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5) Measure the distance from the marking position to the top of the
doctor plate of the developing unit to insure that it is 18mm.
If the distance is not within the specified range, loosen the fixing
screw A of the main pole adjustment plate, and move the adjust-
ment plate in the arrow direction to adjust.
(3) Developing bias voltage adjustment (SIM 8-1)
Note: • Use a digital multi-meter with an internal resistance of
10MΩ 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) Execute SIM 8-1. (The developing bias voltage is outputted for 30
sec.)
4) Adjust the adjustment volume VR31 so that the output voltage is
within the specified range shown below.
<Adjustment specification>
Mode Specification SIM
Developing bias voltage DC-400±8V SIM 8-1 VR31
(4) Grid bias voltage adjustment (SIM 8-2, SIM 8-3)
Note: • Use a digital multi-meter with an internal resistance of
10MΩ or more.
• First adjust the grid LOW output, then adjust the grid HIGH
voltage.
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) Execute SIM 8-3. (The grid bias voltage is outputted in the grid
bias LOW output mode for 30 sec.)
4) Adjust the adjustment volume VR52 so that the output voltage is
within the specified range shown below.
5) Execute SIM 8-2. (The grid bias voltage is outputted in the grid
bias HIGH output mode for 30 sec.)
6) Adjust the adjustment volume VR51 so that the output voltage is
within the specified range shown below.
<Adjustment specification>
Mode Specification SIM
Grid bias LOW DC-400±20V SIM 8-3 VR52
Grid bias HIGH DC-525±10V SIM 8-2 VR51
B. Mechanism section
(1) Image position adjustment (SIM 50-1/SIM 50-10)
a. Image lead edge position adjustment
1) Set a scale on the document table as shown below.
2) Make a copy.
3) Check the copy. If, necessary, perform the following adjustment
procedure.
4) Execute SIM 50-1. Set AE (Laser radiation timing)/Lead edge void
AR-161
AR-160/161 FM/E [7] ADJUSTMENT 11/27/1998
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