Epson EPL-5500 - PWB-E Board; PWB-F Board; Figure 1-19. PWB-E Board; Figure 1-20. PWB-F Board

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.
CAUTION
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.
CAUTION
Do not touch VR3 on the PWB-F board. These volumes are for factory setting only.
F1
VR1
Figure 1-19. PWB-E Board
VR3
Figure 1-20. PWB-F Board
General Description EPL-5500 Service Manual
1-34 Rev. B