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1.5.2 PWB-E Board
The PWB-E is the power supply board, which consists of a switching regulator circuit. It converts the AC
line voltage into +24 V and +5 VDC voltages. There are two types of power supply board, the 100/120 V
type and 220/240 V type. The difference between the two circuits is only in the input section.
Do not touch VR1 on PWB-E board. This volume is for factory setting only.
1.5.3 PWB-F Board
The PWB-F is the high-voltage supply circuit board. It converts the development bias, OPC drum charge
bias, and image transfer bias.
Do not touch VR3 on the PWB-F board. These volumes are for factory setting only.
F1
VR1
Figure 1-6. PWB-E Board
VR3
Figure 1-7. PWB-F Board
General Description EPL-5500W Service Manual
1-14 Rev. A