Read Sharp MX-1800N (serv.man14) Service Manual online
MX-1800N ADJUSTMENTS 6 – 7
2) Open the PWB frame.
3) Enter SIM8-1 mode.
4) Select an output mode to be adjusted with the mode key and
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.
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.
mode.
7) Touch [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
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
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)
* 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.
2)
Select a mode to be adjusted with the scroll key.
3)
Enter an adjustment value (specified value) and touch [OK]
key.
By setting the default value (specified value), the specified
voltage is outputted.
When [EXECUTE] key is touched, the transfer voltage is out-
putted.
key.
By setting the default value (specified value), the specified
voltage is outputted.
When [EXECUTE] key is touched, the transfer voltage is out-
putted.
CNMON
1
EXECUTE
EXECUTE
A:ġ
Aȇxxx
Bȇxxx
Cȇxxx
Ȉġ
TC1 LOW SPEEDġġCL K
Ȉġ
TC1 MIDDLE SPEED CL K
Ȉġ
TC1 LOW SPEED CL CMY
SIMULATIONġ NO.08-06
THV SETTING AND OUTPUT
xxx
0 255
OK
TEST
EXECUTE
0
Dȇxxx
Ȉ
TC1 MIDDLE SPEED_CL CMY
CLOSE
A:ġ
Aȇxxx
Bȇxxx
Cȇxxx
Ȉ
TC1 LOW SPEED CL K
Ȉ
TC1 MIDDLE SPEED CL K
Ȉ
TC1 LOW SPEED CLġ CMY
SIMULATIONġ NO.08-06
THV SETTING AND OUTPUT
xxx
ġ
0 255
OK
TEST
EXECUTE
0
Dȇxxx
Ȉ
TC1 MIDDLE SPEED_CL CMY
CLOSE
10-key
or after 30 sec.
Item
Display
Content
Setting
range
Default
value
Actual output
setting range
Default
value
Actual
output value
A
TC1 LOW SPEED CL K
Primary transfer
bias reference
value
bias reference
value
COLOR
K
Low speed
0 to 255
232
–500V to 5000V
4500V
B
TC1 MIDDLE SPEED CL K
Middle speed
0 to 255
232
–500V to 5000V
4500V
C
TC1 LOW SPEED CL CMY
CMY
Low speed
0 to 255
139
–500V to 5000V
2500V
D
TC1 MIDDLE SPEED CL CMY
Middle speed
0 to 255
139
–500V to 5000V
2500V
E
TC1 LOW SPEED BW K
BLACK
K
Low speed
0 to 255
232
–500V to 5000V
4500V
F
TC1 MIDDLE SPEED BW K
Middle speed
0 to 255
232
–500V to 5000V
4500V
G
TC2 PLAIN CL SPX
Secondary transfer
bias reference
value
bias reference
value
COLOR
Normal
paper
Front surface
51 to 255
100
2
µA to 45µA
12.5
µA
H
TC2 PLAIN CL DPX
Back surface
51 to 255
100
2
µA to 45µA
12.5
µA
I
TC2 PLAIN BW SPX
BLACK
Front surface
51 to 255
90
2
µA to 45µA
10
µA
J
TC2 PLAIN BW DPX
Back surface
51 to 255
90
2
µA to 45µA
10
µA
K
TC2 HEAVY1 CL SPX
COLOR
Heavy paper
51 to 255
69
2
µA to 45µA
6
µA
L
TC2 HEAVY1 BW SPX
BLACK
51 to 255
69
2
µA to 45µA
6
µA
M
TC2 OHP CL
COLOR
OHP
51 to 255
60
2
µA to 45µA
4
µA
N
TC2 OHP BW
BLACK
51 to 255
60
2
µA to 45µA
4
µA
O
TC2 ENVELOPE CL
COLOR
Envelope
51 to 255
184
2
µA to 45µA
30
µA
P
TC2 ENVELOPE BW
BLACK
51 to 255
184
2
µA to 45µA
30
µA
Q
TC2 CLEANING
Cleaning process
51 to 255
79
2
µA to 45µA
8
µA
R
TC2 CLEAN LOW SPD
Secondary transfer
cleaning bias
reference value
cleaning bias
reference value
Low speed print
51 to 255
72
–50V to –1500V
–200V
S
TC2 CLEAN MIDDLE SPD
Middle speed print
51 to 255
72
–50V to –1500V
–200V
T
TC2 CLEAN CLEANING
Cleaning
51 to 255
156
–50V to –1500V
–800V
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