AR-161 (serv.man9). AR161 Service Manual-Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 5

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.

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) 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.

Mode

Specification

SIM

Developing bias voltage

DC-400

±

8V

SIM 8-1

VR31

Note:

•

Use a digital multi-meter with an internal resistance of
10M

Ω

 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.

Mode

Specification

SIM

Grid bias LOW

DC-400

±

20V

SIM 8-3

VR52

Grid bias HIGH

DC-525

±

10V

SIM 8-2

VR51

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

7 – 2