Epson EPL-N1200 Service Manual - Page 54

Engine Controller Board, Power Supply Board,

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General Description EPL-N1200 Service Manual 1.5.4 Engine Controller Board The engine controller board consists of an M37451 8-bit CPU (including a P-ROM) and a gate array. The board controls laser scanning (the polygon mirror drive motor), image synchronization, laser beam pulse width, and power. M37451(IC1) Figure 1-20. Engine Controller Board 1.5.5 Power Supply Board The power supply board 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 230 V type. The difference between the two circuits is only in the input section. CAUTION Do not touch VR1 and VR61 on the power supply board. These volumes are for factory setting only. Figure 1-21. Power Supply Board 1-42 Rev. A

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1.5.4
Engine Controller Board
The engine controller board consists of an M37451 8-bit CPU (including a P-ROM) and a gate
array. The board controls laser scanning (the polygon mirror drive motor), image synchronization,
laser beam pulse width, and power.
1.5.5
Power Supply Board
The power supply board 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
230 V type. The difference between the two circuits is only in the input section.
Do not touch VR1 and VR61 on the power supply
board. These volumes are for
factory setting only.
M37451(IC1)
Figure 1-20.
Engine Controller Board
Figure 1-21.
Power Supply Board
General Description
EPL-N1200 Service Manual
1-42
Rev. A