| Revision A |
2.2.2 Main Circuit (Video Controller)
Data sent from the host PC is input to the main circuit via an interface or network board. The C269MAIN, the main circuit of the printer, converts data from the PC into raster data to generate video signals. The video signals turn on/off the laser diode on the printhead to form latent images on the PC drum.
Figure 2-34. Main Circuit Block Diagram
2.2.2.1 Main Component in the Main Circuit Board
The following table lists the main components on the main circuit board.
Table 2-3. Main Components in the Main Circuit Board
Item | Name (Location) | Functions | ||
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| |
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| • | ||
CPU | VR4310 (IC9) |
| (Internal operational frequency: 166.7 MH) | |
|
| • | Clock wavelength: 66.58912MHz | |
|
|
|
| |
|
| • | Memory DMA control | |
ASIC | E05B57EA (IC14) | • Panel - Host interface | ||
• PGI - RIT - Engine interface | ||||
|
| |||
|
| • | EIC | |
|
| 8Mbit Flash | ||
| C215PROG (CN14) | • | Code | |
| • | Local language | ||
|
| |||
|
| • | Expansion ROM | |
|
|
| ||
| ROM (IC7, 8) | 32Mbit | ||
| • | Font | ||
|
| |||
Memory |
|
|
| |
SDRAM (IC4, 20) | 8MB SDRAM | |||
| ||||
| • | Various buffers | ||
|
| |||
|
|
| ||
| (CN8) | Optional | ||
| • | Expansion SDRAM | ||
|
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|
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| ||
| X25128 (IC12) | 128Kbit EEPROM (serial type) | ||
| • | Stores printer settings. | ||
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| |||
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|
| ||
| M51953 (IC13) | Reset IC | ||
| • Reset sat power on. | |||
|
| |||
Others |
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| |
59SC36 (IC405) | Network EEPROM | |||
| ||||
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|
| ||
| LM3411 (IC18) | Regulator IC | ||
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Operating Principles | Electrical Circuit Operating Principles. | 78 |
