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1.5.1 C180 MAIN Board
The C180 MAIN board contains a parallel interface controller and engine controller board. The primary
functions of this board are receiving print data from the host and sending the print image to the engine
controller via the video interface.
❏ Memory chips
4M-bit DRAM (U4)
❏ Custom ICs
ASIC E05B23 (U6)
The engine controller consists of an M3807 x 8-bit CPU, including a MASK ROM. It controls laser scanning
(the polygon mirror drive motor), image synchronization, laser beam pulse width, and power.
M3807
(IC201)
E05B23
(U6)
4M DRAM
(U4)
Figure 1-5. C180 MAIN Board
EPL-5500W Service Manual General Description
Rev. A 1-13