KONICA MINOLTA D 1531 Service Manual
DEVELOP
Service Manual
General
D 1531iD · D1831iD
4890 4A06 91100/DP/0102
INDEX (GENERAL)
GENERAL
MECHANICAL/ELECTRICAL
GENERAL
14413
CONTENTS
1. SPECIFICATION .............................................................................................G-1
2. PRECAUTIONS FOR INSTALLATION ............................................................G-5
2-1. Installation Site ........................................................................................G-5
2-2. Power Source ..........................................................................................G-5
2-3. Grounding ................................................................................................G-5
3. PRECAUTIONS FOR USE ..............................................................................G-6
3-1. To ensure that the copier is used in an optimum condition .....................G-6
3-2. Operating Environment ............................................................................G-6
3-3. Power Requirements ............................................................................... G-6
3-4. Note .........................................................................................................G-6
4. HANDLING OF CONSUMABLES ....................................................................G-7
5. OTHER PRECAUTIONS .................................................................................G-8
6. SYSTEM OPTIONS .........................................................................................G-9
i
1. SPECIFICATION
TYPE
ORIGINAL SCANNING SYSTEM
PHOTOCONDUCTOR
COPYING SYSTEM
RESOLUTION
PAPER FEEDING SYSTEM
EXPOSURE SYSTEM
DEVELOPING SYSTEM
CHARGING SYSTEM
IMAGE TRANSFER SYSTEM
PAPER SEPARATING SYSTEM
FUSING SYSTEM
PAPER DISCHARGING SYSTEM
MAX. ORIGINAL SIZE
COPY MEDIUM
Paper Source Drawer Manual Bypass
Plain Paper (60 to 90 g/m
Transparencies
Ty p e
Dimensions
MULTIPLE COPIES
WARMING-UP TIME
FIRST COPY TIME
CONTINUOUS COPY SPEED (copies/min)
Size
A4C
A4L
A3L
B4L
B5C
B5L
8-1/2 × 11C
8-1/2 × 11L
11 × 17L
8-1/2 × 14L
11 × 14
Thick Paper (91 to 157 g/m
Recycled Paper (60 to 90 g/m
Maximum (Width × Length) 297 × 432 mm 297 × 432 mm
Minimum (Width × Length) 90 × 140 mm 90 × 140 mm
:
Console/Desktop Type
:
CCD Line Sensor
:
Organic Photoconductor
:
Electrostatic Dry Powdered Image Transfer to Plain
Paper with a Laser
:
600 × 600 dpi
:
2-way system
Manual Bypass...Single
Drawer................250 Sheets
:
Mirror Scanning
:
MT-HG System
:
Comb Electrode (1) DC Negative Corona with
Scorotron System
:
Roller Image Transfer
:
Paper Separator Fingers and Charge Neutralizing
Plate
:
Heat Roller
:
Charge Neutralizing Brush
:
A3L, 11 × 17
Postcards
:
1 to 99
:
30 sec. or less (23, Rated Voltage)
:
7 sec. or less (A4C, Drawer, full size mode)
Di152 Di183
15
12
9
10
16
13
15
12
9
10
10
2
)
2
)
2
)
Speed
❍❍
❍❍
❍❍
❍❍
❍❍
18
14
10
12
20
15
18
14
10
12
12
G-1
ZOOM RATIOS
Metric Inch
Full Size 100 % 100 %
200 %
Fixed
Enlargement
Reduction
Variable 50 % to 200 % (in 1 % increments)
141 %
115 %
81 %
70 %
50 %
200 %
129 %
121 %
78 %
64 %
50 %
LENS
EXPOSURE LAMP
POWER/CURRENT CONSUMPTION (copier only)
Exposure Lamp
(Rating)
24 V
14.4 W
POWER REQUIREMENTS : 110 V, 120 V, 127 V, 220 V to 240 V, 50/60 Hz
ENVIRONMENTAL CONDITIONS
Temperature 10 to 30 °C with a fluctuation of 10 °C or less per hour
Humidity 15 to 85 % RH with a fluctuation of 10 % RH or less per hour
Ambient Illumination 3,000 lux or less
Levelness 1° (1.75 mm/100 mm)
COPIER DIMENSION
COPIER WEIGHT
Fusing Roller
Heater Lamp
::Through Lens
Fluorescent Lamp
(Rating)
900 W
::W...590 mm (23-1/4)
D....611 mm (24)
H....487 mm (19-1/4)
39 kg (86 lb)
Max. Power
Consumption
(full system)
110 V: 970 W
120 V: 1090 W
127 V: 1180 W
220 V: 990 W
230 V: 1050 W
240 V: 1120 W
Max. Current
Consumption
(full system)
110 V: 8.9 A
120 V: 9.1 A
127 V: 9.3 A
220 V: 4.5 A
230 V: 4.6 A
240 V: 4.7 A
G-2
Multiple Bypass (MB-5): option
TYPE
INSTALLATION
COPY PAPER TYPE
Plain Paper (60 to 90 g/m
Transparencies 20 sheets
Ty p e
Thick Paper (91 to 157 g/m
Recycled Paper (60 to 90 g/m
Dimensions
Size
Maximum (Width × Length) 297 × 432 mm
Minimum (Width × Length) 90 × 140 mm
A3L, B4L, FLS, A4L, A4C, B5L, B5C, A5C,11 × 17, 11 × 14, 8-1/2 × 14,
8-1/2 × 11L, 8-1/2 × 11C, 8-1/2 × 5-1/2
DOCUMENT ALIGNMENT
CAPACITY
POWER REQUIREMENTS
MAX. POWER CONSUMPTION
DIMENSIONS
WEIGHT
OPERATING ENVIRONMENT
::Multiple Bypass
Mounted on the copier
2
)
2
)
50 sheets
20 sheets
Postcards 20 sheets
2
)
Center
:
:
50 sheets (80 g/m
:
DC24 V, DC5 V (supplied from copier)
:
9 W or less
:
W...245 mm (9-3/4)
2
)
50 sheets
D....435 mm (17-1/4)
H....137 mm (5-1/2)
:
2.7 kg (6 lb)
:
Same as copier
G-3
Job Tray (JS-202): option
TYPE
INSTALLATION
::Multiple Bypass
Mounted on the copier
CAPACITY
Exit Tray
of the machine
1Stacking height up
Plain Paper (60 to 90 g/m
150 sheets (A4C/L)
2
75 sheets
)
(except A4C/L)
to 22 mm
100 sheets (A4C/L)
50 sheets
(except A4C/L)
Transparencies
Ty p e
Thick Paper (91 to 157 g/m
2
)
20 sheets 10 sheets
Postcards
Stacking height up to
Recycled Paper (60 to 90 g/m
150 sheets (A4C/L)
2
75 sheets
)
(except A4C/L)
22 mm
100 sheets (A4C/L)
50 sheets
(except A4C/L)
Dimensions
Maximum (Width × Length) 297 × 432 mm
Minimum (Width × Length) 90 × 140 mm 140 × 140 mm
Exit Tray by Application Mode
Application Mode
Exit Tray
of the machine
Job Tray
Fax and Copier Copier Fax
Printer and Copier Copier Printer
Fax, Copier and Printer Copier Fax and Printer
Job Tray
POWER REQUIREMENTS : DC24 V, DC5 V (supplied from copier)
Shifting Unit (OT-103): option
TYPE
INSTALLATION
POWER REQUIREMENTS
:
Multiple Bypass
:
Mounted on the copier
:
DC24 V, DC5 V (supplied from copier)
G-4
2. PRECAUTIONS FOR INSTALLATION
2-1. Installation Site
To ensure safety and utmost performance of the copier, the copier should NOT be used in a
place:
• Where it will be subjected to extremely high or low temperature or humidity.
• Where it will be subjected to sudden fluctuations in either temperature or humidity.
• Which is exposed to direct sunlight.
• Which is in the direct air stream of an air conditioner, heater, or ventilator.
• Which has poor ventilation or is dusty.
• Which does not have a stable, level floor or where it will receive undue vibration.
• Which is near any kind of heating device.
• Which is near volatile flammables (thinner, gasoline, etc.).
• Where it may be splashed with water.
• Which puts the operator in the direct stream of exhaust from the copier.
• Where ammonia gas might be generated.
2-2. Power Source
• If any other electrical equipment is sourced from the same power outlet, make sure that
the capacity of the outlet is not exceeded.
• Use a power source with little voltage fluctuation.
• Never connect by means of a multiple socket any other appliances or machines to the
outlet being used for the copier.
• Ensure that the copier does not ride on the power cord or communication cable of other
electrical equipment, and that it does not become wedged into or underneath the mechanism.
• Make the following checks at frequent intervals:
✽
Is the power plug abnormally hot?
✽
Are there any cracks or scrapes in the cord?
✽
Has the power plug been inserted fully into the outlet?
✽
Does something, including the copier itself, ride on the power cord?
Use an outlet with a capacity of 110 to 127 V, 15 A or more. 220 to 240 V, 10 A or more.
2-3. Grounding
• Always ground the copier to prevent receiving electrical shocks in the case of electrical
leakage.
• Connect the ground wire to the ground terminal of the outlet or a grounding contact which
complies with the local electrical standards.
• Never connect the ground wire to a gas pipe, the ground wire for a telephone, lightning
arrester, or a water pipe for fear of fire and electrical shock.
G-5
3. PRECAUTIONS FOR USE
3-1. To ensure that the copier is used in an optimum condition
• Never place a heavy object on the copier or subject the copier to shocks.
• Insert the power plug all the way into the outlet.
• Do not attempt to remove any panel or cover which is secured while the copier is making
copies.
• Do not turn OFF the copier while it is making copies.
• Provide good ventilation when making a large number of copies continuously.
• Never use flammable sprays near the copier.
• If the copier becomes inordinately hot or produces abnormal noise, turn it OFF and
unplug it.
• Do not turn ON the power switch at the same time when you plug the power cord into the
outlet.
• When unplugging the power cord, do not pull on the cord; hold the plug and pull it out.
• Do not bring any magnetized object near the copier.
• Do not place a vase or vessel containing water on the copier.
• Be sure to turn OFF the power switch at the end of the workday or upon power failure.
• Use care not to drop paper clips, staples, or other small pieces of metal into the copier.
3-2. Operating Environment
The operating environmental requirements of the copier are as follows.
• Temperature: 10 to 30 °C
• Humidity: 15 to 85 % RH
• Rate of temperature change: 10 °C/h
• Rate of humidity change: 10 % RH/h
3-3. Power Requirements
The power source voltage requirements are as follows.
• Voltage fluctuation: AC110 to 127 V/220 to 240 V ± 10 %
(copying performance assured)
• Frequency fluctuation: 50/60 Hz ± 0.3 %
+10 %/-15 % (paper feeding performance assured)
3-4. Note
• It is prohibited to copy paper and hard currencies, government securities, and municipal
bonds (even when they are stamped as “Sample”).
• For fear of infringement of copyright, it is also prohibited to copy copyrighted works,
including books, music, works of art, maps, drawings, motion pictures, and photos except
when the copy is to be used only personally.
G-6
4. HANDLING OF CONSUMABLES
Before using any consumables, always read the label on its container carefully.
• Paper can be easily damaged by dampness. To prevent absorption of moisture, store
paper, which has been removed from its wrapper but not loaded in the drawer, in a
sealed plastic bag in a cool, dark place.
• Keep consumables out of the reach of children.
• Do not touch the PC Drum with bare hands.
• The same sized paper is of two kinds, short grain and long grain. Short grain paper
should only be fed through the copier crosswise, long grain paper should only be fed
lengthwise.
• If your hands become soiled with toner, wash them with soap and water.
• Do not throw away any used consumables (PC Drum, starter, toner, etc.). They are to be
collected.
• Do not burn, bury in the ground, or throw into the water any consumables (PC Drum,
starter, toner, etc.).
• Do not store consumables in a place which:
✽
Is hot and humid.
✽
Is subject to direct sunlight.
✽
Has an open flame nearby.
G-7
5. OTHER PRECAUTIONS
Use the following precautions when performing service jobs for a copier that uses a laser.
• When a service job needs to be performed in the laser beam path, such as when working
around the printerhead or PC Drum, be sure first to unplug the power cord of the copier
from the outlet.
• If the job requires that the power cord be left plugged in, observe the following precautions.
1. Take off your watch, ring and any other reflective object and wear laser protective gog-
gles.
2. Keep users away from the job site.
3. Do not bring a highly reflective tool into the laser beam path during the service job.
G-8
6. SYSTEM OPTIONS
1
2
4021O009AA
3
1144M172AC
4021O010AA
7
4
4695U011AA
4021O013AB
6
4021O063AA
4021O012AA
5
1. Plug-In Counter
2. Original Cover OC-5
3. Automatic Document Feeder AF-10
4. Multiple Bypass MB-5
5. Copy Desk
6. Paper Feed Cabinet PF-120
7. Data Terminal DT-201
8. Job Tray JS-202
(Illustration none)
4021O014AA
9. Sifting Unit OT-103
(Illustration none)
10. Memory M16-4, M32-3
(Illustration none)
11. Mechanical Counter CNT1
(Illustration none)
G-9
MECHANICAL/
ELECTRICAL
14413
CONTENTS
1. CROSS SECTIONAL VIEW ............................................................................M-1
2. COPY PROCESS ............................................................................................M-2
3. DRIVE SYSTEM ..............................................................................................M-4
4. SEQUENTIAL EXPLANATION ........................................................................M-5
5. WATCHDOG FUNCTION (CPU OVERRUN MONITOR) ................................M-6
5-1. Watchdog Function Post-Processing .......................................................M-6
6. IMAGE STABILIZATION SYSTEM ..................................................................M-7
7. IMAGING UNIT (I/U) ........................................................................................M-8
7-1. Imaging Unit (IU) Drive Mechanism .........................................................M-9
8. PC DRUM SECTION .......................................................................................M-10
8-1. PC Drum Drive Mechanism .....................................................................M-10
8-2. Grounding of the PC Drum ......................................................................M-11
9. PC DRUM CHARGING SECTION ...................................................................M-12
10. IMAGE READING SECTION ...........................................................................M-13
10-1.Image Processing Process ......................................................................M-14
10-2.Exposure Components Section ...............................................................M-15
10-3.Scanner and Mirrors Carriage Movement Mechanism ............................M-16
(1) Scanner Movement Mechanism ......................................................M-16
(2) 2nd/3rd Mirrors Carriage Movement Mechanism ............................M-16
10-4.Scanner Motor Drive Control ...................................................................M-17
11. MEMORY STORAGE IMAGE PROCESSING SYSTEM .................................M-18
11-1.Laser Exposure Process .........................................................................M-19
12. DEVELOPING UNIT SECTION .......................................................................M-20
12-1.Developing Unit Drive Mechanism ..........................................................M-21
12-2.Sleeve/Magnet Roller ..............................................................................M-22
12-3.Developing Bias .......................................................................................M-22
12-4.ATDC Sensor ..........................................................................................M-23
(1) ATDC Sensor Automatic Adjustment ..............................................M-23
12-5.Toner Replenishing Mechanism ..............................................................M-24
12-6.Toner Replenishing Control .....................................................................M-25
12-7.T/C Recovery Mode .................................................................................M-26
12-8.Toner Bottle Home Position Detection Mechanism .................................M-27
13. PAPER TAKE UP/FEED SECTION .................................................................M-28
13-1.Drawer In Position Detection ...................................................................M-29
13-2.Paper Empty Detection Mechanism ........................................................M-29
13-3.Paper Lifting Plate ...................................................................................M-30
13-4.Universal Tray Paper Size Detection Mechanism ...................................M-30
13-5.Paper Take Up Mechanism .....................................................................M-32
(1) Paper Separating Mechanism .........................................................M-32
13-6.Paper Take Up Control ............................................................................M-33
(1) Paper Take Up Retry Control ..........................................................M-33
14. MANUAL BYPASS SECTION ......................................................................... M-34
14-1.Paper Take Up Drive Mechanism ............................................................ M-34
14-2.Paper Detection Mechanism ...................................................................M-34
14-3.Manual Feed Take Up Control ................................................................M-35
15. MULTIPLE BYPASS SECTION .......................................................................M-36
i
15-1.Paper Take Up Drive Mechanism ............................................................ M-36
15-2.Paper Take-Up Mechanism ..................................................................... M-37
15-3.Paper Empty Detection Mechanism ........................................................M-38
15-4.Paper Take Up Control ............................................................................M-38
15-5.Paper Take Up Retry Control ..................................................................M-39
16. IMAGE TRANSFER AND PAPER SEPARATION SECTION ..........................M-40
17. PC DRUM CLEANING SECTION ....................................................................M-41
18. MAIN ERASE SECTION ..................................................................................M-42
19. FUSING UNIT SECTION .................................................................................M-43
19-1.Fusing Unit Drive Mechanism ..................................................................M-44
19-2.Fusing Rollers Pressure Mechanism ....................................................... M-44
19-3.Fusing Temperature Control ....................................................................M-45
19-4.CPM Control ............................................................................................M-45
20. JOB TRAY (JS-202): Option ............................................................................M-46
20-1.Tray Selecting Mechanism ......................................................................M-47
20-2.Tray-Full Detecting Mechanism ...............................................................M-48
20-3.Job Tray Paper Detecting Mechanism ....................................................M-48
21. SHIFTING UNIT (OT-103): Option ..................................................................M-49
21-1.Exit Position Shifting Mechanism ............................................................M-50
22. OTHER MECHANISM .....................................................................................M-52
22-1.Cooling Mechanism .................................................................................M-52
(1) Power Supply Section Cooling Mechanism .....................................M-52
(2) Fusing Section Cooling Mechanism ................................................M-53
ii
1. CROSS SECTIONAL VIEW
1
2
5
1. IR Section
2. Fusing Unit
3. Imaging Unit
3
4
4. Paper Take-Up/Feed Section
5. PH Section
4021M001AA
M-1
2. COPY PROCESS
4021M065CB
1. PC Drum
• Used as the medium on which a visible developed image of the original is formed.
2. Drum Charging
• A uniform negative DC charge is deposited across the entire surface of the PC Drum.
3. Photoelectric Conversion
• CCD converts the image data represented by light reflected off the original to a corresponding electrical signal which, in turn, is output to IR image-processing section.
4. IR Image-Processing
• The electrical signal is converted to an 8-bit digital image signal (A/D conversion) which,
in turn, goes through appropriate correction before being output to the PH Image Processing.
5. PH Image Processing
• After going through corrections, the digital image signal is converted to a corresponding
electrical signal (D/A conversion) that controls the intensity of the light from the laser
diode.
6. Laser Exposure
• The laser beam strikes the surface of the PC Drum, forming an electrostatic latent image.
7. Developing
• Toner negatively charged in the Developer Mixing Chamber is attracted onto the electrostatic latent image changing it to a visible, developed image.
• An AC/DC negative bias voltage is applied to the Sleeve/Magnet Roller to prevent toner
from being attracted onto those areas of the PC Drum which correspond to the background areas of the original.
8. Paper Feed
• Paper is fed from the drawer.
M-2
9. Bypass Paper Feed
• Feeds paper from the Manual Bypass Tray, one piece at a time.
• The optional Multiple Bypass Tray (MB-5), when mounted on the machine, permits continuous paper feeding.
10. Image Transfer
• A DC positive charge is applied to the Image Transfer Roller to transfer the visible image
on the surface of the PC Drum onto the paper.Paper Separation.
11. Paper Separation
• The PC Drum Paper Separator Fingers remove paper from the surface of the PC Drum.
• The Charge Neutralizing Plate neutralizes any charge left on the paper.
12. Cleaning
• Residual toner on the surface of the PC Drum is scraped off.
• The toner is then recycled back to the Developing Unit.
13. Main Erase
• Light is directed to the surface of the PC Drum to neutralize any surface potential remaining there after cleaning.
14. Paper Transport
• The paper is fed to the Fusing Unit.
15. Fusing
• The developed image is permanently fused to the paper by a combination of heat and
pressure applied by the Right and Left Fusing Rollers.
16. Paper Exit
• The paper is fed out onto the Exit Tray.
• When the optional Job Tray (JS-202) is mounted, the specific tray into which paper is fed
is selected according to the application mode.
• The optional Shifting Unit (OT-103), when mounted, permits different finishing functions
set on the machine (Non-Sort, and Sort).
M-3
3. DRIVE SYSTEM
1
Paper Exit Roller Gear
Transport Roller Gear
Fusing Roller Gear
1. Scanner Motor M5
2. Main Motor M1
PC Drum
Synchronizing Roller Clutch
Paper Take-Up Roller Gear
2
4021M003AA
M-4
4. SEQUENTIAL EXPLANATION
4021M510CA
Power Switch ON Start Key ON
Polygon Motor M2
Predrive
150 ˚C Warm-up completed
Exposure Lamp LA2
Main Motor M1
Paper Take-Up Solenoid SL1
Synchronizing Roller Sensor PC1
Synchronizing Roller Clutch CL1
Developing Bias (VB) DC
Developing Bias (VB) AC
Image Transfer Bias (+)
Image Transfer Bias (–)
Exit Paper Sensor PC3
M-5
Full speed
Full speed
Speed reduction
Speed reduction
Power Supply Cooling
Fan Motor M4
Fusing Cooling Fan
Motor M3
5. WATCHDOG FUNCTION (CPU OVERRUN MONITOR)
• The watchdog function, or CPU overrun monitor function, monitors whether any of the
CPUs mounted in the copier overruns.
• If the function detects that a CPU overruns, the copier automatically resets the CPU,
thereby restarting the logic circuit and mechanism.
5-1. Watchdog Function Post-Processing
The following processing is performed if a faulty condition is detected in the CPU.
When the copier CPU is found faulty:
• All CPUs are reset and the system is restarted.
• If the CPU is found faulty during a copy cycle, the system attempts to feed all sheets of
paper out of the copier before restarting. (If paper is left inside the copier, the copier
detects it as a misfeed as it is restarted.)
M-6
6. IMAGE STABILIZATION SYSTEM
The following image stabilization controls are provided to ensure stabilized copy image.
Purpose Means Control
The Vg/Vb control voltage is varied to bring
Vg/Vb to an appropriate level according to
the following settings.
To stabilize image density. Vg/Vb control
To stabilize image transfer.
Image transfer
output control
• Tech. Rep. Choice: ID Adjustment
• Tech. Rep. Choice: VG Adjustment
• User's Choice: Print Density
• IU Life Counter
• Paper type
The image transfer output is varied to bring
the image transfer current to an appropriate
level according to the following conditions.
• Paper type
• Paper width
• B/W ratio of image
M-7
4021M066CA
7. IMAGING UNIT (I/U)
• The IU integrates the PC Drum, Developing Unit, PC Drum Charge Corona, and the PC
Drum Cleaning Mechanism, all in one body.
PC Drum
PC Drum Cleaning Mechanism
4021M006AB
PC Drum Charge Corona
Developing Unit
4021M007AB
M-8
7-1. Imaging Unit (IU) Drive Mechanism
• The IU is driven by the Main Motor.
Main Motor M1
4021M008AB
Elevtrical Component Control Signal
M1
PWB-A PJ7A-5 L L H
PWB-A PJ7A-7 H L H
Forward
Rotation
M-9
Backward
Rotation
OFF Wiring Diagram
17-G
8. PC DRUM SECTION
• The PC Drum consists of layers of semiconductive materials placed on an aluminum
alloy base, on which an electrostatic latent image is formed.
PC Drum
(PC Drum Cross-Section)
Charge Transport Layer
Charge Generation Layer
1167M007AA
8-1. PC Drum Drive Mechanism
• The PC Drum is rotated by drive from a motor.
PC Drum
Aluminum Base
1139M007AA
Main Motor M1
Elevtrical Component Control Signal
M1
PWB-A PJ7A-5 L H
PWB-A PJ7A-7 H H
Forward
Rotation
M-10
4021M009AA
OFF Wiring Diagram
17-G
8-2. Grounding of the PC Drum
• The potential on the surface of the PC Drum exposed to the light is grounded to the
frame.
PC Drum
Frame
Ground Plate
4021M010AA
M-11
9. PC DRUM CHARGING SECTION
• The PC Drum Charge Corona has a scorotron grid to deposit a charge evenly across the
surface of the PC Drum.
• The corona unit has a comb electrode that discharges only toward the grid mesh, thus
minimizing the amount of ozone produced.
Comb Electrobe
Grid Mesh
Elevtrical Component Control Signal ON OFF Wiring Diagram
HV1 PWB-A PJ8A-8 L H 5-C
4021M011AA
M-12
10. IMAGE READING SECTION
6
5
1. Scanner /Motor M5
2. CCD Board PWB-J
3. Size Reset Switch S10
1
4. Scanner
5. 2nd/3rd Mirrors Carriage
6. Scanner Home Position Sensor PC6
2
3
4
4021M012AB
M-13
10-1. Image Processing Process
1. Photoelectric Conversion
• Light reflected off the original is read by the CCD Sensor which converts the data to a
corresponding analog signal.
2. Analog-to-Digital Conversion
• The analog signal output from the CCD Sensor is converted to a corresponding 8-bit digital signal.
3. Shading Correction
• An error is corrected that occurs due to variations in sensitivity of each CCD chip and the
light distribution varying along the length of the Exposure Lamp.
• The data obtained through actually illuminating the shading sheet with the Exposure
Lamp is compared with the shading sheet reading reference value (white = max. data
value) to make the necessary correction.
4. Zoom Processing
• The synchronous timing of the input data (read) and output data (read) is varied to
decrease (reduction) or increase (enlargement) the number of data readings, thereby
reducing or enlarging the image in the main scanning direction.
5. Data is sent to the PH.
M-14
Loading...