Sharp MX-5500N / MX-6200N / MX-7000N (serv.man45) Service Manual ▷ View online
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
MX-7000N ADJUSTMENTS 6 – 9
2)
Select a mode to be adjusted with the scroll key.
3)
Enter an adjustment value (specified value) and press [OK] key.
By setting the default value (specified value), the specified voltage is outputted.
When [EXECUTE] key is pressed, the transfer voltage is outputted.
By setting the default value (specified value), the specified voltage is outputted.
When [EXECUTE] key is pressed, the transfer voltage is outputted.
ADJ 7
Image density sensor, image
registration sensor adjustment
registration sensor adjustment
There are some assembly variations in the image density sensor
section. Therefore, the absolute detection level differs in each
machine. To correct this, calibration is executed.
This adjustment must be executed in the following cases:
* When the image density sensor is replaced.
* When the image resist sensor is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
The targets of the adjustment are the color image density sensor,
the black image density sensor, and the image registration sensor.
There are following adjustment methods.
* Color image density sensor adjustment (Calibration with the
section. Therefore, the absolute detection level differs in each
machine. To correct this, calibration is executed.
This adjustment must be executed in the following cases:
* When the image density sensor is replaced.
* When the image resist sensor is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
The targets of the adjustment are the color image density sensor,
the black image density sensor, and the image registration sensor.
There are following adjustment methods.
* Color image density sensor adjustment (Calibration with the
adjustment jig) SIM44-13
* Color/black image density sensor and the image registration sen-
sor adjustment SIM44-2
NOTE:
Before executing this adjustment, check to confirm the following
items.
* Check to confirm that the color image density sensor, the black
Before executing this adjustment, check to confirm the following
items.
* Check to confirm that the color image density sensor, the black
image density sensor, and the image registration sensor are
clean.
clean.
* Check to confirm that the image density sensor calibration plate
is clean.
* Check to confirm that the transfer belt is clean and free from
scratches.
Item
Display
Content
Set
range
Default
value
Actual output
setting range
Actual output
value of the
initial value
A
TC1 LOW SPEED CL K
Primary
transfer bias
reference value
transfer bias
reference value
Color
K
Lower speed
0 - 255
78
2
µA - 100µA
15
µA
B
TC1 MIDDLE SPEED CL K
Middle speed
0 - 255
78
2
µA - 100µA
15
µA
C
TC1 LOW SPEED CL C
C
Lower speed
0 - 255
68
2
µA - 100µA
10
µA
D
TC1 MIDDLE SPEED CL C
Middle speed
0 - 255
68
2
µA - 100µA
10
µA
E
TC1 LOW SPEED CL M
M
Lower speed
0 - 255
68
2
µA - 100µA
10
µA
F
TC1 MIDDLE SPEED CL M
Middle speed
0 - 255
68
2
µA - 100µA
10
µA
G
TC1 LOW SPEED CL Y
Y
Lower speed
0 - 255
68
2
µA - 100µA
10
µA
H
TC1 MIDDLE SPEED CL Y
Middle speed
0 - 255
68
2
µA - 100µA
10
µA
I
TC1 LOW SPEED BW K
Black and white
K
Lower speed
0 - 255
78
2
µA - 100µA
15
µA
J
TC1 MIDDLE SPEED BW K
Middle speed
0 - 255
78
2
µA - 100µA
15
µA
K
TC1 HIGH SPEED BW K
High speed
0 - 255
130
2
µA - 100µA
40
µA
L
TC2 PLAIN CL SPX
Secondary
transfer bias
reference value
transfer bias
reference value
Color
Normal
paper
paper
Front surface
51 - 255
132
2
µA - 60µA
25
µA
M
TC2 PLAIN CL DPX
Back surface
51 - 255
132
2
µA - 60µA
25
µA
N
TC2 PLAIN BW SPX
Black and white
Front surface
51 - 255
184
2
µA - 60µA
40
µA
O
TC2 PLAIN BW DPX
Back surface
51 - 255
184
2
µA - 60µA
40
µA
P
TC2 HEAVY CL SPX
Color
Heavy
paper
paper
Front surface
51 - 255
88
2
µA - 60µA
12.5
µA
Q
TC2 HEAVY CL DPX
Back surface
51 - 255
88
2
µA - 60µA
12.5
µA
R
TC2 HEAVY BW SPX
Black and white
Front surface
51 - 255
79
2
µA - 60µA
10
µA
S
TC2 HEAVY BW DPX
Back surface
51 - 255
79
2
µA - 60µA
10
µA
T
TC2 OHP CL
Color
OHP
51 - 255
72
2
µA - 60µA
8
µA
U
TC2 OHP BW
Black and white
51 - 255
72
2
µA - 60µA
8
µA
V
TC2 ENVELOPE CL
Color
Envelope
51 - 255
149
2
µA - 60µA
30
µA
W
TC2 ENVELOPE BW
Black and white
51 - 255
149
2
µA - 60µA
30
µA
X
TC2 CLEANING
Cleaning process
51 - 255
72
2
µA - 60µA
8
µA
Y
TC2 CLEAN LOW SPD
Secondary
transfer
cleaning bias
reference value
transfer
cleaning bias
reference value
Printing at low speed
51 - 255
72
–50V - –1500V
–200V
Z
TC2 CLEAN MIDDLE SPD
Printing at middle speed
51 - 255
100
–50V - –1500V
–400V
AA
TC2 CLEAN HIGH SPD
Printing at high speed
51 - 255
114
–50V - –1500V
–500V
AB
TC2 CLEAN CLEANING
Cleaning
51 - 255
156
–50V - –1500V
–800V
AC
PTC LOW SPEED CL
PTC current
reference value
reference value
Color
Lower speed
0 - 255
119
0/–100
µA - –700µA
–300
µA
AD
PTC MIDDLE SPEED CL
Middle speed
0 - 255
119
0/–100
µA - –700µA
–300
µA
AE
PTC LOW SPEED BK
Black and white
Lower speed
0 - 255
119
0/–100
µA - –700µA
–300
µA
AF
PTC MIDDLE SPEED BK
Middle speed
0 - 255
119
0/–100
µA - –700µA
–300
µA
AG
PTC HIGH SPEED BK
High speed
0 - 255
119
0/–100
µA - –700µA
–300
µA
AH
VCASE LOW SPEED CL
PTC case
voltage
reference value
voltage
reference value
Color
Lower speed
0 - 255
0
0/–200V - –1000V
0
AI
VCASE MIDDLE SPEED CL
Middle speed
0 - 255
0
0/–200V - –1000V
0
AJ
VCASE LOW SPEED BK
Black and white
Lower speed
0 - 255
0
0/–200V - –1000V
0
AK
VCASE MIDDLE SPEED BK
Middle speed
0 - 255
0
0/–200V - –1000V
0
AL
VCASE HIGH SPEED BK
High speed
0 - 255
0
0/–200V - –1000V
0
MX-7000N ADJUSTMENTS 6 – 10
7-A
Color image density sensor calibration
1)
Open the front cover (lower).
2)
Turn to the transfer belt tension release cam and release the
primary transfer belt tension.
primary transfer belt tension.
NOTE:
When the transfer belt tension of the primary transfer unit is
released manually, turn on the power again after completion of
the work. (Power OFF-ON) This procedure initializes the trans-
fer roller to return it to the home position.
When the transfer belt tension of the primary transfer unit is
released manually, turn on the power again after completion of
the work. (Power OFF-ON) This procedure initializes the trans-
fer roller to return it to the home position.
3)
Open the right cover unit (secondary transfer unit section).
4)
Open the process front cover, loosen the screw, and pull out
the primary transfer belt unit.
the primary transfer belt unit.
5)
Remove the developing unit (BK) and the OPC drum unit (BK).
6)
Install the image density sensor calibration jig (UKOG-
0318FCZZ) to the sensor housing section.
Engage the pawl (A) in the sensor housing groove, and slide it
to the rear frame side.
0318FCZZ) to the sensor housing section.
Engage the pawl (A) in the sensor housing groove, and slide it
to the rear frame side.
7)
Turn on the power and enter SIM44-13 mode.
8)
Close the right cover unit (secondary transfer unit section).
9)
Close the front cover (lower).
10) Press [EXECUTE] key.
Color image sensor calibration is automatically executed.
When the operation is completed, the adjustment result is dis-
played and [EXECUTE] key returns to the normal display.
When the operation is completed, the adjustment result is dis-
played and [EXECUTE] key returns to the normal display.
If the adjustment is not completed normally, "ERROR" is displayed.
In that case, check the following sections for any abnormality. If any
abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* PCU PWB
* Image sensor calibration jig (standard reflection sheet dirt,
In that case, check the following sections for any abnormality. If any
abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* PCU PWB
* Image sensor calibration jig (standard reflection sheet dirt,
scratch, discoloration)
NOTE: Store the image sensor calibration jig under low tempera-
ture, low humidity and dark place.
A
A
Display/Item
Content
Adjustment
value range
value range
Default
value
A
PCS_CL
CARB OUT
CARB OUT
Color image density sensor
LED current adjustment
target value
LED current adjustment
target value
1 – 255
108
B
PCS_CL
DARK
DARK
Color image density sensor
dark-voltage level
dark-voltage level
0 – 255
0
C
PCS_CL
LED ADJ
LED ADJ
Color image density sensor
LED current adjustment
target value (PCS CL CARB
OUT) registered LED current
level
LED current adjustment
target value (PCS CL CARB
OUT) registered LED current
level
1 – 255
21
or when the color sensor
adjustment is completed
SIMULATION NO.44-13
TEST
PATCH SEAL ADJUSTMENT
EXECUTE
PCS CL CARB OUT
108
:
PCS CL DARK
0
:
PCS CL LED ADJ
21
:
1/1
CLOSE
SIMULATION NO.44-13
TEST
PATCH SEAL ADJUSTMENT
EXECUTE
PCS CL CARB OUT
108
:
PCS CL DARK
0
:
PCS CL LED ADJ
21
:
1/1
CLOSE
EXECUTE
EXECUTE
OK
MX-7000N ADJUSTMENTS 6 – 11
7-B
Color image density sensor, black image
density sensor, image registration sensor
adjustment
density sensor, image registration sensor
adjustment
1)
Enter SIM44-2 mode.
2)
Press [EXECUTE] key.
The color image density sensor, the black image density sen-
sor, and the image registration sensor are automatically
adjusted.
After completion of the adjustment, the adjustment result is
displayed and [EXECUTE] key returns to the normal display.
The color image density sensor, the black image density sen-
sor, and the image registration sensor are automatically
adjusted.
After completion of the adjustment, the adjustment result is
displayed and [EXECUTE] key returns to the normal display.
If the adjustment is not completed normally, "ERROR" is dis-
played.
In that case, check the following sections for any abnormality.
If any abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* Black image density sensor
* Image registration sensor
* PCU PWB
* Transfer belt (dirt, scratch)
* Transfer belt cleaner
played.
In that case, check the following sections for any abnormality.
If any abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* Black image density sensor
* Image registration sensor
* PCU PWB
* Transfer belt (dirt, scratch)
* Transfer belt cleaner
PROCON GAIN ADJUSTMENT
EXECUTE
PCS_CL LED ADJ
21
:
PCS_K LED ADJ
21
:
1/2
SIMULATION NO.44-02
TEST
CLOSE
PCS_K BELT DIF
0
:
PCS_CL DARK
0
:
PCS_K DARK
0
:
PCS_K GRND
0
:
PCS_K BELT MAX
0
:
PCS_K BELT MIN
0
:
REG_F LED ADJ
27
:
REG_R LED ADJ
27
:
REG_F DARK
0
:
REG_R DARK
0
:
REG_F GRND
0
:
REG_R GRND
0
:
REG_F BELT MAX
0
:
REG_F BELT MIN
0
:
REG_F BELT DIF
0
:
REG_R BELT MAX
0
:
REG_R BELT MIN
0
:
REG_R BELT DIF
0
:
Display/Item
Content
Adjustment value range
Default value
PROCON
A
PCS_CL LED ADJ
Color image density sensor light emitting quantity adjustment value
1 – 255
21
B
PCS _K LED ADJ
Black image density sensor light emitting quantity adjustment value
1 – 255
21
C
PCS_CL DARK
Color image sensor dark voltage
0 – 255
0
D
PCS_K DARK
Black image density sensor dark voltage
0 – 255
0
E
PCS_K GRND
Belt base detection level when completion of Item B adjustment
0 – 255
0
F
PCS_K BELT MAX
Belt base detection level (Max.)
0 – 255
0
G
PCS_K BELT MIN
Belt base detection level (Min.)
0 – 255
0
H
PCS_K BELT DIF
Belt base detection level difference (Item E, Item F)
0 – 255
0
REGIST
I
REG_F LED ADJ
Image registration sensor light emitting quantity adjustment value F
1 – 255
27
J
REG_R LED ADJ
Image registration sensor light emitting quantity adjustment value R
1 – 255
27
K
REG_F DARK
Image registration sensor dark voltage F
0 – 255
0
L
REG_R DARK
Image registration sensor dark voltage R
0 – 255
0
M
REG_F GRND
Belt base detection level when completion of Item I adjustment
0 – 255
0
N
REG_R GRND
Belt base detection level when completion of Item J adjustment
0 – 256
0
O
REG_F BELTMAX
Belt base detection level (Max.) F
0 – 255
0
P
REG_F BELT MIN
Belt base detection level (Min.) F
0 – 255
0
Q
REG_F BELT DIF
Belt base detection level difference (Item O, Item P)
0 – 255
0
R
REG_R BELT MAX
Belt base detection level (Max.) R
0 – 255
0
S
REG_R BELT MIN
Belt base detection level (Min.) R
0 – 255
0
T
REG_R BELT DIF
Belt base detection level difference (Item R, Item S)
0 – 255
0
U
REG_F PATCH (K)
Patch detection level F (K)
0 – 255
0
V
REG_F PATCH (C)
Patch detection level F (C)
0 – 255
0
W
REG_F PATCH (M)
Patch detection level F (M)
0 – 255
0
X
REG_F PATCH (Y)
Patch detection level F (Y)
0 – 255
0
Y
REG_R PATCH (K)
Patch detection level R (K)
0 – 255
0
Z
REG_R PATCH (C)
Patch detection level R (C)
0 – 255
0
AA
REG_R PATCH (M)
Patch detection level R (M)
0 – 255
0
AB
REG_R PATCH (Y)
Patch detection level R (Y)
0 – 255
0
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