Sharp AR-M256 Service Manual page 57

8-12
Purpose Adjustment/Operation test/check
Used to check and adjust the operation of the main
Function
charger grid voltage (low mode) in each printer mode
(Purpose)
and the control circuit.
Image process
Section (Photoconductor/Developing/Transfer/Cleaning)
Photo conductor
Operation/procedure
1. Touch the exposure mode to be changed.
The current set value is highlighted.
2. Enter the set value with the 10-key.
3. Press the [START] key.
Output is made with the entered value for 30sec, and the display
returns to the original state.
Item
1 DENS1 (145) Density 1 (145mm/s)
2 DENS2 (145) Density 2 (145mm/s)
3 DENS3 (145) Density 3 (145mm/s)
4 DENS4 (145) Density 4 (145mm/s)
5 DENS5 (145) Density 5 (145mm/s)
6 TS (145) Toner save (145mm/s)
7 DENS1 (122) Density 1 (122mm/s)
8 DENS2 (122) Density 2 (122mm/s)
9 DENS3 (122) Density 3 (122mm/s)
10 DENS4 (122) Density 4 (122mm/s)
11 DENS5 (122) Density 5 (122mm/s)
12 TS (122) Toner save (122mm/s)
Min. unit: 25V increment
NO. Set value Grid High
1 6 –605V
2 6 –605V
3 6 –605V
4 7 –630V
5 8 –655V
6 4 –555V
7 5 –580V
8 5 –580V
9 5 –580V
10 6 –605V
11 7 –630V
12 3 –530V
*1. The negative value of the set value corresponds to the grid high
output voltage.
*2. The set values can be selected from the above 12 patterns only.
*3. The selected pattern determines the grid high voltage and the grid
low voltage.
If, for example, the grid high voltage is set to –605V (pattern 1), the
grid low voltage is –505V.
SIMULATION 8-12
Installa
Content tion Default
range
6
6
6
7
8
4
1-12
5
5
5
6
7
3
Grid Low
–505V
–505V
–505V
–630V
–555V
–455V
–455V
–455V
–455V
–480V
–505V
–405V
AR-M256/M257/M258/M316/M317/M318/5625/5631 SIMULATION 8 - 15
8-13
Purpose Adjustment/Operation test/check
Used to check and adjust the operation of the
Function
developing bias voltage in FAX mode and the control
(Purpose)
circuit.
Image process
Section (Photoconductor/Developing/Transfer/Cleaning)
Developer/Toner hopper
Operation/procedure
1. Enter the set value with the 10-key.
2. Press the [START] key.
Output is made with the entered value for 30sec. and the display
returns to the original state.
Setting range 200-650
Default 426
The minimum increment is 2V.
The result of (Set value-200) / 2 is stored in the EEPROM.
When reading a value from the EEPROM, the value of (EEP value ∗ 2
+200) is used as the set value.
Therefore, an even number must be entered. If not, the entered odd
number +1 is displayed after pressing [START] key.
SIMULATION 8-13
8-14
Purpose Adjustment/Operation test/check
Used to check and adjust the operation of the main
Function
charger grid voltage (high mode) in FAX mode and the
(Purpose)
control circuit.
Image process
(Photoconductor/Developing/Transfer/Cleaning)
Section
Photo conductor
Operation/procedure
1. Enter the set value with the 10-key.
2. Press the [START] key.
Output is made with the entered value for 30sec. and the display
returns to the original state.
Setting range 1-12
Default 5
NO. Set value Grid High
1 480 –480V
2 505 –505V
3 530 –530V
4 555 –555V
5 580 –580V
6 605 –605V
7 630 –630V
8 655 –655V
9 680 –680V
10 705 –705V
11 730 –730V
12 755 –755V
Min. unit: 25V increment
Grid Low
–380V
–405V
–430V
–455V
–480V
–505V
–530V
–555V
–580V
–605V
–630V
–655V