MX-C250 ADJUSTMENTS 5 – 2
3. Details of adjustment
ADJ 1 Adjusting high voltage values
1-A Adjust the main charger grid voltage
This adjustment is needed in the following situations:
* When the high voltage power PWB is replaced.
* U2 trouble has occurred.
1) Enter the SIM 8-2 mode.
2) Enter the adjustment value (specified value) in the middle
speed mode, and press [OK] key.
3) When [EXECUTE] key is pressed, the voltage entered in the
procedure 3 is outputted for 30sec and the set value is saved.
When [EXECUTE] key is pressed, the output is stopped.
Enter the adjustment value of each mode which is specified on
the label attached on the high voltage power PWB.
NOTE:
Note that the adjustment value may differ depending on the
high voltage power PWB.
Since the adjustment value label is attached on the high
voltage PWB, the PWB must be removed in order to check
the adjustment value.
This is a troublesome procedure. Therefore, it is advisable
to put down the adjustment value in advance.
GBK:XXX GBC:XXX GBM:XXX GBY:XXX
When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.
NOTE:
Since the high voltage output cannot be checked with a
digital multi meter in this model, a judgment of the output
must be made by checking the print image quality.
1-B Adjust the developing bias voltage
This adjustment is needed in the following situations:
* When the high voltage power PWB is replaced.
* U2 trouble has occurred.
1) Enter the SIM 8-1 mode..
2) Enter the adjustment value (specified value) in the middle
speed mode, and press [OK] key.
3) When [EXECUTE] key is pressed, the voltage entered in the
procedure 3 is outputted for 30sec and the set value is saved.
When [EXECUTE] key is pressed, the output is stopped.
Enter the adjustment value of each mode which is specified on
the label attached on the high voltage power PWB.
NOTE:
Note that the adjustment value may differ depending on the
high voltage power PWB.
Since the adjustment value label is attached on the high
voltage PWB, the PWB must be removed in order to check
the adjustment value.
This is a troublesome procedure. Therefore, it is advisable
to put down the adjustment value in advance.
ADJ10 Printer color balance/density adjustment 10-A Printer color balance adjustment (Manual adjustment) 67-25
10-B
Printer density adjustment (low density part density adjustment) (Normally
unnecessary to adjust)
67-36
10-C
Printer high density part density correction setting (high density part tone
gap countermeasure) (Normally unnecessary to the setting change)
67-34
ADJ 11 Fusing paper guide position adjustment
Job
No
Adjustment item list Simulation
Item/Display Content Setting range
1 M_GB_K K charging/grid bias set
value at middle speed
150 - 850
2 M_GB_C C charging/grid bias set
value at middle speed
150 - 850
3 M_GB_M M charging/grid bias set
value at middle speed
150 - 850
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