Epson Elp-3500 Service Manual Page 35

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EPSON ELP-3500 Service Manual
2-6
Pin Assignments
Pin 1 (Red)
CN501
Pin 15
CN505
Figure 2-7.
Table 2-4.
Pin No. I/O Signal
1 IN Lamp on/off
2-9 Ground
7 OUT +18 V
8 OUT +12 V (b)
9 OUT +12 V (a)
10-12 OUT +5 V
2.3 MAIN BOARD
The driver board consists of the CPU, P-ROM, video memory, digital video processor,
and circuits to control the interface, control panel, fan, speaker, receptor board interface,
etc. The driver board controls everything, except video signal generation. The driver
board is available as a unit for the service parts.
IC304 includes firmware to set initial values and control projector functions. Fuses, for
the protection of the electric circuits, are soldered on the board Their locations are shown
on the next page.
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