| 摘要 |
PURPOSE:To make it possible to easily perform the adjustment of exciting voltage in an ink jet printer, by providing a variable DC power source circuit for adjusting exciting voltage and an output level adjusting volume for adjusting the adjusted exciting voltage. CONSTITUTION:Because exciting voltage and DC voltage have proportional relation, DC voltage can adjust exciting voltage by a volume VR1 and it is necessary to set the tolerant error of exciting voltage to 2% or less. Because said tolerant error is not satisfied if irregularity of each parts is accumulated, a volume VR2 is added in order to absorb this irregularity. Adjustment is performed by selecting the arbitrary one point of DC voltage at the time of PCB assemblng inspecton while the volume VR1 is revolved and exciting voltage is aligned at this time by rotating the volume VR2. In an important exciting circuit for determining the pulverization of an ink jet printer, because exciting voltage can be adjusted while the DC voltage of a DC voltage variable circuit 5 is looked, exciting voltage can be adjusted by a simple voltmeter without using a highly accurate AC voltmeter. |
