4.1 SERVICE CALL CONDITIONS.....................................................A294 II-14
A294 II-x
18 July, 2001GENERAL CAUTIONS
4. SERVICE TABLES
4.1 GENERAL CAUTIONS
Do not turn off either of the power switches while any of the electrical components
are active. Doing so might cause damage to units such as the transfer belt, drum,
and development unit when they are pulled out of or put back into the copier.
4.1.1 DRUM
An organic photoconductor (OPC) drum is more sensitive to light and ammonia gas
than a selenium drum. Follow the cautions below when handling an OPC drum.
1. Never expose the drum to direct sunlight.
2. Never expose the drum to direct light of more than 1,000 Lux for more than a
minute.
3. Never touch the drum surface with bare hands. When the drum surface is
touched with a finger or becomes dirty, wipe it with a dry cloth or clean it with
wet cotton. Wipe with a dry cloth after cleaning with wet cotton.
4. Never use alcohol to clean the drum; alcohol dissolves the drum surface.
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5. Store the drum in a cool, dry place away from heat.
6. Take care not to scratch the drum as the drum layer is thin and is easily
damaged.
7. Never expose the drum to corrosive gases such as ammonia gas.
8. Always keep the drum in the protective sheet when keeping the drum unit, or
the drum itself, out of the copier. Doing so avoids exposing it to bright light or
direct sunlight, and will protect it from light fatigue.
9. Dispose of used drums in accordance with local regulations.
10. When installing a new drum, do the Auto Process Control Data Adjustment (SP
2-962).
4.1.2 DRUM UNIT
1. Before pulling out the drum unit, place a sheet of paper under the drum unit to
catch any spilt toner.
2. Make sure that the drum unit is set in position and the drum stay is secured
with a screw before the main switch is turned on. If the drum unit is loose, poor
contact of the drum connectors may cause electrical noise, resulting in
unexpected malfunctions (RAM data change is the worst case).
3. To prevent drum scratches, remove the development unit before removing the
drum unit.
4-1
GENERAL CAUTIONS18 July, 2001
4.1.3 TRANSFER BELT UNIT
1. Never touch the transfer belt surface with bare hands.
2. Take care not to scratch the transfer belt, as the surface is easily damaged.
3. Before installing the new transfer belt, clean all the rollers and the inner p art of
the transfer belt with a dry cloth to prevent the belt from slipping.
4.1.4 SCANNER UNIT
1. When installing the exposure glass, make sure that the white p aint is at the rear
left corner.
2. Clean the exposure glass with alcohol or glass cleaner to reduce the amount of
static electricity on the glass surface.
3. Use a cotton pad with water or a blower brush to clean the mirrors and lens.
4. Do not bend or crease the exposure lamp flat cable.
5. Do not disassemble the lens unit. Doing so will throw the lens and the copy
image out of focus.
6. Do not turn any of the CCD positioning screws. Doing so will throw the CCD out
of position.
4.1.5 LASER UNIT
1. Do not loosen the screws that secure the LD drive board to the laser diode
casing. Doing so would throw the LD unit out of adjustment.
2. Do not adjust the variable resistors on the LD unit, as they are adjusted in the
factory.
3. The polygon mirror and F-theta lenses are very sensitive to dust. Do not open
the optical housing unit.
4. Do not touch the glass surface of the polygon mirror motor unit with bare
hands.
4-2
18 July, 2001GENERAL CAUTIONS
4.1.6 CHARGE CORONA
1. Clean the corona wires with a dry cloth. Do not use sandpaper or solvent.
2. Clean the charge corona casing with water first to remove NOx based
compounds. Then clean it with alcohol if any toner still remains on the casing.
3. Clean the end block with a blower brush first to remove toner and paper dust.
Then clean with alcohol if any toner still remains.
4. Do not touch the corona wires with bare hands. Oil stains from fingers may
cause uneven image density on copies.
5. Make sure that the wires are correctly between the cleaner pads and that there
is no foreign material (iron filings, etc.) on the casing.
6. When installing new corona wires, do not bend or scratch the wire surface.
Doing so may cause uneven charge. Also be sure that the corona wires are
correctly positioned in the end blocks. (See Charge Corona Wire Replacement)
7. Clean the grid plate with a blower brush (not with a dry cloth).
8. Do not touch the charge grid plate with bare hands. Also, do not bend the
charge grid plate or make any dent in it. Doing so may cause uneven charge.
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4.1.7 DEVELOPMENT
1. Be careful not to nick or scratch the development roller.
2. Place the development unit on a sheet of paper after removing it from the
copier.
3. Never disassemble the development roller assembly. The position of the doctor
plate is set with special tools and instruments at the factory to ensure the
proper gap between the doctor blade and the development roller.
4. Clean the drive gears after removing used developer.
5. Dispose of used developer in accordance with local regulations.
6. Never load types of developer and toner into the development unit other than
specified for this model. Doing so will cause poor copy quality and toner
scattering.
7. Immediately after installing new developer, the TD sensor initial setting
procedure should be performed to avoid damage to the copier. Do not perform
the TD sensor initial setting with used developer. Do not make any copies
before doing the TD sensor initial setting.
8. When u sing a vacuum cleaner to clean the development unit casing, al ways
ground the casing with your fingers to avoid damaging the toner density sensor
with static electricity.
9. When replacing the TD sensor, the developer should be replaced and then the
TD sensor initial setting procedure (SP2-801) should be done, followed by
process control initialization (SP2-962).
4-3
GENERAL CAUTIONS18 July, 2001
4.1.8 CLEANING
1. When servicing the cleaning section, be careful not to damage the edge of the
cleaning blade.
2. Do not touch the cleaning blade with bare hands.
3. Before disassembling the cleaning section, place a sheet of paper under it to
catch any toner falling from it.
4.1.9 FUSING UNIT
1. After installing the fusing thermistor, make sure that it is in contact with the hot
roller and that it is movable.
2. Be careful not to damage the edges of the hot roller strippers or their tension
springs.
3. Do not touch the fusing lamp and rollers with bare hands.
4. Make sure that the fusing lamp is positioned correctly and that it does not touch
the inner surface of the hot roller.
4.1.10 PAPER FEED
1. Do not touch the surface of the pick-up, feed, and separation rollers.
2. To avoid paper misfeeds, the side fences and end fence of the paper tray must
be positioned correctly to align with the actual paper size.
4.1.11 USED TONER
1. We recommend checking the amount of used toner at every EM.
2. Dispose of used toner in accordance with local regulations. Never throw toner
into an open flame, for toner dust may ignite.
4-4
18 July, 2001SERVICE PROGRAM MODE
4.2 SERVICE PROGRAM MODE
4.2.1 SERVICE PROGRAM MODE OPERATION
The service program (SP) mode is used to check electrical data, change modes,
and adjust values.
Service Program Access Procedure
Entering SP mode
1) Press the following keys in sequence.
!
Hold the " key for more than 3 seconds.
2) A menu of SP modes is displayed on the LCD.
→
!
"
→
→
#
→
"
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Service
A294M001.PCX
NOTE: The installed applications appear as Copy SP and Printer SP. If the
printer application is not installed, its name does not appear.
4-5
SERVICE PROGRAM MODE18 July, 2001
3) Touch the application which you need. Then, the application’s SP mode
display will appear, as shown.
A294M002.PCX
Exiting SP mode
1) Touch the “Exit” keys to return to the standby mode display.
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18 July, 2001SERVICE PROGRAM MODE
Accessing Copy Mode from within an SP Mode
1) Touch the “Copy Mode” key.
A294M003.PCX
2) Select the appropriate copy mode and make trial copies.
3) To return to the SP mode, touch the “SP mode” key.
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Service
4-7
A294M004.PCX
SERVICE PROGRAM MODE18 July, 2001
Selecting the Program Number
Program numbers are composed of two or three levels.
There are two ways to select the program number.
Ten-key Pad
Input the required program number.
Touch Panel
1) Touch the 1st level program.
2) Touch the 2nd level program.
NOTE: A “*” mark indicates that there are 3rd level programs.
3) Touch the 3rd level program.
A294M002.PCX
A294M003.PCX
4-8
18 July, 2001SERVICE PROGRAM MODE
A294M005.PCX
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Service
4-9
SERVICE PROGRAM MODE18 July, 2001
Inputting a Value or Setting for an SP Mode
1. Select the required program mode as explained on the previous page.
2. Enter the required setting using the ten-key pad, then touch the “Start” key or
OK key or $ key.
NOTE: 1) If you forget to touch the “Start” key or OK key, the previous value
remains.
2) Change between “+” and “–” using the “•” key before entering the
required value.
3. Exit SP mode.
4-10
18 July, 2001SERVICE PROGRAM MODE
4.2.2 SERVICE PROGRAM MODE TABLES
NOTE: 1) In the Function column, comments are in italics.
2) In the Settings column, the default value is in bold letters.
3) S and B in the right hand side of the mode number column means that
this mode is stored in the NVRAM on the SICU (S) or BCU (B). If you do
a RAM reset, all these SP modes will be reset to their factory settings.
4) [A294 I], [A295 I], [A294 II] and [A295 II] in the Settings column mean
the following product types:
[A294 I]: Existing 85 cpm model. [A295 I]: Existing 105 cpm model.
[A294 II]: Enhanced 85 cpm model. [A295 II]: Enhanced 105 cpm
model.
1-001
1-002
Mode No.
(Class 1, 2 and 3)
Leading Edge Registration
Paper Tray
1
(Copier and
LCT)
2Duplex Tray
Side-to-Side Registration
1Tray-1
2Tray-2
FunctionSettings
Adjusts the printing leading edge
registration for feeding from the trays using
the trimming area pattern (SP2-902-3,
No.15).
B
Use the “
before entering the value.
The specification is 3
See "Replacement and Adjust m ent – Copy
Image Adjustments" for details.
Adjusts the printing leading edge
registration for the duplex feeding using the
trimming area pattern (SP2-902-3, No.15).
Use the “
before entering the value.
B
The specification is 3
See "Replacement and Adjust m ent – Copy
Image Adjustments" for details.
Adjusts the printing side-to-side registration
from the 1st paper feed station using the
trimming area pattern (SP2-902-3, No.15).
B
Use the “
before entering the value.
See “Replacement and Adjustment – Copy
Image Adjustments” for details on SP1-002.
Adjusts the printing side-to-side registration
from the 2nd paper feed station using the
trimming area pattern (SP2-902-3, No.15).
Use the “
before entering the value.
B
The specification is 0
•
” key to toggle between + and –
±
2 mm.
•
” key to toggle between + and –
±
2 mm.
•
” key to toggle between + and –
•
” key to toggle between + and –
±
2.0 mm.
+9 ~ –9
0.1 mm/step
+3.0 mm
+9 ~ –9
0.1 mm/step
–1.5 mm
+9 ~ –9
0.1 mm/step
–1.5 mm
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SERVICE PROGRAM MODE18 July, 2001
1-002
1-003
Mode No.
(Class 1, 2 and 3)
Side-to-Side Registration
3Tray-3
4Tray-4 (LCT)
5Tray-5 (LCT)
6Tray-6 (LCT)
7Duplex Tray
Paper Buckle Adjustment (Registration)
1Copier Paper
Tray
2LCT Tray
3Duplex TrayB
Duplex Fence Adjustment1-008
Fusing Idling After Low Power Mode1-103
Adjusts the printing side-to-side registration
from the 3rd paper feed station using the
trimming area pattern (SP2-902-3, No.15).
Use the “
B
before entering the value.
The specification is 0
Adjusts the printing side-to-side registration
from the 4th paper feed station using the
trimming area pattern (SP2-902-3, No.15).
B
Use the “
before entering the value.
The specification is 0
Adjusts the printing side-to-side registration
from the 5th paper station using the
trimming area pattern (SP2-902-3, No.15).
B
Use the “
before entering the value.
The specification is 0
Adjusts the printing side-to-side registration
from the 6th paper station using the
trimming area pattern (SP2-902-3, No.15).
B
Use the “
before entering the value.
The specification is 0
Adjusts the printing side-to-side registration
from the duplex tray using the trimming
area pattern (SP2-902-3, No.15).
B
Use the “
before entering the value.
The specification is 0
Adjusts the relay clutch timing at
B
registration. The relay clutch timing
determines the amount of paper buckle at
B
registration. (A +ve setting leads to more
buckling.)
Adjusts the distance between the front and
B
rear fences.
Selects whether fusing idling is done or not
when recovering from the low power mode.
FunctionSettings
•
” key to toggle between + and –
±
2.0 mm.
•
” key to toggle between + and –
±
2.0 mm.
•
” key to toggle between + and –
±
2.0 mm.
•
” key to toggle between + and –
±
2.0 mm.
•
” key to toggle between + and –
±
2.0 mm.
+9 ~ –9
0.1 mm/step
–1.5 mm
+9 ~ –9
0.1 mm/step
–2.5 mm
+9 ~ –9
0.1 mm/step
–2.5 mm
+9 ~ –9
0.1 mm/step
–2.5 mm
+9 ~ –9
0.1 mm/step
–3.0 mm
+9 ~ –9
1 mm/step
+4.0 mm
+4 ~ –4
0.5 mm/step
0.0 mm
0: Not done
1: Done
B
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18 July, 2001SERVICE PROGRAM MODE
1-105
Mode No.
(Class 1, 2 and 3)
Fusing Temperature Adjustment
Fusing
1
Temperature in
Waiting
Condition
2Fusing
Temperature
Lower Limit
3Fusing
Temperature
Correction
(<A4/LT)
4Fusing
Temperature
Correction
(A4/LT)
Fusing Temperature Display1-106
Fusing Nip Band Check1-109
Web Motor Control1-902
1Web
Consumption
Adjusts the fusing temperature for standby.
B
Adjusts the fusing temperature lower limit.
When the fusing unit falls below this
temperature, the machine stops copying.
Copying automatically restarts when the
B
fusing temperature recovers.
This SP mode is for designer’s use only.
Specifies the amount to raise the fusing
temperature from standby mode to print on
A4/LT or smaller width paper.
B
Specifies the amount to raise the fusing
temperature from standby mode to print on
paper of A4/LT width.
B
Displays the fusing temperature.
Feeds a sheet from a paper tray and stops
the sheet when it is between the hot roller
and the pressure roller. Use an OHP sheet.
After keeping the sheet there for 30
seconds, the sheet is automatically fed out.
For details, see Replacement and
Adjustment – Fusing.
Displays the percentage of the web
consumption in 1% steps (0% ~ 107%).
The value can be manually input using
B
number keys.
FunctionSettings
[A294 I & II]
168 ~ 178
1°C/step
173°°°°C
[A295 I & II]
173 ~ 178
1°C/step
178°°°°C
[A294 I & II]
157 ~ 163
1°C/step
163°°°°C
[A295 I & II]
157 ~ 167
1°C/step
167°°°°C
+0 ~ +20
1°C/step
[A294 I & II]
+15°°°°C
[A295 I & II]
+20°°°°C
–5 ~ +20
1°C/step
[A294 I]
+10°°°°C
[A295 I]
+15°°°°C
[A294 II]
+5°°°°C (US)
+10°°°°C (EU)
[A295 II]
+5°°°°C (US)
+15°°°°C (EU)
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SERVICE PROGRAM MODE18 July, 2001
1-902
2-001
Mode No.
(Class 1, 2 and 3)
Web Motor Control
Web Motor
2
Drive Interval
Web Motor
3
Drive Time
Web Near End
4
Setting
Duplex Stop Position – Right1-906
Charge Corona Bias Adjustm ent
1Image Area
(Auto Process
Control OFF)
2ID Sensor
Pattern (Auto
Process Control
OFF)
Change the interval of copy operation time
after which the web motor is driven
B
Changes the time that the web motor is
driven.
B
Changes the web consumption ratio at
which web near end is displayed.
About 40k A4 copies can be made after the
B
web consumption reaches 100%.
Changes the paper stop position in the
duplex unit after passing duplex transport
B
sensor 2.
For designer use only.
Adjusts the voltage applied to the grid plate
during copying when auto process control
is off.
Normally, there is no need to adjust this.
B
If there is an ID or TD sensor problem, the
machine goes into fixed toner supply mode.
After replacing the drum or charge corona
wire, change this value to the default.
Adjusts the voltage applied to the grid plate
when making the ID sensor pattern, when
auto process control is switched off.
Normally, there is no need to adjust this.
If the user wants high density copies, the
B
sensor pattern must be lighter, so this
voltage must be a higher negative voltage.
FunctionSettings
[A294/A295 I]
15 ~ 130
1 s/step
[A294 I] 42 s
[A295 I] 34 s
[A294/A295 II]
3 ~ 130
1 s/step
[A294 II]
11 s (EU)
21 s (US)
[A295 II]
9 s (EU)
17 s (US)
[A294/A295 I]
0.1 ~ 3.0
0.1 s/step
0.8 s
[A294/A295 II]
0.3 ~ 3.5
0.1 s/step
2.8 s
0 ~ 105
1%/step
[A294/A295 I]
100%
[A294/A295 II]
86% (EU)
90% (US)
–10 ~ 10
2 mm/step
–8 mm
–600 ~ –1,300
10 V/step
–1,000 V
–600 ~ –1,300
10 V/step
–800 V
4-14
18 July, 2001SERVICE PROGRAM MODE
2-001
2-101
Mode No.
(Class 1, 2 and 3)
Charge Corona Bias Adjustm ent
Image Area
3
(Auto Process
Control ON)
Adjusts the voltage applied to the grid plate
during copying when auto process control
is switched on.
B
This voltage changes every time auto
process control starts up (every time the
machine is switched on)
4Grid Voltage for
Transparent
Sheet
Adjusts the voltage applied to the grid plate
when translucent mode is selected.
Use this if there is a copy quality problem
B
when making copies on translucent paper.
Normally there is no need to adjust this.
See 2-001-1.
5Total Corona
Current
Total Corona
6
Current (Photo
mode)
D
7V
(Auto
Process
Control)
Adjusts the current applied to the charge
corona wire except for Photo mode.
B
Adjusts the current applied to the charge
corona wire for Photo mode.
B
Adjusts the target V
Control Initial Setting.
B
Printing Erase Margin
Adjusts the leading edge erase margin.1Leading Edge
See “Replacement and Adjustment – Copy
S
Image Adjustments” for more on SP2-101.
FunctionSettings
–600 ~ –1,300
10 V/step
[A294/A295 I]
–1,000 V
[A294/A295 II]
–950 V
–600 ~ –1,300
10 V/step
[A294/A295 I]
–1,070 V
[A294/A295 II]
–950 V
–1,400 ~
–2,800
100µA/step
–1,400 µµµµA
1,400 ~
–2,800
100µA/step
–1,600 µµµµA
D
voltage for Process
–800 ~ –1,000
10 V/step
[A294/A295 I]
–970 V
[A294/A295 II]
–850 V
0.0 ~ 9.0
0.1 mm/step
2.5 mm
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Service
2-103
4Right
LD Power Adjustment
2LD2 - 600dpi
Adjusts the trailing edge erase margin.2Trailing Edge
S
Adjusts the left side erase margin.3Left
S
Adjusts the right side erase margin.
S
Adjusts the power of LD1.1LD1 - 600dpi
Do not change the value.
B
Adjusts the power of LD2.
Do not change the value.
B
4-15
0.0 ~ 9.0
0.1 mm/step
2.5 mm
0.0 ~ 9.0
0.1 mm/step
2.0 mm
0.0 ~ 9.0
0.1 mm/step
2.0 mm
–127 ~ +127
1/step
1 = 1.1 µW
+0
–127 ~ +127
1/step
1 = 1.1 µW
+0
SERVICE PROGRAM MODE18 July, 2001
2-103
2-114
2-201
Mode No.
(Class 1, 2 and 3)
LD Power Adjustment
Adjusts the power of LD3.3LD3 - 600dpi
Do not change the value.
B
Adjusts the power of LD4.4LD4 - 600dpi
Do not change the value.
B
LD1 Power
5
Adjustment
(Start/End)
LD2 Power
6
Adjustment
(Start/End)
LD3 Power
7
Adjustment
(Start/End)
LD4 Power
8
Adjustment
(Start/End)
LD Power Adjustment (for ID pattern)2-104
Printer Dot Edge Parameter Setti ng
1Leading Dot
Level Setting
(Left Edge)
2Trailing Dot
Level Setting
(Right Edge)
3Multiple Dot
Level SettingS
4Independent
Dot Level
Setting
Development Bias Adjustment
2ID Sensor
Pattern
Factory use only. Do not use this SP
B
mode.
Factory use only. Do not use this SP
B
mode.
Factory use only. Do not use this SP
B
mode.
Factory use only. Do not use this SP
B
mode.
Selects the LD power for making the ID
pattern when auto process control is
B
switched on. Do not use unless advised.
Changes the LD power level for the left
S
edge pixel in printer mode, if FCI is off.
Changes the LD power level for the left
S
edge pixel in printer mode, if FCI is off.
Changes the LD power level for continuous
pixels in printer mode, if FCI is off.
Changes the LD power level for
S
independent dots in printer mode, if FCI is
off.
Adjusts the development bias for copying.1Image Area
This can be adjusted as a temporary
measure if faint copies appear due to an
B
aging drum.
Adjusts the development bias for making
the ID sensor pattern for V
when the auto process control is set to off.
This should not be used in the field,
B
because it affects ID sensor pattern
density, which affects toner supply.
FunctionSettings
–127 ~ +127
1/step
1 = 1.1 µW
+0
–127 ~ +127
1/step
1 = 1.1 µW
+0
Start
Stop
Start
Stop
Start
Stop
Start
Stop
0 ~ 7
1/step
4
20 ~ 100%
1% step
50%
20 ~ 100%
1% step
50%
20 ~ 100%
1% step
100%
20 ~ 100%
1% step
50%
–200 ~ –700
10 V/step
[A294/A295 I]
–530 V
[A294/A295 II]
–650 V
–200 ~ –700
SP
measurement
10 V/step
–400 V
4-16
18 July, 2001SERVICE PROGRAM MODE
2-201
2-207
2-208
2-209
2-210
Mode No.
(Class 1, 2 and 3)
Development Bias Adjustment
Transparent
3
Sheet
B
4ID Sensor
Development
Potential
B
Forced Toner Supply
1Forced Toner
Supply
2Toner Bank
Toner Setup
Toner Supply Mode
B
Toner Supply Rate
B
ID Sensor Pattern Interval
FunctionSettings
Adjusts the development bias for copying
onto translucent sheets.
Adjusts the development potential for
making the ID sensor pattern for V
SP
measurement when the auto process
control is set on.
Forces toner supply for 7 seconds from the
toner bank through the toner hopper to the
development unit.
This mode finishes automatically after the
toner is supplied 7 times (1 s for each
time).
Turns on the main motor, development
motor, development bias, toner supply
motor and charge corona. Then turns on
the toner supply coil clutch to supply toner
to the toner hopper, but not to the
development unit. It takes about 7 minutes.
This mode should be used to fill the toner
transport path with toner after cleaning the
toner supply unit, or at installation.
Selects the toner supply mode.
Use image pixel count mode only as a
temporary countermeasure if the ID or TD
sensor is defective.
Adjusts the toner supply rate from the
hopper.
Increasing this value reduces the toner
supply roller clutch on time. Use a lower
value if the user tends to make lots of
copies that have a high proportion of black.
Changes the interval for making the ID
sensor pattern (V
SP/VSG
detection).
If the user normally makes copies with a
high proportion of black, reduce the
interval.
–200 ~ –700
10 V/step
[A294/A295 I]
–530 V
[A294/A295 II]
–650 V
180 ~ 380
1 V/step
280 V
Start
Start
Sensor
Control
Pixel Count
Control
100 ~ 2,000
10 mg/s/step
[A294 I & II]
800 mg/s
[A295 I & II]
1000 mg/s
0 ~ 500
1 copy/step
10 copies
Tables
Service
B
4-17
SERVICE PROGRAM MODE18 July, 2001
2-220
2-301
Mode No.
(Class 1, 2 and 3)
REF
V
Manual Setting
B
VT Display2-223
B
Toner Bank Toner Discharge2-226
Toner Supply Mode Display2-227
Transfer Current Adjustment
11st Copy Side
B
FunctionSettings
Adjusts the TD sensor reference voltage
REF
(V
).
Change this value after replacing the
development unit with another one that
already contains toner.
For example, when using a development
unit from another machine for test
purposes, do the following:
1. Check the value of SP2-220 in both the
machine containing the test unit and the
machine that you are going to move it to.
2. Install the test development unit, then
input the V
for this unit into SP2-220.
REF
3. After the test, put back the old
development unit, and change SP2-220
back to the original value.
Displays the current TD sensor output
voltage.
This SP removes toner from the toner bank
to the toner hopper.
After turning the toner supply motor and the
toner bank motor on, the toner supply coil
clutch turns on and off at 2 second
intervals. The motors and clutch stop when
the toner near-end sensor (in the toner
bank unit) detects no toner.
Even if the sensor continues to detect
toner, this operation stops when the clutch
has been turned on and off 10 times, so
this SP may have to be repeated to clean
out the system completely.
Displays the toner supply mode used for
the last copy.
1: ID Sensor and TD Sensor (from the 11th
copy, using V
T
– V
REF
)
2: ID Sensor and TD Sensor (using
SP/VSG
V
) – before the 10th copy of a job
3: TD Sensor – temporary mode when ID
sensor output is abnormal
4: Image Pixel Count
Adjusts the current applied to the transfer
belt during copying on the 1st side of the
paper.
If the user uses thicker paper, the current
may have to be increased to ensure
sufficient transfer of toner.
0 ~ 5.0
0.01 V/step
2.5 V
Start
10 ~ 200
1 µA/step
[A294 I & II]
120 µµµµA
[A295 I & II]
140 µµµµA
4-18
18 July, 2001SERVICE PROGRAM MODE
2-301
2-506
2-801
Mode No.
(Class 1, 2 and 3)
Transfer Current Adjustment
2Thick Paper
3OHP Sheet
4Transparent
Paper
52nd Copy
6Between Pages
Cleaning Interval – Multiple Copy
1On/Off
2Interval
TD Sensor Initial Setting
Adjusts the current applied to the transfer
belt during copying on thick paper.
See above.
B
Adjusts the current applied to the transfer
belt during copying on OHP sheet.
B
See above. If the user normally feeds
thicker paper from the bypass tray, use a
higher setting.
Adjusts the current applied to the transfer
belt during copying on translucent paper.
B
Adjusts the current applied to the transfer
belt during copying on the 2nd side of the
paper.
B
Adjusts the current applied to the transfer
belt between the pages.
B
Selects whether multiple copy jobs are
stopped at regular intervals for the following
purposes.
1. Stop and turn the drum motor in reverse
2. Make an ID sensor pattern to correct the
B
The interval depends on SP2-506-2.
Use if the drum gets dirty or images get too
pale or too dark during a long job.
Normally keep at ‘No’, because the ‘Yes’
setting causes the machine to stop copying
every 15 minutes, which may cause
problems for the customer.
Selects the interval at which multi copy jobs
are stopped.
B
Performs the TD sensor initial setting. This
SP mode controls the voltage applied to the
TD sensor to make the TD sensor output
about 2.5 V. After finishing this, the TD
B
sensor output voltage is disp layed.
Use this mode only after changing the TD
sensor or the developer.
FunctionSettings
to clean the cleaning blade edge
toner density control.
10 ~ 200
1 µA/step
[A294 I & II]
120 µµµµA
[A295 I & II]
140 µµµµA
10 ~ 200
1 µA/step
140 µµµµA
10 ~ 200
1 µA/step
[A294 I & II]
120 µµµµA
[A295 I & II]
140 µµµµA
10 ~ 200
1 µA/step
[A294 I & II]
120 µµµµA
[A295 I & II]
140 µµµµA
10 ~ 200
1 µA/step
20 µµµµA
1: No
2: Yes
1 ~ 100
1 minute/step
30 minutes
Start
Tables
Service
4-19
SERVICE PROGRAM MODE18 July, 2001
2-803
2-804
2-813
2-902
2-909
Mode No.
(Class 1, 2 and 3)
Corona Wire Cleaner On
Turns on the corona wire cleaner manually.
When copy density across the paper is
uneven at EM, clean the wire with this
mode.
Charge Corona Cleaner Setting
1Corona Wire
Cleaner
Operation
Setting
2Operation
IntervalB
Printer Gamma Setting
Printing Test Pattern
2IPU Test
Pattern
Selection
(for Scanner)
3Printing Test
Pattern
4Outer I/F Block
Test Pattern
Frequency
5
Pattern Density
Vcont Manual Setting2-906
Main Scan Magnification
1Copier
Selects when automatic corona wire
cleaning is done.
0: Corona wire cleaning is not done.
1: When process control initial setting is
B
2: At the period set in SP2-804-2.
Selects the interval for automatic corona
wire cleaning.
Select if printer gamma correction is
applied or not.
S
This SP mode is for designer use only.
Prints the test patterns for the IPU chip.
See section 4.2.3. for how to print test
patterns.
This SP mode is useful for finding whether
the SICU or the SBU is defective. If the
printout is not OK, the SICU is defective.
Prints the printer test patterns.
See section 4.2.3. for how to print test
patterns.
Example: 15. Trimming Area
This SP mode is useful for finding whether
the LDDR or the SICU is defective. If the
printout is not OK, the LDDR is defective.
Prints the test patterns for the IPU chip.
See section 4.2.3. for how to print test
patterns.
This SP mode is useful for finding whether
the SICU or the printer application is
defective. If the printout is not OK, the
SICU is defective.
Designer use only.
B Factory use only.
Adjusts the magnification in the main scan
direction for copy mode.
Use the “
S
See “Replacement and Adjustment – Copy
Image Adjustments” for details.
FunctionSettings
done, if the copy number after the last
cleaning operation is over the number
set in SP2-804-2.
•
” key to toggle between + and –.
Start
[A294/A295 I]
0: Not done
1: Done
2:Periodically
[A294/A295 II]
0: Not done
1: Done
2:Periodically
100 ~ 10,000
100 print/step
5,000
0: Applied
1: Not applied
9.7 V
–2.0 ~ +2.0
0.1%/step
+0.0%
4-20
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