Sharp MX-M950 / MX-MM1100 (serv.man37) Service Manual ▷ View online
MX-M1100 ADJUSTMENTS 6 – 5
1-C
Transfer current adjustment
This adjustment is needed in the following situations:
* The high voltage MAIN PWB has been replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* The high voltage MAIN PWB has been replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Enter the Sim. 8-6 mode.
2)
Select the output mode to be adjusted with the scroll button.
3)
Enter the adjustment value with 10-key, and press [OK] button.
The adjustment value is set.
Normally when the default value is set, the specified voltage is
outputted.
When [EXECUTE] button is pressed, the adjustment value is
saved and the transfer voltage is outputted simultaneously.
Since the actual output cannot be checked, if it is presumed to
be abnormal even though the adjustment value is set to the
default value, replace the high voltage main PWB.
The adjustment value is set.
Normally when the default value is set, the specified voltage is
outputted.
When [EXECUTE] button is pressed, the adjustment value is
saved and the transfer voltage is outputted simultaneously.
Since the actual output cannot be checked, if it is presumed to
be abnormal even though the adjustment value is set to the
default value, replace the high voltage main PWB.
1-D
Transfer cleaning voltage adjustment
This adjustment is needed in the following situations:
* The high voltage MAIN PWB has been replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* The high voltage MAIN PWB has been replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Enter the Sim. 8-17 mode.
2)
Select the output mode to be adjusted with the scroll button.
A㧦400
㧧
THV+(FACE)
B㧦400
㧧
THV+(BACK)
0
A:
SIMULATION NO.08㧙06
THV SETTING AND OUTPUT
400
㨇
0 㨪 800㨉
OK
TEST
CLOSE
EXECUTE
Item/Display
Description of item
Setting range
Default
Actual output current
85-sheet
model
95/110-sheet
model
85-sheet
model
95/110-sheet
model
A
THV+ (FACE)
THV (Transfer) output
Front surface mode
0-800
300
400
30
± 1μA
40
± 1μA
B
THV+ (BACK)
Back surface mode
0-800
350
400
35
± 1μA
40
± 1μA
A㧦450
㧧
THVAC(FACE)
B㧦450
㧧
THVAC(BACK)
C㧦 10
㧧
THV́
0
A:
SIMULATION NO.08㧙17
THVAC SETTING AND OUTPUT
450
㨇
0 㨪 600㨉
OK
TEST
CLOSE
EXECUTE
A㧦450
㧧
THVAC(FACE)
B㧦450
㧧
THVAC(BACK)
C㧦 60
㧧
THV́
0
A:
SIMULATION NO.08㧙17
THVAC SETTING AND OUTPUT
450
㨇
0 㨪 600㨉
OK
TEST
CLOSE
EXECUTE
Item/Display
Description of item
Setting range
Default
Actual output voltage
85-sheet
model
95/110-sheet
model
85-sheet
model
95/110-sheet
model
A
THVAC (FACE)
THVAC output (AC)
Front surface mode
0-600
450
AC4.5kV (p–p)
B
THVAC (BACK)
Back surface mode
0-600
450
AC4.5kV (p–p)
C
THV-
THV-output (DC bias)
0-75
40
60
DC -400V
AC 4.5kV (p–p)
DC -600V
AC 4.5kV (p–p)
MX-M1100 ADJUSTMENTS 6 – 6
3)
Enter the adjustment value with 10-key, and press [OK] button.
The adjustment value is set.
Normally when the default value is set, the specified voltage is
outputted.
When [EXECUTE] button is pressed, the adjustment value has
saved and the transfer cleaning voltage is outputted.
The three items of this adjustment are of the AC component
and the DC component of the transfer belt cleaning mode volt-
age applied to the transfer roller, and the actual output voltage
cannot be checked.
Therefore, if the voltage is presumed to be abnormal even
though the adjustment value is set to the default value, replace
the high voltage main PWB.
The adjustment value is set.
Normally when the default value is set, the specified voltage is
outputted.
When [EXECUTE] button is pressed, the adjustment value has
saved and the transfer cleaning voltage is outputted.
The three items of this adjustment are of the AC component
and the DC component of the transfer belt cleaning mode volt-
age applied to the transfer roller, and the actual output voltage
cannot be checked.
Therefore, if the voltage is presumed to be abnormal even
though the adjustment value is set to the default value, replace
the high voltage main PWB.
1-E
Transfer cleaning brush voltage adjustment
This adjustment is needed in the following situations:
* The high voltage SUB PWB has been replaced..
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
* The high voltage SUB PWB has been replaced..
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Enter the Sim.8-18 mode.
2)
Select the output mode to be adjusted with the scroll button.
3)
Enter the adjustment value with 10-key, and press [OK] button.
The adjustment value is set.
Normally when the default value is set, the specified voltage is
outputted.
When [EXECUTE] button is pressed, the adjustment value is
saved and the transfer cleaning brush voltage is outputted
simultaneously.
The adjustment value is set.
Normally when the default value is set, the specified voltage is
outputted.
When [EXECUTE] button is pressed, the adjustment value is
saved and the transfer cleaning brush voltage is outputted
simultaneously.
Use the following procedures to check whether the normal voltage
is actually outputted or to perform the adjustment while checking
the output voltage.
1)
is actually outputted or to perform the adjustment while checking
the output voltage.
1)
Remove the upper rear cover of the machine.
2)
Attach a digital multi-meter between the connector CN2 pin (a)
on the high voltage sub PWB and GND.
on the high voltage sub PWB and GND.
3)
Enter the adjustment value with 10-key, and press [EXECUTE]
key.
The transfer cleaning brush voltage is outputted for 30 sec.
key.
The transfer cleaning brush voltage is outputted for 30 sec.
4)
Check the output voltage with the digital multi-meter.
If the output voltage is not in the range specified in the above
table, repeat the procedures 2 thru 4 until it is in the specified
range.
If the output voltage is not in the range specified in the above
table, repeat the procedures 2 thru 4 until it is in the specified
range.
A㧦 23
㧧
THVCL+
B㧦 50
㧧
THVCĹ
0
A:
SIMULATION NO.08㧙18
THVCL SETTING AND OUTPUT
23
㨇
0 㨪 150㨉
OK
TEST
CLOSE
EXECUTE
Item/Display
Description of item
Setting
range
Default
Monitor connector
Adjustment
voltage
Actual output
voltage
Connector
Pin No.
(Monitor voltage)
A
THVCL+
Output for the transfer belt cleaning
brush
brush
Print mode
10-150
23
CN2
1
0.36 – 0.49V
200
± 25V
B
THVCL-
Cleaning mode
30-150
50
CN2
1
1.01 – 1.14V
-500
± 25V
CN2
MX-M1100 ADJUSTMENTS 6 – 7
1-F
Photoconductor dark potential adjustment
This adjustment is needed in the following situations:
* When the photoconductor drum is replaced.
* When the front surface potential sensor is replaced.
* When the main charger unit is replaced.
* When the main high voltage PWB is replaced.
* When the photoconductor unit (process unit) is disassembled.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* Before executing the image adjustment
1)
* When the photoconductor drum is replaced.
* When the front surface potential sensor is replaced.
* When the main charger unit is replaced.
* When the main high voltage PWB is replaced.
* When the photoconductor unit (process unit) is disassembled.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* Before executing the image adjustment
1)
Enter the Sim.44-3 mode.
2)
Select the adjustment mode.
• INI DARK VO:
• INI DARK VO:
When the OPC drum is replaced, select this mode.
• DARK VO:
In the other cases, select this mode.
3)
Press [EXECUTE] key.
[EXECUTE] button is highlighted, and the OPC drum is rotated
to start the OPC drum dark potential adjustment operation.
After completion of the adjustment, [EXECUTE] button returns
to the normal display.
The main charger grid voltage is automatically corrected until
the OPC drum dark potential becomes the specified value.
[EXECUTE] button is highlighted, and the OPC drum is rotated
to start the OPC drum dark potential adjustment operation.
After completion of the adjustment, [EXECUTE] button returns
to the normal display.
The main charger grid voltage is automatically corrected until
the OPC drum dark potential becomes the specified value.
ADJ 2
Developing unit adjustment
2-A
Developing doctor gap adjustment
The check and the adjustment are required in the following cases:
* When the developing unit is disassembled.
* When the print image density is too low.
* When there is a thin spot on a print image.
* When the print image density is uneven.
* When there is abnormally much toner dispersion.
* When the developing unit is disassembled.
* When the print image density is too low.
* When there is a thin spot on a print image.
* When the print image density is uneven.
* When there is abnormally much toner dispersion.
1)
Remove the developing unit from the machine, and remove
the cover and the guide as shown in the figure below.
the cover and the guide as shown in the figure below.
0
SIMULATION NO.44̆03
TEST
DARK POTENTIAL ADJUSTMENT
EXECUTE
INI TUM AREA
8
:
INI HUM AREA
7
:
VGL K
LIFE COUNTER
0
:
TARGET VO
650
:
1/1
CLOSE
VO RESULT
650
:
INI DARK VO
DARK VO
GRID BIAS
750
:
INI VG1
0
:
INI VG2
0
:
VG ENV
0
:
VG LIFE
0
:
LIFE K
1
:
1
:
VGH K
1
:
LOW VO
0
:
HIGH VO
0
:
MX-M1100 ADJUSTMENTS 6 – 8
2)
Loosen the developing doctor blade fixing screw.
3)
Insert a thickness gauge of 0.42mm into the gap of 40mm -
70mm from the edge of the developing doctor blade.
70mm from the edge of the developing doctor blade.
4)
Push the developing doctor blade in the direction of the devel-
oping roller (arrow direction), and tighten the fixing screw of
the developing doctor blade. (Perform the similar procedure for
the front frame and the rear frame.)
oping roller (arrow direction), and tighten the fixing screw of
the developing doctor blade. (Perform the similar procedure for
the front frame and the rear frame.)
5)
Check to confirm that the doctor gap is in the range of 0.42
±
0.025mm at two positions in 40mm - 70mm from the both
sides of the developing doctor blade. When inserting the thick-
ness gauge, be sure not to scratch the developing doctor
blade and the developing roller.
ness gauge, be sure not to scratch the developing doctor
blade and the developing roller.
2-B
Developing roller main pole position
adjustment
adjustment
The check and the adjustment are required in the following cases:
* When the developing unit is disassembled.
* When the print image density is too low.
* When there is a thin spot on a print image.
* When the print image density is uneven.
* When there is abnormally much toner dispersion.
1)
* When the developing unit is disassembled.
* When the print image density is too low.
* When there is a thin spot on a print image.
* When the print image density is uneven.
* When there is abnormally much toner dispersion.
1)
Place the developing unit on a flat surface.
2)
Remove developer from the developing roller.
3)
Put a string on a needle or a pin. (Do not use a paper clip,
which cannot provide an accurate position.)
which cannot provide an accurate position.)
4)
Hold the string, and put the needle closer to the developing
roller.
roller.
5)
With the needle 2 - 3mm apart from the developing roller, mark
the intersect of the extended line and the developing roller sur-
face. (Do not bring the needle into contact with the developing
roller.)
the intersect of the extended line and the developing roller sur-
face. (Do not bring the needle into contact with the developing
roller.)
6)
Measure the height of the marking position, and check to con-
firm that it is 60.5
firm that it is 60.5
± 0.5mm.
If the height is not in the above range, adjust the developing
roller main pole position by the following procedure.
Loosen the fixing screw of the developing roller main pole
adjustment plate, and move the adjustment plate in the arrow
direction to make an adjustment.
roller main pole position by the following procedure.
Loosen the fixing screw of the developing roller main pole
adjustment plate, and move the adjustment plate in the arrow
direction to make an adjustment.
Repeat the procedures 4 thru 6 until the developing roller main
pole position is within the specified range.
After completion of the adjustment of the developing roller
main pole position, tighten the fixing screw of the developing
roller main pole adjustment plate.
pole position is within the specified range.
After completion of the adjustment of the developing roller
main pole position, tighten the fixing screw of the developing
roller main pole adjustment plate.
70mm
40mm
70mm
40mm
0.42 0.025mm
+
-
0.42 0.025mm
+
-
2 3mm
60.5 0.5mm
+
-
60.5 0.5mm
+
-
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