Read Sharp AR-M160 (serv.man14) Service Manual online
AR-M205 ADJUSTMENT 6-2
(3)Developing bias voltage check
Note: Use a digital multi-meter with an internal resistance of 10M
Ω
or
more.
1) Set the digital multi-meter range to DC700V.
2) Put the test rod of the digital multi-meter on the developing bias
voltage output check pin.
3) Turn on the power, execute SIM25-1.
<Specification>
(4) Grid bias voltage check
Note: Use a digital multi-meter with an internal resistance of 10M
Ω
or
more.
1) Set the digital multi-meter range to DC700V.
2) Put the test rod of the digital multi-meter on the grid bias voltage
output check pin.
3) Turn on the power.
(The voltage is outputted in the grid bias High output mode during
warming up, and in the grid bias Low output mode when warming up
warming up, and in the grid bias Low output mode when warming up
is completed.)
<Specification>
B.Mechanism section
Note: If a jam error or paper empty occurs during copying in the
adjustment by the simulation, the image data are not saved, and
therefore recopying is required.
(1)Image position adjustment
a.OC image lead edge position adjustment (SIM 50-1)
Note: In advance to this adjustment, the sub scanning magnification ratio
adjustment must be performed.
1) Set a scale on the OC table as shown below.
2) Make a copy.
3) Check the copy output. If necessary, perform the following
adjustment procedures.
4) Execute SIM 50-1.
5) Set the OC lead edge position set value (Exposure display
<<PHOTO>> ON) to [1]
The OC image scanning start position is shifted inside the document
edge.
6) Set the main cassette lead edge void adjustment value (Exposure
display <<TEXT>> ON) * to [1]
The lead edge void becomes the minimum.
7) Set the main cassette print start position value (Exposure display
<<AUTO+MAIN CASSETTE LAMP>> ON) to [1] and make a copy.
The print start position is shifted inside the document edge.
8) Measure the image loss R of the copied image. Enter the set value of
the image scanning lead edge position (Exposure display
<<PHOTO>> ON) again.
•1 step of the set value corresponds to about 0.1mm shift.
•Calculate the set value from the formula below.
•Calculate the set value from the formula below.
R/0.1(mm) = Image loss set value
<R: Image loss measurement value (mm)>
Example:
4/0.1 = 40 = about 40
Note: If the set value is not obtained from the above formula, perform the
fine adjustment.
Mode
Specification
Developing bias voltage
DC - 400±8V
Mode
Specification
Grid bias LOW
DC - 400±8V
Grid bias HIGH
DC - 525±10V
5
10
5mm
4mm
*
The dimension varies depending on the model.
10
5mm
0mm
5
*
The scanning edge is set.
(A line may be printed by scanning the document edge.)
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