Epson EPL-9000 Service Manual page 48

Service Manual
1.5.4 Board
This is the engine controller board. It consists ofanpPD782388-bit CPU (including a MASK ROM)
and a gate array. The board controls laser
synchronization, laser beam pulse width, and power.
1.5.5 Unit
The unit is the low-voltage supply unit, which consists of a switching regulator circuit. It
converts the line voltage into
board, the 120V type and 220/240V type. The difference between the two circuits is only in the
input section.
Rev. A
g (the polygon mirror drive motor), image
-
CPU
/
Figure 1-20.
and +5 VDC voltages. There are two types of power supply
Figure 1-21.
General Description
(Ul)
SMA7029M
Board
Unit
1-37