Oki LP-1040 Maintenance Manual page 539

(2) Two circuit board configuration
1.
Perform the first procedure of 10.1.1 Primary
Charger Load Current Calibration on p.
10-2 so that the front power supply unit is
visible.
2.
Insert the digital multimeter's terminals into
the high voltage power supply unit's CH2AC
terminal. Then activate the developer bias by
going to Test -> DB CHECK in Engine
Maintenance mode (see 2.3.10 Test).
Measure the AC load voltage effective value
Vdba.
Note:
Set the digital multimeter's measurement
range to AC to measure.
3.
If calibration is required, rotate the CH2AC
adjustment volume with a screwdriver for
voltage calibration.
CH2AC adjustment volume
Setting range: 1.40 to 1.50 kV
Ideal value: 1.45kV
CH2AC terminals
(digital multimeter reading = 0.625 to 0.675V)
P-P
(digital multimeter reading = 0.65V)
P-P
Chapter 10 Printer Calibrationt
10-7