Changing Grid Voltage Adjustment - Minolta Di551 Service Manual

ADJUSTMENT
1. Charging main manual adjustment
Charging main manual adjustment is inhibited in
the field.
2. Transfer manual adjustment
Default setting value must be set under the guid-
ance of Minolta Technical Support Center.
3. Separation (AC) manual adjustment
Default setting value must be set under the guid-
ance of Minolta Technical Support Center.
4. Separation (DC) manual adjustment
Default setting value must be set under the guid-
ance of Minolta Technical Support Center.
5. Charging grid manual adjustment
See [3] "Charging Grid Voltage Adjustment".
6. Developing bias manual adjustment
Default setting value must be set under the guid-
ance of Minolta Technical Support Center.
7. Transfer guide confirm
Transfer guide confirm is inhibited in the field.
8. TGR manual adjustment
TGR manual adjustment is inhibited in the field.
[3] Charging Grid Voltage Adjustment
Adjusting the charging grid voltage. Before per-
forming this adjustment, Check that the drum
counter was reset.
Step
Check the adjustment value of the charging
1
grid voltage on the durm flange.
Connect the V tester as shown below.
+: Grid pin
2
-: GND (Earth)
Range: DC1000 V
Enter the 36 mode.
3
[Adjustment mode menu Screen]
4
Press " Process adjustment".
1
[Process adjustment mode menu
Screen]
5
Press " High voltage adjustment".
1
[High voltage adjustment mode menu
Screen]
6
Press " HV adj. (Charging grid volt-
5
age)".
[HV adjustment (Charging grid voltage)
Screen]
7
Press START button , and check the volt-
age shown, then press CANCEL button.
Operation
When the voltage measured is not satisfac-
tory, change the data using the numeric
8
keys on the screen and press the
key.
Turn the SW2 (sub power) OFF.
9
Standard value: Specified value on the drum
Range of input: 0 to 255
1 step:
Metal frame
2-50
SET
flange ±5 V
1.6 V
+
Grid