Epson EPL-N1200 Service Manual - Page 55

High-Voltage Supply Board, 5.7 Optical Unit,

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EPL-N1200 Service Manual General Description 1.5.6 High-Voltage Supply Board The high-voltage supply circuit board converts the development bias, OPC drum charge bias, and image transfer bias. CAUTION Do not touch VR1 and VR2 on the high-voltage supply board. These volumes are for factory setting only. Figure 1-22. High-Voltage Supply Board 1.5.7 Optical Unit The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor) which drives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam generated by the laser diode is conducted to the OPC drum surface by way of the polygon mirror, as well as several mirrors and lenses, to create a latent electro-photographic image on the drum. Figure 1-23. Optical Unit Rev. A 1-43

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1.5.6 High-Voltage Supply Board
The high-voltage supply circuit board converts the development bias, OPC drum charge bias, and
image transfer bias.
Do not touch VR1 and VR2 on the high-voltage supply board. These volumes are for
factory setting only.
1.5.7 Optical Unit
The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor)
which drives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam
generated by the laser diode is conducted to the OPC drum surface by way of the polygon mirror,
as well as several mirrors and lenses, to create a latent electro-photographic image on the drum.
Figure 1-22.
High-Voltage Supply Board
Figure 1-23.
Optical Unit
EPL-N1200 Service Manual
General Description
Rev. A
1-43