Sharp MX-M264N, Service Manual, Page: 39 / 256

MX-M264U ADJUSTMENTS AND SETTINGS 5 – 4
ADJ 2
Adjusting high voltage values
2-A Adjust the main charger grid voltage
This adjustment must be performed in the following cases:
* When the MC/DV high voltage power PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Enter the SIM 8-2 mode.
2) Select an output mode and an item to be adjusted.
3) Enter the main charger values of items A/B under TS_OFF/
ON.
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 again, the output is stopped.
CAUTION: Note that the adjustment value may differ depending on
the MC/DV high voltage power PWB.
Since the adjustment value label is attached on the MC/
DV high voltage PWB, the PWB must be removed in
order to check the adjustment value.
This is a troublesome procedure. Therefore, it is advis-
able to put down the adjustment value in advance.
When the adjustment value (specified value) of the mid-
dle speed mode is set, the adjustment values of the
other modes are automatically set according to the mid-
dle speed mode setting in a certain relationship.
CAUTION: Since the high voltage output cannot be checked with a
digital multi meter in this model, a judgment of the out-
put must be made by checking the print image quality.
2-B Adjust the developing bias voltage
This adjustment must be performed in the following cases:
* When the MC/DV high voltage power PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
1)
Enter the SIM 8-1 mode.
Button Item Display Content
Setting
range
Default
value
TS_OFF A COPY
GB Charging/grid bias set
value in a copy job
(Toner save mode
OFF) 0 - 750 590
B PRINTER
FAX
GB Charging/grid bias set
value in a Print/FAX
job (Toner save mode
OFF) 0 - 750 590
TS_ON A COPY
GB Charging/grid bias set
value in a copy job
(Toner save mode
ON) 0 - 750 460
B PRINTER
GB Charging/grid bias set
value in a print job
(Toner save mode
ON) 0 - 750 390
EXECUTE
EXECUTE
or after 30 sec.
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10-key
EXECUTE
EXECUTE
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2. (;(&87( 76B21 76B2))
or after 30 sec.
10-key