MX-6201N, MX-7001N (serv.man18). ADJUSTMENTS SECTION - Sharp Copying Equipment Service Manual (repair manual). Page 7

MX-7001N  ADJUSTMENTS  6 – 7

1)

Remove the screw, and remove the main unit rear cover.

2)

Open the PWB holder.

3)

Enter SIM8-2 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.

6)

Apply a digital multi-meter to the connector CNMON pin on the
MC/DV high voltage PWB corresponding to the adjusted
mode.

7)

Press [EXECUTE] key.
The main charger grid voltage is outputted for 30sec.
If this procedure is executed for a long time, the OPC drum
and the developing roller may be adversely affected. Use this
procedure as short as possible.
If possible, it is recommendable to use an unnecessary devel-
oping unit and an unnecessary OPC drum for this adjustment.

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

 

This adjustment must be executed in the following cases:
* When MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)

Enter SIM8-1 mode.

2)

Select an output mode to be adjusted with the mode key and
the scroll key.

3)

Enter the adjustment value (specified value) of the middle
speed mode and press [OK] key.

or after 30 sec.

10-key

A : 450

;

MIDDLE SPEED DVB_K

B : 450

;

MIDDLE SPEED DVB_C

C : 450

;

MIDDLE SPEED DVB_M

D : 450

;

MIDDLE SPEED DVB_Y

A:

SIMULATION NO.08-01

DV SETTING AND OUTPUT

XXX

0

700

OK

TEST

EXECUTE

EXECUTE

CLOSE

LOW/HIGH

MIDDLE

A : 500

;

MIDDLE SPEED DVB_K

B : 450

;

MIDDLE SPEED DVB_C

C : 450

;

MIDDLE SPEED DVB_M

D : 450

;

MIDDLE SPEED DVB_Y

A:

SIMULATION NO.08-01

DV SETTING AND OUTPUT

XXX

0

700

OK

TEST

EXECUTE

EXECUTE

CLOSE

LOW/HIGH

MIDDLE

MIDDLE

A

MIDDLE SPEED DVB_K

K

Developing bias voltage (Middle 
speed mode)

0 – 600

452

12.0 

± 0.36V

CNMON

7

–450V

B

MIDDLE SPEED DVB_C

C

Developing bias voltage (Middle 
speed mode)

0 – 600

454

12.0 

± 0.36V

CNMON

5

–450V

C

MIDDLE SPEED DVB_M

M

Developing bias voltage (Middle 
speed mode)

0 – 600

454

12.0 

± 0.36V

CNMON

3

–450V

D

MIDDLE SPEED DVB_Y

Y

Developing bias voltage (Middle 
speed mode)

0 – 600

454

12.0 

± 0.36V

CNMON

1

–450V

LOW/
HIGH

A

LOW SPEED DVB_K

K

Developing bias voltage (Low 
speed mode)

0 – 600

452

11.1 

± 0.33V

CNMON

7

–450V

B

LOW SPEED DVB_C

C

Developing bias voltage (Low 
speed mode)

0 – 600

454

11.1 

± 0.33V

CNMON

5

–450V

C

LOW SPEED DVB_M

M

Developing bias voltage (Low 
speed mode)

0 – 600

454

11.1 

± 0.33V

CNMON

3

–450V

D

LOW SPEED DVB_Y

Y

Developing bias voltage (Low 
speed mode)

0 – 600

454

11.1 

± 0.33V

CNMON

1

–450V

E

HIGH SPEED DVB_K

K

Developing bias voltage (High 
speed mode)

0 – 600

452

12.0 

± 0.36V

CNMON

7

–450V