Sharp MXM654N

This adjustment is needed in the following situations:

• When the MC high voltage 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 the output mode to be adjusted with the scroll button.

   Item/Display (mode)			Content	Setting range	Actual voltage
   					65cpm machine	75cpm machine
   MID DLE	A	MIDDLE SPEED GB_K	K charging/grid bias set value at middle speed	150 - 850	-663V +/- 5V	-667V +/- 5V
   LOW	A	LOW SPEED GB_K	K charging/grid bias set value at low speed	150 - 850	-663V +/- 5V	-663V +/- 5V

3. Enter the adjustment value (specified value) of the middle speed mode and press [OK] key. Enter the adjustment value of each color mode is specified on the label attached on the MC high voltage power PWB.
   GBK:XXX
   CAUTION:
   Since the MC high voltage output cannot be checked with a digital multimeter in this model, a judgment of the output must be made by checking the print image quality.
   When [EXECUTE] key is pressed, the voltage entered in the procedure 3) is outputted for 30 sec and the set value is saved.
   When [EXECUTE] key is pressed again, the output is stopped. The default values specified for each model must be changed as follows:
   65cpm machine: + 0
   75cpm machine: + 4
   CAUTION:
   Note that the adjustment value may differ depending on the MC high voltage PWB.Since the adjustment value label is attached on the MC 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. When the adjustment value (specified value) of the middle speed mode is set, the adjustment values of the other modes are automatically set according to the middle speed mode setting in a certain relationship.