Transfer Voltage Adjustment - Sharp MX-2300 G Service Manual

: Dec. 15 2005
1
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.
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
1
6) Apply a digital multi-meter to the connector CNMON pin on the
MC/DV high voltage PWB corresponding to the adjusted
mode.
7) Press [EXECUTE] key.
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
Item Display
A TC1 LOW SPEED CL K
1
B TC1 MIDDLE SPEED CL K
C TC1 LOW SPEED CL CMY
D TC1 MIDDLE SPEED CL CMY
E TC1 LOW SPEED BW K
F TC1 MIDDLE SPEED BW K
G TC2 PLAIN CL SPX
H TC2 PLAIN CL DPX
I TC2 PLAIN BW SPX
J TC2 PLAIN BW DPX
K TC2 HEAVY1 CL SPX
L TC2 HEAVY1 BW SPX
M TC2 OHP CL
N TC2 OHP BW
O TC2 ENVELOPE CL
P TC2 ENVELOPE BW
Q TC2 CLEANING
R TC2 CLEAN LOW SPD
S TC2 CLEAN MIDDLE SPD
T TC2 CLEAN CLEANING
Content
Primary transfer COLOR
bias reference
value
CMY
BLACK
Secondary transfer COLOR Normal
bias reference paper
value
BLACK
COLOR
BLACK
COLOR
BLACK
COLOR
BLACK
Cleaning process
Secondary transfer Low speed print
cleaning bias
Middle speed print
reference value
Cleaning
MX-2300/2700 N/G ADJUSTMENTS 6 – 7
4-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) Enter SIM8-6 mode.
SIMULATION NO.08-06
TEST
THV SETTING AND OUTPUT
A xxx
A:
xxx
B xxx
C xxx
0 255
D xxx
10-key
EXECUTE
SIMULATION NO.08-06
TEST
THV SETTING AND OUTPUT
A xxx
A: xxx
B xxx
C xxx
0 255
D xxx
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 out-
putted.
Setting
range
K Low speed 0 to 255
Middle speed 0 to 255
Low speed 0 to 255
Middle speed 0 to 255
K Low speed 0 to 255
Middle speed 0 to 255
Front surface 51 to 255
Back surface 51 to 255
Front surface 51 to 255
Back surface 51 to 255
Heavy paper 51 to 255
51 to 255
OHP 51 to 255
51 to 255
Envelope 51 to 255
51 to 255
51 to 255
51 to 255
51 to 255
51 to 255
TC1 LOW SPEED CL K
TC1 MIDDLE SPEED CL K
TC1 LOW SPEED CL CMY
TC1 MIDDLE SPEED_CL CMY
EXECUTE
EXECUTE
or after 30 sec.
TC1 LOW SPEED CL K
TC1 MIDDLE SPEED CL K
TC1 LOW SPEED CL CMY
TC1 MIDDLE SPEED_CL CMY
EXECUTE
Default
Default Actual output
value setting range Actual
output value
232 –500V to 5000V
232 –500V to 5000V
139 –500V to 5000V
139 –500V to 5000V
232 –500V to 5000V
232 –500V to 5000V
100 2µA to 45µA 12.5µA
100 2µA to 45µA 12.5µA
90 2µA to 45µA
90 2µA to 45µA
69 2µA to 45µA
69 2µA to 45µA
60 2µA to 45µA
60 2µA to 45µA
184 2µA to 45µA
184 2µA to 45µA
79 2µA to 45µA
72 –50V to –1500
72 –50V to –1500V
156 –50V to –1500V
0
CLOSE
OK
0
CLOSE
OK
value
4500V
4500V
2500V
2500V
4500V
4500V
10µA
10µA
6µA
6µA
4µA
4µA
30µA
30µA
8µA
–200V
–200V
–800V