AR-C260 (serv.man11). (8) Setting Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 3

AR-C260/C260M  SETTING AND ADJUSTMENTS  8 - 3

8) Press the [EXECUTE] key.

The main charger grid voltage is outputted for 30sec.

If this operation is performed for a long time, the OPC drum and
the developing roller may be damaged. Be careful to perform this
operation in a short time.

It is advisable to install an unnecessary developing unit and unnec-
essary OPC drums to the machine for this adjustment.

9) Check the monitor voltage with the digital multi-meter.

If the monitor voltage is not in the above specified range, change
the adjustment value and adjust again. If the specified voltage is
not obtained even by changing the adjustment value, the following
parts may be judged as defective.

High voltage PWB

PCU PWB

Developing unit

Photoconductor unit

High voltage circuit electrode

This adjustment must be performed in the following cases:

• When the high voltage power PWB is replaced.

• When a U2 trouble occurs.

• When the PCU PWB is replaced.

• When the EEPROM of the PCU PWB is replaced.

1) Enter the SIM 8-1 mode.

SIM 8-1

2) Select the output mode to be adjusted with the color key and the

scroll key.

3) Enter the adjustment value (specified value), and press the [OK]

key.

By entering the default value (specified value), the specified volt-
age is outputted.

Remark: When the default value is set, the specified voltage is output-

ted. 
There is, therefore, no need to check the output voltage
unless there is a doubt for any abnormality in the output volt-
age. 
If there is a need to check that the normal voltage is output-
ted or to adjust by referring to the output voltage, use the
method below.

1) Remove the rear cover of the machine. 

2) Remove the image process fan motor and the duct.

3) Connect the high voltage adjustment harnesses (DHAi-3471FCZZ/

DHAi-3472FCZZ) with the connectors CNMON and CNMONK on
the high voltage PWB.

4) Enter the SIM8-2 mode.

5) Select the output mode to be adjusted with the color key and the

scroll key.

6) Check that the pin numbers of the connectors CNMON and

CNMONK are properly assigned to the connector pin numbers of
the high voltage adjustment harness. 

Color

Item

Operation mode

Adjustment value

Developing bias voltage

Monitor (High voltage PWB)

Pin 

No.

Actual 

voltage

Adjustment 

range

Specified 

value 

(Default)

Monitor voltage 

(Specified value)

Connector

K

A: HIGH SPEED

High speed (140mm/s) (B & W)

180 – 700

315

7.43 ± 0.1V

CNMONK

3

–315v

B: MIDDLE SPEED

Middle speed (117mm/s) (Color) (B & W)

180 – 700

315

7.43 ± 0.1V

CNMONK

3

–315v

C: LOW SPEED

Low speed (58.5mm/s) (Color) (B & W) 
(Special paper)

180 – 700

285

6.45 ± 0.1V

CNMONK

3

–285v

C

A: MIDDLE SPEED

Middle speed (117mm/s) (Color) (B & W)

180 – 700

265

5.76 ± 0.1V

CNMON

1

–265v

B: LOW SPEED

Low speed (58.5mm/s) (Color) (B & W) 
(Special paper)

180 – 700

235

4.75 ± 0.1V

CNMON

1

–235v

M

A: MIDDLE SPEED

Middle speed (117mm/s) (Color) (B & W)

180 – 700

265

5.76 ± 0.1V

CNMON

5

–265v

B: LOW SPEED

Low speed (58.5mm/s) (Color) (B & W) 
(Special paper)

180 – 700

235

4.75 ± 0.1V

CNMON

5

–235v

Y

A: MIDDLE SPEED

Middle speed (117mm/s) (Color) (B & W)

180 – 700

240

4.75 ± 0.1V

CNMON

9

–240v

B: LOW SPEED

Low speed (58.5mm/s) (Color) (B & W) 
(Special paper)

180 – 700

210

3.78 ± 0.1V

CNMON

9

–210v

A

B