Ricoh FT1008/208 Service Manual Plover

FT1008/FT1208

(Plover, A226/A227)

Service Manual

Issued April 8, 1998, Ricoh CO., LTD.

IMPORTANT SAFETY NOTES

PREVENTION OF PHYSICAL INJURY

1. Before disassembling or assembling any parts of the copier, make sure that the
power cord is unplugged.

2. The wall outlet should be near the copier and easily accessible.

3. If any adjustment or operation check has to be made with exterior covers off or
open while the main switch is turned on, keep hands away from electrified or
mechanically driven components.

4. If the Start key is pressed before the copier completes the warm-up period the
Ready indicator will alternately light green and red. When in this condition, keep
hands away from mechanical and electrical components, as the copier will start
making copies as soon as the warm-up period is completed.

5. The inside and the metal parts of the fusing unit become extremely hot while
the copier is operating. Be careful to avoid touching those components with
your bare hands.

HEALTH SAFETY CONDITIONS

1. Toner and developer are non-toxic, but if you get either of them in your eyes by
accident, it may cause temporary eye discomfort. Try to remove with eye drops
or flush with water as first aid. If unsuccessful, get medical attention.

2. Never operate the copier without the ozone filter installed.

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

1. The copier must be maintained by a trained customer service representative.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL

1. Do not incinerate the CTDM. Toner dust may ignite suddenly when exposed to
open flame.

2. Dispose of the CTDM and organic photoconductor in accordance with local
regulations. (These are non-toxic supplies.)

3. Dispose of replaced parts in accordance with local regulations.

TABLE OF CONTENTS

1. OVERALL MACH INE INFORMATION........................................1-1

1.1 SPECIFICATIONS.................................................................................... 1-1

1.2 COPY PROCESSES AROUND THE DRUM............................................ 1-3

1.3 MECHANICAL COMPONENT LAYOUT................................................... 1-5

1.4 ELECTRICAL COMPONENT LAYOUT.................................................... 1-6

1.5 ELECTRICAL COMPONENT DESCRIPTIONS........................................ 1-7

2. DETAILED DESCRIPTION.......................................................... 2-1

2.1 DRUM.......................................................................................................2-1

2.1.1 OPC DRUM CHARACTERISTICS................................................... 2-1

2.2 CHARGE .................................................................................................. 2-2

2.2.1 OVERVIEW ..................................................................................... 2-2

2.3 OPTICS .................................................................................................... 2-3

2.3.1 OVERVIEW ..................................................................................... 2-3

2.3.2 SCANNER DRIVE ........................................................................... 2-4

2.3.3 LENS AND 4TH/5TH MIRROR DRIVE (A227 MACHINE ONLY).... 2-5

2.3.4 AUTOMATIC IMAGE DENSITY CONTROL SYSTEM (ADS).......... 2-6

2.3.5 EXPOSURE LAMP VOLTAGE CONTROL...................................... 2-7

2.4 ERASE.................................................................................................... 2-12

2.4.1 OVERVIEW ................................................................................... 2-12

2.4.2 LEAD EDGE ERASE..................................................................... 2-13

2.4.3 SIDE ERASE (A227 MACHINES ONLY)....................................... 2-13

2.4.4 TRAILING EDGE ERASE..............................................................2-13

2.5 DEVELOPMENT..................................................................................... 2-14

2.5.1 OVERVIEW ................................................................................... 2-14

2.5.2 TONER SUPPLY MECHANISM.................................................... 2-15

2.5.3 DEVELOMENT BIAS FOR IMAGE DENSITY CONTROL............. 2-16

2.5.4 TONER END CONDITION............................................................. 2-18

2.6 IMAGE TRANSFER................................................................................ 2-20

2.7 DRUM CLEANING.................................................................................. 2-21

2.8 QUENCHING.......................................................................................... 2-22

2.9 PAPER FEED AND REGISTRATION..................................................... 2-23

2.9.1 OVERVIEW ................................................................................... 2-23

2.9.2 PAPER FEED MECHANISM......................................................... 2-24

2.9.3 REGISTRATION MECHANISM..................................................... 2-25

2.9.4 BY-PASS FEED............................................................................. 2-26

2.9.5 PAPER FEED AND MISFEED DETECTION TIMING.................... 2-27

2.10 IMAGE FUSING.................................................................................... 2-28

2.10.1 OVERVIEW ................................................................................. 2-28

2.10.2 FUSING LAMP CONTROL.......................................................... 2-29

2.10.3 FUSING LAMP CONTROL CIRCUIT........................................... 2-30

3. INSTALLA TION...........................................................................3-1

3.1 INSTALLATION REQUIREMENTS .......................................................... 3-1

i

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1.2.1 ENVIRONMENT ..............................................................................3-1

1.2.2 MACHINE LEVEL............................................................................ 3-1

1.2.3 MINIMUM SPACE REQUIREMENTS.............................................. 3-2

1.2.4 POWER REQUIREMENTS.............................................................. 3-2

3.2 MACHINE INSTALLATION....................................................................... 3-2

0 XXX 0000

4. SERVICE TABLES......................................................................4-1

4.1 SERVICE REMARKS............................................................................... 4-1

4.1.1 GENERAL CAUTIONS.................................................................... 4-1

4.1.2 DRUM.............................................................................................. 4-1

4.1.3 CTDM (CLEANING TONER DEVELOPMENT MAGAZINE)............ 4-2

4.1.4 CHARGE CORONA UNIT ............................................................... 4-2

4.1.5 ERASE LAMP.................................................................................. 4-2

4.1.6 OPTICS ........................................................................................... 4-3

4.1.7 TRANSFER CORONA..................................................................... 4-3

4.1.8 FUSING UNIT.................................................................................. 4-3

4.1.9 PAPER FEED.................................................................................. 4-3

4.1.10 OTHERS........................................................................................ 4-4

4.2 PROGRAM MODES................................................................................. 4-5

4.2.1 BASIC OPERATION........................................................................ 4-5

4.2.2 SP MODE........................................................................................ 4-6

4.2.3 SP MODE QUICK REFERENCE TABLE......................................... 4-8

4.2.4 UP MODE AND SP MODE CROSS REFERENCE TABLE.............4-9

4.2.5 SERVICE PROGRAM MODE........................................................ 4-10

4.2.6 CLEAR ALL MEMORY PROCEDURE........................................... 4-25

4.3 SERVICE TABLES................................................................................. 4-26

4.3.1 VARIABLE RESISTORS................................................................ 4-26

4.4 SERVICE CALL CONDITIONS............................................................... 4-27

4.5 ERROR CODE FOR USER....................................................................4-32

5. SERVICE MA INTENANCE..........................................................5-1

5.1 MAINTENANCE ITEMS AND METHODS ................................................ 5-1

6. REPLACEMENT A ND ADJUSTMENT........................................ 6-1

6.1 EXTERIOR ............................................................................................... 6-1

6.1.1 EXTERIOR COVER/EXPOSURE GLASS REMOVAL..................... 6-1

6.1.2 UPPER UNIT REMOVAL................................................................. 6-2

6.2 OPTICS .................................................................................................... 6-3

6.2.1 EXPOSURE LAMP REMOVAL........................................................ 6-3

6.2.2 1ST MIRROR REMOVAL................................................................ 6-4

6.2.3 EXPOSURE LAMP THERMOFUSE REMOVAL.............................. 6-5

6.2.4 2ND AND 3RD MIRRORS REMOVAL............................................. 6-6

6.2.5 4TH MIRROR REMOVAL................................................................ 6-7

6.2.6 5TH MIRROR REMOVAL (A227 MODEL)....................................... 6-8

6.2.7 5TH MIRROR REMOVAL (A226 MODEL)....................................... 6-9

6.2.8 LENS AND 4TH/5TH MIRROR POSITION ADJUSTMENT (A227

MODEL)................................................................................................... 6-10

6.2.9 LENS AND MIRROR MOTOR REMOVAL..................................... 6-11

6.2.10 SCANNER WIRE REMOVAL....................................................... 6-12

ii

6.3 AROUND THE DRUM UNIT................................................................... 6-14

6.3.1 OPC DRUM REMOVAL................................................................. 6-14

6.3.2 CHARGE CORONA UNIT REMOVAL...........................................6-15

6.3.3 ERASE LAMP REMOVAL ............................................................. 6-16

6.4 PAPER FEED.........................................................................................6-18

6.4.1 PAPER FEED CLUTCH REMOVAL.............................................. 6-18

6.4.2 PAPER FEED ROLLER REMOVAL.............................................. 6-19

6.4.3 REGISTRATION SOLENOID REMOVAL...................................... 6-20

6.5 FUSING.................................................................................................. 6-21

6.5.1 FUSING UPPER UNIT REMOVAL................................................ 6-21

6.5.2 PRESSURE ROLLER REMOVAL................................................. 6-22

6.5.3 FUSING LAMP REMOVAL............................................................ 6-23

6.5.4 HOT ROLLER STRIPPER PAWL REMOVAL................................ 6-24

6.5.5 HOT ROLLER REMOVAL ............................................................. 6-25

6.5.6 FUSING THERMISTOR REMOVAL.............................................. 6-26

6.5.7 FUSING THERMOFUSE REMOVAL ............................................. 6-27

6.5.8 FUSING PRESSURE ADJUSTMENT............................................ 6-28

6.6 OTHERS................................................................................................. 6-29

6.6.1 TRANSFER CORONA UNIT REMOVAL.......................................6-29

6.6.2 MAIN MOTOR REMOVAL............................................................. 6-30

6.6.3 OZONE FILTER REMOVAL.......................................................... 6-31

6.6.4 TONER END SENSOR REMOVAL............................................... 6-32

6.6.5 POWER PACK REMOVAL............................................................ 6-33

6.6.6 POWER PACK OUTPUT ADJUSTMENT ...................................... 6-36

6.6.7 TRANSFER CORONA CURRENT ADJUSTMENT ....................... 6-37

6.6.8 GRID VOLTAGE ADJUSTMENT................................................... 6-38

6.6.9 BIAS VOLTAGE ADJUSTMENT.................................................... 6-39

6.7 COPY QUALITY ADJUSTMENT............................................................ 6-40

6.7.1 IMAGE DENSITY ADJUSTMENT.................................................. 6-40

6.7.2 REGISTRATION ADJUSTMENT................................................... 6-44

6.7.3 LEAD EDGE ERASE MARGIN ADJUSTMENT............................. 6-44

6.7.4 VERTICAL MAGNIFICATION ADJUSTMENT...............................6-45

6.7.5 HORIZONTAL MAGNIFICATION ADJUSTMENT (A227 ONLY)... 6-45

6.7.6 FOCUS ADJUSTMENT (A227 ONLY)........................................... 6-46

6.7.7 PARALLELOGRAM IMAGE ADJUSTMENT.................................. 6-47

6.8 CONNECTOR LAYOUT......................................................................... 6-48

6.8.1 MAIN CONTROL BOARD (MCB) .................................................. 6-48

6.8.2 POWER SUPPLY UNIT (PSU)...................................................... 6-49

6.8.3 NOISE FILTER.............................................................................. 6-49

6.8.4 POWER PACK............................................................................... 6-50

iii

28 February 1998 SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

Configuration: Desk top
Copy Process: Dry electrostatic transfer system
Originals: Sheet/Book
Original Size: Maximum: A4/8½" x 14"
Copy Paper Size Paper tray feed:

A5, B5, A4, 5½" x 8½", 8½" x 11", 8½" x 13",
8½" x 14"

By-pass feed:

Maximum: A4/8½" x 14"
Minimum: A6/8½" x 5½"

Copy Paper Weight: Paper tray feed: 60 to 90 g/m2, 16 to 24 lb

By-pass feed: 60 to 180 g/m2, 16 to 48 lb

Reproduction Ratios:

Enlargement

Full Size 100% 100%

Reduction

Metric Version Inch Version

141%
122%

82%
71%

141%

93%
78%
70%

Overall

Information

Zoom (A227 model only): From 70% to 141% in 1% steps
Copy Speed: 8 copies/minute (A4/8½" x 11")
Warm-up Time:

Less than 15 seconds (at 23°C/73°F)
First Copy Time: Less than 10 seconds (A4/8½" x 11")
Copy Number Input: Up/Down key, 1 to 50
Manual Image Density

4 steps including halftone
Selection:

Automatic Reset: 1 minute standard setting; can also be set to 3

minutes or no auto reset
Paper capacity: Paper Tray: 250 sheets (80 g/m2/20 lb)

By-pass feed entrance: 1 sheet (180 g/m2/48 lb)
Toner Replenishment: CTDM exchange (140g/CTDM)
Copy Tray Capacity: 50 sheets

1-1

SPECIFICATIONS 28 February 1998

Power Source: 120 V, 60 Hz, more than 10 A (for North America)

220 ~ 240 V, 50/60 Hz, more than 6 A

(for Europe/Asia )

220 V, 50/60 Hz, more than 6 A (for Asia)
Power Consumption:

Maximum 1,200 W/1,300W

Copy cycle 400 W/450W

Warm-up 750 W/790W

Stand-by 55 W/91W

Auto Shut-off 5W/5W

(120 V machines/230 V machines)

Dimensions: Width: 485 mm, 19.1"

Depth: 385 mm, 15.2"

Height: 260 mm, 10.2"
Noise Emissions:

Sound pressure level at
the operator position

Sound power level in
stand-by condition

Sound power level
during copy cycle

The measurements were made according to ISO 7779

Weight: Less than 16.5 kg, 36.4 lb

Less than 55 dB
Less than 40 dB
Less than 62 dB

Energy Star Enabled by SP77—default is ON)

Sleep time selected by SP14—default is 30 min utes

(Note: When in sleep mode, only the Start indicator is

on (blinking green). To restore operation, press any

key other than the Start key.)

1-2

28 February 1998 COPY PROCESSES AROUND THE DRUM

1.2 COPY PROCESSES AROUND THE DRUM

2

3

7

4

6

5

A227V500.WMF

Overall

Information

1. Drum Charge

In the dark, the charge corona unit gives a uniform negative charge to the organic
photoconductor (OPC) drum. The charge remains on the surface of the drum
because the OPC drum has a high electrical resistance in the dark.

2. Exposure

An image of the original is reflected to the drum surface via the optics assembly.
The charge on the drum surface is dissipated in direct proportion to the intensity on
the reflected light, thus producing an electrical latent image on the drum surface.

3. Erase

The erase lamp illuminates the area of the charged drum surface that will no t be
used for the copy image. The resistance of the drum in the illuminated areas drops
and the charge on those areas dissipates.

4. Development

Positively charged toner is attracted to the negatively charged areas of the drum,
thus developing the latent image. (The positive triboelectric charge is caused by
friction between the carrier and toner particles.)

5. Image Transfer

Paper is fed to the drum surface at the proper time so as to align the copy paper
and the developed image on the drum surface. Then, a strong negative charge is
applied to the back side of the copy paper, producing an electrical force which pulls

1-3

COPY PROCESSES AROUND THE DRUM 28 February 1998

the toner particles from the drum surface to the copy paper. At the same time, the
copy paper is electrically attracted to the drum surface.

6. Cleaning

The cleaning blade scrapes any toner that was not transferred off of the drum.

7. Quenching

Light from the quenching lamp electrically neutralizes the drum surface.

1-4

28 February 1998 MECHANICAL COMPONENT LAYOUT

1.3 MECHANICAL COMPONENT LAYOUT

1. 2

21

nd

mirror

22

23

20

2

1

3 4 5 6

7

8 9

10

Overall

Information

11

12

13

A227V501.WMF

19

18

17

9. Development roller

141516

17. Drum•

2. 1st mirror

3. Exposure lamp

4. Quenching lamp

5. Charge corona unit

6. Lens

7. 6th mirror

8. Erase lamp

10. 4th mirror

11. 5th mirror

12. By-pass feed table

13. Relay rollers

14. Paper feed rollers

15. Registration rollers

16. Transfer corona unit

18. Cleaning blade

19. Pressure roller

20. Exit rollers

21. Copy tray

22. Hot roller

23. 3rd mirror

1-5

ELECTRICAL COMPONENT LAYOUT 28 February 1998

1.4 ELECTRICAL COMPONENT LAYOUT

17

16

2

3

1

4

5

6

7

8

9

10

11

15

14

13

A227V502.WMF

12

18

27

19

26

20

21

22

23

24

A227V503.WMF

25

1-6

28 February 1998 ELECTRICAL COMPONENT DESCRIPTIONS

1.5 ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout and the point-to-point diagram on the
waterproof foldout sheet for symbols and index numbers.

Symbol Name Function Index No.

Motors

M1 Main Motor

M2 Exhaust Fan Motor Removes heat from around the fusing

M3 Scanner Drive Motor Drives the scanners (1st and 2nd). 6
M4 Lens and Mirror Motor

(A227 machines only)

Clutches

CL1 Paper Feed clutch

Switches

SW1 Interlock Switch Cuts all power when the upper unit is

SW2 VL Switch Changes the light intensity of exposure

Sensors

S1 ADS Sensor Detects the background density of the

S2 Registration Sensor Detects paper end condition. Checks if

S3 Lens and Mirror H. P.

Sensor (A227
machines only)

S4 Scanner H. P. Sensor

S5 Toner End Sensor Detects toner end condition. 12
S6 Exit Sensor Detects misfeeds. 20

Solenoid

SOL1 Registration Solenoid Releases the stopper, synchronizing

Printed Circuit Boards

PCB1 Main Control Board Controls all copier functions. 8
PCB2 Power Pack Provides high voltage for the charge

PCB3 Power Suppl y Board Generates 5 Vdc and 24 Vdc outputs

Drives all the main unit components
except for the optics unit and fans.

unit and blows the ozone built up
around the charge corona unit to the
ozone filter. Prevents build-up of hot
air in the optics cavity.

Moves the lens and 4th/5th mirror
positions in accordance with the
selected magnification.

Transfers main motor drive to the
paper feed roller.

opened.

lamp.

original.

paper is set on the by-pass feed table.
Informs the CPU when the lens and

th/5th

4

mirror assembly are at the home

position (full size position).
Informs the CPU when the 1

is at the home position.

the paper-feed timing with the original
scan.

corona, transfer corona, and
development bias.

from 120 Vac or 230 Vac inputs.
Drives the exposure lamp, fusing lamp,
and main motor.

st

scanner

22

5

9

23

24

14

13

11

7

4

25

10

18

Overall

Information

1-7

ELECTRICAL COMPONENT DESCRIPTIONS 28 February 1998

PCB4 Operation Pan el Bo ar d

PCB5 Noise Filter Removes electrical noise from the

Lamps

L1 Ex posur e Lamp

L2 Fusing Lamp Provides heat to the hot roller. 27
L3 Quenching Lamp (QL) Neutralizes any charge remaining on

L4 Erase Lamp

Others

TH1 Optics Thermistor Monitors the temperature around the

TH2 Fusing Thermistor Monitors the fusing temperature. 26

TF1

TF2 Fusing Thermofuse Provides back up overheat protection

CO Total Counter Keeps a count of the total copies

Exposure Lamp
Thermofuse

Informs the CPU of the selected
modes and displays the machine
condition on the panel.

input power.

Applies high intensity light to the
original for exposure.

the drum surface after cleaning.
Discharges the drum outside of the

image area. (Provides leading/trailing
edge and side erase.)

exposure lamp for overheat protection.

Provides back up overheat protection
around the exposure lamp.

in the fusing unit.

made. (option)

17

21

1

16

15

3

2

19

—

1-8

3 April 1998 DRUM

2. DETAILED DESCRIPTION

2.1 DRUM

2.1.1 OPC DRUM CHARACTERISTICS

The OPC (Organic Photoconductor) Drum used in this machine is small in diameter
(30 mm), ensuring good paper separation. An OPC drum has the characteristics of:

1. Being able to accept a high negative electrical charge in the dark. (The

electrical resistance of a photoconductor is high in the absence of light.)

2. Dissipating the electrical charge when exposed to light. (Exposure to light

greatly increases the conductivity of a photoconductor.)

3. Dissipating an amount of charge in direct proportion to the intensity of the light.

That is, where stronger light is directed to the photoconductor surface, a
smaller voltage remains on the drum.

4. Being less sensitive to changes in temperature (when compared to selenium F

type drums).

5. During the drum’s life, drum residual voltage gradually increases and the

photoconductive surface becomes worn. Therefore, some compensation for
these characteristics is required.

Detailed

Descriptions

2-1

CHARGE 3 April 1998

2.2 CHARGE

2.2.1 OVERVIEW

[A]

This machine uses a single wire scorotron to
charge the drum. The corona wire [A]
generates a corona of negative ions when the
power pack applies a negative voltage
(approximately -4.7 kV). The stainless steel
grid plate [B] ensures that the drum coating
receives a uniform negative charge (-880 V
applied by the power pack) as it rotates past
the corona.

[B]

The charge corona unit contains a wire cleaner for user maintenance.

A227D500.WMF

The exhaust fan [C] causes a flow of air
through the charge corona section. This
prevents an uneven build-up of negative
ions that can cause uneven image
density. The exhaust fan also cools the
optics cavity.

An ozone filter [D], which adsorbs ozone
(O3) generated by the charge corona, is
located behind the exhaust fan. The
ozone filter decreases in efficiency over
time as it adsorbs ozone. The expected
life of the ozone filter is 30k copies.

[C]

[D]

A227D501.WMF

2-2

3 April 1998 OPTICS

2.3 OPTICS

2.3.1 OVERVIEW

A227D502.WMF

During the copy cycle, an image of the original on the exposure glass is reflected
onto the drum surface through the optics assembly.

Detailed

Descriptions

This machine has five (metric version) or four (inch version) standard reproduction
ratios (A227 machine only), and reproduction ratios in one-percent steps from 70%
to 141% by zoom function. A stepper motor is used to change the positions of the
lens and the 4th/5th mirrors to enlarge/reduce the image perpendicular to the
scanning direction. Changes in reproduction ratio in the scanning direction are
achieved by changing the scanner speed (A227 machine only).

The CPU monitors the temperature around the optics through a thermistor that is
located on the scanner frame. When the temperature reaches 43°C, the machine
stops copying and displays “U1” on the operation panel. Then the machine moves
the scanner to the return position, turns off the fusing lamp, and starts rotating the
exhaust fan faster to cool the optics cavity. After the temperature drops below
40°C, the machine returns the scanner to the home position, turns on the fusing
lamp, and rotates the fan at the normal speed.

Additionally, a thermofuse on the fir st scanner provides back up overheat
protection. It opens if the temperature reaches 128°C and cuts ac power to the
exposure lamp.

2-3

OPTICS 3 April 1998

2.3.2 SCANNER DRIVE

[G]

[E]

[A]

[F]

[C]

[D]

[B]

A227D503.WMF

A stepper motor [A] is used to drive the scanner.
The first scanner [B] consists of the exposure lamp and the first mirror. The second

scanner [C] consists of the second and third mirrors. The scanner drive motor
drives the first and second scanners using a scanner drive wire [D] via a pulley [E].
Both of the scanners move along the guide rod [F]. The second scanner speed is a
half of the first scanner speed.

The home position sensor [G] detects when the scanner is at the home position.
The scanner return position is determined by counting the scanner motor drive
pulses.

2-4

3 April 1998 OPTICS

2.3.3 LENS AND 4TH/5TH MIRROR DRIVE (A227 MACHINE ONLY)

[B]

[D]

[A]

[C]

[E]

[F]

A227D504.WMF

Drive from the lens motor [A] is transmitted to the timing belt [B] on which the lens
unit [C] is clamped. The lens position is changed to provide the proper optical
distance between the lens and the drum surface corresponding to the selected
reproduction ratio. The home position sensor [D] detects when the lens is at its
home position. The main control boards keeps track of the lens position based on
the number of pulses sent to the lens motor.

Detailed

Descriptions

Drive from the lens motor is also transmitted to the 4th/5th-mirror drive cam [E]. As
the lens unit position is changed, the cam rotates to change the 4th/5th-mirror [F]
position to provide proper the focal distance between the lens and the drum
surface.

2-5

OPTICS 3 April 1998

2.3.4 AUTOMATIC IMAGE DENSITY CONTROL SYSTEM (ADS)

[A]

A227D505.WMF

A227D506.WMF

In ADS mode, the original background density is sensed by the ADS sensor [A]
and the CPU determines an appropriate development bias voltage for the original
to prevent dirty background from appearing on copies.

The sensor, a photodiode, is mounted on the upper front frame. The sensor cover
has a hole to allow the light reflected from the original to fall directly onto the
sensor.

Sampling starts 6 millimeters “a” from the leading edge of the original and
continues for 15.0 millimeters “b” f rom the leading edge of original in full size mode.
These lengths “a” and “b” will vary depending on the selected reproduction ratio.

The photosensor circuit converts the light intensity to a voltage. The detected
voltage is amplified and sent to the main control board. The output from the sensor
is adjusted to 2.5 volts for a normal white original. The sensor outputs a lower
voltage as less light is reflected from the original (the background is darker). The
CPU compares the maximum detected voltage with the ADS reference voltage (2.5
± 0.2 volts) and compensates the copy image density by changing the
development bias voltage.

2-6

3 April 1998 OPTICS

2.3.5 EXPOSURE LAMP VOLTAGE CONTROL

The main board controls the exposure lamp voltage through the power supply
board. The copy image density is controlled by the lamp intensity and
development bias.
This section explains how the exposure lamp voltage control affects the copy
image density.

Base Lamp Voltage Setting

The base lamp voltage is determined by the SP48 setting.

Base Lamp Voltage =

SP48 value x 0.5 (120 V machines)

SP48 value x 1.0 (230 V machines)

The default settings (may not equal to factory settings) of SP48 are:

for 120 V machines (= 64 V)

128

for 230 V machines (= 120 V)

120

Increasing the value makes the copy image lighter.
The maximum value of the lamp voltage setting including compensation factors

(see following) is 180 for 230-volt models and 194 for 120-volt models. For 120-volt
machines, the actual lamp voltage is one-half the lamp voltage setting; therefore,
the maximum lamp voltage is 97 volts. For 230-volt machines the actual lamp
voltage is the same as the lamp voltage setting; so, the maximum voltage is 180
volts.

Detailed

Descriptions

Compensation Factors

The base lamp voltage is shifted by several factors as discussed in the following
sections.

NOTE:

In the following tables, the default settings are in bold type.

1. Reproduction Ratio Correction

The exposure lamp voltage increases or decreases depending on the
magnification ratio. This compensates for the change in concentration of light on
the drum.

Magnification Ratio Exposure Lamp

70% to 99% -1 step

100% 0

101% to 141% +1 step

2-7

OPTICS 3 April 1998

2. Image Density Adjustment Setting (SP34)

SP34 can adjust the copy image density to adapt the machine to its operating
environment.
Depending on the SP34 setting, both the exposure lamp voltage and the
development bias may change.

SP34 (This can also be changed by UP1.)

SP34 Setting Setting Exposure Lamp

Voltage Change

0Normal 0 0

1 Light 0 -40 V
2Dark 0 +40 V
3 Lighter +3 steps -40 V
4 Darker -3 steps +40 V
5 Lightest +7 steps -40 V
6 Darkest -7 steps +40 V

Development

Bias Change

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

3. Image Density Setting Position

The operation panel has four image density level positions. Depending on the
position, the exposure lamp base voltage is changed. (ADS is the default.)

Photo Mode Darker ADS Lighter

0 - 6 steps 0 + 6 steps

In the photo mode, the exposure lamp voltage is unchanged; however, the
development voltage is changed to improve the copy image for halftone originals.
(Refer to Development section.)

(Image Density Adjustment At Darker Setting Position)

There are two SP modes which can adjust the image density when the “Darker”
position is selected on the operation panel.
Both SP modes change the exposure lamp voltage as shown below.

SP35: Coarse Adjustment (This can also be changed by the UP2)

SP35 Setting Setting Exposure Lamp Voltage

0 Normal -6 steps

1 Darker -8 steps
2 Darkest -10 steps

2-8

3 April 1998 OPTICS

SP38: Fine Adjustment

Setting SP38 Setting Lamp Voltage Change

Darkest 0 -3 steps

1 -2 steps
2 -1 step

30

4+1 step
5+2 steps

Lightest 6 +3 steps

(Image Density Adjustment at Lighter Setting Position)

There are two SP modes which can adjust the image density when the “Lighter”
position is selected on the operation panel.
Only the SP mode (SP39) for the fine adjustment of the image density changes the
exposure lamp voltage. The coarse adjustment (SP36) changes the development
bias (see Development section).

Detailed

Descriptions

SP39: Fine Adjustment

Setting SP39 Setting Lamp Voltage Change

Darkest 0 -3 steps

1 -2 steps
2 -1 step

30

4+1 step
5+2 steps

Lightest 6 +3 steps

(Image Density Adjustment At Photo Mode Position)

The image density in the Photo mode can be changed by the SP64.
The exposure lamp voltage and the base development bias are changed by SP64

as shown in the table.
SP64 (This can also be changed by UP4.)

Settings No. Base Bias Voltage

Lightest 0 -270 V +4 steps

1 -270 V +2 steps
2 -270V 0

3 -230 V 0

4 -210 V 0

Darkest 5 -190 V 0

Exposure Lamp

Change

2-9

OPTICS 3 April 1998

4. VL Correction

The light intensity may decrease because of dust accumulated on the optics parts.
Additionally, the drum sensitivity gradually decreases during the drum’s life. This
may cause dirty background on copies. This is automatically compensated for by
the VL correction.

The exposure lamp voltage is increased by +1.0 volts (230-V machines), or +0.5
volts (120-V machines) at the set copy count interval. The VL correction counter
tracks the copy count interval. Note that if the VL counter is cleared, an improper
correction will be applied. The table below shows the relationship between the SP
setting and the interval.

SP63 Setting Exposure Lamp Voltage Special UP31

0 +1 step/4000 copies 0

1 +1 step/3000 copies 1
2 +1 step/2500 copies 2
3 +1 step/2000 copies 3
4 +1 step/1500 copies 4
5 +1 step/1000 copies 5
6 +1 step/500 copies ­7 +1 step/250 copies ­8 No Correction -

(Special UP Modes)

There are thirteen user program modes on this model (refer to the operator’s
manual and UP mode and SP mode cross-reference table). The operator’s manual,
however, explains only eight modes of them.
The UP modes numbered from 30 to 34 are special UP modes. If it is necessary to
change any settings related to the special UP modes, the service representative
may ask the user to change it and thus avoid a visit.

Please note that UP31 accepts settings only from 0 to 5.

2-10

3 April 1998 OPTICS

(VL Switch)

Depending on the environment, the default automatic VL correction may not be
enough to correct the image density. The VL switch is located on the upper
registration roller assembly in the machine and allows the operator to correct image
density manually.

The exposure lamp voltage is increased according to the VL switch position.

A227d524.tif

Detailed

Descriptions

Position 0 Position 1 Position 2

0

+10 steps +20 steps

The amount of increase in each position can be changed by SP62 as shown
below:

SP62 Setting Special UP Mode Exposure Lamp Voltage

UP32 SW Position 0 SW Position 1 SW Position 2

0 0 0 +10 steps +20 steps

1 1 0 +5 steps +10 steps
2 2 0 +15 steps +30 steps
3 3 0 +20 steps +40 steps

2-11

ERASE 3 April 1998

g

g

2.4 ERASE

2.4.1 OVERVIEW

[A]

A227D508.WMF

abcdef

The erase lamp [A], which is installed in the upper unit, consists of a single row of
LEDs extended across the full width of the drum. The erase lamp has the following
functions:

•

Leading edge erase

•

Side erase (A227 machines only)

•

Trail edge erase

h

A227D509.WMF

abcdef

2-12

3 April 1998 ERASE

2.4.2 LEAD EDGE ERASE

The entire line of LEDs turns on when the main motor turns on. They stay on until
the erase margin slightly overlaps the lead edge of the original image area on the
drum (Lead Edge Erase Margin). This prevents the shadow of the original edge
from being developed on the copy. At this point, side erase starts (A227 machines
only). The width of the leading erase margin can be adjusted using SP41.

2.4.3 SIDE ERASE (A227 MACHINES ONLY)

Based on the reproduction ratio, the LEDs turn on blocks (labeled “a” to “h” on the
previous page). This reduces toner consumption and drum cleaning load.

The CPU determines which blocks to turn on based on the selected reproduction
ratio as follows.

Reproduction Ratio (%) Blocks ON

70 to 72 a - g
73 to 76 a - f
77 to 80 a - e
81 to 85 a - d
86 to 88 a - c
89 to 92 a - b
93 to 97 a

98 to 100 All Off

2.4.4 TRAILING EDGE ERASE

This minimizes toner consumption.

Detailed

Descriptions

The entire line of LEDs turns on after the trailing edge of the latent image has
passed 10 mm from the erase lamp. The length of the latent image is determined
by the paper length, which is checked by the registration sensor. The LEDs stay on
to erase the leading edge of the latent image in the next copy cycle. After the final
copy, the erase lamps and the main motor turn off at the same time.

2-13

DEVELOPMENT 3 April 1998

2.5 DEVELOPMENT

[C]

2.5.1 OVERVIEW

[D]

[B]

[A]

The development unit is contained in the CTDM (Cleaning Toner Development
Magazine).

When the main motor turns on, th e development roller [A] and agitator [ B] start
turning.

There are permanent magnets in the development roller which attract the
developer to the roller. The turning sleeve of the development roller carries the
developer past the doctor blade, which trims the developer to the desired
thickness.

The development roller sleeve continues to turn, carrying the developer to the drum
[C]. When the developer brush contacts the drum surface, the negatively charged
areas of the drum surface attract and hold the positively charged toner. In this way,
the latent image is developed. The amount of toner consumed during development
is supplied from the toner bottle automatically.

The development roller is given a suitable negative bias to prevent toner from
being attracted to the non-image areas, which may have a residual negative
charge. The bias also controls image density.

A227D510.WMF

The toner end sensor [D] detects when toner in the CTDM has run out.

2-14

3 April 1998 DEVELOPMENT

2.5.2 TONER SUPPLY MECHANISM

[C]

[A]

[D]

[B]

A227D511.WMF

Before the two seals [A, B] and are removed from a new CTDM, the developer is
divided into six cells to prevent developer in it from biasing during shipment. Toner
and developer mix when the seals are removed. Whenever a new CTDM is
installed into the machine, CTDM initialization must be performed to mix the toner
and developer evenly, and create the triboel ectric charge.
CTDM initialization is performed at the following times:

•

when the main switch is turned off and on at the toner end condition

•

when the upper cover is opened and closed at the toner end condition

•

SP12 is performed

Detailed

Descriptions

NOTE:

CTDM initialization must be performed by using SP12 if the CTDM is
replaced when the toner end condition does not exist.

The developer case is full of developer and toner after CTDM initialization. Toner
density in the developer case [C] is kept uniform all the time since the amount of
consumed toner is supplied from the toner case [D] automatically.

2-15

DEVELOPMENT 3 April 1998

2.5.3 DEVELOMENT BIAS FOR IMAGE DENSITY CONTROL

Image density is controlled by changing two items—the amount of bias voltage
applied to the development roller sleeve, and the amount of voltage applied to the
exposure lamp.

Applying a bias voltage to the development sleeve reduces the potential between
the development roller and the drum, thereby reducing the amount of toner
transferred. As the bias voltage becomes greater, the copy becomes lighter.

The method of control depends on whether the image density is manually selected
or auto image density is used.

Base Bias Voltage in Each Image Density Mode

The base bias voltage for non-image areas (between copies) is fixed at -150 Volts.
This value is also be compensated by the factors explained later.

The base bias voltage for image areas is determined according to the setting of the
image density mode. The following table shows the base development bias. The
exposure lamp base voltage correction value is included as a reference.

Photo Mode Darker ADS Lighter

Base Bias -230 V -150 V -150 V -190 V

Exposure Lamp Voltage 0 -6 steps 0 +6 steps

Compensation Factors

1. Automatic Image Density (ADS) Mode

In ADS mode, the exposure lamp base voltage is fixed at a value that is
determined by SP48 (see Optics section). Image density is controlled by changing
only the development bias voltage.

The bias voltage for ADS mode depends on the background image density of the
original as measured by the ADS sensor.

The CPU checks the voltage output from the automatic ID circuit. This circuit has a
peak hold function. The peak hold voltage corresponds to the maximum reflectivity
of the original. The CPU then determines the proper development bias level with
reference to the peak hold voltage.

2-16

3 April 1998 DEVELOPMENT

The table below shows the ratio of the ADS voltage (actual original background
density) to the ADS reference voltage (standard white background density) and the
development bias voltage.

ADS Voltage Ratio (%) Development Bias Voltage

80 to 100 (light) -150 V

73 to 79 -190 V
60 to 72 -230 V
30 to 59 -270 V

0 to 29 (dark) -290 V

2. Image Density Adjustment Setting (SP34)

Based on SP34, compensation will be applied to the development base bias
voltage as shown in the following table. This compensation is applied to all the
image density adjustment positions.

SP34 (This can also be changed by UP1)

SP34 Setting Setting Development

Bias Change

0Normal +0 V 0

1 Light -40 V 0
2 Dark +40 V 0
3 Lighter -40 V +3 steps
4 Darker +40 V -3 steps
5 Lightest -40 V +7 steps
6 Darkest +40 V -7 steps

NOTE:

The value in the list will be added to the base bias voltage.

Exposure Lamp
Voltage Change

Example)
Operation panel set to “Darker”
Base bias voltage = -150 Volts
SP34 Setting = 3
Development bias = -150 + (-40) = -190 Volts

Detailed

Descriptions

3. Image Density Adjustment at Lighter Setting Position (SP36)

SP36 can change the base bias voltage when the “Lighter” position is selected on
the operation panel.

SP36 (This can also be changed by UP3)

SP36 Setting Image Density Base Bias Voltage at Lighter Position

0 Normal -190 V

1 Lighter -230 V
2 Lightes t -270 V

2-17

DEVELOPMENT 3 April 1998

4. Photo Mode Correction (SP64)

The image density in the Photo mode can be changed by the SP64 as shown in
the following table.

SP64 (This can also be changed by UP4)

No. Setting Base Bias Voltage Exposure Lamp

0 Lightest -270 V +4 steps
1 Lighter - 270 V +2 steps
2 Light -270V 0

3 Normal -230 V

4 Dark -210 V 0
5 Dark er -190 V 0

0

2.5.4 TONER END CONDITION

Toner end condition is determined by the toner end sensor, which is located below
the toner bottle of the CTDM.

Toner Near-end Condition

While the main motor is rotating, the machine monitors the voltage output from the
toner end sensor. The voltage from the sensor is high when the toner bottle of the
CTDM is full and becomes low when the toner bottle is almost empty.

If the CPU detects a low output from the toner end sensor more than 3 times in a
row, the CPU starts to blink the Replace CTDM indicator (). This is the toner
near-end condition. After it detects this condition, the machine can make 50 copies.

The machine clears the toner near-end condition if the output from the toner end
sensor goes back high for 5 seconds.

Toner End Condition

If the machine makes more 50 sheets of copies during toner near-end condition or
the CPU detects a low output for more than 5 seconds, it disables copying and
lights the Replace CTDM indicator ().

The machine clears the toner end condition if the output from the toner end sensor
goes back high for 5 seconds.

2-18

3 April 1998 DEVELOPMENT

Toner End Recovery

Replacing the CTDM clears the toner end condition. If the main switch is turned off
and back on, or the upper cover is opened and closed during the toner near-end
condition or toner end condition, the machine expects that the CTDM has been
replaced. It then rotates the main motor for CTDM Initialization, and then the CPU
monitors an output from the sensor. The machine clears the toner end condition if
the CPU detects a high output from the toner end sensor for more than 5 seconds.

NOTE:

1) The machine also detects the toner end condition when the CTDM is not
installed in it.

2) CTDM initialization can be executed using SP12.

Detailed

Descriptions

2-19

IMAGE TRANSFER 3 April 1998

2.6 IMAGE TRANSFER

A227D512.WMF

[A]

A high negative voltage (approximately -5.5 kV) is applied to the transfer corona
wire [A] by the power pack, and the corona wire generates negative ions. These
negative ions are applied to the back side of the copy paper. This negative charge
forces the paper against the drum and attracts the positively charged toner onto
the paper.

The paper separates from the drum automatically because of the drum’s small
diameter. Due to the paper’s stiffness, it cannot make the sharp turn and separates
without any assistance. This is sometimes referred to as

curvature separation

.

2-20

3 April 1998 DRUM CLEANING

2.7 DRUM CLEANING

[A]

A227D512.WMF

Detailed

Descriptions

The cleaning unit and the used toner tank are contained in the CTDM.
A counter blade system is used for drum cleaning. The cleaning blade [A] scrapes

off any toner remaining on the drum after the image is transferred to the paper.
There is no used toner overflow detection mechanism because the used toner tank

is large enough for the lifetime of the CTDM.

2-21

QUENCHING 3 April 1998

2.8 QUENCHING

[A]

A227D508.WMF

In preparation for the next copy cycle, light from the quenching lamp (LEDs) [A]
neutralizes any charge remaining on the drum. The quenching lamp is installed on
the charge corona unit.

2-22

3 April 1998 PAPER FEED AND REGISTRATION

2.9 PAPER FEED AND REGISTRATION

2.9.1 OVERVIEW

[D]

[C]

[A]

[E]

A227D514.WMF

Detailed

Descriptions

[B]

This machine has one paper fee d stati on an d a by-pass fee d t able.
The paper feed station uses a paper tray [A] which can hold 250 sheets. The by-

pass feed table [B] can hold 1 sheet.
The paper tray uses two semicircular feed rollers [C] and a corner separator. The

semicircular feed rollers make one rotation to drive the top sheet of the paper stack
to the relay rollers [D].

The paper tray has two corner separators, which allow only one sheet to feed.
They also serve to hold the paper stack.

If a sheet of paper is set on the by-pass feed table, the registration sensor [E] is
actuated and the machine goes to by-pass feed mode.

2-23

PAPER FEED AND REGISTRATION 3 April 1998

2.9.2 PAPER FEED MECHANISM

[C]

[D]

A227D515.WMF

[E]

[A]

[F]

[B]

A227D516.WMF

The main motor rotation is transmitted to the paper feed clutch gear [A] though
several gears. The rotation of the paper feed clutch gear is transmitted to the relay
roller gear [B] through an idle gear.

After the Start key is pressed, the solenoid [C] of the paper feed clutch is energized
to release the stopper [D], and the rotation of the relay roller gear is transmitted to
the feed roller shaft [E]. The solenoid stays on for 250 milliseconds and then turns
off. The feed rollers stop when they complete one rotation.

Before the feed rollers stop, the relay rollers [F] catch the leading edge of the paper
and continue feeding it.

2-24

3 April 1998 PAPER FEED AND REGISTRATION

2.9.3 REGISTRATION MECHA N ISM

[A]

[B]

Detailed

Descriptions

[C]

A227D517.WMF

The relay rollers always rotate while the main motor rotates. They transport the
paper to the registration rollers [A]. The registration rollers are also driven by the
main motor through idle gears.

There is a paper stopper [B] between the relay rollers and the registration rollers.
After the leading edge of the paper reaches the stopper, it buckles slightly to
remove skew. Then, 2.9 seconds after the paper feed clutch is turned on, the
registration solenoid [C] is energized to release the stopper, synchronizing the
paper feeding with the image on the drum. After 0.6 seconds, the registration
solenoid is de-energized.

The registration sensor detects paper length and paper end.

2-25

PAPER FEED AND REGISTRATION 3 April 1998

2.9.4 BY-PASS FEED

[C]

[D]

[B]

A227D514.WMF

If a sheet of paper is inserted in the by-pass feed table [A], the registration sensor
[B] is actuated and the machine goes to by-pass feed mode. 300 milliseconds after
the registration sensor is actuated, the main motor turn s on for 230 milliseconds to
drive the relay roller [C] to catch the leading edge of the paper. The relay roller then
transports the paper to the registration roller [D]. The registration solenoid is
energized 2358 milliseconds after the main motor starts rotating.

[A]

2-26

3 April 1998 PAPER FEED AND REGISTRATION

2.9.5 PAPER FEED AND MISFEED DETECTION TIMING



%&

 

 

 








 

The registration sensor and the exit sensor are used for misfeed detection. If the
CPU detects a misfeed, the Check Paper Path indicator () turns on or “PE” is
displayed on the copy counter.





 

 



" #$



 



!

 

A227D519.WMF

Detailed

Descriptions

When the main switch is turned on, the CPU checks these sensors for initial
misfeed.

During the copy cycle, the CPU performs four kinds of misfeed detection:
PE: Checks whether the registration sensor is actuated within 1.2 seconds after the

Start key is pressed. Since this machine has no indicator or sensor to detect
paper end, the “PE” indicator is lit in the paper end condition as well.



” (1): Checks whether the copy paper has passed through the registration sensor

6.7 seconds after the Start key is pressed.



” (2): Checks whether the exit sensor is actuated within 6.7 seconds after the

Start key is pressed.



” (3): Checks whether the copy paper has passed through the exit sensor 12.4

seconds after the Start key is pressed.

2-27

IMAGE FUSING 3 April 1998

2.10 IMAGE FUSING

2.10.1 OVERVIEW

[F]

[A]

[E]

[H]

[D]

[C]

[G]

[B]

A227D520.WMF

After the image is transferred, the copy paper enters the fusing unit. The image is
fused to the copy paper by the process of heat and pressure through the use of a
hot roller [A] and pressure roller [B].

The CPU monitors the hot roller temperature through a thermistor [C] that is in
contact with the hot roller surface. A thermofuse [D] protects the fusing unit from
overheating.

The hot roller strippers [E] separate the copy paper from the hot roller and direct it
to the exit rollers. The exit sensor [F] monitors the progress of the copy paper
through the fusing unit and acts as a misfeed detector. The exit rollers drive the
copy paper to the copy tray.

When the upper unit is closed, the pressure roller is pushed up by the arms [G].
The springs [H] at the front and rear apply the proper fusing pressure between the
hot roller and the pressure roller.

2-28

3 April 1998 IMAGE FUSING

2.10.2 FUSING LAMP CONTROL

The CPU monitors the temperature of the hot roller surface using a thermistor. The
fusing lamp is turned on and off to keep the hot roller surface at the target
temperature. The target temperature depends on the machine condition as follows.

200 C°

160 C°

Room Temp.

Fusing

ON

Lamp

OFF

Main SW is turned on

Machine Condition

After the main switch is turned on
and the fusing temperature has

reached 160

°

C.

During copying
Within 30 minutes after copying is

finished
Over 30 minutes after copying is

finished

Copy starts

Start key is pressed

Fusing Lamp

ON/OFF Threshold

°

160

C

°

C

200

°

160

C

°

150

C

Copy finishes

A227D521.WMF

Remarks

When the Start key is pressed
the red indicator lights and the
fusing temperature increases.
Paper feed starts after the fusing

temperature reaches 160

°

C.

Detailed

Descriptions

When the main switch is turned on, the CPU turns on the fusing lamp. When the
fusing thermistor detects 160°C, the machine enters the ready condition.

If the fusing temperature is higher than 160°C when the Start key is pressed, the
machine starts copying immediately. Otherwise, copying starts after the fusing
temperature reaches 160°C. The fusing temperature is controlled at 200°C during
copying.

Within 30 minutes after copying is finished, the fusing temperature is controlled at
160°C. Over 30 minutes after copying is finished, the fusing temperature is
controlled at 150°C. If auto shut off is selected, the fusing lamp is turned off when
the time selected by SP14 passes after copying is finished.

2-29

IMAGE FUSING 3 April 1998

2.10.3 FUSING LAMP CONTROL CIRCUIT

Overview

The main control board monitors the fusing temperature through a thermistor to
control the applied power. Two fusing lamp control systems are provided for this
machine.

On/Off Control

On

Off

A227D522.WMF

The voltage applied to the fusing lamp is the full duty cycle of the ac waveform. The
power is applied to the lamp until the operating temperature is reached.

Phase Control Mode

Phase

A227D523.WMF

The amount of time that power is applied to the fusing lamp depends on the
temperature of the hot roller.

NOTE:

Overheat Protection

There is an overheat protection circuit in the main control board. If the hot roller
temperature reaches 230°C, the resistance of the thermistor becomes too low. If
the main control board detects this condition for 3 seconds continuously, “E-53” is
displayed on the operation panel and power to the fusing lamp is cut.

Phase control mode is used on ly if the customer has a problem with
electrical noise or interference.

If the thermistor overheat protection circuit fails, the thermofuse opens when it
reaches 169°C, removing power from the fusing lamp.

2-30

28 February 1998 INSTALLATION REQUIREMENTS

3. INSTALLATION

3.1 INSTALLATION REQUIREMENTS

1.2.1 ENVIRONMENT

1. Temperature Range:

2. Humidity Range: 15% to 80% RH

3. Ambient Illumination: Less than 1,500 lux (Do not expose to direct

4. Ventilation: Minimum space 30 m3.

5. Ambient Dust: Less than 0.15 mg/m3 (4 x 10-3 oz/yd3)

6. If the place of installation is air-conditioned or heated, do not place the
machine:

1) Where it will be subjected to sudden temperature changes.

2) Where it will be directly exposed to cool air from an air-conditioner.

3) Where it will be dire ctly exposed to heat from a heater.

7. Do not place the machine where it will be expose d to corro sive gasses.

8. Do not install the machine at any location over 2,000 m (6,500 feet) above sea
level.

9. Place the machine on a strong and level base.

10. Do not place the machine where it may be subjected to strong vibration.

10°C to 35°C (50°F to 95°F)

sunshine.)

Room air should turn over at least 3 times per hour

Installation

1.2.2 MACHINE LEVEL

1. Front to back: Within 3 mm (0.12") of level

2. Right to left: Within 3 mm (0.12") of level

3-1

MACHINE INSTALLATION 28 February 1998

1.2.3 MINIMUM SPACE REQUIREMENTS

Place the machine near the power source, providing clearance as shown:

M o r e th a n 2 0 c m (7.9 “)

Machine

More than
11 c m (4.3 “ )

More than 30 cm (11.8“)

More than
10 c m (3.9 “)

A227V504.WMF

1.2.4 POWER REQUIREMENTS

1. Input voltage level: 120 V, 60 Hz: More than 10 A

220 ~ 240 V, 50/60 Hz: More than 6 A

2. Permissible voltage

10%

fluctuation:

Do not set anything on the power cord.
Make sure the plug is firmly inserted in the outlet.
Avoid multi-wiring.

3.2 MACHINE INSTALLATION

Refer to the procedure packed in the box with the machine or to the procedure in
the operator’s manual.

3-2

2 April 1998 SERVICE REMARKS

4. SERVICE TABLES

4.1 SERVICE REMARKS

4.1.1 GENERAL CAUTIONS

1. To prevent physical injury, keep hands away from the mechanical drive
components when the main switch is on (especially during the warm-up cycle).
If the Start key is pressed before the machine completes the warm-up cycle,
the Ready indicator alternately lights green and red; and the machine starts
making copies as soon as the warm-up cycle is completed.

2. Before disassembling or assembling any parts of the machine, make sure that
the power cord is unplugged.

3. To avoid possible injury or machine damage, always hold the upper unit firmly
with one hand while opening the upper unit or releasing the gas spring with the
other.

4. Keep all the shipping retainers for future shipping use.

5. Do not loosen any of the paint-locked screws. Such screws are used for optic
components, the drum stay, and doctor blade of the CTDM.

6. Do not release the gas spring from the pin while the upper unit is closed.
Otherwise the gas spring will expand suddenly and may cause injury.

7. To prevent the upper unit from falling when separating the gas spring from it,
hold the upper unit firmly with one hand while releasing the gas spring with the
other.

8. Do not leave the upper unit fully opened. Otherwise, the unit or whole machine
may be fall over.

4.1.2 DRUM

1. Never expose the drum to direct sunlight.

2. Never touch the drum surface with bare hands. If the drum surface is touched
with fingers or becomes dirty, wipe it with a clean, dry cloth.

3. Never use alcohol to clean the drum; alcohol dissolves the drum surface.

4. Store the drum in a cool, dry place away from heat.

Tables

Service

5. Take care not to scratch the drum as the drum’s surface layer is thin and easily
damaged.

6. Never expose the drum to corrosive gasses such as ammonia gas.

7. Always keep the drum in its protective sheet when it is out of the machine.

4-1

SERVICE REMARKS 2 April 1998

4.1.3 CTDM (CLEANING TONER DEVELOPMENT MAGAZINE)

1. Place the CTDM on a clean and level place when it is out of the machine.

2. Do not turn the CTDM upside down. Toner and developer may fall from the
unit.

3. Be careful not to damage the edge of the cleaning blade.

4. Do not store the CTDM under high temperature and high humidity conditions.

4.1.4 CHARGE CORONA UNIT

1. Do not touch the charge corona wire or grid plate with bare hands. Oil stains
may cause uneven image density on copies.

2. Clean the charge corona wire by sliding the wire-cleaning tool from front to
rear.

3. Clean the charge grid with a blower brush (not with a cloth).

4. Clean the quenching lamp (LED) with a blower brush or a dry cloth.

4.1.5 ERASE LAMP

1. Clean the erase lamp with a blower brush or dry cloth.

4-2

2 April 1998 SERVICE REMARKS

4.1.6 OPTICS

1. Clean the exposure glass with glass cleaner and a damp cloth to reduce the
amount of static electricity on the glass surface.

2. Only use a clean soft cloth to clean the mirror and reflectors.

3. Only use a blower brush to clean the lens.

4. Do not touch the following parts with bare hands:
a) Reflectors
b) Exposure Lamp
c) Mirrors and Lens

5. Whenever cleaning the optics, all the following actions must be done in order.
a) Optics cleaning
b) SP95 (VL Correction Reset)
c) Copy Quality Adjustment
d) SP56 (ADS Reference Voltage Adjustment) See the SP mode table for

details.

4.1.7 TRANSFER CORONA

1. Clean the corona wire by sliding the wire-cleaning tool from front to rear.

4.1.8 FUSING UNIT

1. Be careful not to damage the edges of th e hot roller strippe r s.

2. Be careful not to damage the tension springs of the hot roller strippers.

3. Do not touch the fusing lamp with bare hands.

4. Make sure that both fusing lamp insulators are properly set in the holders, and
that fusing lamp does not touch the inner surface of the hot roller.

4.1.9 PAPER FEED

1. Do not touch the feed roller with bare hands.

2. The side fences and the end fence of the paper tray should be positioned
correctly so that they securely hold the paper. Otherwise, paper misfeeds may
occur.

Tables

Service

3. Avoid storing paper for a long time. At high temperature and high humidity, or
at low temperature and low humidity, store paper in a plastic bag. This is
especially important to decrease the amount of curling or waving of the paper
that would lead to paper misfeeds.

4-3

SERVICE REMARKS 2 April 1998

4.1.10 OTHERS

1. When replacing the main control board, remove the EEPROM (IC105) from the
old board and replace it on the new board. Then install the new main board in
the machine.

2. Never perform SP99 (Clear All Memory) except for the following two cases:
a) When the copier m alfunctions due to a damaged EEPROM.
b) When using a brand-new EEPROM.

3. When SP99 is performed, copy qua lity may be affected. Adjust copy quality if
necessary.

4. Tighten securely the screws used for grounding the following PCBs when
reinstalling them.

•

Main Control Board

•

Power Supply Board

•

High Voltage Power Pack

4-4

2 April 1998 PROGRAM MODES

4.2 PROGRAM MODES

4.2.1 BASIC OPERATION

Component

This machine is equipped with two program modes. One is the Service Program
(SP) mode for factory and field technician usage, and the other is the User
Program (UP) mode for user usage. These program modes have a different access
procedures, but all the UP mode functions can be accessed from the SP mode.

To make it possible to reset a service call (E5x) condition such as a fusing error
using the SP mode, the SP mode can be accessed while the error condition exists.

Operation

To access these program modes, a certain key must be held down while turning on
the main switch. After accessing, select the required mode number and perform the
necessary procedures needed for that function. It is possible to move on to the
next required mode without exiting each time.

To leave the SP or UP mode, turn the main switch off and on.

Display

To display and to distinguish various conditions using the Copy Counter, the
appearance of the Copy Counter varies. When the Copy Counter is blinking, the
machine is ready to accept a program mode number, and it displays the program
mode numb er.

When the Copy Counter stops blinking, the machine is ready to accept an
adjustment value, and it may be displaying the current adjustment value.

The Photo mode indicator is always blinking when in the program modes.

Notes

1. Since the Image Density key is used during the SP modes, image density
cannot be changed using the Image Density key while in the SP modes.

2. With the exception of SP57 and SP58, all copies made inside the SP modes
are made with ADS setting without ADS compensation.

3. Since the Copy Counter is used to display the adjustment values and data, it
cannot display the number of copies.

Tables

Service

4-5

PROGRAM MODES 2 April 1998

4.2.2 SP MODE

Service Program Mode Access Procedure

1. Turn off the main switch.

2. While pressing the Increase Quantity “+” key and Clear/Stop key together, turn
on the main switch.

3. Release the Increase Quantity “+” key and the Clear/Stop key, and within 5
seconds, press the Image Density key (If not pressed within 5 seconds, the
machine will return to the copy mode). The machine is ready to accept the
program number.

How to Select the Program Number

1. By using the Increase or Decrease Quantity (“+” or “-”) keys, select the required
program number. At this point, the Copy Counter and Photo Mode indicator will
blink.

2. Press the Image Density key. The number that is currently blinking in the Copy
Counter will be entered as the selected program number.

NOTE:

To access the UP mode, turn on the main switch while pressing the
Clear/Stop key.

4-6

2 April 1998 PROGRAM MODES

Changing the Value of an SP Mode

1. Select the desired value or setting using the Increase or Decrease Quantity (“+”
or “-”) key. For some modes, since the Copy Counter has only 2 digits, the
hundred digit is shown by the combination of indicators turned on in the Manual
Image Density indicator as shown below.

= "1"

For example:

= "2"

= "3"

+

Copy Counter

= "152"

A227S500.WMF

2. When th e Image Densit y key is pressed, the number which is currently
displayed in the Copy Counter will be entered as the new value or setting, and
will be stored in memory.

3. The machine is ready to accept the new program number. Repeat to select the
program number or leave SP mode by turning the main switch off/on.

Tables

Service

4-7

PROGRAM MODES 2 April 1998

4.2.3 SP MODE QUICK REFERENCE TABLE

SP Mode

No.

3 Destination Setting 49 Fusing Temperature Adjustment
4 Forced Free Run 51 Exposure Lamp Voltage Display
5 Forced Free Run with Exposure

Lamp Off
6 Misfeed Detection Off 55 ADS Reference Voltage Display
7 Free Run 56 ADS Reference Voltage

8 Input Check 57 ADS Output Voltage Display
9 Output Check 58 Development Bias Voltage Display

10 Scanner Free Run 59 Optics Temperature Display
11 All Indicators On 60 Drum Potential Measurement

12 CTDM Initialization 61

14 Auto Shut Off (Energy Star) Time

Setting

15 Auto Reset Time Setting 63 VL Correction Interval
16 Count Up/Down Selection 64 Photo Mode Compensation

19 Disable ADS Compensation 66 OPC Counter Clear
21 A4 Lengthwise Erase Selection 69 OPC Counter Display
23 CTDM Initialization Time Setting 70 VL Correction Display
29 Fusing Temperature Control

Selection

30 Exhaust Fan Speed Setting 77 Auto Shut Off (Energy Star)

31 Development Bias Voltage Setting

During CTDM Initialization

34 Image Density Adjustment 82 Data Communication
35 Coarse Image Density Adjustment

at Darker Setting Position

36 Coarse Image Density Adjustment

at Lighter Setting Position

*38

*39

*41 Lead Edge Erase Margin

*42 Registration Adjustment 97 Service Call (E5x) Reset
*43 Vertical Magnification Adjustment 98 Total Counter Clear
*44 Horizontal Magnification Adjustm ent 99 All Memory Clear
*48 Light Intensity Adjustment

Fine Image Density Adjustment at

Darker Setting Position

Fine Image Density Adjustment at

Lighter Setting Position

Adjustment

Function

SP Mode

No.

52 Fusing Temperature Display

Adjustment

(With Paper)
Drum Potential Measurement

(Without Paper)

62 VL Switch Setting

Setting

71 Nip Band Width Measurement

Selection

81 Factory Initialization

88 Total Copy Counter Display

90 Factor y Data and Counter Clear

91 Optics Cooling Fan Operation

95 V

96 Forced Toner End Reset

Correction Counter Clear

L

Function

*For these items, values set in the factory are listed on “SP MODE FACTORY SET DATA”
sheet.

4-8

2 April 1998 PROGRAM MODES

4.2.4 UP MODE AND SP MODE CROSS REFERENCE TABLE

UP Mode No. SP MODE No. Function

1 34 Image Density Adjustment
2 35 Coarse Image Density Adjustment at Darker Setting Position
3 36 Coarse Image Density Adjustment at Lighter Setting Position
4 64 Photo Mode Compensation Setting
5 14 Auto Shut Off (Energy Star) Time Setting
6 15 Auto Reset Time Setting
7 16 Count Up/Down Selection

8 88 Total Copy Counter Display
30 69 OPC Counter Dis p lay
31 63 VL Correction Interval
32 62 VL Switch Setting
33 12 CTDM Initialization
34 77 Auto Shut Off (Energy Star) Selection

NOTE:

The UP modes numbered from 30 to 34 ar e special UP modes, which are
not explained in the operator’s manual. If it is necessary to change any
settings related to the special UP modes, the service representative may
ask the end user to change it (and thereby avoid a service visit).

Tables

Service

4-9

PROGRAM MODES 2 April 1998

4.2.5 SERVICE PROGRAM MODE

NOTE:

The default value is printed in bold letters.

SP3: Destination Setting

This mode must be set depending on the paper size being used.

No. Settings Copy Count

(SP16 Setting)

0 --- --- --­1 Inch Count up Factory setting for 120 V machines
2 Metric 1 Count up Factory setting for 230 V machines
3 Metric 2 Count up Factory setting for 100 V machines

SP3 does not have any relationship to the electrical power supply. Only erase and
magnification ratio mechanisms are changed. For example, changing this mode will
allow European machines to use inch size paper.

NOTE:

1) The error code “E15” is displayed in the copy counter if SP3 is set to “0”.

2) Lengthwise erase timing of 8½” x 11” is always performed as A4 if SP3
is set to “2” or “3”.

Note

SP4: Forced Free Run

In this mode, free run can be performed even if the fusing unit does not reach the
required temperature. See free run mode (SP7) for more details.

SP5: Forced Free Run with Exposure Lamp Off

This mode forces free run mode (SP4) with exposure lamp off.

SP6: Misfeed Detection Off

This mode allows operation without misfeed detection by the registration and exit
sensors. Press the Start key to make a copy. Copying stops upon reaching the set
count, or when the C/S key is pressed.

Use this mode to check whether the paper misfeed was caused by a sensor
malfunction. The total counter increments when copies are made in this mode.

4-10

2 April 1998 PROGRAM MODES

SP7: Free Run

In this mode, free run is performed. Press the Start key to start the free run. Press
C/S to stop the free run.

The machine operates with the normal copy process for 8½” x 14” paper and
selected reproduction ra tio with no paper feed and no total counter incr ement.

NOTE:

Before starting, close the platen cover to minimize toner consumption.

SP8: Input Check

The Manual Image Density and the Reproduction Ratio Indicators are used to
display the data from the sensors while making a normal copy.

Press the Start key to perform this mode. Press the Image Density key to stop this
mode.

Sensor Indication Display Condition

Registration Darker Image Density ON: Paper Present
Exit ADS ON: Paper Present
Scanner HP Lighter Image Density ON: Home Position
Lens HP* Reproduction Ratio 141% ON: Actuator inside Sensor

*A227 machine only

Tables

Service

SP9: Output Check

SP9 is used to turn on individual electrical components. Select the desired number
from the following table. Press the Start key to turn on the electrical component.
Press the C/S key to turn off the electrical component.

No. Electrical Components Note

Main Motor, Quenching Lamp, and

1

Exhaust Fan Motor (High Speed)

2 Charge Corona, Transfer Corona,

and Development Bias
3 Exhaust Fan Motor (High Speed)
4 --- Not used
5 Registration Solenoid
6 Paper Feed Clutch
7 Eraser Lamp All LEDs on
8 Exposure Lamp and Exhaust Fan

Motor (High Speed)

Development bias is the base voltage
without correction.

SP10: Scanner Free Run

SP10 is used to perform the scanner free run. Scanner free run starts a few
seconds after pressing the Start key. Press the C/S key to stop the free run.
Scanner free run is performed with the scanner process for 8½” x 14” paper size
and selected reproduction ratio.

4-11

PROGRAM MODES 2 April 1998

SP11: All indicators On

SP11 is used to turn on all the indicators on the operation panel for 30 seconds. To
turn off the indicators manually (before 30 seconds have passed), press the Image
Density key.

SP12: CTDM Initialization (UP33)

SP12 is used to initialize developer in a brand-new CTDM. Press the Start key to
start the CTDM initialization. The initialization time can be changed by using SP23.

NOTE:

This mode is performed automatically if the main switch is turned off and
on, or the upper unit is opened and closed during toner end condition.

SP14: Auto Shut Off (Energy Star) Time Setting (UP5)

SP14 is used to select the auto shut off time.
The main switch is shut off automatically after the selected auto shut off time if

SP77 is at “0”.

No. Settings No. Settings

0 5 min. 4 1.5 h
1 10 min. 5 2 h

2 30 min.

31 h74 h

63 h

SP15: Auto Reset Time Setting (UP6)

SP15 is used to select an auto-reset time of 1 or 3 minutes, or to cancel auto-reset.

No. Settings

01 min.

13 min.
2 None

SP16: Count Up/Down Selection (UP7)

SP16 is used to select count up or count down in the copy number display.

No. Settings

0Up

1Down

4-12

2 April 1998 PROGRAM MODES

SP19: Disable ADS Compensation

SP19 is used to disable ADS compensation while adjusting the base exposure
lamp voltage (SP48: Light intensity adjustment).

Always change the setting to 1 when adjusting the base exposure lamp voltage. Do
not forget to change it back to 0 after adjustment.

No. Settings

0ADS

1 Disable ADS compensation

SP21: A4 Lengthwise Erase Selection

SP21 is used to set the trailing edge erase timing to A4 lengthwise on a machine in
which the setting of SP3 (Destination Setting) is set to “1” (inch).

Set this to 1 for customers that make copies of A4 paper occasionally on the 120
volt machines.

No. Settings

0 8½” x 11”

1A4

Tables

Service

NOTE:

The setting of this mode is ignored if SP3 is set to “2” or “3” (metric).

SP23: CTDM Initialization Time Setting

SP23 is used to select the CTDM initialization time. Initialization is necessary to
stabilize the triboelectric charge of the toner and carrier. Since longer initialization
time gives a more even charge, set a longer time if the customer requires high
image density on the first copy with a new CTDM.

No. Settings No. Settings

0 15 s 4 35 s
1 20 s 5 40 s
2 25 s 6 50 s

3 30 s

71 min.

SP29: Fusing Temperature Control Selection

SP29 is used to select the fusing temperature control mode. It should be set to “1”
only if the cutomer has a problem with electrical noise or interference.

After selecting the control mode, you must turn the main switch off/on to change
the fusing temperature control mode.

No. Settings

0 ON/OFF control

1 Phase control

4-13

PROGRAM MODES 2 April 1998

SP30: Exhaust Fan Speed Setting

SP30 is used to select the exhaust fan speed. SP30 was provided for designers’
evaluation. There is no need to change the setting in the field.

No. Speed Duty

0 Slow 30 %

1

2
3
4
5
6
7
8 High 70 %

↓
↓
↓
↓
↓
↓
↓

35 %

40 %
45 %
50 %
55 %
60 %
65 %

SP31: Development Bias Voltage Setting during CTDM Initialization

SP31 is used to set the development bias voltage while initializing the CTDM.
This SP mode is provided for designer’s evaluation. There is no need to change

the setting in the field.

No. Settings

0 -250 V

1 -150 V
2 -200 V
3 -300 V
40

This bias is also applied at the following conditions:

•

Recovering toner end or toner near-end conditions

•

Executing SP12 (CTDM Initialization)

•

Executing SP9-1 (Main Motor Driving at Output Check)

•

Executing SP71 (Nip Band Width Measurement)

4-14

2 April 1998 PROGRAM MODES

SP34: Image Density Adjustment (UP1)

SP34 can adjust the copy image density. Both the development bias and the
exposure lamp may be changed. To make a copy in this mode after adjusting,
press the Start key.

No. Settings

0Normal 0 0

1 Light -40 V 0
2 Dark +40 V 0
3 Lighter -40 V +3 steps
4 Darker +40 V -3 steps
5 Lightest -40 V +7 steps
6 Darkest +40 V -7 steps

Development

Bias Change

Exposure Lamp

Change

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

SP35: Coarse Image Density Adjustment at Darker Setting Position (UP2)

SP35 adjusts the copy image density at the Darker setting position on the
operation panel by changing the exposure lamp voltage. To make a copy in this
mode after adjusting, press the Start key.

No. Settings Exposure Lamp Change

0 Normal -6 steps

1 Darker -8 steps
2 Darkest -10 steps

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

Tables

Service

SP36: Coarse Image Density Adjustment at Lighter Setting Position (UP3)

SP36 adjusts the copy image density at the Lighter setting position on the
operation panel by changing the development bias voltage. To make a copy in this
mode after adjusting, press the Start key.

No. Settings Development Bias Change

0 Normal -40 V

1 Lighter -80 V
2 Lightest -120 V

4-15

PROGRAM MODES 2 April 1998

SP38: Fine Image Density Adjustment at Darker Setting Position

SP38 adjusts the copy image density at the Darker setting position on the
operation panel by changing the exposure lamp voltage. To make a copy in this
mode after adjusting, press the Start key.

No. Settings Exposure Lamp Change

0 Darkest -3 steps
1 Darker -2 steps
2 Dark -1 step

3Normal 0

4Light +1 step
5 Lighter +2 steps
6 Lightest +3 steps

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

SP39: Fine Image Density Adjustment at Lighter Setting Position

SP39 adjusts the copy image density at the Lighter setting position on the
operation panel by changing the exposure lamp voltage. To make a copy in this
mode after adjusting, press the Start key.

No. Settings Exposure Lamp Change

0 Darkest -3 steps
1 Darker -2 steps
2 Dark -1 step

3Normal 0

4Light +1 step
5 Lighter +2 steps
6 Lightest +3 steps

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

SP41: Lead Edge Erase Margin Adjustment

SP41 adjusts the lead edge erase margin. The lead edge erase margin can be
adjusted by 0.5 millimeters per step (-4.0 mm to +3.5 mm). To make a copy in th is
mode after adjusting, press the Start key. See “Replacement and Adjustment —
Copy Quality adjustment” for details.

Default setting: 8

SP42: Registration Adjustment

SP42 adjusts image to paper registration. Registration can be adjusted by 0.5 mm
per step (-4.0 mm to +3.5 mm). To make a copy in this mode after adjusting, press
the Start key. See “Replacement and Adjustment — Copy Quality adjustment” for
details.

Default setting: 8

4-16

2 April 1998 PROGRAM MODES

SP43: Vertical Magnification Adjustment

SP43 adjusts magnification in the paper travel direction by changing the scanner
speed. Magnification can be adjusted by 0.2% per step (-3.2% to +3.0%). To make
a copy in this mode after adjusting, press the Start key. See “Replacement and
Adjustment — Copy Quality adjustment” for details.

Default setting: 16

SP44: Horizontal Magnification Adjustment (A227 copier only)

SP44 adjusts magnification perpendicular to the direction of paper travel by
changing the home position of the lens and mirrors. The magnification can be
adjusted by 0.2% per step (-3.2% to +3.0%). See “Replacement and Adjustment —
Copy Quality adjustment” for details.

Default setting: 16

SP48: Light Intensity Adjustment

SP48 adjusts the exposure lamp voltage. To make a copy in this mode after
adjusting, press the Start key.

No. Lamp Voltage (V)

120 V (NA) Version 230 V (EU) Version

100 50.0 100
101 50.5 101
102 51.0 102

↓↓ ↓

120

↓↓ ↓

128 64.0

↓↓ ↓

180 90.0 180

↓↓

193 96.5 --­194 97.0 ---

↓ =

sequence continues at 0.5 volt/step for 115 V machines and 1.0 volt/step for 230 V machines.

60.0

120

128

---

Do this adjustment whenever the optics are cleaned or VL correction counter is
cleared (SP95). After doing this adjustment, adjust the ADS reference voltage
using SP56. See “Replacement and Adjustment — Copy Quality adjustment” for
details.

Tables

Service

4-17

PROGRAM MODES 2 April 1998

SP49: Fusing Temperature Adjustment

SP49 adjusts the control temperature of the hot roller during coping. The fusing
temperature can be adjusted between 195°C and 205°C in 1°C steps. The fusing
temperature can be calculated from the displayed value by adding 15 (i.e. 180 =
195°C).

°

Default setting: 185 (200

C)

SP51: Exposure Lamp Voltage Display

SP51 displays the current exposure lamp voltage. For 120 V machines, the actual
applied voltage equals to half of the displayed voltage. The exposure lamp turns on
for 10 seconds when this mode is selected.

The Image Density Indicators are used to display the hundreds digit.

NOTE:

Do not repeat more than 5 times to avoid overheating the optics cavity.

SP52: Fusing Temperature Display

This mode is performed to display the fusing temperature detected by the fusing
thermistor. Press the Start key to monitor the temperature during the normal copy
cycle. The Image Density Indicators are used to display the hundreds digit.

SP55: ADS Reference Voltage Display

SP55 displays the ADS reference voltage adjusted by SP56. The number to two
decimal places is displayed in the counter. The Image Density Indicators are used
to display the unit digit as shown below.

= "1"

For example:

= "2"

= "3"

+

Copy Counter

= "2.5 3 "

4-18

A227S501.WMF

2 April 1998 PROGRAM MODES

SP56: ADS Reference Voltage Adjustment

SP56 is used to adjust the ADS reference voltage using VR100 on the main control
board. The number to two decimal places of ADS sensor output is displayed in the
counter. The Image Density Indicators ar e used to displ ay the unit digit. After 10
seconds, the output is stored as the ADS reference voltage. The voltage is
displayed as shown in the SP55 example.

The adjustment standard voltage is 2.5 ± 0.2 volts. See “Replacement and
Adjustment — Copy Quality adjustment” for details.

SP57: ADS Output Voltage Display

SP57 displays the ADS output voltage.
Press the Start key to monitor the output voltage during the normal copy cycle. The

number to two decimal places is displayed in the counter. The Manual Image
Density Indicators are used to display the unit digit. The voltage is displayed as
shown in the SP55 example.

When in SP57 mode, the machine makes cop ies in the ADS mode.

SP58: Development Bias Voltage Display

SP58 displays the development bias voltage.
Press the Start key to monitor the development bias voltage during the normal

copy cycle. The Manual Image Density Indicators are used to display the hundreds
digit.

When in SP58 mode, the machine makes cop ies in the ADS mode.

SP59: Optics Temperature Display (SP59)

SP59 displays the optics temperature detected by the optics thermistor.
Press the Start key to monitor the optics temperature during the normal copy cycle.

SP60: Drum Potential Measurement (With Paper)

Factory use only using special tools.

Tables

Service

SP61: Drum Potential Measurement (Without Paper)

Factory use only using special tools.

4-19

PROGRAM MODES 2 April 1998

SP62: VL Switch Setting (UP32)

SP62 sets the effective level for the VL switch inside of the machine.

SP62 Settings Special UP Mode Exposure Lamp Voltage Change

UP32 SW Position 0 SW Position 1 SW Position 2

0 0 0 +10 steps +20 steps

1 1 0 +5 steps +10 steps
2 2 0 +15 steps +30 steps
3 3 0 +20 steps +40 steps

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

SP63: VL Correction Interval (UP31)

SP63 sets the interval for VL correction. The exposure lamp voltage (SP48) is
increased by 1 step at the set copy count interval. Based on copy count, V
correction is performed at the intervals shown in the below table.

SP63 Settings Exposure Lamp Voltage change Special UP Mode

UP31

0 +1 step/40 00 copies 0

1 +1 step/3000 copies 1
2 +1 step/2500 copies 2
3 +1 step/2000 copies 3
4 +1 step/1500 copies 4
5 +1 step/1000 copies 5
6 +1 step/500 copies --­7 +1 step/250 copies --­8 No Correction ---

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

L

SP64: Photo Mode Compensation Setting (UP4)

SP64 sets the image density level for photo mode.
The development bias and the exposure lamp voltage are compensated according

to the setting of this mode.

No. Settings Development Bias Exposure Lamp Change

0 Lightest -270 V +4 steps
1 Lighter -270 V +2 steps
2 Light -270 V - --

3 Normal - 230 V ---

4 Dark -210 V --­5 Dark er -190 V ---

1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)

4-20

2 April 1998 PROGRAM MODES

SP66: OPC Counter Clear

Use SP66 to clear the OPC counter after replacing the new OPC drum.
Set SP66 to 1, and then press the Image Density key and Start key together.

SP69: OPC Counter Display (UP30)

SP69 shows the total number of copies made by the OPC drum installed in the
machine.

Two digits at a time of the six digits for the OPC

Image D ensity Indicator

Copy C ounter

counter are displayed on the copy counter. To
view the next two digits, press the Start key.

Lighter Image Density Indicator is lit when the
sixth and fifth digits are displayed.
Auto Image Density Indicator is lit when the
fourth and third digits are displayed.
Darker Image Density Indicator is lit when the
second and first digits are displayed.

The example to the right shows the counter
display when the copy count is 25148.

A227S502.WMF

SP70: VL Correction Display

SP70 displays the VL correction counter. This counter value is used for V
correction (SP63).

Two digits at a time of the six digits for the counter are displayed on the copy
counter. To view the next two digits, press the Start key.

L

Tables

Service

Lighter Image Density Indicator is lit when the sixth and fifth digits are displayed.
Auto Image Density Indicator is lit when the fourth and third digits are displayed.
Darker Image Density Indicator is lit when the second and first digits are displayed.

This counter is displayed as shown in the SP69 example.

4-21

PROGRAM MODES 2 April 1998

SP71: Nip Band Width Measurement

SP71 is used to measure the nip band width. Enter “0” to set the standard nip band
measurement mode.

No. Settings

0 Standard nip band measurement
1 Factory use only

Insert an OHP sheet into the by-pass feed table. After idling the fusing unit for 30
seconds, the machine lights the Start indicator green and starts to feed the sheet.
Press the Start key when it stops feeding. The machine then makes 3 nip bands at
40 millimeters intervals and feeds the sheet to the copy tray. The fusing lamp on/off
threshold is controlled at 185°C in this mode.

Position Standard Nip band Width

Front & Rear 3.0 – 3.6 mm

Front – Rear Difference 0.0 – 0.5 mm

Center More than 2.2 mm

SP77: Auto Shut Off (Energy Star) Selection (UP34)

SP77 selects the “Automatic Shut Off” mode.
The machine automatically shuts itself off at the auto shut off time selected by

SP14.

No. Settings

0 Enabled

1 Disabled

SP81: Factory Initialization

Factory use only using special tools.

SP82: Data Communication

Factory use only using special tolls.

4-22

2 April 1998 PROGRAM MODES

SP88: Total Copy Counter Display (UP8)

SP88 displays the total copy counter. (This machine uses a software counter rather
than a mechanical counter to count total copies.)

Two digits at a time of the six digits for the counter are displayed on the copy
counter. To view the next two digits, press the Start key.

Lighter Image Density Indicator is lit when the sixth and fifth digits are displayed.
Auto Image Density Indicator is lit when the fourth and third digits are displayed.
Darker Image Density Indicator is lit when the second and first digits are displayed.

This counter is displayed as shown in the SP69 example.

SP90: Factory Data and Counter Clear

Factory use only using special tools.

SP91: Optics Cooling Fan Operation

Factory use only using special tools.

SP95: VL Correction Counter Clear

SP95 resets the exposure lamp data and counter for the VL correction. To clear,
enter “1” and press the Image Density key and the Start key at the same time.

Before performing this mode, clean the optics parts. After performing this mode,
adjust copy quality and then execute SP56. See “Replacement and Adjustment —
Copy Quality adjustment” for details.

SP96: Forced Toner End Reset

SP96 forces the toner end condition to be canceled.
Just selecting SP96 resets the toner near-end or toner end condition.

SP97: Service Call (E5x) Reset

SP97 resets a service call (E5x) condition.
Service call conditions (E5x) cannot be reset by turning the main switch off and on.

Tables

Service

4-23

PROGRAM MODES 2 April 1998

SP98: Total Counter Clear

SP98 clears the total counter.
Normally, this SP mode should not be used.
To clear, enter “1” and press the Image Density key and the Start key at the same

time.

NOTE:

This machine does not come with a mechanical counter installed. A
mechanical counter may be installed as an option.

SP99: All Memory Clear

SP99 clears all counters and returns all modes to the default settings. See the
Clear All Memory Procedure below for more details.

Normally, this SP mode should not be used.
SP99 should be used only when the EEPROM is replaced, or when the machine

malfunctions due to a d amaged EEPRO M.
To clear, enter “1” and press the Image Density key and the Start key at the same

time.

4-24

2 April 1998 PROGRAM MODES

4.2.6 CLEAR ALL MEMORY PROCEDURE

CAUTION:

The Clear All Memory procedure (SP99) resets all the correction data
for copy process control and all the software counters, and returns all
modes and adjustments to the default settings.
Normally, this SP procedure should not be performed.
This procedure is required only when replacing the EEPROM or when
the machine malfunctions due to a damaged EEPROM.

1. Enter SP99.

2. Enter “1”.

3. Press the Image Density key and Start key at the same time.

4. Turn the main switch off and on.

- Recovering the machine af ter a memory reset -

CAUTION:

If SP99 is performed, the V

correction counter is reset and the copy

L

image may be affected. After doing SP99, execute the following
procedure to return the machine to its normal operation.

1. Clean the optics and inside the machine if necessary.

2. Refer to the “SP MODE FACTORY SET DATA” sheet located at front right
corner of the base unit and enter the data that were stored in the following SP
modes at the factory.

•

SP41: Lead Edge Erase Margin

•

SP42: Registration Adjustment

•

SP43: Vertical Magnification Adjustment

•

SP44: Horizontal Magnification Adjustment

•

SP 48: Light In tensity Adju stment

Tables

Service

3. Open SP3 (Destination Setting), and select the appropriate setting to match the
customer’s environment.

4. Check the copy quality and the paper path and do any necessary adjustments
(see Replacement and Adjustment—Copy Quality Adjustment).

4-25

SERVICE TABLES 2 April 1998

4.3 SERVICE TABLES

4.3.1 VARIABLE RESISTORS

Number Location Function

VR100 Main Control Board Adjust the ADS voltage (2.5 ± 0.2 V)

CT Power Pack Adjust the charge and transfer corona

voltage

BPower Pack

G Power Pack Adjust the charge grid voltage

Adjust the standard development bias
voltage

4-26

2 April 1998 SERVICE CALL CONDITIONS

4.4 SERVICE CALL CONDITIONS

NOTE:

1) E-codes are displayed in the copy counter. The “E” and the “code
number” are displayed alternatively.

2) Copying is disabled during a service call condition.

3) To clear the service call condition, turn the main switch off and on.

4) When an “E5x” service call condition occurs, for safety reasons, it
cannot be cleared by turning the main switch off and on. The following
procedure must be performed to clear these service call conditions.

1. Turn on the main switch.

2. Execute SP mode 97.

3. Turn the main switch off and on.

E11: Exposure Lamp Error 1

- Definition -

•

The feedback signal becomes higher than 4.5 volts (rms) for 1.0 second

when the exposure lamp is on.

•

The feedback signal becomes higher than 1.0 volts (rms) for 1.0 second

when the exposure lamp is off.

- Possible Causes -

•

Triac short circuit

•

Exposure lamp open

•

Thermofuse open

•

Defective lamp voltage detection circuit

Tables

Service

E12: Exposure Lamp Error 2

- Definition -

•

The feedback signal falls below 0.5 volts (rms) for 1.0 second when the

exposure lamp is on.

•

The exposure lamp stays on for longer than 25 seconds.

- Possible Causes -

•

Defective power supply board

•

Defective main control board

4-27

SERVICE CALL CONDITIONS 2 April 1998

E13: Zero Cross Signal Error 1

- Definition -

•

The interval between zero cross signal is more than 2.0 seconds.

- Possible Causes -

•

Defective main control board

•

Defective power supply board

•

Zero cross line open

•

CN118 on the main control board or CN404 on the power supply board is not

correctly connected.

E14: Zero Cross Signal Error 2

- Definition -

•

The detected current is not 50 or 60 Hz.

- Possible Causes -

•

Defective main control board

•

Defective power supply board

•

Zero cross line open

•

CN118 on the main control board or CN404 on the power supply board is not

correctly connected.

•

Power frequency not stable

E15: Zero Cross Signal Error 3

- Definition -

•

The detected current is 50 Hz on a 60 Hz machine, or there is an SP3

(destination setting) error.

- Possible Causes -

•

Wrong power line connection

•

SP3 is set to “0”.

•

SP3 input error

4-28

2 April 1998 SERVICE CALL CONDITIONS

E21: Scanner Home Position Error 1

- Definition -

•

The scanner home position sensor’s output remains LOW (de-actuated) for

10 seconds after the main switch is turned on, or the output remains LOW
(de-actuated) after the scanner returns during the copy process.

- Possible Causes -

•

Defective home position sensor

•

Defective scanner drive motor

•

Defective main control board

•

Defective power supply board

E22: Scanner Home Position Error 2

- Definition -

•

The scanner home position sensor’s output remains HIGH (actuated) for 4.0

seconds after the main switch is turned on, or the output remains HIGH
(actuated) for 0.3 seconds after the scanner starts.

- Possible Causes -

Tables

Service

•

Defective home position sensor

•

Defective scanner drive motor

•

Defective main control board

•

Defective power supply board

E28: Lens/Mirror Home Position Error 1 (A227 machine only)

- Definition -

•

The lens/mirror home position sensor’s output remains LOW (de-actuated)

for 5.0 seconds after the main switch is turned on or the reproduction ratio is
changed.

- Possible Causes -

•

Defective lens/mirror home position sensor

•

Defective lens/mirror drive motor

•

Defective main control board

•

Defective lens/mirror drive mechanism

4-29

SERVICE CALL CONDITIONS 2 April 1998

E29: Lens/Mirror Home Position Error 1 (A227 machine only)

- Definition -

•

The lens/mirror home position sensor’s output remains HIGH (actuated) for

5.0 seconds after the switch is turned on or the reproduction ratio is changed.

- Possible Causes -

•

Defective lens/mirror home position sensor

•

Defective lens/mirror drive motor

•

Defective main control board

•

Defective lens/mirror drive mechanism

E40: Optics Thermistor Error

- Definition -

•

Extremly high resistance or open thermistor circuit is detected for 10 seconds

continuously.

- Possible Causes -

•

Defective optics thermistor

•

Defective main control board

•

CN116 on the main control board is not correctly connected.

E52: Fusing Error 1

- Definition -

•

The temperature detected by the thermistor does not reach 100°C within 15

seconds after the main switch is turned on.

- Possible Causes -

•

Defective fusing thermistor

•

Fusing lamp open

•

Defective power supply board

•

Defective main control board

•

CN118 on the main control board or CN404 on the power supply board is not

correctly connected.

4-30

2 April 1998 SERVICE CALL CONDITIONS

E53: Fusing Error 2

- Definition -

•

The temperature detected by the thermistor becomes higher than 230°C for

more than 3.0 seconds.

- Possible Causes -

•

Thermistor short

•

Defective power supply board

•

Defective main control board

•

Fusing harness shorted

•

Triac shorted

E54: Fusing Error 3

- Definition -

•

The temperature detected by the thermistor does not rise to 15°C within 15

seconds after the fusing lamp is turned on during stand-by.

- Possible Causes -

Tables

Service

•

Poor thermistor connection

•

Defective thermistor

•

Defective power supply board

•

Defective main control board

•

Defective fusing lamp

E55: Fusing Error 4

- Definition -

•

Extremely high resistance or open thermistor circuit is detected for 2.0

seconds continuously after 15 seconds after the main switch is turned on.

•

The temperature change detected by the thermistor is more than 20°C within

any one second after 15 seconds after the main switch is turned on.

- Possible Causes -

•

Defective thermistor

•

Defective main control board

•

Defective power supply board

•

Fusing lamp open

•

Poor thermistor connection

4-31

ERROR CODE FOR USER 2 April 1998

4.5 ERROR CODE FOR USER

Error Code Contents

U1

After the temperature around the optics reaches 43°C, making a copy is
disabled until the temperature drops below 40°C.

4-32

6 February 1998 MAINTENANCE ITEMS AND METHODS

5. SERVICE MAINTENANCE

5.1 MAINTENANCE ITEMS AND METHODS

The following items must be done any time the machine receives service.

Action Symbol: L: Lubricate I: Inspect C: Clean A: Adjust

Item Action Method

Optics

Reflectors C Silicon cloth
1st to 5th Mirrors C Silicon cloth
6th Mirror C Silicon cloth
Lens C Blower brush
Exposure Glass C Soft cloth dampened with alcohol or water
Platen Cover Sheet C Soft cloth dampened with water
Scanner Guide Rod L Apply Launa oil to felt pads on the rod
Scanner Guide Rail L G501
4th/5th Mirror Guide Rail L G501

Around Drum

Transfer Corona Unit C Use cleaning tool in the machine
Transfer Corona Guide C Use cleaning tool in the machine
Charge Corona Unit C Use cleaning tool in the machine
Erase Lamp C Blower brush or dry cloth

Paper Feed

Paper Feed Rollers C Soft cloth dampened with water
Bottom Plate Pads C Soft cloth dampened with water
Relay Rollers C Soft cloth dampened with water
Registration Rollers C Soft cloth dampened with water
Paper Feed Guide C Soft cloth dampened with water

Fusing

Hot Roller I Replace if necessary
Hot Roller Bushings I Replace if necessary
Pressure Roller I Replace if necessary
Pressure Roller Bushings I Replace if necessary
Stripper Pawls C Use suitable solvent
Fusing Entrance and Exit

Guide Plates
Fusing Thermistor C Use suitable solvent

C Use suitable solvent

Service

Maintenance

5-1

MAINTENANCE ITEMS AND METHODS 6 February 1998

Item Action Method

Others

ADS A
Exit and Registration

Sensors
Bushings I
Ozone Filter I Replace if necessary
OPC Drum I Replace if necessary

Adjust when the exposure lamp voltage is
changed.

I

5-2

28 February 1998 EXTERIOR

6. REPLACEMENT AND ADJUSTMENT

6.1 EXTERIOR

6.1.1 EXTERIOR COVER/EXPOSURE GLASS REMOVAL

A: Platen cover
B: 2 tapping screws
C: 2 Philips screws

D: Left scale

E: 2 shoulder screws

F: Upper cover

G: 5 Philips screws
H: Operation panel
connector

I: Exposure glass

[B]

[A]

[D]

[E]

[C]

[B]

[C]

A227R500.TIF

[G]

A227R501.TIF

[I]

[F]

6-1

A227R502.TIF

[H]

A227R503.TIF

Adjustment

Replacement

EXTERIOR 28 February 1998

6.1.2 UPPER UNIT REMOVAL

Preparation:

Remove the upper cover and the exposure glass.
(See Exterior Cover/Exposure Glass Removal)

[B]

[D]

A: Five connectors

[A]

(CN109,111,112,117,118)
B: Open the upper unit.
C: Release the gas spring.
D: Snap ring



WARNING

[C]

A227R504.TIF

1. Do not release the gas spring from the pin while the upper unit is closed.
Otherwise, the gas spring will expand suddenly and may cause injury.

2. When the gas spring is released, hold the upper unit to prevent it from falling.

[H]

G: Connector(CN402)
H: Upper unit

[G]

CAUTION:

A227R505.TIF

A227R506.TIF

1) Do not leave the upper unit fully opened.
Otherwise, the upper unit or whole machine may tip over.

2) If the upper unit is opened more than 90 degrees, the exterior cover
of the lower unit might be damaged.

6-2

28 February 1998 OPTICS

6.2 OPTICS

Preparation:

Remove the upper cover and the exposure glass.
(See Exterior Cover/Exposure Glass Removal)

6.2.1 EXPOSURE LAMP REMOVAL

Move the 1st scanner [A] to cut out position [B] of optics unit by rotating the
scanner drive pulley [C]. (Do not grasp the scanner to move it.)

[C]

[B]

A227R507.TIF

D: Adjustment plate

E: Tapping screw

F: Philips screw
G: Lamp harness (2 Philips screws)
H: Exposure lamp

[A]

[D]

[G]

[E][F]

A227R508.TIF

Adjustment

Replacement

NOTE:

A227R620.TIF

[H]

Do not touch the exposure lamp with bare hands.

6-3

OPTICS 28 February 1998

6.2.2 1ST MIRROR REMOVAL

Preparation:

Move the 1st scanner [A] to the cut out position [B] of the optics unit by rotating

the scanner drive pulley [C]. (Do not grasp the scanner to move it.)

[A]

E: 1st mirror
D: Spring plates

[D]

Reinstallation
NOTE:

1) Make sure that the notches in the spring plates are correctly
set in position.

2) Do not touch the mirror surface with bare hands.

3) Make sure that the 1st mirror reflecting surface faces the lamp.

[E]

[C]

[B]

A227R507.TIF

[D]

A227R508.WMF

6-4

28 February 1998 OPTICS

6.2.3 EXPOSURE LAMP THERMOFUSE REMOVAL

Preparation:

Remove the exposure lamp. (See the Exposure Lamp Removal procedure.)

A: Scanner guide rod
B: Rod support plate (2 Philips screws)

[A]

C: Harness clamp (1 tapping screw)
D: Optics thermofuse harness

[C]

[B]

A227R512.TIF

A227R622.TIF

NOTE:

A227R621.TIF

1) Do not touch the scanner guide rod with bare hands.

2) Do not scratch the scanner guide rod.

6-5

[D]

A227R623.TIF

Adjustment

Replacement

OPTICS 28 February 1998

6.2.4 2ND AND 3RD MIRRORS REMOVAL

Preparation:

Slide the 1st scanner until the 2nd scanner [A] comes to the optics cut out
position [B] by rotating the scanner drive pulley. (Do not grasp the scanner to
move it.)

[D]

C:2nd mirror

D: 2 spring plates

E: 3rd mirror

F: 2 spring plates

[A]

[B]

[D]

[C]

A227R514.WMF

[F]

[F]

Reinstallation
NOTE:

1) Make sure that the notches in the spring plates are correctly set in
position.

2) Do not touch the mirror surface with bare hands.

3) Make sure that the 2nd and 3 rd mirror reflecting surface faces the lens.

[E]

A227R515.WMF

6-6

28 February 1998 OPTICS

6.2.5 4TH MIRROR REMOVAL

A: Lens unit cover (1 Philips screw and 1 hook)

[A]

B: 4th mirror

C: 2 spring plates

A227R520.TIF

Reinstallation
NOTE:

1) Make sure that the notches in the spring plates are correctly set in
position.

2) Do not touch the mirror surface with bare hands.

3) Make sure that the 4th mirror reflecting surface faces the lens.

[C]

[B]

A227R521.TIF

[C]

Adjustment

Replacement

6-7

OPTICS 28 February 1998

6.2.6 5TH MIRROR REMOVAL (A227 MODEL)

Preparation:

Remove the lens unit cover. (See 4 th Mirror Removal.)

A: 4th/5th mirror unit

B: E-ring
C: Spring
D: Spring

[B]

[A]

[H]

E: 5th mirror

F: 2 spring plates

NOTE:

1) Do not touch the mirror angle adjustment screw [G].
Parallelogram image adjustment is required if the screw is removed.

2) Do not remove screw fixing the cam plate [H].
Focus adjustment is required if the screw is removed.

[F]

[C]

A227R522.TIF

[D]

[G]

[F]

[E]

A227R534.TIF

Reinstallation

Perform lens and 4TH/5TH mirror position adjustment.

NOTE:

1) Make sure that the notches in the spring plates are correctly set in
position.

2) Do not touch the mirror surface with bare hands.

3) Make sure that the 5th mirror reflecting surface faces the lens.

6-8

28 February 1998 OPTICS

6.2.7 5TH MIRROR REMOVAL (A226 MODEL)

Preparation:

Remove the lens unit cover. (See 4th Mirror Removal.)

A: 4th/5th mirror unit
B: Shoulder screw
C: Spring

D: 5th mirror

E: 2 spring plates

[B]

[A]

[C]

A227R533.TIF

[E]

[F]

NOTE:

1) Do not touch the mirror angle adjustment screw [F].
Parallelogram image adjustment is required if the screw is removed.

Reinstallation
NOTE:

1) Make sure that the notches in the spring plates are correctly set in
position.

2) Do not touch the mirror surface with bare hands.

3) Make sure that the 5th mirror reflecting surface faces the lens.

[D]

A227R534.TIF

[E]

Adjustment

Replacement

6-9

OPTICS 28 February 1998

6.2.8

LENS AND 4TH/5TH MIRROR POSITION ADJUSTMENT

(A227 MODEL)

Preparation:

1) Make sure the cam gear [A] is set.

2) Plug in the power cord and turn on the main switch. (To move the lens to the
home position)

3) Turn off the main switch and unplug the power cord.

4) Remove the lens unit cover. (See 4th Mirror Removal.)

[A]

[B]

[C]

A227R535.TIF

1. Reposition the cam gear [A] so that it’s hole [B] matches the notch in the
bracket [C].

2. Perform the focus adjustment if necessary. (See Focus Adjustment.)

6-10

28 February 1998 OPTICS

6.2.9 LENS AND MIRROR MOTOR REMOVAL

Preparation

1) Remove the upper cover and the exposure glass.

(See Exterior Cover/Exposure Glass Removal.)

2) Remove the upper unit. (See Upper Unit Removal.)

3) Remove the upper registration guide assembly.

(See Power Pack Replacements.)

4) Remove the 4th /5th mirror unit. (See 4th/5th Mirror Replacement.)

[A]

[A]

1. Remove 2 Philips screws [A] while holding the
lens and mirror motor unit [B] from bottom
side of the top unit.

2. Remove the Lens and m irror motor [C] (2 Philips screws).

Reinstallation

Perform the Lens And 4th/5th Mirror Position Adjustment.

[B]

[C]

A227R537.TIF

A227R536.TIF

Adjustment

Replacement

6-11

OPTICS 28 February 1998

6.2.10 SCANNER WIRE REMOVAL

Preparation

Remove the upper cover and the exposure glass. (See Exterior Cover/Exposure
Glass Removal.)

[B]

[A]

[C]

[E]

[B]

A227R624.TIF

[D]

A: Fan motor assembly

B: 3 tapping screws
C: Scanner home position sensor actuator plate (1 Philips screw)
D: Scanner wire

E: Tension spring

Reinstallation

1. Hook the beaded end of the wire in

the slot [F] on the scanner motor
bracket [G].

[F]

A227R626.TIF

[G]

6-12

A227R625.TIF

28 February 1998 OPTICS

2. Route the scanner drive wire around the pulleys as shown.

3. Hook the other end of the wire to the tension spring [E].

[E]

A227R538.WMF

4. Move the 2nd scanner so that the 2nd scanner pulley [H] position matches the

position of the hole [I] in the optics frame.

5. Fix the scanner home position sensor actuator plate [C] to the scanner wire so

that distance between the 1st scanner and the 2nd scanner is 77.5 mm.

6. Adjust vertical magnification. (See Vertical Magnification Adjustment.)

[I]

[C]

Adjustment

Replacement

77.5mm

[H]

A227R601.TIF

6-13

AROUND THE DRUM UNIT 28 February 1998

6.3 AROUND THE DRUM UNIT

6.3.1 OPC DRUM REMOVAL

Preparation

1) Open the upper cover.

2) Remove the CTDM.

1. Push the OPC drum [A] to the

front.

2. Pull down rear side of the OPC

drum.

3. Remove the OPC drum.

Reinstallation
NOTE:

1) Remove the protection
sheet after setting.

2) Clear the OPC
counter.(SP66)

[A]

A227R541.TIF

6-14

28 February 1998 AROUND THE DRUM UNIT

6.3.2 CHARGE CORONA UNIT REMOVAL

Preparation

1) Remove the upper cover and the
exposure glass.
(See Exterior Cover/Exposure Glass
Removal.)

2) Remove the OPC drum. (See OPC
Drum Removal.)

A: Charge corona power cable
B: Grid power cable
C: Quenching lamp harness (CN113) on
the main control board

[B]

[A]

A227R627.TIF

[C]

D: ADS sensor connector
E: Front stay

Mark the original position of the
fixing screw [F]
G: 2 tappin g screws
Remove screw [F].
H: 3 Philips screws

I: Charge corona unit

[E]

Reinstallation:

1. Fix the charge corona unit at
the marked original position.

2. Confirm the side to side image
density using the OS-A4 test
chart.

[I]

[G]

[H

[D]

[F]

[G]

A227R631.TIF

Adjustment

Replacement

6-15

AROUND THE DRUM UNIT 28 February 1998

6.3.3 ERASE LAMP REMOVAL

Preparation

1) Remove the upper cover and the

exposure glass.
(See Exterior Cover/Exposure
Glass Removal.)

2) Remove the OPC drum. (See

OPC Drum Removal.)

3) Remove the fan motor. (See

Scanner Wire Removal.)

4) Remove the main control board.

(See Power Pack Removal.)

A: ADS sensor connector
B: 3 screws
C: Front stay

D: 3 high voltage cables
E: Quenching lamp harness (CN113)
F: Erase lamp harness (CN107)

[B]

[A]

[C]

A227R632.TIF

[F]

[D]

[E]

A227R641.TIF

6-16

28 February 1998 AROUND THE DRUM UNIT

G: Rear stay

[H]: 2 screws
I: Drum housing
J: Erase lamp (2 tapping screws)

[H]

[H]

[G]

A227R640.TIF

[I]

[J]

A227R545.TIF

Adjustment

Replacement

6-17

PAPER FEED 28 February 1998

6.4 PAPER FEED

Preparation:

1) Remove the upper cover and the exposure glass. (See Exterior
Cover/Exposure Glass Removal)

2) Remove the upper unit. (See upper unit Removal)

3) Remove the paper tray.

6.4.1 PAPER FEED CLUTCH REMOVAL

[D]

A227R546.TIF

A: Philips screw
B: Turn 180 degrees.

NOTE:

Do not touch the feed roller
with bare hands.

C: Connector
D: Paper feed clutch (1 Philips screw)

[B]

[A]

[D]

[C]

A227R547.TIF

Reinstallation

When reinstallin g the clutch, engage the notch
[E] with the stopper [F].

6-18

[E]

[F]

A227R548.TIF

28 February 1998 PAPER FEED

6.4.2 PAPER FEED ROLLER REMOVAL

Preparation:

Remove the paper feed clutch.

Remove the paper feed roller assembly as shown. (Do not touch the rollers with
bare hands.)

A227R549.TIF

Adjustment

Replacement

6-19

PAPER FEED 28 February 1998

6.4.3 REGISTRATION SOLENOID REMOVAL

Preparation:

Remove the paper feed clutch.

[B]

[F]

[A]

A227R550.WMF

A: Registration solenoid connector

Machine Bottom Side:

B: Registration solenoid cover (2 tapping screws)
C: Registration solenoid (1 tapping screw)

Reinstallation

NOTE:

1) Make sure the solenoid plate [D]
is positioned into the registration
stopper plate [E] correctly.

2) Make sure the solenoid harness
is secured under the harness
hook [F].

A227R551.TIF

[D]

[E]

[C]

A227R552.TIF

6-20

28 February 1998 FUSING

6.5 FUSING

Preparation:

1) Remove the upper cover and the exposure glass. (See Exterior
Cover/Exposure Glass Removal.)

2) Remove the upper unit. (See Upper Unit Removal.)

6.5.1 FUSING UPPER UNIT REMOVAL

[C]

Connectors [A] [B] [C] [D]

E: Fusing upper unit (4 tapping

screws)

[A]

[B]

[E]

[D]

A227R553.TIF

Adjustment

Replacement

NOTE:

1) Do not touch the
fusing rollers with
bare hands.

A227R554.TIF

6-21