Sharp MX-5500N / MX-6200N / MX-7000N (serv.man45) Service Manual ▷ View online
MX-7000N ADJUSTMENTS 6 – 5
ADJ 5
Toner density control reference
value setting
value setting
This adjustment must be executed in the following cases:
* 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 cover (lower) open, enter SIM25-2.
2)
Close the front cover (lower).
3)
Select a developing unit to be adjusted.
4)
When [EXECUTE] key it pressed, it is highlighted. The devel-
oping roller rotates, and the toner 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 display return, to normal from
highlight. This makes you know whether the adjustment opera-
tion is completed or not.
The above operation is executed each of the lower speed
mode, the middle speed mode and the high 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
oping roller rotates, and the toner 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 display return, to normal from
highlight. This makes you know whether the adjustment opera-
tion is completed or not.
The above operation is executed each of the lower speed
mode, the middle speed mode and the high 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 (enabled).
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.
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.
ADJ 6
High voltage adjustments
6-A
Main charger grid voltage adjustment
This adjustment must be executed in the following cases:
* When the MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
* When the MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
EXECUTE
M
K
Adjustment completed
EXECUTE
Abnormal end
Y
C
AUTOMATIC DEVELOPER ADJUSTMENT
EXECUTE
TCD_K
45
:
1/1
SIMULATION NO.25-02
TEST
CLOSE
TCV_K
45
:
TCD_C
50
:
TCD_M
50
:
TCD_Y
45
:
TCV_C
50
:
TCV_M
50
:
TCV_Y
50
:
M
K
M
Y
C
K
AUTOMATIC DEVELOPER ADJUSTMENT
EXECUTE
AT DEVE ADJ_L_K
128
:
AT DEVEVO_L_Y
128
:
1/1
SIMULATION NO.25-02
TEST
CLOSE
AT DEVE ADJ_M_K
128
:
AT DEVE VO_M_Y
128
:
AT DEVE ADJ_L_C
128
:
AT DEVE VO_M_K
128
:
AT DEVE ADJ_L_M
128
:
AT DEVE VO_M_C
128
:
AT DEVE ADJ_L_Y
128
:
AT DEVE VO_M_M
128
:
AT DEVE ADJ_M_C
128
:
AT DEVE VO_H_K
128
:
AT DEVE ADJ_M_M
128
:
AT DEVE ADJ_M_Y
128
:
AT DEVE ADJ_H_K
128
:
AT DEVEVO_L_K
128
:
AT DEVEVO_L_M
128
:
AT DEVEVO_L_C
128
:
or process interrupt
Y
C
AUTOMATIC DEVELOPER ADJUSTMENT
EXECUTE
TCD_K
EE-EL
:
1/1
SIMULATION NO.25-02
TEST
CLOSE
TCV_K
:
TCD_C
50
:
TCD_M
EE-EL
:
TCD_Y
45
:
TCV_C
:
TCV_M
:
TCV_Y
:
M
K
M
Y
C
K
AUTOMATIC DEVELOPER ADJUSTMENT
EXECUTE
AT DEVE ADJ_L_K
185
:
AT DEVEVO_L_Y
128
:
1/1
SIMULATION NO.25-02
TEST
CLOSE
AT DEVE ADJ_M_K
185
:
AT DEVE VO_M_Y
128
:
AT DEVE ADJ_L_C
128
:
AT DEVE VO_M_K
185
:
AT DEVE ADJ_L_M
185
:
AT DEVE VO_M_C
128
:
:
AT DEVE ADJ_L_Y
128
:
AT DEVE VO_M_M
185
AT DEVE ADJ_M_C
128
:
AT DEVE VO_H_K
128
:
AT DEVE ADJ_M_M
185
:
AT DEVE ADJ_M_Y
128
:
AT DEVE ADJ_H_K
185
:
AT DEVEVO_L_K
185
:
AT DEVEVO_L_M
185
:
AT DEVEVO_L_C
128
:
Error
display
Error name
Detail of error
Remark
EE-EL
EL
abnormality
abnormality
(1) The sensor output level is less
than 0.5V in 1min after execution
of SIM25-02.
than 0.5V in 1min after execution
of SIM25-02.
When either
of (1) or (2)
is satisfied.
of (1) or (2)
is satisfied.
(2) The sensor output level is less
than 1.5V after the adjustment for
each speed or the control voltage
exceeds 8.0V.
than 1.5V after the adjustment for
each speed or the control voltage
exceeds 8.0V.
EE-EU
EU
abnormality
abnormality
(1) The sensor output level
exceeds 4.5V in 1min after
execution of SIM25-02.
exceeds 4.5V in 1min after
execution of SIM25-02.
When either
of (1) or (2)
is satisfied.
of (1) or (2)
is satisfied.
The sensor output level exceeds
3.45V after the adjustment for
each speed or the control voltage
is less than 2.0V.
3.45V after the adjustment for
each speed or the control voltage
is less than 2.0V.
EE-EC
EC
abnormality
abnormality
The sensor output level after the
adjustment for each speed is not
2.5V
adjustment for each speed is not
2.5V
± 0.2V.
MX-7000N ADJUSTMENTS 6 – 6
1)
Enter SIM8-2 mode.
2)
Select an output mode to be adjusted with the mode key and the scroll key.
3)
Enter the adjustment value (specified value) of the middle speed mode and press [OK] key.
Remark: By setting the default value, the specified voltage is
normally outputted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
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.
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.
or after 30 sec.
10-key
A : 583
;
MIDDLE SPEED GB_K
B : 635
;
MIDDLE SPEED GB_C
C : 635
;
MIDDLE SPEED GB_M
D : 635
;
MIDDLE SPEED GB_Y
A:
SIMULATION NO.08-02
DV SETTING AND OUTPUT
XXX
230
850
OK
TEST
EXECUTE
EXECUTE
CLOSE
LOW/HIGH
MIDDLE
A : 500
;
MIDDLE SPEED GB_K
B : 635
;
MIDDLE SPEED GB_C
C : 635
;
MIDDLE SPEED GB_M
D : 635
;
MIDDLE SPEED GB_Y
A:
SIMULATION NO.08-02
DV SETTING AND OUTPUT
XXX
230
850
OK
TEST
EXECUTE
EXECUTE
CLOSE
LOW/HIGH
MIDDLE
Item Mode
Adjustment value
Monitor (MC/DV high voltage PWB)
Actual
voltage
Adjustment
range
Default value
Monitor voltage
(Specified value)
Connector
Pin
No.
No.
MIDDLE
A
MIDDLE SPEED
GB_K
GB_K
K
Main charger grid voltage
(Middle speed mode)
(Middle speed mode)
230 – 850
583
54.1
± 1.62V
CNMON
8
–620V
B
MIDDLE SPEED
GB_C
GB_C
C Main charger grid voltage
(Middle speed mode)
230 – 850
635
55.5
± 1.67V
CNMON
6
–635V
C MIDDLE SPEED
GB_M
M Main charger grid voltage
(Middle speed mode)
230 – 850
635
55.5
± 1.67V
CNMON
4
–635V
D MIDDLE SPEED
GB_Y
Y
Main charger grid voltage
(Middle speed mode)
(Middle speed mode)
230 – 850
635
55.5
± 1.67V
CNMON
2
–635V
LOW/
HIGH
HIGH
A
LOW SPEED
GB_K
GB_K
K
Main charger grid voltage
(Low speed mode)
(Low speed mode)
230 – 850
552
50.9
± 1.53V
CNMON
8
–585V
B
LOW SPEED
GB_C
GB_C
C Main charger grid voltage
(Low speed mode)
230 – 850
600
52.3
± 1.57V
CNMON
6
–600V
C LOW SPEED
GB_M
M Main charger grid voltage
(Low speed mode)
230 – 850
600
52.3
± 1.57V
CNMON
4
–600V
D LOW SPEED
GB_Y
Y
Main charger grid voltage
(Low speed mode)
(Low speed mode)
230 – 850
600
52.3
± 1.57V
CNMON
2
–600V
E
HIGH SPEED
GB_K
GB_K
K
Main charger grid voltage
(High speed mode)
(High speed mode)
230 – 850
604 (70-sheets machine)
598 (62/55-sheets
machine)
60.5
± 1.82V
CNMON
8
–690V
MX-7000N ADJUSTMENTS 6 – 7
1)
Remove the screw, and remove the main unit rear cover.
2)
Open the PWB holder.
3)
Enter SIM8-2 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 pin No. of the connector
CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.
CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.
6)
Apply a digital multi-meter to the connector CNMON pin on the
MC/DV high voltage PWB corresponding to the adjusted
mode.
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 again. 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
Developing 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 again. 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
Developing unit
OPC drum unit
High voltage circuit electrode
6-B
Developing bias voltage adjustment
This adjustment must be executed in the following cases:
* When MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)
* When MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)
Enter SIM8-1 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.
1
2
or after 30 sec.
10-key
A : 450
;
MIDDLE SPEED DVB_K
B : 450
;
MIDDLE SPEED DVB_C
C : 450
;
MIDDLE SPEED DVB_M
D : 450
;
MIDDLE SPEED DVB_Y
A:
SIMULATION NO.08-01
DV SETTING AND OUTPUT
XXX
0
700
OK
TEST
EXECUTE
EXECUTE
CLOSE
LOW/HIGH
MIDDLE
A : 500
;
MIDDLE SPEED DVB_K
B : 450
;
MIDDLE SPEED DVB_C
C : 450
;
MIDDLE SPEED DVB_M
D : 450
;
MIDDLE SPEED DVB_Y
A:
SIMULATION NO.08-01
DV SETTING AND OUTPUT
XXX
0
700
OK
TEST
EXECUTE
EXECUTE
CLOSE
LOW/HIGH
MIDDLE
Item
Mode
Adjustment value
Monitor (MC/DV high voltage PWB)
Actual
voltage
Adjustment
range
Default
value
Monitor voltage
(Specified value)
Connector
Pin
No.
No.
MIDDLE
A
MIDDLE SPEED DVB_K
K
Developing bias voltage (Middle
speed mode)
speed mode)
0 – 700
450
12.0
± 0.36V
CNMON
7
–450V
B
MIDDLE SPEED DVB_C
C
Developing bias voltage (Middle
speed mode)
speed mode)
0 – 700
450
12.0
± 0.36V
CNMON
5
–450V
C
MIDDLE SPEED DVB_M
M
Developing bias voltage (Middle
speed mode)
speed mode)
0 – 700
450
12.0
± 0.36V
CNMON
3
–450V
D
MIDDLE SPEED DVB_Y
Y
Developing bias voltage (Middle
speed mode)
speed mode)
0 – 700
450
12.0
± 0.36V
CNMON
1
–450V
LOW/
HIGH
HIGH
A
LOW SPEED DVB_K
K
Developing bias voltage (Low
speed mode)
speed mode)
0 – 700
420
11.1
± 0.33V
CNMON
7
–420V
B
LOW SPEED DVB_C
C
Developing bias voltage (Low
speed mode)
speed mode)
0 – 700
420
11.1
± 0.33V
CNMON
5
–420V
C
LOW SPEED DVB_M
M
Developing bias voltage (Low
speed mode)
speed mode)
0 – 700
420
11.1
± 0.33V
CNMON
3
–420V
D
LOW SPEED DVB_Y
Y
Developing bias voltage (Low
speed mode)
speed mode)
0 – 700
420
11.1
± 0.33V
CNMON
1
–420V
E
HIGH SPEED DVB_K
K
Developing bias voltage (High
speed mode)
speed mode)
0 – 700
450
12.0
± 0.36V
CNMON
7
–450V
MX-7000N ADJUSTMENTS 6 – 8
Remark: By setting the default value, the specified voltage is
normally outputted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
attached to the MC/DV high voltage power PWB. Enter that value.
DVK:XXX DVC:XXX DVM:XXX DVY: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, 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, 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 screw, and remove the main unit rear cover.
2)
Open the PWB frame.
3)
Enter SIM8-1 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 pin No. of the connector
CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.
CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.
6)
Apply a digital multi-meter to the connector CNMON pin on the
MC/DV high voltage PWB corresponding to the adjusted
mode.
MC/DV high voltage PWB corresponding to the adjusted
mode.
7)
Press [EXECUTE] key.
The developing bias voltage is outputted for 30sec.
The developing bias voltage is outputted for 30sec.
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 again. 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
Developing 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 again. 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
Developing unit
OPC drum unit
High voltage circuit electrode
6-C
Transfer voltage adjustment
This adjustment must be executed in the following cases:
* When the TC high voltage power PWB is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)
* When the TC high voltage power PWB is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)
Enter SIM8-6 mode.
1
2
CNMON
1
or after 30 sec.
10-key
A : 78
;
TC1 LOW SPEED CL K
B : 78
;
TC1 MIDDLE SPEED CL K
C : 68
;
TC1 LOW SPEED CL C
D: 68
;
TC1 MIDDLE SPEED CL C
A:
SIMULATION NO.08-06
THV SETTING AND OUTPUT
XXX
0
255
OK
TEST
CLOSE
E : 68
;
TC1 LOW SPEED CL M
F : 68
;
TC1 MIDDLE SPEED CL M
G: 68
;
TC1 LOW SPEED CL Y
H: 68
;
TC1 MIDDLE SPEED CL Y
I : 78
;
TC1 LOW SPEED BW K
J : 78
;
TC1 MIDDLE SPEED BW K
K: 130
;
TC1 HIGH SPEED BW K
L : 132
;
TC2 PLAIN CL SPX
EXECUTE
EXECUTE
EXECUTE
A: 200
;
TC1 LOW SPEED CL K
B : 78
;
TC1 MIDDLE SPEED CL K
C : 68
;
TC1 LOW SPEED CL C
D: 68
;
TC1 MIDDLE SPEED CL C
A:
SIMULATION NO.08-06
THV SETTING AND OUTPUT
XXX
0
255
OK
TEST
CLOSE
E : 68
;
TC1 LOW SPEED CL M
F : 68
;
TC1 MIDDLE SPEED CL M
G: 68
;
TC1 LOW SPEED CL Y
H: 68
;
TC1 MIDDLE SPEED CL Y
I : 78
;
TC1 LOW SPEED BW K
J : 78
;
TC1 MIDDLE SPEED BW K
K: 130
;
TC1 HIGH SPEED BW K
L : 132
;
TC2 PLAIN CL SPX
EXECUTE
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