Sharp MX-2600N / MX-3100N / MX-2600G / MX-3100G (serv.man7) Service Manual ▷ View online
MX-3100N ADJUSTMENTS 6 – 4
ADJ 2
Adjust the developing roller
main pole
main pole
This adjustment is needed in the following situations:
* The developing unit has been disassembled.
* When the print image density is low.
* When there is a blur on the print image.
* When there is unevenness in the print image density.
* The toner is excessively dispersed.
1)
* The developing unit has been disassembled.
* When the print image density is low.
* When there is a blur on the print image.
* When there is unevenness in the print image density.
* The toner is excessively dispersed.
1)
Remove the developing doctor cover, and place the develop-
ing unit on a flat surface.
ing unit on a flat surface.
2)
Attach a piece of string to a sewing needle or pin.
3)
Hold the thread and bring the needle near the developing
roller. (Do not use a paper clip because too heavy. It will not
provide a correct position.)
roller. (Do not use a paper clip because too heavy. It will not
provide a correct position.)
4)
Mark the developing roller surface on the extension line of the
needle with the needle at 2 - 3mm from the developing roller
surface. (Never touch the needle tip with the developing roller.)
needle with the needle at 2 - 3mm from the developing roller
surface. (Never touch the needle tip with the developing roller.)
5)
Measure the distance between the marking position and posi-
tion A of the developing unit frame, and check that it is 37.8
tion A of the developing unit frame, and check that it is 37.8
±
0.5mm.
If the distance is not within the above range, adjust the devel-
oping roller main pole position in the following procedures.
If the distance is not within the above range, adjust the devel-
oping roller main pole position in the following procedures.
6)
Remove the developing unit front cover, loosen the fixing
screw of the developing roller main pole adjustment plate, and
move the adjustment plate in the arrow direction to adjust.
screw of the developing roller main pole adjustment plate, and
move the adjustment plate in the arrow direction to adjust.
Repeat procedures 3) - 6) until the developing roller main pole
position comes to the specified range.
position comes to the specified range.
7)
After completion of the adjustment of the developing roller
main pole position, fix the developing roller main pole adjust-
ment plate with the fixing screw.
main pole position, fix the developing roller main pole adjust-
ment plate with the fixing screw.
ADJ 3
Toner density control reference
value setting
value setting
This adjustment is needed in the following situations:
* When developer is replaced.
* When developer is replaced.
NOTE: Be sure to execute this adjustment only when developer is
replaced. Never execute it in the other cases.
1)
With the front cabinet open, enter SIM25-2.
2)
Close the front cabinet.
3)
Select a developing unit to be adjusted.
2㨪3mm
A
37.8+0.5mm
37.8+0.5mm
EXECUTE
M
K
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MX-3100N ADJUSTMENTS 6 – 5
4)
When [EXECUTE] key is pressed, it is highlighted. The devel-
oping roller rotates, and the toner density sensor detects toner
density, and the output value is displayed.
The above operation is executed for 3 minutes, and the aver-
age value of the toner density sensor detection level is set
(saved) as the reference toner density control value.
When the reference toner density control adjustment operation
is completed, [EXECUTE] key returns to normal from highlight.
This makes known about whether the adjustment operation is
completed or not.
The above operation is executed each of the lower speed
mode and the middle speed mode, and the reference toner
density control value is set for each of them.
NOTE:
If the operation is interrupted within 3 minutes, the adjustment
result is not reflected.
When [EXECUTE] key is pressed during rotation, the opera-
tion is stopped and [EXECUTE] key returns to the normal dis-
play.
If [EE-EU], [EE-EL], or [EE-EG] is displayed, setting of the ref-
erence toner density control value is not completed normally.
oping roller rotates, and the toner density sensor detects toner
density, and the output value is displayed.
The above operation is executed for 3 minutes, and the aver-
age value of the toner density sensor detection level is set
(saved) as the reference toner density control value.
When the reference toner density control adjustment operation
is completed, [EXECUTE] key returns to normal from highlight.
This makes known about whether the adjustment operation is
completed or not.
The above operation is executed each of the lower speed
mode and the middle speed mode, and the reference toner
density control value is set for each of them.
NOTE:
If the operation is interrupted within 3 minutes, the adjustment
result is not reflected.
When [EXECUTE] key is pressed during rotation, the opera-
tion is stopped and [EXECUTE] key returns to the normal dis-
play.
If [EE-EU], [EE-EL], or [EE-EG] is displayed, setting of the ref-
erence toner density control value is not completed normally.
5)
Use SIM24-5 to clear the developer counter.
6)
Use SIM44-27 to clear the half-tone correction data.
NOTE:
1)
1)
When replacing developer, always replace all the three colors
of Yellow, Magenta, and Cyan.
If only one color is replaced, color balance may be adversely
affected. Black developer can be replaced individually.
of Yellow, Magenta, and Cyan.
If only one color is replaced, color balance may be adversely
affected. Black developer can be replaced individually.
2)
After replacement of developer or the photoconductor, be sure
to execute SIM44-27 to clear the half-tone correction data.
If the above procedure is neglected, the half-tone correction
may not be performed correctly.
to execute SIM44-27 to clear the half-tone correction data.
If the above procedure is neglected, the half-tone correction
may not be performed correctly.
3)
When not replacing the developer, do not execute SIM25-2.
ADJ 4
Adjusting high voltage values
4-A
Adjust the main charger grid voltage
This adjustment is needed in the following situations:
* When the MC/DV high voltage power PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
* When the MC/DV high voltage power PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Enter the SIM 8-2 mode.
2)
Select an output mode to be adjusted with the mode key and
the scroll key.
the scroll key.
3)
Enter the adjustment value (specified value) of the middle
speed mode and press [OK] key.
speed mode and press [OK] key.
Error
display
Error name
Detail of error
EE-EL
EL abnormality
Sensor output level: 1.5V or below. If not,
Control voltage: 8.0V or above.
Control voltage: 8.0V or above.
EE-EU
EU abnormality
Sensor output level: 3.45V or above. If not,
Control voltage: 2.0V or below.
Control voltage: 2.0V or below.
EE-EC
EC abnormality
Sensor output level: other than 2.5V
± 0.2V
EXECUTE
EXECUTE
or after 30 sec.
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Item
Mode
Adjustment
range
Monitor (MC/DV high
voltage PWB)
Actual
voltage
Monitor voltage
(Specified value)
Check
pin
MIDDLE
A
MIDDLE SPEED GB_K
K
Main charger grid voltage (Middle speed mode)
150 - 850
17.8
± 1.1V
GB-K
-630V
B
MIDDLE SPEED GB_C
C
Main charger grid voltage (Middle speed mode)
150 - 850
17.8
± 1.1V
GB-C
-630V
C
MIDDLE SPEED GB_M
M
Main charger grid voltage (Middle speed mode)
150 - 850
17.8
± 1.1V
GB-M
-630V
D
MIDDLE SPEED GB_Y
Y
Main charger grid voltage (Middle speed mode)
150 - 850
17.8
± 1.1V
GB-Y
-630V
LOW
A
LOW SPEED GB_K
K
Main charger grid voltage (Low speed mode)
150 - 850
17.7
± 1.1V
GB-K
-620V
B
LOW SPEED GB_C
C
Main charger grid voltage (Low speed mode)
150 - 850
17.7
± 1.1V
GB-C
-620V
C
LOW SPEED GB_M
M
Main charger grid voltage (Low speed mode)
150 - 850
17.7
± 1.1V
GB-M
-620V
D
LOW SPEED GB_Y
Y
Main charger grid voltage(Low speed mode)
150 - 850
17.7
± 1.1V
GB-Y
-620V
MX-3100N ADJUSTMENTS 6 – 6
Remark:
Normally when the default value is set, the specified voltage is out-
putted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
Normally when the default value is set, the specified voltage is out-
putted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
GBK:XXX GBC:XXX GBM:XXX GBY:XXX
When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.
To adjust all the modes individually, first adjust the middle speed
mode, and then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Use care for that.
Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If it must be checked that the normal voltage is outputted or if an
adjustment is required by referring to the output voltage, follow the
procedures below.
1)
When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.
To adjust all the modes individually, first adjust the middle speed
mode, and then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Use care for that.
Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If it must be checked that the normal voltage is outputted or if an
adjustment is required by referring to the output voltage, follow the
procedures below.
1)
Remove the rear cover of the machine.
2)
Open the PWB holder.
3)
Enter the SIM 8-2 mode.
4)
Select an output mode to be adjusted with the mode key and
the scroll key.
the scroll key.
5)
Check the relationship between the check pin on the MC/DV
high voltage PWB and each adjustment mode.
high voltage PWB and each adjustment mode.
6)
Apply a digital multi-meter to between the check pin and GND
on the MC/DV high voltage PWB corresponding to the
adjusted mode.
on the MC/DV high voltage PWB corresponding to the
adjusted mode.
7)
Press [EXECUTE] key.
The main charger grid voltage is outputted for 30sec.
If this procedure is executed for a long time, the OPC drum
and the developing roller may be adversely affected. Use this
procedure as short as possible.
If possible, it is recommendable to use an unnecessary devel-
oping unit and an unnecessary OPC drum for this adjustment.
The main charger grid voltage is outputted for 30sec.
If this procedure is executed for a long time, the OPC drum
and the developing roller may be adversely affected. Use this
procedure as short as possible.
If possible, it is recommendable to use an unnecessary devel-
oping unit and an unnecessary OPC drum for this adjustment.
8)
Check the monitor voltage with the digital multi-meter.
If the monitor voltage is not in the range of the specified values
shown in the table above, change the adjustment value and
adjust. If the specified value voltage is not obtained even
though the adjustment value is changed, the following parts
may be defective.
• MC/DV high voltage PWB
• PCU PWB
• Development unit
• OPC drum unit
• High voltage circuit electrode
If the monitor voltage is not in the range of the specified values
shown in the table above, change the adjustment value and
adjust. If the specified value voltage is not obtained even
though the adjustment value is changed, the following parts
may be defective.
• MC/DV high voltage PWB
• PCU PWB
• Development unit
• OPC drum unit
• High voltage circuit electrode
1
2
MX-3100N ADJUSTMENTS 6 – 7
4-B
Adjust the developing bias voltage
This adjustment is needed in the following situations:
* When the MC/DV high voltage power PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* When the MC/DV high voltage power PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Go through the modes specified in Simulation 8-1.
2)
Select an output mode to be adjusted with the mode key and
the scroll key.
the scroll key.
3)
Enter the adjustment value (specified value) of the middle
speed mode and press [OK] key.
speed mode and press [OK] key.
EXECUTE
EXECUTE
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Item
Mode
Adjustment
range
Monitor (MC/DV high
voltage PWB)
Actual
voltage
Monitor voltage
(Specified value)
Check
pin
MIDDLE
A
MIDDLE SPEED DVB_K
K
Developing bias voltage (Middle speed mode)
0-600
19.2
± 1.2V
BS-K
-450V
B
MIDDLE SPEED DVB_C
C
Developing bias voltage (Middle speed mode)
0-600
19.2
± 1.2V
BS-C
-450V
C
MIDDLE SPEED
DVB_M
DVB_M
M
Developing bias voltage (Middle speed mode)
0-600
19.2
± 1.2V
BS-M
-450V
D
MIDDLE SPEED DVB_Y
Y
Developing bias voltage (Middle speed mode)
0-600
19.2
± 1.2V
BS-Y
-450V
LOW
A
LOW SPEED DVB_K
K
Developing bias voltage (Low speed mode)
0-600
19.2
± 1.2V
BS-K
-450V
B
LOW SPEED DVB_C
C
Developing bias voltage (Low speed mode)
0-600
19.2
± 1.2V
BS-C
-450V
C
LOW SPEED DVB_M
M
Developing bias voltage (Low speed mode)
0-600
19.2
± 1.2V
BS-M
-450V
D
LOW SPEED DVB_Y
Y
Developing bias voltage (Low speed mode)
0-600
19.2
± 1.2V
BS-Y
-450V
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