Develop QC 2235 Plus Service Manual
DEVELOP
SERVICE MANUAL
THEORY OF OPERATION
QC 2235plus
QC 2235plus Field Service Ver1.0 Mar. 2004 SAFETY AND IMPORTANT WARNING
SAFETY AND IMPORTANT WARNING ITEMS
Read carefully the Safety and Important Warning Items described below to understand
them before doing service work.
IMPORTANT NOTICE
Because of possible hazards to an inexperienced person servicing this product as well as
the risk of damage to the product, Develop GmbH. (hereafter called the Develop) strongly
recommends that all servicing be performed only by Develop-trained service technicians.
Changes may have been made to this product to improve its performance after this Service
Manual was printed. Accordingly, Develop does not warrant, either explicitly or implicitly,
that the information contained in this Service Manual is complete and accurate.
The user of this Service Manual must assume all risks of personal injury and/or damage to
the product while servicing the product for which this Service Manual is intended.
Therefore, this Service Manual must be carefully read before doing service work both in the
course of technical training and even after that, for performing maintenance and control of
the product properly.
Keep this Service Manual also for future service.
DESCRIPTION ITEMS FOR DANGER, WARNING AND CAUTION
In this Service Manual, each of three expressions " DANGER", " WARNING", and
" CAUTION" is defined as follows together with a symbol mark to be used in a limited
meaning.
When servicing the product, the relevant works (disassembling, reassembling, adjustment,
repair, maintenance, etc.) need to be conducted with utmost care.
DANGER: Action having a high possibility of suffering death or serious injury
WARNING: Action having a possibility of suffering death or serious injury
CAUTION: Action having a possibility of suffering a slight wound, medium
Symbols used for safety and important warning items are defined as follows:
:Precaution when servicing the
product.
:Prohibition when servicing the
product.
:Direction when servicing the
product.
trouble, and property damage
General
precaution
General
prohibition
General
instruction
S-1
Electric hazard High temperature
Do not touch
with wet hand
Unplug Ground/Earth
Do not
disassemble
SAFETY AND IMPORTANT WARNING ITEMS QC 2235plus Field Service Ver1.0 Mar.
SAFETY WARNINGS
[1] MODIFICATIONS NOT AUTHORIZED BY DEVELOP GMBH
Develop brand products are renowned for their high reliability. This reliability is achieved
through high-quality design and a solid service network.
Product design is a highly complicated and delicate process where numerous mechanical,
physical, and electrical aspects have to be taken into consideration, with the aim of arriving
at proper tolerances and safety factors. For this reason, unauthorized modifications involve
a high risk of degradation in performance and safety. Such modifications are therefore
strictly prohibited. the points listed below are not exhaustive, but they illustrate the reasoning behind this policy.
DANGER : PROHIBITED ACTIONS
• Using any cables or power cord not specified by Develop.
• Using any fuse or thermostat not specified by Develop.
Safety will not be assured, leading to a risk of fire and
injury.
• Disabling fuse functions or bridging fuse terminals with
wire, metal clips, solder or similar object.
• Disabling relay functions (such as wedging paper between
relay contacts)
• Disabling safety functions (interlocks, safety circuits, etc.)
Safety will not be assured, leading to a risk of fire and
injury.
• Making any modification to the product unless instructed
by Develop
• Using parts not specified by Develop
S-2
QC 2235plus Field Service Ver1.0 Mar. 2004 SAFETY AND IMPORTANT WARNING
[2] CHECKPOINTS WHEN PERFORMING ON-SITE SERVICE
Develop brand products are extensively tested before shipping, to ensure that all applicable
safety standards are met, in order to protect the customer and customer engineer (hereafter called the CE) from the risk of injury. However, in daily use, any electrical equipment
may be subject to parts wear and eventual failure. In order to maintain safety and reliability,
the CE must perform regular safety checks.
1. Power Supply
WARNING: Wall Outlet
• Check that mains voltage is as specified. Plug the power
cord into the dedicated wall outlet with a capacity greater
than the maximum power consumption.
If excessive current flows in the wall outlet, fire may
result.
• If two or more power cords can be plugged into the wall
outlet, the total load must not exceed the rating of the wall
outlet.
If excessive current flows in the wall outlet, fire may
result.
WARNING: Power Plug and Cord
• Make sure the power cord is plugged in the wall outlet
securely.
Contact problems may lead to increased resistance,
overheating, and the risk of fire.
• Check whether the power cord is damaged. Check
whether the sheath is damaged.
If the power plug, cord, or sheath is damaged, replace
with a new power cord (with plug and connector on each
end) specified by Develop. Using the damaged power
cord may result in fire or electric shock.
S-3
SAFETY AND IMPORTANT WARNING ITEMS QC 2235plus Field Service Ver1.0 Mar.
WARNING: Power Plug and Cord
• When using the power cord (inlet type) that came with this
product, be sure to observe the following precautions:
a. Make sure the connector is securely inserted in the inlet
on the rear panel of the product.
Secure the cord with a fixture properly.
b. If the power cord or sheath is damaged, replace with a
new power cord (with plugs on both ends) specified by
Develop.
If the power cord (inlet type) is not connected to the
product securely, a contact problem may lead to
increased resistance, overheating, and risk of fire.
• Check whether the power cord is not stepped on or
pinched by a table and so on.
Overheating may occur there, leading to a risk of fire.
• Do not bundle or tie the power cord.
Overheating may occur there, leading to a risk of fire.
• Check whether dust is collected around the power plug
and wall outlet.
Using the power plug and wall outlet without removing
dust may result in fire.
• Do not insert the power plug into the wall outlet with a wet
hand.
The risk of electric shock exists.
• When unplugging the power cord, grasp the plug, not the
cable.
The cable may be broken, leading to a risk of fire and
electric shock.
WARNING: Wiring
• Never use multi-plug adapters to plug multiple power cords
in the same outlet.
If used, the risk of fire exists.
S-4
QC 2235plus Field Service Ver1.0 Mar. 2004 SAFETY AND IMPORTANT WARNING
WARNING: Wiring
• When an extension cord is required, use a specified one.
Current that can flow in the extension cord is limited, so
using a too long extension cord may result in fire.
Do not use an extension cable reel with the cable taken
up. Fire may result.
WARNING: Ground connection
• Check whether the product is grounded properly.
If current leakage occurs in an ungrounded product, you
may suffer electric shock while operating the product.
Connect power plug to grounded wall outlet.
2. Installation Requirements
WARNING: Prohibited Installation Place
• Do not place the product near flammable materials or volatile materials that may catch fire.
A risk of fire exists.
• Do not place the product in a place exposed to water such
as rain.
A risk of fire and electric shock exists.
WARNING: When not using product for a long time
• When the product is not used over an extended period of
time (holidays, etc.), switch it off and unplug the power
cord.
Dust collected around the power plug and outlet may
cause fire.
S-5
SAFETY AND IMPORTANT WARNING ITEMS QC 2235plus Field Service Ver1.0 Mar.
CAUTION: Ventilation
• The product generates ozone gas during operation, but it
will not be harmful to the human body.
If a bad smell of ozone is present in the following cases,
ventilate the room.
a. When the product is used in a poorly ventilated room
b. When taking a lot of copies
c. When using multiple products at the same time
CAUTION: Fixing
• Be sure to lock the caster stoppers.
In the case of an earthquake and so on, the product may
slide, leading to a injury.
CAUTION: Inspection before Servicing
• Before conducting an inspection, read all relevant documentation (service manual, technical notices, etc.) and
proceed with the inspection following the prescribed procedure, using only the prescribed tools. Do not make any
adjustment not described in the documentation.
If the prescribed procedure or tool is not used, the product may break and a risk of injury or fire exists.
• Before conducting an inspection, be sure to disconnect
the power plugs from the product and options.
When the power plug is inserted in the wall outlet, some
units are still powered even if the POWER switch is
turned OFF. A risk of electric shock exists.
• The area around the fixing unit is hot.
You may get burnt.
S-6
QC 2235plus Field Service Ver1.0 Mar. 2004 SAFETY AND IMPORTANT WARNING
WARNING: Work Performed with the product Powered
• Take every care when making adjustments or performing
an operation check with the product powered.
If you make adjustments or perform an operation check
with the external cover detached, you may touch live or
high-voltage parts or you may be caught in moving gears
or the timing belt, leading to a risk of injury.
• Take every care when servicing with the external cover
detached.
High-voltage exists around the drum unit. A risk of electric shock exists.
WARNING: Safety Checkpoints
• Check the exterior and frame for edges, burrs, and other
damages.
The user or CE may be injured.
• Do not allow any metal parts such as clips, staples, and
screws to fall into the product.
They can short internal circuits and cause electric shock
or fire.
• Check wiring for squeezing and any other damage.
Current can leak, leading to a risk of electric shock or
fire.
• Carefully remove all toner remnants and dust from electrical parts and electrode units such as a charging corona
unit.
Current can leak, leading to a risk of product trouble or
fire.
• Check high-voltage cables and sheaths for any damage.
Current can leak, leading to a risk of electric shock or
fire.
• Check electrode units such as a charging corona unit for
deterioration and sign of leakage.
Current can leak, leading to a risk of trouble or fire.
S-7
SAFETY AND IMPORTANT WARNING ITEMS QC 2235plus Field Service Ver1.0 Mar.
WARNING: Safety Checkpoints
• Before disassembling or adjusting the write unit (P/H unit)
incorporating a laser, make sure that the power cord has
been disconnected.
The laser light can enter your eye, leading to a risk of
loss of eyesight.
• Do not remove the cover of the write unit. Do not supply
power with the write unit shifted from the specified mounting position.
The laser light can enter your eye, leading to a risk of
loss of eyesight.
• When replacing a lithium battery, replace it with a new lithium battery specified in the Parts Guide Manual. Dispose
of the used lithium battery using the method specified by
local authority.
Improper replacement can cause explosion.
• After replacing a part to which AC voltage is applied (e.g.,
optical lamp and fixing lamp), be sure to check the installation state.
A risk of fire exists.
• Check the interlock switch and actuator for loosening and
check whether the interlock functions properly.
If the interlock does not function, you may receive an
electric shock or be injured when you insert your hand in
the product (e.g., for clearing paper jam).
• Make sure the wiring cannot come into contact with sharp
edges, burrs, or other pointed parts.
Current can leak, leading to a risk of electric shock or
fire.
• Make sure that all screws, components, wiring, connectors, etc. that were removed for safety check and maintenance have been reinstalled in the original location. (Pay
special attention to forgotten connectors, pinched cables,
forgotten screws, etc.)
A risk of product trouble, electric shock, and fire exists.
S-8
QC 2235plus Field Service Ver1.0 Mar. 2004 SAFETY AND IMPORTANT WARNING
WARNING: HANDLING OF CONSUMABLE
• Toner and developer are not harmful substances, but care
must be taken not to breathe excessive amounts or let the
substances come into contact with eyes, etc. It may be
stimulative.
If the substances get in the eye, rinse with plenty of water
immediately. When symptoms are noticeable, consult a
physician.
• Never throw the used cartridge and toner into fire.
You may be burned due to dust explosion.
CAUTION: HANDLING OF SERVICE MATERIALS
• Unplug the power cord from the wall outlet.
Drum cleaner (isopropyl alcohol) and roller cleaner (acetone-based) are highly flammable and must be handled
with care. A risk of fire exists.
• Do not replace the cover or turn the product ON before
any solvent remnants on the cleaned parts have fully
evaporated.
A risk of fire exists.
• Use only a small amount of cleaner at a time and take
care not to spill any liquid. If this happens, immediately
wipe it off.
A risk of fire exists.
• When using any solvent, ventilate the room well.
Breathing large quantities of organic solvents can lead to
discomfort.
S-9
SAFETY AND IMPORTANT WARNING ITEMS QC 2235plus Field Service Ver1.0 Mar.
[3] MEASURES TO TAKE IN CASE OF AN ACCIDENT
1. If an accident has occurred, the distributor who has been notified first must immediately take emergency measures to provide relief to affected persons and to prevent
further damage.
2. If a report of a serious accident has been received from a customer, an on-site evaluation must be carried out quickly and Develop must be notified.
3. To determine the cause of the accident, conditions and materials must be recorded
through direct on-site checks, in accordance with instructions issued by Develop.
[4] CONCLUSION
1. Safety of users and customer engineers depends highly on accurate maintenance and
administration. Therefore, safety can be maintained by the appropriate daily service
work conducted by the customer engineer.
2. When performing service, each product on the site must be tested for safety. The customer engineer must verify the safety of parts and ensure appropriate management of
the equipment.
[5] FUSE
CAUTION
Double pole / neutral fusing
ATTENTION
Double pôle / fusible sur le neutre.
[6] LED Radiation Safety
• This product is a copier which operates by means of a LED (light emitting diodes) expo-
sure system. There is no possibility of danger from the LED optical radiation, because
the LED optical radiation level dose not exceed the accessible radiation limit of class 1
under all conditions of operation, maintenance, service and failure.
S-10
QC 2235plus Field Service Ver1.0 Mar. 2004 SAFETY AND IMPORTANT WARNING
INDICATION OF WARNING ON THE MACHINE
Caution labels shown are attached in some areas on/in the machine.
When accessing these areas for maintenance, repair, or adjustment, special care should
be taken to avoid burns and electric shock.
High voltage
High temperature
S-11
High voltage
High temperature
4036fsS001c0
SAFETY AND IMPORTANT WARNING ITEMS QC 2235plus Field Service Ver1.0 Mar.
Do not throw into a fire
4036fsS002c0
S-12
High voltage
High voltage
4036fsS003c0
DEVELOP
SERVICE MANUAL
THEORY OF OPERATION
QC 2235plus
Main Unit
QC 2235plus Theory of Operation Ver1.0 Mar. 2004
CONTENTS
IOutline
1. System configuration............................................................................................1-1
2. Product specifications ..........................................................................................1-3
2.1 Type ...................................................................................................................1-3
2.2 Functions...........................................................................................................1-3
2.3 Types of paper ...................................................................................................1-4
2.4 Maintenance......................................................................................................1-4
2.5 Machine specifications.......................................................................................1-4
2.6 Operating environment ......................................................................................1-4
2.7 Built-in controllers..............................................................................................1-5
3. Center cross section ............................................................................................1-6
4. Paper path............................................................................................................1-7
5. Image creation process........................................................................................1-8
I Outline
II Composition/Operation
1. Overall composition..............................................................................................2-1
1.1 Timing chart at machine power up ....................................................................2-1
1.2 Control block diagram........................................................................................2-2
2. Scanner section (IR section) ................................................................................2-3
2.1 Composition.......................................................................................................2-3
2.2 Drive ..................................................................................................................2-5
2.3 Operation...........................................................................................................2-5
2.3.1 Scan and Exposure Lamp control ................................................................2-5
2.3.2 Original Size Detection control .....................................................................2-6
3. Write section (PH section)....................................................................................2-9
3.1 Composition.......................................................................................................2-9
3.2 Operation.........................................................................................................2-10
3.2.1 Outline ........................................................................................................2-10
3.2.2 Color Shift Correction System ....................................................................2-11
4. Imaging Unit section (IU section).......................................................................2-12
4.1 Composition.....................................................................................................2-12
4.2 Drive ................................................................................................................2-13
4.3 Operation.........................................................................................................2-14
4.3.1 IU Life control..............................................................................................2-14
5. Photo Conductor section....................................................................................2-15
5.1 Composition.....................................................................................................2-15
5.2 Drive ................................................................................................................2-15
II Composition/Operation
i
QC 2235plus Theory of Operation Ver1.0 Mar. 2004
5.3 Operation......................................................................................................... 2-16
5.3.1 PC Drum Drive mechanism........................................................................ 2-16
5.3.2 PC Drum Phase control ............................................................................. 2-16
5.3.3 PC Drum small amount rotation control ..................................................... 2-17
6. Charge Corona section ...................................................................................... 2-18
6.1 Operation......................................................................................................... 2-19
6.1.1 PC Drum Charge Corona ON/OFF control.................................................2-19
I Outline
6.1.2 Cleaning/Main Erase mechanism............................................................... 2-19
7. Developing section............................................................................................. 2-20
7.1 Composition .................................................................................................... 2-20
7.2 Drive................................................................................................................ 2-21
7.3 Operation......................................................................................................... 2-22
7.3.1 Developing Drive control ............................................................................2-22
7.3.2 Developer flow............................................................................................2-22
7.3.3 Developing bias.......................................................................................... 2-23
7.3.4 HMT (High grade Micro Toning) development............................................ 2-23
II Composition/Operation
7.3.5 Developer scattering prevention mechanism.............................................. 2-23
7.3.6 ATDC Sensor control.................................................................................. 2-24
8. Toner Supply section..........................................................................................2-26
8.1 Composition .................................................................................................... 2-26
8.2 Drive................................................................................................................ 2-27
8.3 Operation......................................................................................................... 2-28
8.3.1 Toner Replenishing mechanism/control ..................................................... 2-28
8.3.2 Toner Near-Empty and Toner Empty detection control............................... 2-29
8.3.3 Shutter mechanism .................................................................................... 2-30
9. Transfer Corona section..................................................................................... 2-31
9.1 Composition .................................................................................................... 2-31
9.1.1 1st Image Transfer section ......................................................................... 2-31
9.1.2 2nd Image Transfer section ........................................................................ 2-33
9.2 Drive................................................................................................................ 2-34
9.2.1 1st Image Transfer section ......................................................................... 2-34
9.2.2 2nd Image Transfer section ........................................................................ 2-35
9.3 Operation......................................................................................................... 2-35
9.3.1 Transfer Belt speed control.........................................................................2-35
9.3.2 1st Image Transfer Roller mechanism........................................................2-36
9.3.3 2nd Image Transfer Roller pressure mechanism........................................ 2-39
9.3.4 AIDC Sensor Shutter mechanism ..............................................................2-40
9.3.5 ATVC (Auto Transfer Voltage Control)........................................................2-41
ii
QC 2235plus Theory of Operation Ver1.0 Mar. 2004
9.3.6 Transfer Belt cleaning .................................................................................2-42
9.3.7 2nd Image Transfer Roller cleaning............................................................2-43
9.3.8 Charge neutralization and separation of paper ..........................................2-44
9.3.9 Detection of New Transfer Belt Unit............................................................2-45
9.3.10 ACS control.................................................................................................2-46
10. Toner Collecting section .....................................................................................2-47
10.1 Composition.....................................................................................................2-47
10.2 Drive ................................................................................................................2-48
10.3 Operation.........................................................................................................2-49
10.3.1 Toner collecting mechanism .......................................................................2-49
10.3.2 Waste Toner Bottle-in-position detection ....................................................2-49
10.3.3 Waste Toner Near-Full/Full detection control..............................................2-50
11. Paper feed section..............................................................................................2-51
11.1 Composition.....................................................................................................2-51
11.1.1 Tray1 ...........................................................................................................2-51
11.1.2 Tray2 ...........................................................................................................2-52
11.2 Drive ................................................................................................................2-54
11.2.1 Tray1 ...........................................................................................................2-54
11.2.2 Tray2 ...........................................................................................................2-54
11.3 Operation.........................................................................................................2-55
11.3.1 Paper Take-up control (Tray1).....................................................................2-55
11.3.2 Tray1 double feed control............................................................................2-55
11.3.3 Deceleration control....................................................................................2-55
11.3.4 Paper supply level detection control...........................................................2-56
11.3.5 Paper Near-Empty/Paper Empty detection.................................................2-56
11.3.6 Tray1 paper type detting .............................................................................2-57
11.3.7 Paper size detection control .......................................................................2-58
11.3.8 Tray2 paper lifting motion control................................................................2-61
12. Bypass section...................................................................................................2-62
12.1 Composition.....................................................................................................2-62
12.2 Drive ................................................................................................................2-63
12.3 Operation.........................................................................................................2-64
12.3.1 Bypass Paper Take-up control....................................................................2-64
12.3.2 Paper Empty detection ...............................................................................2-64
12.3.3 Bypass Paper Lifting Motion Control ..........................................................2-64
12.3.4 Paper size detection ...................................................................................2-66
13. Conveyance section...........................................................................................2-68
13.1 Composition.....................................................................................................2-68
I Outline
II Composition/Operation
iii
QC 2235plus Theory of Operation Ver1.0 Mar. 2004
14. Synchronizing Roller section..............................................................................2-69
14.1 Composition .................................................................................................... 2-69
14.2 Drive................................................................................................................2-69
14.3 Operation.........................................................................................................2-70
14.3.1 Synchronizing Roller control.......................................................................2-70
14.3.2 OHP detection............................................................................................2-71
15. Fusing section....................................................................................................2-72
I Outline
15.1 Composition .................................................................................................... 2-72
15.2 Drive................................................................................................................2-73
15.3 Operation.........................................................................................................2-74
15.3.1 Fusing Roller drive control..........................................................................2-74
15.3.2 Fusing Roller pressure/retraction mechanism............................................2-76
15.3.3 Fusing temperature control ........................................................................ 2-77
15.3.4 Protection against abnormal conditions ..................................................... 2-79
15.3.5 Detection of a New Fusing Unit.................................................................. 2-81
15.3.6 PPM control................................................................................................2-81
II Composition/Operation
16. Paper exit section............................................................................................... 2-82
16.1 Composition .................................................................................................... 2-82
16.2 Drive................................................................................................................2-83
17. Image stabilization control ................................................................................. 2-84
17.1 Overview .........................................................................................................2-84
17.2 Operation.........................................................................................................2-85
17.2.1 Background margin control ........................................................................2-85
17.2.2 AIDC Sensor LED intensity control ............................................................ 2-85
17.2.3 Max. density control ................................................................................... 2-85
17.2.4 g correction control.....................................................................................2-85
17.3 Operation timing.............................................................................................. 2-85
17.4 Operation flow ................................................................................................. 2-86
18. Image processing............................................................................................... 2-87
18.1 Scanner section image processing block diagram .......................................... 2-87
18.2 Write section image processing block diagram ............................................... 2-89
19. Other control ......................................................................................................2-91
19.1 Fan control....................................................................................................... 2-91
19.1.1 Construction............................................................................................... 2-91
19.1.2 Operation.................................................................................................... 2-92
19.2 Power distribution control at machine power up.............................................. 2-93
19.2.1 Parts operated when the Power Switch is turned ON ................................ 2-93
19.3 Counter control................................................................................................2-94
19.3.1 Construction............................................................................................... 2-94
iv
QC 2235plus Theory of Operation Ver.1.0 Mar. 2004 System configuration
I Outline
1. System configuration
1/2 System front view
[10]
[9]
[8]
[7]
[1] Machine [8] Job Separator JS-601
[2] Automatic Duplex Unit AD-501 [9] Finisher FS-601
[3] Paper Feed Cabinet PC-201 [10] Punch Kit PK-4 for FS-601
[4] Paper Feed Cabinet PC-101 [11] Reverse Automatic Document Feeder DF-601
[5] Desk DK-501 [12] Original Cover OC-501
[6] Paper Feed Cabinet PC-401 [13] Working Table WT-501
[7] Finisher FS-501
[11]
[1]
[12] [13]
[2]
[3]
[4]
[5]
[6]
4036fs1001j0
I Outline
1-1
System configuration QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
2/2 System rear view
[10]
[11]
[9]
I Outline
[8]
[7]
[1]
[5]
[6]
PC-101
PC-201
PC-401
[4]
[1] Machine [7] Local Interface Kit EK-501
[2] Vender Kit VK-501
(South Central America, North America,
Europe Only)
[3] Data Terminal DT-105
(South Central America, North America
Only)
[4] Dehumidifier Heater 1C [10] Hard Disk HD-501
[5] Video Interface Kit VI-501 [11] Expanded Memory Unit EM-301
[6] Image Controller X3e 22C-KM
[8] Mechanical Counter
[9] Key Counter Kit KIT-1
[2]
[3]
Dk-501
4036fs1002e0
1-2
QC 2235plus Theory of Operation Ver.1.0 Mar. 2004 Product specifications
2. Product specifications
2.1 Type
Type Desktop-type printer integrated with scanner
Copying System Electrostatic dry-powdered image transfer to plain paper
Printing Process Tandem-type indirect electrostatic recording system
PC Drum Type OPC (organic photo conductor)
Scanning Density Equivalent to 600 dpi
Print Density Equivalent to 600 dpi in main scanning direction × 1800 dpi in sub scanning
Platen Stationary (mirror scan)
Original Scanning Scanning in main scanning direction with a CCD
Registration Rear left edge
Paper Feeding System
(Standard)
Three-way system
Exposure System Four-LED exposure
Developing System HMT developing system
Charging System DC comb electrode Scorotron system with electrode cleaning function
Image Transfer System Intermediate transfer belt system
Paper Separating System Selecting either application of nonwoven fabric bias + low-pressure paper
Fusing System Belt fusing
direction
(one-shot reading system)
Multiple Bypass: 150 sheets
Tray1: 250 sheets
Tray2: 500 sheets
(manual)
separator claws
I Outline
2.2 Functions
Types of Original Sheets, books, and three-dimensional objects
Max. Original Size A3 or 11 × 17
Multiple Copies 1 to 999
Warming-up Time 99 sec. or less (at ambient temperature of 23 °C and rated source voltage)
Image Loss
First Copy Time (Tray1, A4, full size)
Copying Speed for Multicopy Cycle
(A4, 8-1/2 × 11)
Fixed Zoom Ratios Full size ×1.000
Variable Zoom Ratios ×0.250 to ×4.000 in 0.001 increments
Exposure Lamp White rare-gas fluorescent lamp 30 W
Leading edge: 5 mm, Trailing edge: 3 mm,
Rear edge: 3 mm, Front edge: 3 mm
Monochrome print 6.8 sec. or less
Color print 12.8 sec. or less
Monochrome print 1-sided: 35 copies/min; 2-sided: 31 copies/min
Color print 1-sided: 22 copies/min; 2-sided: 22 copies/min
Reduction
Enlargement
Metric Area: ×0.500, ×0.707, ×0.816, ×0.866
Inch Area: ×0.500, ×0.647, ×0.733, ×0.785
Metric Area: ×1.154, ×1.224, ×1.414, ×2.000
Inch Area: ×1.214, ×1.294, ×1.547, ×2.000
1-3
Product specifications QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
2.3 Types of paper
I Outline
Copy paper type
Copy paper
dimensions
Paper Source Tray1 Tray2 Multiple Bypass
Plain paper (60 to 90 g/m
Translucent paper – – –
OHP transparencies
(crosswise feeding only)
Thick paper 1
(91 to 150 g/m
Thick paper 2
(151 to 209 g/m
Thick paper 3
(210 to 256 g/m
Postcards –
Envelopes –
Labels –
Max (width × length) 311 × 457 mm 297 × 432 mm 311 × 457 mm
Min (width × length) 90 × 140 mm 140 × 182 mm 90 × 140 mm
2
2
)
2
) *1
)
2
)
(20 sheets or
❍❍❍
❍
less)
*1: Image is not guaranteed when thick paper 3 is used.
Optional Paper Feed Cabinet: Only the plain paper weighing 60 to 90 g/m
Automatic Duplex Unit: Only the plain paper weighing 64 to 90 g/m
2.4 Maintenance
Machine Durability 800,000 prints or 5 years, whichever is earlier
–
–
–
–
2
is reliably fed.
2
is reliably fed.
❍
(20 sheets or
less)
❍
(10 sheets or
less)
❍
(20 sheets or
less)
2.5 Machine specifications
Power Requirements Voltage: AC100 V ±10 %
Frequency: 50/60 Hz ±0.3 Hz
Max Power Consumption 15 kW (100 V, 15 A)
Dimensions 903 (W) × 730 (D) × 770 (H) mm
Space Requirements 1014 (W) × 1151 (D) mm
Mass Approx. 100 kg (without IU)
2.6 Operating environment
Temperature 10 to 30 °C (with a fluctuation of 10 °C/h)
Humidity 15 to 85 % (with a fluctuation of 20 %/h)
1-4
QC 2235plus Theory of Operation Ver.1.0 Mar. 2004 Product specifications
2.7 Built-in controllers
Printer Driver PCL5c printer driver
Scan Driver TWAIN driver
OS Compatibility Windows 98/Me, Windows NT/2000/XP, Windows Server 2003
Interface Ethernet 10/100BaseTX
NOTE
• These specifications are subject to change without notice.
I Outline
1-5
Center cross section QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
3. Center cross section
[1]
I Outline
[2]
[10]
[9]
[8]
[1] CCD Unit [6] Multiple Bypass
[2] Fusing Unit [7] Tray2
[3] Imaging Unit/Bk [8] Imaging Unit/M
[4] Imaging Unit/C [9] Imaging Unit/Y
[5] Tray1 [10] Transfer Belt Unit
[7]
[3]
[4]
[5]
4036ma101c0
[6]
1-6
QC 2235plus Theory of Operation Ver.1.0 Mar. 2004 Paper path
4. Paper path
I Outline
1-7
4036ma102c0
Image creation process QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
5. Image creation process
[1] Photoelectric Conversion
[2] IR Image Processing
I Outline
[11] Transfer
Belt Cleaning
[8] 1st Image Transfer
[4] PC Drum
[3] Printer Image Processing
Photoelectric
[1]
Conversion
IR Image
[2]
Processing
Printer Image
[3]
Processing
[4] PC Drum
[5] PC Drum Charging • A negative DC charge layer is formed on the surface of the PC Drum.
[6] LED Exposure
[7] Developing
[8] 1st Image Transfer
[9] 2nd Image Transfer
[7] Developing
[6] LED Exposure
• The light reflected off the surface of the original is separated into different
colors using the color filters (R, G, and B); CCD then converts it into a corresponding electric signal and outputs the signal to the IR Imaging Processing Section.
• The electric signal is converted to 8-bit digital image signals. After going
through some corrections, video signals (C, M, Y, and Bk) are output to
the Printer Image Processing Section.
• The video signals (C, M, Y, and Bk) go through some corrections. Following digital-to-analog conversion, these signals are used for the control of
the intensity level of the LED.
• The image of the original projected onto the surface of the PC Drum is
changed to a corresponding electrostatic latent image.
• The surface of the PC Drum is irradiated with LED light and an electrostatic latent image is thereby formed.
• The toner, agitated and negatively charged in the Developer Mixing Chamber, is attracted onto the electrostatic latent image formed on the surface of
the PC Drum. It is thereby changed to a visible, developed image.
• AC and DC negative bias voltages are applied to the Developing Roller,
thereby preventing toner from sticking to the background image portion.
• A DC positive voltage is applied to the backside of the Transfer Belt,
thereby allowing the visible, developed image on the surface of each of
the PC Drums (Y, M, C, and Bk) to be transferred onto the Transfer Belt.
• A DC positive voltage is applied to the backside of the paper, thereby
allowing the visible, developed image on the surface of the Transfer Belt to
be transferred onto the paper.
[5] PC Drum Charging
[10] Paper Separation
[9] 2nd Image Transfer
[12] PC Drum Cleaning
[13] Main Erase
1-8
QC 2235plus Theory of Operation Ver.1.0 Mar. 2004 Image creation process
[10] Paper Separation
Transfer Belt
[11]
Cleaning
[12] PC Drum Cleaning • The residual toner left on the surface of the PC Drum is scraped off.
[13] Main Erase
• The paper, which has undergone the 2nd image transfer process, is neutralized so that it can be properly separated from the Transfer Belt by the
Paper Separator Claws.
• A charge is applied to the Transfer Belt. By potential difference, residual
toner on the surface of the Transfer Belt is collected for cleaning.
• The surface of the PC Drum is irradiated with light, which neutralizes any
surface potential remaining on the surface of the PC Drum.
I Outline
1-9
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