaft.
(9)Remove the E-ring to detach the bearing. (10)Remove the three screws to detach the up/down
motor assembly.
Up/down |
|
Relay |
|
motor |
|
||
Relay connector |
connector |
||
assembly |
|||
(CN749) |
(CN780) |
||
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|||
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Relay |
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|
Screw |
connector |
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|
(CN781) |
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Relay |
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|
connector |
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|
(CN782) |
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Relay |
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|
connector |
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(CN783) |
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|
Screw |
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|
Bearing |
||
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|
E-ring |
|
Shaft |
|
Up/down |
|
Screw |
gear |
||
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|||
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||
|
Pin |
E-ring |
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|
|
||
(11)Replace the up/down wire following the instructions in “Removing Up/Down Wires” and “Installing Up/Down Wires.”
Caution: Four up/down wires with different length, two at the front and two at the back, are used. Wires with the same length can be used either at the front or back if they are used in the same location.
1323.6mm
Wire A
1250.3mm
Wire B
769.3mm
Wire C
661mm
Wire D
17
LT-401/LT-411
<Removing the Up/Down Wires>
Wire A
Wire B
14.Release the metal ball to remove wire A.
7.Release the metal ball to remove wire C.
9.Release the metal ball to remove wire D.
12.Release the metal ball to remove wire B.
Wire C
Wire D
6. Remove the E-ring.
8. Remove the pulley.
10.Remove the pulley.
11.Remove the E-ring, then remove the pulley to release wire B.
Up/down plate
Wire B
Wire A
2.Release the metal ball to remove wire C.
18.Release the metal ball to remove wire A.
4.Release the metal ball to remove wire D.
16.Release the metal ball to remove wire B.
FRONT |
Up/down |
|
|
|
shaft |
13.Remove the pulley to release wire A.
Wire D
Wire C
1.Remove the E-ring.
3.Remove the pulley.
5.Remove the pulley.
15.Remove the E- ring, then remove the pulley to release wire B.
17.Remove the pulley to release wire A.
18
LT-401/LT-411
<Installing the Up/Down Wires>
Wire A
Wire B
7.Insert wire A in the pulleys, then attach a metal ball.
15.Insert wire C in the pulleys, then attach a metal ball.
12.Insert wire D in the pulleys, then attach a metal ball.
10.Insert wire B in the pulleys, then attach a metal ball.
Wire C
Wire D
13.Insert wire C in the up/ down shaft, attach a pulley, and secure the pulley with an E-ring.
14.Wind wire C around the pulley by 6 turns in such a manner that the wire can be pulled from over the pulley.
6 turns
11.Insert wire D in the up/ down shaft, attach a pulley, and wind wire D around the pulley by six turns in such a manner that the wire can be pulled from over the pulley.
Up/down plate
Wire B
Wire A
FRONT |
Up/down |
shaft |
1. Insert wire A in
6. the up/down shaft, attach pulleys, then pull the wire from under the pulleys.
3.Insert wire B in the up/
8.down shaft, attach a pulley, and secure the pulley with E-rings.
4.Pull wire B from under the
9.pulleys.
20.Insert wire B in the pulleys, then attach a metal ball.
2.Insert wire A in the pulleys, then attach a metal ball.
17.Insert wire D in the pulleys, then attach a metal ball.
5.Insert wire B in the pulleys, then attach a metal ball.
Wire D
Wire C
18.Insert wire C in the up/ down shaft, attach a pulley, and secure the pulley with an E-ring.
19.Wind wire C around the pulley by 6 turns in such a manner that the wire can be pulled from over the pulley.
6 turns
16.Insert wire D in the up/ down shaft, attach a pulley, and wind wire D around the pulley by six turns in such a manner that the wire can be pulled from over the pulley.
6 turns |
6 turns |
19
LT-401/LT-411
(12)After installing the up/down wires, make sure the up/down wires are passed in the grooves in the pulleys properly and wires do not run on the sides of the pulleys. Also make sure the up/down plate can be moved up and down smoothly by hand. Caution: If the up/down plate does not move
up and down smoothly, reinstall the up/down wires.
(13)Install the up/down wire drive motor assembly, up/down gear, and relay connectors, following the removal steps in reverse.
(14)Remove the E-ring to detach the idle gear.
(15)Rotate the remaining paper detection gear until the round hole in this gear is aligned with the oblong hole in the up/down motor mounting plate. Caution: Align when the up/down plate is in
lowest position.
Up/down motor |
|
|
mounting plate |
Remaining paper |
|
|
||
|
detection gear |
|
|
|
Round |
|
Oblong |
hole |
Idle gear |
hole |
|
E-ring |
|
|
(16)Install the idle gear.
(17)Attach the covers following the removal steps in reverse.
Caution: After replacing the up/down wires, correct horizontal and centering of the up/down plate. (Refer to “ADJUSTMENT SECTION.”)
Replacing the LT-411 Up/Down Wires
a.Procedure
Caution: With the power held on, press the SW100 (LT tray down switch) to move the up/down plate down to the bottom in advance.
(1)Remove the clutch replacement cover, side cover (right), front cover, and rear cover following the steps (1) to (5) in [7] Replacing the LT-401 Up/ Down Wires.
(2)Remove the E-ring.
(3)Remove the five screws to detach the gear cover.
(4)Remove the two bearings.
|
Screw |
|
Screw |
|
Gear cover |
E-ring |
Bearing |
|
|
|
Screws |
|
Bearing |
(5)Remove the gear A.
(6)Remove the E-ring to remove gear B.
(7)Remove the detent pin for gear B from the up/ down pulley shaft.
(8)Remove the E-ring and bearing to remove gear C.
|
Bearing |
|
|
Gear C |
|
Gear A |
E-ring |
|
Pin |
||
E-ring |
||
|
||
Gear B |
Up/down pulley shaft |
20
LT-401/LT-411
(9)Remove the bearing behind gear C.
(10)Remove the E-ring to remove the up/down gear.
(11)Remove the detent pin for up/down gear from the up/down pulley shaft.
(12)Remove the E-ring to remove gear D.
(13)Remove the E-ring to remove the remaining paper detection gear.
(14)Remove the four relay connectors (CN780, CN781, CN782, and CN783) to disconnect the wiring harness from the up/down motor mounting plate.
Relay connector |
Relay |
Relay connector |
||
connector |
||||
(CN780) |
||||
(CN781) |
(CN782) |
|||
|
||||
Remaining paper |
|
|
Up/down motor |
|
|
|
mounting plate |
||
detection gear |
|
|
||
|
|
|
||
Gear D |
|
|
|
|
E-ring |
|
|
|
|
Pin |
|
|
|
|
|
|
|
Relay |
|
Up/down |
|
|
connector |
|
|
|
(CN783) |
||
gear |
|
|
||
|
|
|
||
E-ring |
Bearing |
E-ring |
||
Up/down pulley shaft |
|
|
||
(15)Remove the E-ring to remove the bearing.
(16)Remove the six screws to remove the up/down motor mounting plate.
Up/down motor mounting plate |
|
|
Screws |
Bearing |
|
E-ring |
Screws |
(17)Replace the up/down wire following the instructions in “Removing the Up/Down Wires” and “Installing Up/Down Wires.”
Caution: Four up/down wires with different length, two at the front and two at the back, are used. Wires with the same length can be used either at the front or back if they are used in the same location.
1057.3mm
Wire A
692.1mm
Wire B
1321.7mm
Wire C
1303.1mm
Wire D
21
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