Sharp MX-4100N Service Manual page 50

Remark:
Normally when the default value is set, the specified voltage is out-
putted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
DVK:XXX DVC:XXX DVM:XXX DVY: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.
To adjust all the modes individually, first adjust the middle speed
mode, and then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Follow procedure as outlined above.
Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If a voltage check or adjustment must be made, follow the proce-
dures below.
1) Remove the rear cover of the machine.
2) Open the PWB frame.
3) Go through the modes specified in Simulation 8-1.
4) Select an output mode to be adjusted with the mode key and
the scroll key.
5) Check the relationship between the check pin on the MC/DV
high voltage PWB and each adjustment mode.
6) Connect the digital multi-meter leads at the check pin and
GND on the MC/DV high voltage PWB corresponding to the
particular adjustment mode.
7) Press [EXECUTE] key.
The main charger voltage is outputted for 30sec.
8) Check the monitor voltage with the digital multi-meter.
If the monitor voltage is not in the range of the specified values
shown in the table above, change the adjustment value and
adjust. If the specified value voltage is not obtained even
though the adjustment value is changed, the following parts
may be defective.
• MC/DV high voltage PWB
• PCU PWB
• Development unit
• OPC drum unit
• High voltage circuit electrode
2
1
MX-5001N ADJUSTMENTS 5 – 8