Sharp MX-M363N / MX-M363U / MX-M503N / MX-M503U (serv.man17) Service Manual ▷ View online
MX-M503N ADJUSTMENTS AND SETTINGS 4 – 5
2-B
Adjust the developing bias voltage
This adjustment is needed in the following situations:
* When the high voltage 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 high voltage PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Remove the rear cover of the machine.
2)
Enter the SIM 8-1 mode.
3)
Apply a digital multi-meter between the check pin 3 of the high
voltage PWB and the GND.
voltage PWB and the GND.
4)
Press [EXECUTE] key.
The main charger voltage is outputted for 30sec.
The main charger voltage is outputted for 30sec.
5)
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.
• High voltage PWB
• PCU PWB
• Developing unit
• High voltage circuit electrode
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.
• High voltage PWB
• PCU PWB
• Developing unit
• High voltage circuit electrode
2-C
Transfer current and voltage adjustment
This adjustment is needed in the following situations:
* When the high voltage 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 high voltage 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 8-6 mode.
1
2
EXECUTE
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Item/Display
Content
Adjustment value
(Monitor voltage)
Setting
range
Default
value
A
DVB_K
K developing
bias set value
bias set value
0.84
0.02V
0 - 700
496
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MX-M503N ADJUSTMENTS AND SETTINGS 4 – 6
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, the specified voltage is outputted.
When [EXECUTE] key is pressed, the transfer voltage is outputted.
By setting the default value, the specified voltage is outputted.
When [EXECUTE] key is pressed, the transfer voltage is outputted.
2-D
Transfer separation bias voltage
adjustment
adjustment
This adjustment is needed in the following situations:
* When the high voltage 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 high voltage 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 8-17 mode.
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, the specified voltage is outputted.
When [EXECUTE] key is pressed, the transfer separation bias
voltage is outputted.
key.
By setting the default value, the specified voltage is outputted.
When [EXECUTE] key is pressed, the transfer separation bias
voltage is outputted.
ADJ 3
Print engine image skew, image
position, image magnification
ratio, void area adjustments
(Manual adjustments)
position, image magnification
ratio, void area adjustments
(Manual adjustments)
3-A
Print engine image skew adjustment
(LSU parallelism adjustment)
(LSU parallelism adjustment)
This adjustment is needed in the following situations:
* When the LSU unit is replaced.
* When the LSU unit is removed from the main unit.
1)
* When the LSU unit is replaced.
* When the LSU unit is removed from the main unit.
1)
Enter the SIM 64-2 mode.
2)
Set the set items to the values shown below.
3)
Select the paper feed tray with A3 (11" x 17") paper in it by
changing the value of G.
changing the value of G.
4)
Press [EXECUTE] key.
The check pattern is printed out.
The check pattern is printed out.
5)
Check the printed image for any skew.
Measure the right angle level by using the printed cross pat-
tern.
There are following two methods of checking the image for any
skew (right angle).
Method 1:
Measure the maximum length of the diagonal lines of the rect-
angle print pattern. Check the difference in the length of the
diagonal lines for judgment of good or no good.
Method 2:
Compare the right angle of vertical side and the horizontal side
of the rectangle print pattern with the right angle of A3 or 11" x
8.5" paper for judgment of good or no good.
Measure the right angle level by using the printed cross pat-
tern.
There are following two methods of checking the image for any
skew (right angle).
Method 1:
Measure the maximum length of the diagonal lines of the rect-
angle print pattern. Check the difference in the length of the
diagonal lines for judgment of good or no good.
Method 2:
Compare the right angle of vertical side and the horizontal side
of the rectangle print pattern with the right angle of A3 or 11" x
8.5" paper for judgment of good or no good.
Item/Display
Content
Setting
range
Default value
28/36 PPM model
45/50 PPM model
A
TC PLAIN BW SPX
Transfer current
Black/
White
White
Standard paper mode
Front surface
0 - 255
113
129
B
TC PLAIN BW DPX
Back surface
0 - 255
113
129
C
TC HEAVY BW SPX
Heavy paper mode
Front surface
0 - 255
113
129
D
TC HEAVY BW DPX
Back surface
0 - 255
113
129
E
TC OHP BW
OHP mode
0 - 255
113
129
F
TC ENVELOPE BW
Envelope mode
0 - 255
113
129
G
TC CLEANING
Transfer cleaning
bias voltage
bias voltage
Cleaning in the normal operation mode
0 - 255
161
161
H
TC CLEANING PROCON
Cleaning in the process control mode
0 - 255
161
161
I
TC ADSORPTION
Transfer current between paper
0 - 255
113
129
Item/Display
Content
Setting
range
Default
value
A
PLV (FACE)
Separation bias output
(Front surface)
(Front surface)
0 - 255
170
B
PLV (BACK)
Separation bias output
(Back surface)
(Back surface)
0 - 255
170
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Item
Setting value
A
1
B
1
C
254
D
255
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MX-M503N ADJUSTMENTS AND SETTINGS 4 – 7
(NOTE)
In the case of Method 2, the right angle of paper to be used
may not be exact. Be sure to check the right angle of paper to
be used in advance.
In the case of Method 2, the right angle of paper to be used
may not be exact. Be sure to check the right angle of paper to
be used in advance.
(Method 1)
a) Measure the length of the diagonal lines of the rectangle
print pattern.
a) Measure the length of the diagonal lines of the rectangle
print pattern.
b) Calculate the difference between the measured lengths C
and D of the diagonal lines.
c) Check to insure that the difference between C and D is in
the following range. C – D =
and D of the diagonal lines.
c) Check to insure that the difference between C and D is in
the following range. C – D =
0.8mm
If the difference between C and D is in the above range, there
is no need to adjust.
is no need to adjust.
(Method 2)
a) Fit the side of A3 or 11" x 17" paper to the long side of the
rectangle print pattern.
a) Fit the side of A3 or 11" x 17" paper to the long side of the
rectangle print pattern.
b) Measure the shift distance between vertical side of paper
and side of the rectangle print pattern.
If the above distance is 0.5mm or less, there is no need to
adjust.
If not, execute the following procedures.
and side of the rectangle print pattern.
If the above distance is 0.5mm or less, there is no need to
adjust.
If not, execute the following procedures.
6)
Remove the left cover and the paper exit tray cabinet.
7)
When the LSU unit fixing screw is attached to the hole position
on the lower side, remove the fixing screw and attach it to the
hole on the upper side.
Loosen the fixing screw which is attached to the adjustment
hole position on the upper side. Loosen the LSU fixing screw
(left).
on the lower side, remove the fixing screw and attach it to the
hole on the upper side.
Loosen the fixing screw which is attached to the adjustment
hole position on the upper side. Loosen the LSU fixing screw
(left).
8)
Move the LSU front frame side up and down to adjust.
(When Method 1 is used to check the image for any skew
(right angle) in procedure 5 in advance)
When C > D (the lengths of the diagonal lines), the LSU is
shifted upward.
When C < D (the lengths of the diagonal lines), the LSU is
shifted downward.
(When Method 2 is used to check the image for any skew
(right angle) in procedure 5 in advance)
If the image is skewed in the arrow direction of A, to shift the
LSU upward. If the image is skewed in the arrow direction of B,
to shift the LSU downward.
(When Method 1 is used to check the image for any skew
(right angle) in procedure 5 in advance)
When C > D (the lengths of the diagonal lines), the LSU is
shifted upward.
When C < D (the lengths of the diagonal lines), the LSU is
shifted downward.
(When Method 2 is used to check the image for any skew
(right angle) in procedure 5 in advance)
If the image is skewed in the arrow direction of A, to shift the
LSU upward. If the image is skewed in the arrow direction of B,
to shift the LSU downward.
9)
Execute procedures 4) and 5).
(Repeat procedures 4), 5), 7) and 8) until a satisfactory result
is obtained.)
(Repeat procedures 4), 5), 7) and 8) until a satisfactory result
is obtained.)
10) When the adjustment result reaches a satisfactory level,
tighten the LSU unit fixing screws (at the left and at the center).
Diagonal line D
Diagonal line C
Direction B
Direction A
Comparison line
0.5mm or less
1
2
3
4
A
MX-M503N ADJUSTMENTS AND SETTINGS 4 – 8
3-B
Print engine image magnification ratio
adjustment (Main scanning direction)
adjustment (Main scanning direction)
This adjustment is needed in the following situations:
* When the LSU (writing) unit is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
* When the LSU (writing) unit 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 50-10 mode.
2)
Set A4 (11" x 8.5") paper in the paper feed tray.
3)
Select the paper feed tray set in procedure 2) with the scroll
key.
key.
4)
Press [EXECUTE] key.
The check pattern is printed out.
The check pattern is printed out.
5)
Check that the inside dimension of the printed half tone is 240
0.5mm.
0.5mm.
If the above requirement is not met, do the following steps.
6)
Change the set value of set item A.
When the set value is changed by 1, the dimension is changed
by 0.1mm.
When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.
When the set value is changed by 1, the dimension is changed
by 0.1mm.
When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.
Repeat procedures 2) - 6) until a satisfactory result is obtained.
3-C
Print engine print area (void area)
adjustment
adjustment
This adjustment is needed in the following situations:
* When the LSU is replaced or removed.
* When a paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual feed tray is replaced.
* When the manual feed tray is disassembled.
* When the duplex section is disassembled.
* When the duplex section is installed or replaced.
* When the large capacity paper feed tray is installed or replaced.
* When the large capacity paper feed tray section is disassembled.
* When the registration roller section is disassembled.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
(Note)
Before executing this adjustment, be sure to execute ADJ 3B print
engine image magnification ratio adjustment (Main scanning direc-
tion) in advance.
1)
* When the LSU is replaced or removed.
* When a paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual feed tray is replaced.
* When the manual feed tray is disassembled.
* When the duplex section is disassembled.
* When the duplex section is installed or replaced.
* When the large capacity paper feed tray is installed or replaced.
* When the large capacity paper feed tray section is disassembled.
* When the registration roller section is disassembled.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
(Note)
Before executing this adjustment, be sure to execute ADJ 3B print
engine image magnification ratio adjustment (Main scanning direc-
tion) in advance.
1)
Enter the SIM 50-10 mode.
2)
Set A4 (11" x 8.5") paper to all the trays, and select the set
item J with the scroll key. Enter the value corresponding to the
adjustment target paper feed tray.
item J with the scroll key. Enter the value corresponding to the
adjustment target paper feed tray.
3)
Press [EXECUTE] key.
The adjustment pattern is printed.
The adjustment pattern is printed.
EXECUTE
End of print
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